Power management updates for 5.19-rc1

- Update the Energy Model support code to allow the Energy Model to be
    artificial, which means that the power values may not be on a uniform
    scale with other devices providing power information, and update the
    cpufreq_cooling and devfreq_cooling thermal drivers to support
    artificial Energy Models (Lukasz Luba).
 
  - Make DTPM check the Energy Model type (Lukasz Luba).
 
  - Fix policy counter decrementation in cpufreq if Energy Model is in
    use (Pierre Gondois).
 
  - Add CPU-based scaling support to passive devfreq governor (Saravana
    Kannan, Chanwoo Choi).
 
  - Update the rk3399_dmc devfreq driver (Brian Norris).
 
  - Export dev_pm_ops instead of suspend() and resume() in the IIO
    chemical scd30 driver (Jonathan Cameron).
 
  - Add namespace variants of EXPORT[_GPL]_SIMPLE_DEV_PM_OPS and
    PM-runtime counterparts (Jonathan Cameron).
 
  - Move symbol exports in the IIO chemical scd30 driver into the
    IIO_SCD30 namespace (Jonathan Cameron).
 
  - Avoid device PM-runtime usage count underflows (Rafael Wysocki).
 
  - Allow dynamic debug to control printing of PM messages  (David
    Cohen).
 
  - Fix some kernel-doc comments in hibernation code (Yang Li, Haowen
    Bai).
 
  - Preserve ACPI-table override during hibernation (Amadeusz Sławiński).
 
  - Improve support for suspend-to-RAM for PSCI OSI mode (Ulf Hansson).
 
  - Make Intel RAPL power capping driver support the RaptorLake and
    AlderLake N processors (Zhang Rui, Sumeet Pawnikar).
 
  - Remove redundant store to value after multiply in the RAPL power
    capping driver (Colin Ian King).
 
  - Add AlderLake processor support to the intel_idle driver (Zhang Rui).
 
  - Fix regression leading to no genpd governor in the PSCI cpuidle
    driver and fix the riscv-sbi cpuidle driver to allow a genpd
    governor to be used (Ulf Hansson).
 
  - Fix cpufreq governor clean up code to avoid using kfree() directly
    to free kobject-based items (Kevin Hao).
 
  - Prepare cpufreq for powerpc's asm/prom.h cleanup (Christophe Leroy).
 
  - Make intel_pstate notify frequency invariance code when no_turbo is
    turned on and off (Chen Yu).
 
  - Add Sapphire Rapids OOB mode support to intel_pstate (Srinivas
    Pandruvada).
 
  - Make cpufreq avoid unnecessary frequency updates due to mismatch
    between hardware and the frequency table (Viresh Kumar).
 
  - Make remove_cpu_dev_symlink() clear the real_cpus mask to simplify
    code (Viresh Kumar).
 
  - Rearrange cpufreq_offline() and cpufreq_remove_dev() to make the
    calling convention for some driver callbacks consistent (Rafael
    Wysocki).
 
  - Avoid accessing half-initialized cpufreq policies from the show()
    and store() sysfs functions (Schspa Shi).
 
  - Rearrange cpufreq_offline() to make the calling convention for some
    driver callbacks consistent (Schspa Shi).
 
  - Update CPPC handling in cpufreq (Pierre Gondois).
 
  - Extend dev_pm_domain_detach() doc (Krzysztof Kozlowski).
 
  - Move genpd's time-accounting to ktime_get_mono_fast_ns() (Ulf
    Hansson).
 
  - Improve the way genpd deals with its governors (Ulf Hansson).
 
  - Update the turbostat utility to version 2022.04.16 (Len Brown,
    Dan Merillat, Sumeet Pawnikar, Zephaniah E. Loss-Cutler-Hull, Chen
    Yu).
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Merge tag 'pm-5.19-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm

Pull power management updates from Rafael Wysocki:
 "These add support for 'artificial' Energy Models in which power
  numbers for different entities may be in different scales, add support
  for some new hardware, fix bugs and clean up code in multiple places.

  Specifics:

   - Update the Energy Model support code to allow the Energy Model to
     be artificial, which means that the power values may not be on a
     uniform scale with other devices providing power information, and
     update the cpufreq_cooling and devfreq_cooling thermal drivers to
     support artificial Energy Models (Lukasz Luba).

   - Make DTPM check the Energy Model type (Lukasz Luba).

   - Fix policy counter decrementation in cpufreq if Energy Model is in
     use (Pierre Gondois).

   - Add CPU-based scaling support to passive devfreq governor (Saravana
     Kannan, Chanwoo Choi).

   - Update the rk3399_dmc devfreq driver (Brian Norris).

   - Export dev_pm_ops instead of suspend() and resume() in the IIO
     chemical scd30 driver (Jonathan Cameron).

   - Add namespace variants of EXPORT[_GPL]_SIMPLE_DEV_PM_OPS and
     PM-runtime counterparts (Jonathan Cameron).

   - Move symbol exports in the IIO chemical scd30 driver into the
     IIO_SCD30 namespace (Jonathan Cameron).

   - Avoid device PM-runtime usage count underflows (Rafael Wysocki).

   - Allow dynamic debug to control printing of PM messages (David
     Cohen).

   - Fix some kernel-doc comments in hibernation code (Yang Li, Haowen
     Bai).

   - Preserve ACPI-table override during hibernation (Amadeusz
     Sławiński).

   - Improve support for suspend-to-RAM for PSCI OSI mode (Ulf Hansson).

   - Make Intel RAPL power capping driver support the RaptorLake and
     AlderLake N processors (Zhang Rui, Sumeet Pawnikar).

   - Remove redundant store to value after multiply in the RAPL power
     capping driver (Colin Ian King).

   - Add AlderLake processor support to the intel_idle driver (Zhang
     Rui).

   - Fix regression leading to no genpd governor in the PSCI cpuidle
     driver and fix the riscv-sbi cpuidle driver to allow a genpd
     governor to be used (Ulf Hansson).

   - Fix cpufreq governor clean up code to avoid using kfree() directly
     to free kobject-based items (Kevin Hao).

   - Prepare cpufreq for powerpc's asm/prom.h cleanup (Christophe
     Leroy).

   - Make intel_pstate notify frequency invariance code when no_turbo is
     turned on and off (Chen Yu).

   - Add Sapphire Rapids OOB mode support to intel_pstate (Srinivas
     Pandruvada).

   - Make cpufreq avoid unnecessary frequency updates due to mismatch
     between hardware and the frequency table (Viresh Kumar).

   - Make remove_cpu_dev_symlink() clear the real_cpus mask to simplify
     code (Viresh Kumar).

   - Rearrange cpufreq_offline() and cpufreq_remove_dev() to make the
     calling convention for some driver callbacks consistent (Rafael
     Wysocki).

   - Avoid accessing half-initialized cpufreq policies from the show()
     and store() sysfs functions (Schspa Shi).

   - Rearrange cpufreq_offline() to make the calling convention for some
     driver callbacks consistent (Schspa Shi).

   - Update CPPC handling in cpufreq (Pierre Gondois).

   - Extend dev_pm_domain_detach() doc (Krzysztof Kozlowski).

   - Move genpd's time-accounting to ktime_get_mono_fast_ns() (Ulf
     Hansson).

   - Improve the way genpd deals with its governors (Ulf Hansson).

   - Update the turbostat utility to version 2022.04.16 (Len Brown, Dan
     Merillat, Sumeet Pawnikar, Zephaniah E. Loss-Cutler-Hull, Chen Yu)"

* tag 'pm-5.19-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm: (94 commits)
  PM: domains: Trust domain-idle-states from DT to be correct by genpd
  PM: domains: Measure power-on/off latencies in genpd based on a governor
  PM: domains: Allocate governor data dynamically based on a genpd governor
  PM: domains: Clean up some code in pm_genpd_init() and genpd_remove()
  PM: domains: Fix initialization of genpd's next_wakeup
  PM: domains: Fixup QoS latency measurements for IRQ safe devices in genpd
  PM: domains: Measure suspend/resume latencies in genpd based on governor
  PM: domains: Move the next_wakeup variable into the struct gpd_timing_data
  PM: domains: Allocate gpd_timing_data dynamically based on governor
  PM: domains: Skip another warning in irq_safe_dev_in_sleep_domain()
  PM: domains: Rename irq_safe_dev_in_no_sleep_domain() in genpd
  PM: domains: Don't check PM_QOS_FLAG_NO_POWER_OFF in genpd
  PM: domains: Drop redundant code for genpd always-on governor
  PM: domains: Add GENPD_FLAG_RPM_ALWAYS_ON for the always-on governor
  powercap: intel_rapl: remove redundant store to value after multiply
  cpufreq: CPPC: Enable dvfs_possible_from_any_cpu
  cpufreq: CPPC: Enable fast_switch
  ACPI: CPPC: Assume no transition latency if no PCCT
  ACPI: bus: Set CPPC _OSC bits for all and when CPPC_LIB is supported
  ACPI: CPPC: Check _OSC for flexible address space
  ...

Documentation/devicetree/bindings/devfreq/rk3399_dmc.txt

@@ -1,212 +0,0 @@
-* Rockchip rk3399 DMC (Dynamic Memory Controller) device
-
-Required properties:
-- compatible:		 Must be "rockchip,rk3399-dmc".
-- devfreq-events:	 Node to get DDR loading, Refer to
-			 Documentation/devicetree/bindings/devfreq/event/
-			 rockchip-dfi.txt
-- clocks:		 Phandles for clock specified in "clock-names" property
-- clock-names :		 The name of clock used by the DFI, must be
-			 "pclk_ddr_mon";
-- operating-points-v2:	 Refer to Documentation/devicetree/bindings/opp/opp-v2.yaml
-			 for details.
-- center-supply:	 DMC supply node.
-- status:		 Marks the node enabled/disabled.
-- rockchip,pmu:		 Phandle to the syscon managing the "PMU general register
-			 files".
-
-Optional properties:
-- interrupts:		 The CPU interrupt number. The interrupt specifier
-			 format depends on the interrupt controller.
-			 It should be a DCF interrupt. When DDR DVFS finishes
-			 a DCF interrupt is triggered.
-- rockchip,pmu:		 Phandle to the syscon managing the "PMU general register
-			 files".
-
-Following properties relate to DDR timing:
-
-- rockchip,dram_speed_bin :	  Value reference include/dt-bindings/clock/rk3399-ddr.h,
-				  it selects the DDR3 cl-trp-trcd type. It must be
-				  set according to "Speed Bin" in DDR3 datasheet,
-				  DO NOT use a smaller "Speed Bin" than specified
-				  for the DDR3 being used.
-
-- rockchip,pd_idle :		  Configure the PD_IDLE value. Defines the
-				  power-down idle period in which memories are
-				  placed into power-down mode if bus is idle
-				  for PD_IDLE DFI clock cycles.
-
-- rockchip,sr_idle :		  Configure the SR_IDLE value. Defines the
-				  self-refresh idle period in which memories are
-				  placed into self-refresh mode if bus is idle
-				  for SR_IDLE * 1024 DFI clock cycles (DFI
-				  clocks freq is half of DRAM clock), default
-				  value is "0".
-
-- rockchip,sr_mc_gate_idle :	  Defines the memory self-refresh and controller
-				  clock gating idle period. Memories are placed
-				  into self-refresh mode and memory controller
-				  clock arg gating started if bus is idle for
-				  sr_mc_gate_idle*1024 DFI clock cycles.
-
-- rockchip,srpd_lite_idle :	  Defines the self-refresh power down idle
-				  period in which memories are placed into
-				  self-refresh power down mode if bus is idle
-				  for srpd_lite_idle * 1024 DFI clock cycles.
-				  This parameter is for LPDDR4 only.
-
-- rockchip,standby_idle :	  Defines the standby idle period in which
-				  memories are placed into self-refresh mode.
-				  The controller, pi, PHY and DRAM clock will
-				  be gated if bus is idle for standby_idle * DFI
-				  clock cycles.
-
-- rockchip,dram_dll_dis_freq :	  Defines the DDR3 DLL bypass frequency in MHz.
-				  When DDR frequency is less than DRAM_DLL_DISB_FREQ,
-				  DDR3 DLL will be bypassed. Note: if DLL was bypassed,
-				  the odt will also stop working.
-
-- rockchip,phy_dll_dis_freq :	  Defines the PHY dll bypass frequency in
-				  MHz (Mega Hz). When DDR frequency is less than
-				  DRAM_DLL_DISB_FREQ, PHY DLL will be bypassed.
-				  Note: PHY DLL and PHY ODT are independent.
-
-- rockchip,ddr3_odt_dis_freq :	  When the DRAM type is DDR3, this parameter defines
-				  the ODT disable frequency in MHz (Mega Hz).
-				  when the DDR frequency is  less then ddr3_odt_dis_freq,
-				  the ODT on the DRAM side and controller side are
-				  both disabled.
-
-- rockchip,ddr3_drv :		  When the DRAM type is DDR3, this parameter defines
-				  the DRAM side driver strength in ohms. Default
-				  value is 40.
-
-- rockchip,ddr3_odt :		  When the DRAM type is DDR3, this parameter defines
-				  the DRAM side ODT strength in ohms. Default value
-				  is 120.
-
-- rockchip,phy_ddr3_ca_drv :	  When the DRAM type is DDR3, this parameter defines
-				  the phy side CA line (incluing command line,
-				  address line and clock line) driver strength.
-				  Default value is 40.
-
-- rockchip,phy_ddr3_dq_drv :	  When the DRAM type is DDR3, this parameter defines
-				  the PHY side DQ line (including DQS/DQ/DM line)
-				  driver strength. Default value is 40.
-
-- rockchip,phy_ddr3_odt : 	  When the DRAM type is DDR3, this parameter defines
-				  the PHY side ODT strength. Default value is 240.
-
-- rockchip,lpddr3_odt_dis_freq : When the DRAM type is LPDDR3, this parameter defines
-				  then ODT disable frequency in MHz (Mega Hz).
-				  When DDR frequency is less then ddr3_odt_dis_freq,
-				  the ODT on the DRAM side and controller side are
-				  both disabled.
-
-- rockchip,lpddr3_drv :		  When the DRAM type is LPDDR3, this parameter defines
-				  the DRAM side driver strength in ohms. Default
-				  value is 34.
-
-- rockchip,lpddr3_odt :		  When the DRAM type is LPDDR3, this parameter defines
-				  the DRAM side ODT strength in ohms. Default value
-				  is 240.
-
-- rockchip,phy_lpddr3_ca_drv :	  When the DRAM type is LPDDR3, this parameter defines
-				  the PHY side CA line (including command line,
-				  address line and clock line) driver strength.
-				  Default value is 40.
-
-- rockchip,phy_lpddr3_dq_drv :	  When the DRAM type is LPDDR3, this parameter defines
-				  the PHY side DQ line (including DQS/DQ/DM line)
-				  driver strength. Default value is 40.
-
-- rockchip,phy_lpddr3_odt : 	  When dram type is LPDDR3, this parameter define
-				  the phy side odt strength, default value is 240.
-
-- rockchip,lpddr4_odt_dis_freq : When the DRAM type is LPDDR4, this parameter
-				  defines the ODT disable frequency in
-				  MHz (Mega Hz). When the DDR frequency is less then
-				  ddr3_odt_dis_freq, the ODT on the DRAM side and
-				  controller side are both disabled.
-
-- rockchip,lpddr4_drv :		  When the DRAM type is LPDDR4, this parameter defines
-				  the DRAM side driver strength in ohms. Default
-				  value is 60.
-
-- rockchip,lpddr4_dq_odt : 	  When the DRAM type is LPDDR4, this parameter defines
-				  the DRAM side ODT on DQS/DQ line strength in ohms.
-				  Default value is 40.
-
-- rockchip,lpddr4_ca_odt :	  When the DRAM type is LPDDR4, this parameter defines
-				  the DRAM side ODT on CA line strength in ohms.
-				  Default value is 40.
-
-- rockchip,phy_lpddr4_ca_drv :	  When the DRAM type is LPDDR4, this parameter defines
-				  the PHY side CA line (including command address
-				  line) driver strength. Default value is 40.
-
-- rockchip,phy_lpddr4_ck_cs_drv : When the DRAM type is LPDDR4, this parameter defines
-				  the PHY side clock line and CS line driver
-				  strength. Default value is 80.
-
-- rockchip,phy_lpddr4_dq_drv :	  When the DRAM type is LPDDR4, this parameter defines
-				  the PHY side DQ line (including DQS/DQ/DM line)
-				  driver strength. Default value is 80.
-
-- rockchip,phy_lpddr4_odt :	  When the DRAM type is LPDDR4, this parameter defines
-				  the PHY side ODT strength. Default value is 60.
-
-Example:
-	dmc_opp_table: dmc_opp_table {
-		compatible = "operating-points-v2";
-
-		opp00 {
-			opp-hz = /bits/ 64 <300000000>;
-			opp-microvolt = <900000>;
-		};
-		opp01 {
-			opp-hz = /bits/ 64 <666000000>;
-			opp-microvolt = <900000>;
-		};
-	};
-
-	dmc: dmc {
-		compatible = "rockchip,rk3399-dmc";
-		devfreq-events = <&dfi>;
-		interrupts = <GIC_SPI 1 IRQ_TYPE_LEVEL_HIGH>;
-		clocks = <&cru SCLK_DDRC>;
-		clock-names = "dmc_clk";
-		operating-points-v2 = <&dmc_opp_table>;
-		center-supply = <&ppvar_centerlogic>;
-		upthreshold = <15>;
-		downdifferential = <10>;
-		rockchip,ddr3_speed_bin = <21>;
-		rockchip,pd_idle = <0x40>;
-		rockchip,sr_idle = <0x2>;
-		rockchip,sr_mc_gate_idle = <0x3>;
-		rockchip,srpd_lite_idle	= <0x4>;
-		rockchip,standby_idle = <0x2000>;
-		rockchip,dram_dll_dis_freq = <300>;
-		rockchip,phy_dll_dis_freq = <125>;
-		rockchip,auto_pd_dis_freq = <666>;
-		rockchip,ddr3_odt_dis_freq = <333>;
-		rockchip,ddr3_drv = <40>;
-		rockchip,ddr3_odt = <120>;
-		rockchip,phy_ddr3_ca_drv = <40>;
-		rockchip,phy_ddr3_dq_drv = <40>;
-		rockchip,phy_ddr3_odt = <240>;
-		rockchip,lpddr3_odt_dis_freq = <333>;
-		rockchip,lpddr3_drv = <34>;
-		rockchip,lpddr3_odt = <240>;
-		rockchip,phy_lpddr3_ca_drv = <40>;
-		rockchip,phy_lpddr3_dq_drv = <40>;
-		rockchip,phy_lpddr3_odt = <240>;
-		rockchip,lpddr4_odt_dis_freq = <333>;
-		rockchip,lpddr4_drv = <60>;
-		rockchip,lpddr4_dq_odt = <40>;
-		rockchip,lpddr4_ca_odt = <40>;
-		rockchip,phy_lpddr4_ca_drv = <40>;
-		rockchip,phy_lpddr4_ck_cs_drv = <80>;
-		rockchip,phy_lpddr4_dq_drv = <80>;
-		rockchip,phy_lpddr4_odt = <60>;
-	};

Documentation/devicetree/bindings/memory-controllers/rockchip,rk3399-dmc.yaml

@@ -0,0 +1,384 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+# %YAML 1.2
+---
+$id: http://devicetree.org/schemas/memory-controllers/rockchip,rk3399-dmc.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Rockchip rk3399 DMC (Dynamic Memory Controller) device
+
+maintainers:
+  - Brian Norris <briannorris@chromium.org>
+
+properties:
+  compatible:
+    enum:
+      - rockchip,rk3399-dmc
+
+  devfreq-events:
+    $ref: /schemas/types.yaml#/definitions/phandle
+    description:
+      Node to get DDR loading. Refer to
+      Documentation/devicetree/bindings/devfreq/event/rockchip-dfi.txt.
+
+  clocks:
+    maxItems: 1
+
+  clock-names:
+    items:
+      - const: dmc_clk
+
+  operating-points-v2: true
+
+  center-supply:
+    description:
+      DMC regulator supply.
+
+  rockchip,pmu:
+    $ref: /schemas/types.yaml#/definitions/phandle
+    description:
+      Phandle to the syscon managing the "PMU general register files".
+
+  interrupts:
+    maxItems: 1
+    description:
+      The CPU interrupt number. It should be a DCF interrupt. When DDR DVFS
+      finishes, a DCF interrupt is triggered.
+
+  rockchip,ddr3_speed_bin:
+    deprecated: true
+    $ref: /schemas/types.yaml#/definitions/uint32
+    description:
+      For values, reference include/dt-bindings/clock/rk3399-ddr.h. Selects the
+      DDR3 cl-trp-trcd type. It must be set according to "Speed Bin" in DDR3
+      datasheet; DO NOT use a smaller "Speed Bin" than specified for the DDR3
+      being used.
+
+  rockchip,pd_idle:
+    deprecated: true
+    $ref: /schemas/types.yaml#/definitions/uint32
+    description:
+      Configure the PD_IDLE value. Defines the power-down idle period in which
+      memories are placed into power-down mode if bus is idle for PD_IDLE DFI
+      clock cycles.
+      See also rockchip,pd-idle-ns.
+
+  rockchip,sr_idle:
+    deprecated: true
+    $ref: /schemas/types.yaml#/definitions/uint32
+    description:
+      Configure the SR_IDLE value. Defines the self-refresh idle period in
+      which memories are placed into self-refresh mode if bus is idle for
+      SR_IDLE * 1024 DFI clock cycles (DFI clocks freq is half of DRAM clock).
+      See also rockchip,sr-idle-ns.
+    default: 0
+
+  rockchip,sr_mc_gate_idle:
+    deprecated: true
+    $ref: /schemas/types.yaml#/definitions/uint32
+    description:
+      Defines the memory self-refresh and controller clock gating idle period.
+      Memories are placed into self-refresh mode and memory controller clock
+      arg gating started if bus is idle for sr_mc_gate_idle*1024 DFI clock
+      cycles.
+      See also rockchip,sr-mc-gate-idle-ns.
+
+  rockchip,srpd_lite_idle:
+    deprecated: true
+    $ref: /schemas/types.yaml#/definitions/uint32
+    description:
+      Defines the self-refresh power down idle period in which memories are
+      placed into self-refresh power down mode if bus is idle for
+      srpd_lite_idle * 1024 DFI clock cycles. This parameter is for LPDDR4
+      only.
+      See also rockchip,srpd-lite-idle-ns.
+
+  rockchip,standby_idle:
+    deprecated: true
+    $ref: /schemas/types.yaml#/definitions/uint32
+    description:
+      Defines the standby idle period in which memories are placed into
+      self-refresh mode. The controller, pi, PHY and DRAM clock will be gated
+      if bus is idle for standby_idle * DFI clock cycles.
+      See also rockchip,standby-idle-ns.
+
+  rockchip,dram_dll_dis_freq:
+    deprecated: true
+    $ref: /schemas/types.yaml#/definitions/uint32
+    description: |
+      Defines the DDR3 DLL bypass frequency in MHz. When DDR frequency is less
+      than DRAM_DLL_DISB_FREQ, DDR3 DLL will be bypassed.
+      Note: if DLL was bypassed, the odt will also stop working.
+
+  rockchip,phy_dll_dis_freq:
+    deprecated: true
+    $ref: /schemas/types.yaml#/definitions/uint32
+    description: |
+      Defines the PHY dll bypass frequency in MHz (Mega Hz). When DDR frequency
+      is less than DRAM_DLL_DISB_FREQ, PHY DLL will be bypassed.
+      Note: PHY DLL and PHY ODT are independent.
+
+  rockchip,auto_pd_dis_freq:
+    deprecated: true
+    $ref: /schemas/types.yaml#/definitions/uint32
+    description:
+      Defines the auto PD disable frequency in MHz.
+
+  rockchip,ddr3_odt_dis_freq:
+    $ref: /schemas/types.yaml#/definitions/uint32
+    minimum: 1000000  # In case anyone thought this was MHz.
+    description:
+      When the DRAM type is DDR3, this parameter defines the ODT disable
+      frequency in Hz. When the DDR frequency is less then ddr3_odt_dis_freq,
+      the ODT on the DRAM side and controller side are both disabled.
+
+  rockchip,ddr3_drv:
+    deprecated: true
+    $ref: /schemas/types.yaml#/definitions/uint32
+    description:
+      When the DRAM type is DDR3, this parameter defines the DRAM side drive
+      strength in ohms.
+    default: 40
+
+  rockchip,ddr3_odt:
+    deprecated: true
+    $ref: /schemas/types.yaml#/definitions/uint32
+    description:
+      When the DRAM type is DDR3, this parameter defines the DRAM side ODT
+      strength in ohms.
+    default: 120
+
+  rockchip,phy_ddr3_ca_drv:
+    deprecated: true
+    $ref: /schemas/types.yaml#/definitions/uint32
+    description:
+      When the DRAM type is DDR3, this parameter defines the phy side CA line
+      (incluing command line, address line and clock line) drive strength.
+    default: 40
+
+  rockchip,phy_ddr3_dq_drv:
+    deprecated: true
+    $ref: /schemas/types.yaml#/definitions/uint32
+    description:
+      When the DRAM type is DDR3, this parameter defines the PHY side DQ line
+      (including DQS/DQ/DM line) drive strength.
+    default: 40
+
+  rockchip,phy_ddr3_odt:
+    deprecated: true
+    $ref: /schemas/types.yaml#/definitions/uint32
+    description:
+      When the DRAM type is DDR3, this parameter defines the PHY side ODT
+      strength.
+    default: 240
+
+  rockchip,lpddr3_odt_dis_freq:
+    $ref: /schemas/types.yaml#/definitions/uint32
+    minimum: 1000000  # In case anyone thought this was MHz.
+    description:
+      When the DRAM type is LPDDR3, this parameter defines then ODT disable
+      frequency in Hz. When DDR frequency is less then ddr3_odt_dis_freq, the
+      ODT on the DRAM side and controller side are both disabled.
+
+  rockchip,lpddr3_drv:
+    deprecated: true
+    $ref: /schemas/types.yaml#/definitions/uint32
+    description:
+      When the DRAM type is LPDDR3, this parameter defines the DRAM side drive
+      strength in ohms.
+    default: 34
+
+  rockchip,lpddr3_odt:
+    deprecated: true
+    $ref: /schemas/types.yaml#/definitions/uint32
+    description:
+      When the DRAM type is LPDDR3, this parameter defines the DRAM side ODT
+      strength in ohms.
+    default: 240
+
+  rockchip,phy_lpddr3_ca_drv:
+    deprecated: true
+    $ref: /schemas/types.yaml#/definitions/uint32
+    description:
+      When the DRAM type is LPDDR3, this parameter defines the PHY side CA line
+      (including command line, address line and clock line) drive strength.
+    default: 40
+
+  rockchip,phy_lpddr3_dq_drv:
+    deprecated: true
+    $ref: /schemas/types.yaml#/definitions/uint32
+    description:
+      When the DRAM type is LPDDR3, this parameter defines the PHY side DQ line
+      (including DQS/DQ/DM line) drive strength.
+    default: 40
+
+  rockchip,phy_lpddr3_odt:
+    deprecated: true
+    $ref: /schemas/types.yaml#/definitions/uint32
+    description:
+      When dram type is LPDDR3, this parameter define the phy side odt
+      strength, default value is 240.
+
+  rockchip,lpddr4_odt_dis_freq:
+    $ref: /schemas/types.yaml#/definitions/uint32
+    minimum: 1000000  # In case anyone thought this was MHz.
+    description:
+      When the DRAM type is LPDDR4, this parameter defines the ODT disable
+      frequency in Hz. When the DDR frequency is less then ddr3_odt_dis_freq,
+      the ODT on the DRAM side and controller side are both disabled.
+
+  rockchip,lpddr4_drv:
+    deprecated: true
+    $ref: /schemas/types.yaml#/definitions/uint32
+    description:
+      When the DRAM type is LPDDR4, this parameter defines the DRAM side drive
+      strength in ohms.
+    default: 60
+
+  rockchip,lpddr4_dq_odt:
+    deprecated: true
+    $ref: /schemas/types.yaml#/definitions/uint32
+    description:
+      When the DRAM type is LPDDR4, this parameter defines the DRAM side ODT on
+      DQS/DQ line strength in ohms.
+    default: 40
+
+  rockchip,lpddr4_ca_odt:
+    deprecated: true
+    $ref: /schemas/types.yaml#/definitions/uint32
+    description:
+      When the DRAM type is LPDDR4, this parameter defines the DRAM side ODT on
+      CA line strength in ohms.
+    default: 40
+
+  rockchip,phy_lpddr4_ca_drv:
+    deprecated: true
+    $ref: /schemas/types.yaml#/definitions/uint32
+    description:
+      When the DRAM type is LPDDR4, this parameter defines the PHY side CA line
+      (including command address line) drive strength.
+    default: 40
+
+  rockchip,phy_lpddr4_ck_cs_drv:
+    deprecated: true
+    $ref: /schemas/types.yaml#/definitions/uint32
+    description:
+      When the DRAM type is LPDDR4, this parameter defines the PHY side clock
+      line and CS line drive strength.
+    default: 80
+
+  rockchip,phy_lpddr4_dq_drv:
+    deprecated: true
+    $ref: /schemas/types.yaml#/definitions/uint32
+    description:
+      When the DRAM type is LPDDR4, this parameter defines the PHY side DQ line
+      (including DQS/DQ/DM line) drive strength.
+    default: 80
+
+  rockchip,phy_lpddr4_odt:
+    deprecated: true
+    $ref: /schemas/types.yaml#/definitions/uint32
+    description:
+      When the DRAM type is LPDDR4, this parameter defines the PHY side ODT
+      strength.
+    default: 60
+
+  rockchip,pd-idle-ns:
+    description:
+      Configure the PD_IDLE value in nanoseconds. Defines the power-down idle
+      period in which memories are placed into power-down mode if bus is idle
+      for PD_IDLE nanoseconds.
+
+  rockchip,sr-idle-ns:
+    description:
+      Configure the SR_IDLE value in nanoseconds. Defines the self-refresh idle
+      period in which memories are placed into self-refresh mode if bus is idle
+      for SR_IDLE nanoseconds.
+    default: 0
+
+  rockchip,sr-mc-gate-idle-ns:
+    description:
+      Defines the memory self-refresh and controller clock gating idle period in nanoseconds.
+      Memories are placed into self-refresh mode and memory controller clock
+      arg gating started if bus is idle for sr_mc_gate_idle nanoseconds.
+
+  rockchip,srpd-lite-idle-ns:
+    description:
+      Defines the self-refresh power down idle period in which memories are
+      placed into self-refresh power down mode if bus is idle for
+      srpd_lite_idle nanoseonds. This parameter is for LPDDR4 only.
+
+  rockchip,standby-idle-ns:
+    description:
+      Defines the standby idle period in which memories are placed into
+      self-refresh mode. The controller, pi, PHY and DRAM clock will be gated
+      if bus is idle for standby_idle nanoseconds.
+
+  rockchip,pd-idle-dis-freq-hz:
+    description:
+      Defines the power-down idle disable frequency in Hz. When the DDR
+      frequency is greater than pd-idle-dis-freq, power-down idle is disabled.
+      See also rockchip,pd-idle-ns.
+
+  rockchip,sr-idle-dis-freq-hz:
+    description:
+      Defines the self-refresh idle disable frequency in Hz. When the DDR
+      frequency is greater than sr-idle-dis-freq, self-refresh idle is
+      disabled. See also rockchip,sr-idle-ns.
+
+  rockchip,sr-mc-gate-idle-dis-freq-hz:
+    description:
+      Defines the self-refresh and memory-controller clock gating disable
+      frequency in Hz. When the DDR frequency is greater than
+      sr-mc-gate-idle-dis-freq, the clock will not be gated when idle. See also
+      rockchip,sr-mc-gate-idle-ns.
+
+  rockchip,srpd-lite-idle-dis-freq-hz:
+    description:
+      Defines the self-refresh power down idle disable frequency in Hz. When
+      the DDR frequency is greater than srpd-lite-idle-dis-freq, memory will
+      not be placed into self-refresh power down mode when idle. See also
+      rockchip,srpd-lite-idle-ns.
+
+  rockchip,standby-idle-dis-freq-hz:
+    description:
+      Defines the standby idle disable frequency in Hz. When the DDR frequency
+      is greater than standby-idle-dis-freq, standby idle is disabled. See also
+      rockchip,standby-idle-ns.
+
+required:
+  - compatible
+  - devfreq-events
+  - clocks
+  - clock-names
+  - operating-points-v2
+  - center-supply
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/clock/rk3399-cru.h>
+    #include <dt-bindings/interrupt-controller/arm-gic.h>
+    memory-controller {
+      compatible = "rockchip,rk3399-dmc";
+      devfreq-events = <&dfi>;
+      rockchip,pmu = <&pmu>;
+      interrupts = <GIC_SPI 1 IRQ_TYPE_LEVEL_HIGH>;
+      clocks = <&cru SCLK_DDRC>;
+      clock-names = "dmc_clk";
+      operating-points-v2 = <&dmc_opp_table>;
+      center-supply = <&ppvar_centerlogic>;
+      rockchip,pd-idle-ns = <160>;
+      rockchip,sr-idle-ns = <10240>;
+      rockchip,sr-mc-gate-idle-ns = <40960>;
+      rockchip,srpd-lite-idle-ns = <61440>;
+      rockchip,standby-idle-ns = <81920>;
+      rockchip,ddr3_odt_dis_freq = <333000000>;
+      rockchip,lpddr3_odt_dis_freq = <333000000>;
+      rockchip,lpddr4_odt_dis_freq = <333000000>;
+      rockchip,pd-idle-dis-freq-hz = <1000000000>;
+      rockchip,sr-idle-dis-freq-hz = <1000000000>;
+      rockchip,sr-mc-gate-idle-dis-freq-hz = <1000000000>;
+      rockchip,srpd-lite-idle-dis-freq-hz = <0>;
+      rockchip,standby-idle-dis-freq-hz = <928000000>;
+    };

Documentation/power/energy-model.rst

@@ -123,6 +123,26 @@ allows a platform to register EM power values which are reflecting total power
 (static + dynamic). These power values might be coming directly from
 experiments and measurements.
 
+Registration of 'artificial' EM
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+There is an option to provide a custom callback for drivers missing detailed
+knowledge about power value for each performance state. The callback
+.get_cost() is optional and provides the 'cost' values used by the EAS.
+This is useful for platforms that only provide information on relative
+efficiency between CPU types, where one could use the information to
+create an abstract power model. But even an abstract power model can
+sometimes be hard to fit in, given the input power value size restrictions.
+The .get_cost() allows to provide the 'cost' values which reflect the
+efficiency of the CPUs. This would allow to provide EAS information which
+has different relation than what would be forced by the EM internal
+formulas calculating 'cost' values. To register an EM for such platform, the
+driver must set the flag 'milliwatts' to 0, provide .get_power() callback
+and provide .get_cost() callback. The EM framework would handle such platform
+properly during registration. A flag EM_PERF_DOMAIN_ARTIFICIAL is set for such
+platform. Special care should be taken by other frameworks which are using EM
+to test and treat this flag properly.
+
 Registration of 'simple' EM
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~
 
@@ -181,8 +201,8 @@ EM framework::
 
   -> drivers/cpufreq/foo_cpufreq.c
 
-  01	static int est_power(unsigned long *mW, unsigned long *KHz,
+  01	static int est_power(struct device *dev, unsigned long *mW,
-  02			struct device *dev)
+  02			unsigned long *KHz)
   03	{
   04		long freq, power;
   05

arch/arm64/kernel/smp.c

@@ -512,6 +512,7 @@ struct acpi_madt_generic_interrupt *acpi_cpu_get_madt_gicc(int cpu)
 {
 	return &cpu_madt_gicc[cpu];
 }
+EXPORT_SYMBOL_GPL(acpi_cpu_get_madt_gicc);
 
 /*
  * acpi_map_gic_cpu_interface - parse processor MADT entry

arch/x86/include/asm/msr-index.h

@@ -319,6 +319,7 @@
 
 /* Run Time Average Power Limiting (RAPL) Interface */
 
+#define MSR_VR_CURRENT_CONFIG	0x00000601
 #define MSR_RAPL_POWER_UNIT		0x00000606
 
 #define MSR_PKG_POWER_LIMIT		0x00000610

arch/x86/kernel/acpi/boot.c

@@ -1862,7 +1862,7 @@ int __acpi_release_global_lock(unsigned int *lock)
 
 void __init arch_reserve_mem_area(acpi_physical_address addr, size_t size)
 {
-	e820__range_add(addr, size, E820_TYPE_ACPI);
+	e820__range_add(addr, size, E820_TYPE_NVS);
 	e820__update_table_print();
 }
 

drivers/acpi/bus.c

@@ -278,6 +278,20 @@ bool osc_sb_apei_support_acked;
 bool osc_pc_lpi_support_confirmed;
 EXPORT_SYMBOL_GPL(osc_pc_lpi_support_confirmed);
 
+/*
+ * ACPI 6.2 Section 6.2.11.2 'Platform-Wide OSPM Capabilities':
+ *   Starting with ACPI Specification 6.2, all _CPC registers can be in
+ *   PCC, System Memory, System IO, or Functional Fixed Hardware address
+ *   spaces. OSPM support for this more flexible register space scheme is
+ *   indicated by the “Flexible Address Space for CPPC Registers” _OSC bit.
+ *
+ * Otherwise (cf ACPI 6.1, s8.4.7.1.1.X), _CPC registers must be in:
+ * - PCC or Functional Fixed Hardware address space if defined
+ * - SystemMemory address space (NULL register) if not defined
+ */
+bool osc_cpc_flexible_adr_space_confirmed;
+EXPORT_SYMBOL_GPL(osc_cpc_flexible_adr_space_confirmed);
+
 /*
  * ACPI 6.4 Operating System Capabilities for USB.
  */
@@ -315,12 +329,15 @@ static void acpi_bus_osc_negotiate_platform_control(void)
 #endif
 #ifdef CONFIG_X86
 	capbuf[OSC_SUPPORT_DWORD] |= OSC_SB_GENERIC_INITIATOR_SUPPORT;
-	if (boot_cpu_has(X86_FEATURE_HWP)) {
+#endif
+
+#ifdef CONFIG_ACPI_CPPC_LIB
 	capbuf[OSC_SUPPORT_DWORD] |= OSC_SB_CPC_SUPPORT;
 	capbuf[OSC_SUPPORT_DWORD] |= OSC_SB_CPCV2_SUPPORT;
-	}
 #endif
 
+	capbuf[OSC_SUPPORT_DWORD] |= OSC_SB_CPC_FLEXIBLE_ADR_SPACE;
+
 	if (IS_ENABLED(CONFIG_SCHED_MC_PRIO))
 		capbuf[OSC_SUPPORT_DWORD] |= OSC_SB_CPC_DIVERSE_HIGH_SUPPORT;
 
@@ -341,8 +358,7 @@ static void acpi_bus_osc_negotiate_platform_control(void)
 		return;
 	}
 
-#ifdef CONFIG_X86
+#ifdef CONFIG_ACPI_CPPC_LIB
-	if (boot_cpu_has(X86_FEATURE_HWP))
 	osc_sb_cppc_not_supported = !(capbuf_ret[OSC_SUPPORT_DWORD] &
 			(OSC_SB_CPC_SUPPORT | OSC_SB_CPCV2_SUPPORT));
 #endif
@@ -366,6 +382,8 @@ static void acpi_bus_osc_negotiate_platform_control(void)
 			capbuf_ret[OSC_SUPPORT_DWORD] & OSC_SB_PCLPI_SUPPORT;
 		osc_sb_native_usb4_support_confirmed =
 			capbuf_ret[OSC_SUPPORT_DWORD] & OSC_SB_NATIVE_USB4_SUPPORT;
+		osc_cpc_flexible_adr_space_confirmed =
+			capbuf_ret[OSC_SUPPORT_DWORD] & OSC_SB_CPC_FLEXIBLE_ADR_SPACE;
 	}
 
 	kfree(context.ret.pointer);

drivers/acpi/cppc_acpi.c

@@ -100,6 +100,16 @@ static DEFINE_PER_CPU(struct cpc_desc *, cpc_desc_ptr);
 				(cpc)->cpc_entry.reg.space_id ==	\
 				ACPI_ADR_SPACE_PLATFORM_COMM)
 
+/* Check if a CPC register is in SystemMemory */
+#define CPC_IN_SYSTEM_MEMORY(cpc) ((cpc)->type == ACPI_TYPE_BUFFER &&	\
+				(cpc)->cpc_entry.reg.space_id ==	\
+				ACPI_ADR_SPACE_SYSTEM_MEMORY)
+
+/* Check if a CPC register is in SystemIo */
+#define CPC_IN_SYSTEM_IO(cpc) ((cpc)->type == ACPI_TYPE_BUFFER &&	\
+				(cpc)->cpc_entry.reg.space_id ==	\
+				ACPI_ADR_SPACE_SYSTEM_IO)
+
 /* Evaluates to True if reg is a NULL register descriptor */
 #define IS_NULL_REG(reg) ((reg)->space_id ==  ACPI_ADR_SPACE_SYSTEM_MEMORY && \
 				(reg)->address == 0 &&			\
@@ -424,6 +434,24 @@ bool acpi_cpc_valid(void)
 }
 EXPORT_SYMBOL_GPL(acpi_cpc_valid);
 
+bool cppc_allow_fast_switch(void)
+{
+	struct cpc_register_resource *desired_reg;
+	struct cpc_desc *cpc_ptr;
+	int cpu;
+
+	for_each_possible_cpu(cpu) {
+		cpc_ptr = per_cpu(cpc_desc_ptr, cpu);
+		desired_reg = &cpc_ptr->cpc_regs[DESIRED_PERF];
+		if (!CPC_IN_SYSTEM_MEMORY(desired_reg) &&
+				!CPC_IN_SYSTEM_IO(desired_reg))
+			return false;
+	}
+
+	return true;
+}
+EXPORT_SYMBOL_GPL(cppc_allow_fast_switch);
+
 /**
  * acpi_get_psd_map - Map the CPUs in the freq domain of a given cpu
  * @cpu: Find all CPUs that share a domain with cpu.
@@ -736,6 +764,11 @@ int acpi_cppc_processor_probe(struct acpi_processor *pr)
 				if (gas_t->address) {
 					void __iomem *addr;
 
+					if (!osc_cpc_flexible_adr_space_confirmed) {
+						pr_debug("Flexible address space capability not supported\n");
+						goto out_free;
+					}
+
 					addr = ioremap(gas_t->address, gas_t->bit_width/8);
 					if (!addr)
 						goto out_free;
@@ -758,6 +791,10 @@ int acpi_cppc_processor_probe(struct acpi_processor *pr)
 						 gas_t->address);
 					goto out_free;
 				}
+				if (!osc_cpc_flexible_adr_space_confirmed) {
+					pr_debug("Flexible address space capability not supported\n");
+					goto out_free;
+				}
 			} else {
 				if (gas_t->space_id != ACPI_ADR_SPACE_FIXED_HARDWARE || !cpc_ffh_supported()) {
 					/* Support only PCC, SystemMemory, SystemIO, and FFH type regs. */
@@ -1447,6 +1484,9 @@ EXPORT_SYMBOL_GPL(cppc_set_perf);
  * transition latency for performance change requests. The closest we have
  * is the timing information from the PCCT tables which provides the info
  * on the number and frequency of PCC commands the platform can handle.
+ *
+ * If desired_reg is in the SystemMemory or SystemIo ACPI address space,
+ * then assume there is no latency.
  */
 unsigned int cppc_get_transition_latency(int cpu_num)
 {
@@ -1472,7 +1512,9 @@ unsigned int cppc_get_transition_latency(int cpu_num)
 		return CPUFREQ_ETERNAL;
 
 	desired_reg = &cpc_desc->cpc_regs[DESIRED_PERF];
-	if (!CPC_IN_PCC(desired_reg))
+	if (CPC_IN_SYSTEM_MEMORY(desired_reg) || CPC_IN_SYSTEM_IO(desired_reg))
+		return 0;
+	else if (!CPC_IN_PCC(desired_reg))
 		return CPUFREQ_ETERNAL;
 
 	if (pcc_ss_id < 0)

drivers/base/power/common.c

@@ -172,10 +172,10 @@ EXPORT_SYMBOL_GPL(dev_pm_domain_attach_by_name);
  * @dev: Device to detach.
  * @power_off: Used to indicate whether we should power off the device.
  *
- * This functions will reverse the actions from dev_pm_domain_attach() and
+ * This functions will reverse the actions from dev_pm_domain_attach(),
- * dev_pm_domain_attach_by_id(), thus it detaches @dev from its PM domain.
+ * dev_pm_domain_attach_by_id() and dev_pm_domain_attach_by_name(), thus it
- * Typically it should be invoked during the remove phase, either from
+ * detaches @dev from its PM domain.  Typically it should be invoked during the
- * subsystem level code or from drivers.
+ * remove phase, either from subsystem level code or from drivers.
  *
  * Callers must ensure proper synchronization of this function with power
  * management callbacks.

drivers/base/power/domain.c

@@ -131,7 +131,7 @@ static const struct genpd_lock_ops genpd_spin_ops = {
 #define genpd_is_cpu_domain(genpd)	(genpd->flags & GENPD_FLAG_CPU_DOMAIN)
 #define genpd_is_rpm_always_on(genpd)	(genpd->flags & GENPD_FLAG_RPM_ALWAYS_ON)
 
-static inline bool irq_safe_dev_in_no_sleep_domain(struct device *dev,
+static inline bool irq_safe_dev_in_sleep_domain(struct device *dev,
 		const struct generic_pm_domain *genpd)
 {
 	bool ret;
@@ -139,11 +139,14 @@ static inline bool irq_safe_dev_in_no_sleep_domain(struct device *dev,
 	ret = pm_runtime_is_irq_safe(dev) && !genpd_is_irq_safe(genpd);
 
 	/*
-	 * Warn once if an IRQ safe device is attached to a no sleep domain, as
+	 * Warn once if an IRQ safe device is attached to a domain, which
-	 * to indicate a suboptimal configuration for PM. For an always on
+	 * callbacks are allowed to sleep. This indicates a suboptimal
-	 * domain this isn't case, thus don't warn.
+	 * configuration for PM, but it doesn't matter for an always on domain.
 	 */
-	if (ret && !genpd_is_always_on(genpd))
+	if (genpd_is_always_on(genpd) || genpd_is_rpm_always_on(genpd))
+		return ret;
+
+	if (ret)
 		dev_warn_once(dev, "PM domain %s will not be powered off\n",
 				genpd->name);
 
@@ -225,24 +228,23 @@ static void genpd_debug_remove(struct generic_pm_domain *genpd)
 
 static void genpd_update_accounting(struct generic_pm_domain *genpd)
 {
-	ktime_t delta, now;
+	u64 delta, now;
 
-	now = ktime_get();
+	now = ktime_get_mono_fast_ns();
-	delta = ktime_sub(now, genpd->accounting_time);
+	if (now <= genpd->accounting_time)
+		return;
+
+	delta = now - genpd->accounting_time;
 
 	/*
 	 * If genpd->status is active, it means we are just
 	 * out of off and so update the idle time and vice
 	 * versa.
 	 */
-	if (genpd->status == GENPD_STATE_ON) {
+	if (genpd->status == GENPD_STATE_ON)
-		int state_idx = genpd->state_idx;
+		genpd->states[genpd->state_idx].idle_time += delta;
-
+	else
-		genpd->states[state_idx].idle_time =
+		genpd->on_time += delta;
-			ktime_add(genpd->states[state_idx].idle_time, delta);
-	} else {
-		genpd->on_time = ktime_add(genpd->on_time, delta);
-	}
 
 	genpd->accounting_time = now;
 }
@@ -476,15 +478,16 @@ EXPORT_SYMBOL_GPL(dev_pm_genpd_set_performance_state);
  */
 void dev_pm_genpd_set_next_wakeup(struct device *dev, ktime_t next)
 {
-	struct generic_pm_domain_data *gpd_data;
 	struct generic_pm_domain *genpd;
+	struct gpd_timing_data *td;
 
 	genpd = dev_to_genpd_safe(dev);
 	if (!genpd)
 		return;
 
-	gpd_data = to_gpd_data(dev->power.subsys_data->domain_data);
+	td = to_gpd_data(dev->power.subsys_data->domain_data)->td;
-	gpd_data->next_wakeup = next;
+	if (td)
+		td->next_wakeup = next;
 }
 EXPORT_SYMBOL_GPL(dev_pm_genpd_set_next_wakeup);
 
@@ -506,6 +509,7 @@ static int _genpd_power_on(struct generic_pm_domain *genpd, bool timed)
 	if (!genpd->power_on)
 		goto out;
 
+	timed = timed && genpd->gd && !genpd->states[state_idx].fwnode;
 	if (!timed) {
 		ret = genpd->power_on(genpd);
 		if (ret)
@@ -524,7 +528,7 @@ static int _genpd_power_on(struct generic_pm_domain *genpd, bool timed)
 		goto out;
 
 	genpd->states[state_idx].power_on_latency_ns = elapsed_ns;
-	genpd->max_off_time_changed = true;
+	genpd->gd->max_off_time_changed = true;
 	pr_debug("%s: Power-%s latency exceeded, new value %lld ns\n",
 		 genpd->name, "on", elapsed_ns);
 
@@ -555,6 +559,7 @@ static int _genpd_power_off(struct generic_pm_domain *genpd, bool timed)
 	if (!genpd->power_off)
 		goto out;
 
+	timed = timed && genpd->gd && !genpd->states[state_idx].fwnode;
 	if (!timed) {
 		ret = genpd->power_off(genpd);
 		if (ret)
@@ -573,7 +578,7 @@ static int _genpd_power_off(struct generic_pm_domain *genpd, bool timed)
 		goto out;
 
 	genpd->states[state_idx].power_off_latency_ns = elapsed_ns;
-	genpd->max_off_time_changed = true;
+	genpd->gd->max_off_time_changed = true;
 	pr_debug("%s: Power-%s latency exceeded, new value %lld ns\n",
 		 genpd->name, "off", elapsed_ns);
 
@@ -649,18 +654,12 @@ static int genpd_power_off(struct generic_pm_domain *genpd, bool one_dev_on,
 	}
 
 	list_for_each_entry(pdd, &genpd->dev_list, list_node) {
-		enum pm_qos_flags_status stat;
-
-		stat = dev_pm_qos_flags(pdd->dev, PM_QOS_FLAG_NO_POWER_OFF);
-		if (stat > PM_QOS_FLAGS_NONE)
-			return -EBUSY;
-
 		/*
 		 * Do not allow PM domain to be powered off, when an IRQ safe
 		 * device is part of a non-IRQ safe domain.
 		 */
 		if (!pm_runtime_suspended(pdd->dev) ||
-			irq_safe_dev_in_no_sleep_domain(pdd->dev, genpd))
+			irq_safe_dev_in_sleep_domain(pdd->dev, genpd))
 			not_suspended++;
 	}
 
@@ -775,25 +774,27 @@ static int genpd_dev_pm_qos_notifier(struct notifier_block *nb,
 	dev = gpd_data->base.dev;
 
 	for (;;) {
-		struct generic_pm_domain *genpd;
+		struct generic_pm_domain *genpd = ERR_PTR(-ENODATA);
 		struct pm_domain_data *pdd;
+		struct gpd_timing_data *td;
 
 		spin_lock_irq(&dev->power.lock);
 
 		pdd = dev->power.subsys_data ?
 				dev->power.subsys_data->domain_data : NULL;
 		if (pdd) {
-			to_gpd_data(pdd)->td.constraint_changed = true;
+			td = to_gpd_data(pdd)->td;
+			if (td) {
+				td->constraint_changed = true;
 				genpd = dev_to_genpd(dev);
-		} else {
+			}
-			genpd = ERR_PTR(-ENODATA);
 		}
 
 		spin_unlock_irq(&dev->power.lock);
 
 		if (!IS_ERR(genpd)) {
 			genpd_lock(genpd);
-			genpd->max_off_time_changed = true;
+			genpd->gd->max_off_time_changed = true;
 			genpd_unlock(genpd);
 		}
 
@@ -879,9 +880,9 @@ static int genpd_runtime_suspend(struct device *dev)
 	struct generic_pm_domain *genpd;
 	bool (*suspend_ok)(struct device *__dev);
 	struct generic_pm_domain_data *gpd_data = dev_gpd_data(dev);
-	struct gpd_timing_data *td = &gpd_data->td;
+	struct gpd_timing_data *td = gpd_data->td;
 	bool runtime_pm = pm_runtime_enabled(dev);
-	ktime_t time_start;
+	ktime_t time_start = 0;
 	s64 elapsed_ns;
 	int ret;
 
@@ -902,8 +903,7 @@ static int genpd_runtime_suspend(struct device *dev)
 		return -EBUSY;
 
 	/* Measure suspend latency. */
-	time_start = 0;
+	if (td && runtime_pm)
-	if (runtime_pm)
 		time_start = ktime_get();
 
 	ret = __genpd_runtime_suspend(dev);
@@ -917,13 +917,13 @@ static int genpd_runtime_suspend(struct device *dev)
 	}
 
 	/* Update suspend latency value if the measured time exceeds it. */
-	if (runtime_pm) {
+	if (td && runtime_pm) {
 		elapsed_ns = ktime_to_ns(ktime_sub(ktime_get(), time_start));
 		if (elapsed_ns > td->suspend_latency_ns) {
 			td->suspend_latency_ns = elapsed_ns;
 			dev_dbg(dev, "suspend latency exceeded, %lld ns\n",
 				elapsed_ns);
-			genpd->max_off_time_changed = true;
+			genpd->gd->max_off_time_changed = true;
 			td->constraint_changed = true;
 		}
 	}
@@ -932,7 +932,7 @@ static int genpd_runtime_suspend(struct device *dev)
 	 * If power.irq_safe is set, this routine may be run with
 	 * IRQs disabled, so suspend only if the PM domain also is irq_safe.
 	 */
-	if (irq_safe_dev_in_no_sleep_domain(dev, genpd))
+	if (irq_safe_dev_in_sleep_domain(dev, genpd))
 		return 0;
 
 	genpd_lock(genpd);
@@ -955,12 +955,11 @@ static int genpd_runtime_resume(struct device *dev)
 {
 	struct generic_pm_domain *genpd;
 	struct generic_pm_domain_data *gpd_data = dev_gpd_data(dev);
-	struct gpd_timing_data *td = &gpd_data->td;
+	struct gpd_timing_data *td = gpd_data->td;
-	bool runtime_pm = pm_runtime_enabled(dev);
+	bool timed = td && pm_runtime_enabled(dev);
-	ktime_t time_start;
+	ktime_t time_start = 0;
 	s64 elapsed_ns;
 	int ret;
-	bool timed = true;
 
 	dev_dbg(dev, "%s()\n", __func__);
 
@@ -972,10 +971,8 @@ static int genpd_runtime_resume(struct device *dev)
 	 * As we don't power off a non IRQ safe domain, which holds
 	 * an IRQ safe device, we don't need to restore power to it.
 	 */
-	if (irq_safe_dev_in_no_sleep_domain(dev, genpd)) {
+	if (irq_safe_dev_in_sleep_domain(dev, genpd))
-		timed = false;
 		goto out;
-	}
 
 	genpd_lock(genpd);
 	ret = genpd_power_on(genpd, 0);
@@ -988,8 +985,7 @@ static int genpd_runtime_resume(struct device *dev)
 
  out:
 	/* Measure resume latency. */
-	time_start = 0;
+	if (timed)
-	if (timed && runtime_pm)
 		time_start = ktime_get();
 
 	ret = genpd_start_dev(genpd, dev);
@@ -1001,13 +997,13 @@ static int genpd_runtime_resume(struct device *dev)
 		goto err_stop;
 
 	/* Update resume latency value if the measured time exceeds it. */
-	if (timed && runtime_pm) {
+	if (timed) {
 		elapsed_ns = ktime_to_ns(ktime_sub(ktime_get(), time_start));
 		if (elapsed_ns > td->resume_latency_ns) {
 			td->resume_latency_ns = elapsed_ns;
 			dev_dbg(dev, "resume latency exceeded, %lld ns\n",
 				elapsed_ns);
-			genpd->max_off_time_changed = true;
+			genpd->gd->max_off_time_changed = true;
 			td->constraint_changed = true;
 		}
 	}
@@ -1500,9 +1496,11 @@ EXPORT_SYMBOL_GPL(dev_pm_genpd_resume);
 
 #endif /* CONFIG_PM_SLEEP */
 
-static struct generic_pm_domain_data *genpd_alloc_dev_data(struct device *dev)
+static struct generic_pm_domain_data *genpd_alloc_dev_data(struct device *dev,
+							   bool has_governor)
 {
 	struct generic_pm_domain_data *gpd_data;
+	struct gpd_timing_data *td;
 	int ret;
 
 	ret = dev_pm_get_subsys_data(dev);
@@ -1516,26 +1514,38 @@ static struct generic_pm_domain_data *genpd_alloc_dev_data(struct device *dev)
 	}
 
 	gpd_data->base.dev = dev;
-	gpd_data->td.constraint_changed = true;
-	gpd_data->td.effective_constraint_ns = PM_QOS_RESUME_LATENCY_NO_CONSTRAINT_NS;
 	gpd_data->nb.notifier_call = genpd_dev_pm_qos_notifier;
-	gpd_data->next_wakeup = KTIME_MAX;
 
-	spin_lock_irq(&dev->power.lock);
+	/* Allocate data used by a governor. */
-
+	if (has_governor) {
-	if (dev->power.subsys_data->domain_data) {
+		td = kzalloc(sizeof(*td), GFP_KERNEL);
-		ret = -EINVAL;
+		if (!td) {
+			ret = -ENOMEM;
 			goto err_free;
 		}
 
+		td->constraint_changed = true;
+		td->effective_constraint_ns = PM_QOS_RESUME_LATENCY_NO_CONSTRAINT_NS;
+		td->next_wakeup = KTIME_MAX;
+		gpd_data->td = td;
+	}
+
+	spin_lock_irq(&dev->power.lock);
+
+	if (dev->power.subsys_data->domain_data)
+		ret = -EINVAL;
+	else
 		dev->power.subsys_data->domain_data = &gpd_data->base;
 
 	spin_unlock_irq(&dev->power.lock);
 
+	if (ret)
+		goto err_free;
+
 	return gpd_data;
 
  err_free:
-	spin_unlock_irq(&dev->power.lock);
+	kfree(gpd_data->td);
 	kfree(gpd_data);
  err_put:
 	dev_pm_put_subsys_data(dev);
@@ -1551,6 +1561,7 @@ static void genpd_free_dev_data(struct device *dev,
 
 	spin_unlock_irq(&dev->power.lock);
 
+	kfree(gpd_data->td);
 	kfree(gpd_data);
 	dev_pm_put_subsys_data(dev);
 }
@@ -1607,6 +1618,7 @@ static int genpd_get_cpu(struct generic_pm_domain *genpd, struct device *dev)
 static int genpd_add_device(struct generic_pm_domain *genpd, struct device *dev,
 			    struct device *base_dev)
 {
+	struct genpd_governor_data *gd = genpd->gd;
 	struct generic_pm_domain_data *gpd_data;
 	int ret;
 
@@ -1615,7 +1627,7 @@ static int genpd_add_device(struct generic_pm_domain *genpd, struct device *dev,
 	if (IS_ERR_OR_NULL(genpd) || IS_ERR_OR_NULL(dev))
 		return -EINVAL;
 
-	gpd_data = genpd_alloc_dev_data(dev);
+	gpd_data = genpd_alloc_dev_data(dev, gd);
 	if (IS_ERR(gpd_data))
 		return PTR_ERR(gpd_data);
 
@@ -1631,7 +1643,8 @@ static int genpd_add_device(struct generic_pm_domain *genpd, struct device *dev,
 	dev_pm_domain_set(dev, &genpd->domain);
 
 	genpd->device_count++;
-	genpd->max_off_time_changed = true;
+	if (gd)
+		gd->max_off_time_changed = true;
 
 	list_add_tail(&gpd_data->base.list_node, &genpd->dev_list);
 
@@ -1685,7 +1698,8 @@ static int genpd_remove_device(struct generic_pm_domain *genpd,
 	}
 
 	genpd->device_count--;
-	genpd->max_off_time_changed = true;
+	if (genpd->gd)
+		genpd->gd->max_off_time_changed = true;
 
 	genpd_clear_cpumask(genpd, gpd_data->cpu);
 	dev_pm_domain_set(dev, NULL);
@@ -1958,6 +1972,53 @@ static int genpd_set_default_power_state(struct generic_pm_domain *genpd)
 	return 0;
 }
 
+static int genpd_alloc_data(struct generic_pm_domain *genpd)
+{
+	struct genpd_governor_data *gd = NULL;
+	int ret;
+
+	if (genpd_is_cpu_domain(genpd) &&
+	    !zalloc_cpumask_var(&genpd->cpus, GFP_KERNEL))
+		return -ENOMEM;
+
+	if (genpd->gov) {
+		gd = kzalloc(sizeof(*gd), GFP_KERNEL);
+		if (!gd) {
+			ret = -ENOMEM;
+			goto free;
+		}
+
+		gd->max_off_time_ns = -1;
+		gd->max_off_time_changed = true;
+		gd->next_wakeup = KTIME_MAX;
+	}
+
+	/* Use only one "off" state if there were no states declared */
+	if (genpd->state_count == 0) {
+		ret = genpd_set_default_power_state(genpd);
+		if (ret)
+			goto free;
+	}
+
+	genpd->gd = gd;
+	return 0;
+
+free:
+	if (genpd_is_cpu_domain(genpd))
+		free_cpumask_var(genpd->cpus);
+	kfree(gd);
+	return ret;
+}
+
+static void genpd_free_data(struct generic_pm_domain *genpd)
+{
+	if (genpd_is_cpu_domain(genpd))
+		free_cpumask_var(genpd->cpus);
+	if (genpd->free_states)
+		genpd->free_states(genpd->states, genpd->state_count);
+	kfree(genpd->gd);
+}
+
 static void genpd_lock_init(struct generic_pm_domain *genpd)
 {
 	if (genpd->flags & GENPD_FLAG_IRQ_SAFE) {
@@ -1995,11 +2056,9 @@ int pm_genpd_init(struct generic_pm_domain *genpd,
 	atomic_set(&genpd->sd_count, 0);
 	genpd->status = is_off ? GENPD_STATE_OFF : GENPD_STATE_ON;
 	genpd->device_count = 0;
-	genpd->max_off_time_ns = -1;
-	genpd->max_off_time_changed = true;
 	genpd->provider = NULL;
 	genpd->has_provider = false;
-	genpd->accounting_time = ktime_get();
+	genpd->accounting_time = ktime_get_mono_fast_ns();
 	genpd->domain.ops.runtime_suspend = genpd_runtime_suspend;
 	genpd->domain.ops.runtime_resume = genpd_runtime_resume;
 	genpd->domain.ops.prepare = genpd_prepare;
@@ -2017,26 +2076,22 @@ int pm_genpd_init(struct generic_pm_domain *genpd,
 		genpd->dev_ops.start = pm_clk_resume;
 	}
 
+	/* The always-on governor works better with the corresponding flag. */
+	if (gov == &pm_domain_always_on_gov)
+		genpd->flags |= GENPD_FLAG_RPM_ALWAYS_ON;
+
 	/* Always-on domains must be powered on at initialization. */
 	if ((genpd_is_always_on(genpd) || genpd_is_rpm_always_on(genpd)) &&
 			!genpd_status_on(genpd))
 		return -EINVAL;
 
-	if (genpd_is_cpu_domain(genpd) &&
+	/* Multiple states but no governor doesn't make sense. */
-	    !zalloc_cpumask_var(&genpd->cpus, GFP_KERNEL))
+	if (!gov && genpd->state_count > 1)
-		return -ENOMEM;
-
-	/* Use only one "off" state if there were no states declared */
-	if (genpd->state_count == 0) {
-		ret = genpd_set_default_power_state(genpd);
-		if (ret) {
-			if (genpd_is_cpu_domain(genpd))
-				free_cpumask_var(genpd->cpus);
-			return ret;
-		}
-	} else if (!gov && genpd->state_count > 1) {
 		pr_warn("%s: no governor for states\n", genpd->name);
-	}
+
+	ret = genpd_alloc_data(genpd);
+	if (ret)
+		return ret;
 
 	device_initialize(&genpd->dev);
 	dev_set_name(&genpd->dev, "%s", genpd->name);
@@ -2081,10 +2136,7 @@ static int genpd_remove(struct generic_pm_domain *genpd)
 	genpd_unlock(genpd);
 	genpd_debug_remove(genpd);
 	cancel_work_sync(&genpd->power_off_work);
-	if (genpd_is_cpu_domain(genpd))
+	genpd_free_data(genpd);
-		free_cpumask_var(genpd->cpus);
-	if (genpd->free_states)
-		genpd->free_states(genpd->states, genpd->state_count);
 
 	pr_debug("%s: removed %s\n", __func__, genpd->name);
 
@@ -3163,6 +3215,7 @@ static int sub_domains_show(struct seq_file *s, void *data)
 static int idle_states_show(struct seq_file *s, void *data)
 {
 	struct generic_pm_domain *genpd = s->private;
+	u64 now, delta, idle_time = 0;
 	unsigned int i;
 	int ret = 0;
 
@@ -3173,16 +3226,18 @@ static int idle_states_show(struct seq_file *s, void *data)
 	seq_puts(s, "State          Time Spent(ms) Usage          Rejected\n");
 
 	for (i = 0; i < genpd->state_count; i++) {
-		ktime_t delta = 0;
+		idle_time += genpd->states[i].idle_time;
-		s64 msecs;
 
-		if ((genpd->status == GENPD_STATE_OFF) &&
+		if (genpd->status == GENPD_STATE_OFF && genpd->state_idx == i) {
-				(genpd->state_idx == i))
+			now = ktime_get_mono_fast_ns();
-			delta = ktime_sub(ktime_get(), genpd->accounting_time);
+			if (now > genpd->accounting_time) {
+				delta = now - genpd->accounting_time;
+				idle_time += delta;
+			}
+		}
 
-		msecs = ktime_to_ms(
+		do_div(idle_time, NSEC_PER_MSEC);
-			ktime_add(genpd->states[i].idle_time, delta));
+		seq_printf(s, "S%-13i %-14llu %-14llu %llu\n", i, idle_time,
-		seq_printf(s, "S%-13i %-14lld %-14llu %llu\n", i, msecs,
 			   genpd->states[i].usage, genpd->states[i].rejected);
 	}
 
@@ -3193,18 +3248,22 @@ static int idle_states_show(struct seq_file *s, void *data)
 static int active_time_show(struct seq_file *s, void *data)
 {
 	struct generic_pm_domain *genpd = s->private;
-	ktime_t delta = 0;
+	u64 now, on_time, delta = 0;
 	int ret = 0;
 
 	ret = genpd_lock_interruptible(genpd);
 	if (ret)
 		return -ERESTARTSYS;
 
-	if (genpd->status == GENPD_STATE_ON)
+	if (genpd->status == GENPD_STATE_ON) {
-		delta = ktime_sub(ktime_get(), genpd->accounting_time);
+		now = ktime_get_mono_fast_ns();
+		if (now > genpd->accounting_time)
+			delta = now - genpd->accounting_time;
+	}
 
-	seq_printf(s, "%lld ms\n", ktime_to_ms(
+	on_time = genpd->on_time + delta;
-				ktime_add(genpd->on_time, delta)));
+	do_div(on_time, NSEC_PER_MSEC);
+	seq_printf(s, "%llu ms\n", on_time);
 
 	genpd_unlock(genpd);
 	return ret;
@@ -3213,7 +3272,7 @@ static int active_time_show(struct seq_file *s, void *data)
 static int total_idle_time_show(struct seq_file *s, void *data)
 {
 	struct generic_pm_domain *genpd = s->private;
-	ktime_t delta = 0, total = 0;
+	u64 now, delta, total = 0;
 	unsigned int i;
 	int ret = 0;
 
@@ -3222,16 +3281,19 @@ static int total_idle_time_show(struct seq_file *s, void *data)
 		return -ERESTARTSYS;
 
 	for (i = 0; i < genpd->state_count; i++) {
+		total += genpd->states[i].idle_time;
 
-		if ((genpd->status == GENPD_STATE_OFF) &&
+		if (genpd->status == GENPD_STATE_OFF && genpd->state_idx == i) {
-				(genpd->state_idx == i))
+			now = ktime_get_mono_fast_ns();
-			delta = ktime_sub(ktime_get(), genpd->accounting_time);
+			if (now > genpd->accounting_time) {
-
+				delta = now - genpd->accounting_time;
-		total = ktime_add(total, genpd->states[i].idle_time);
+				total += delta;
+			}
+		}
 	}
-	total = ktime_add(total, delta);
 
-	seq_printf(s, "%lld ms\n", ktime_to_ms(total));
+	do_div(total, NSEC_PER_MSEC);
+	seq_printf(s, "%llu ms\n", total);
 
 	genpd_unlock(genpd);
 	return ret;

drivers/base/power/domain_governor.c

@@ -18,6 +18,8 @@ static int dev_update_qos_constraint(struct device *dev, void *data)
 	s64 constraint_ns;
 
 	if (dev->power.subsys_data && dev->power.subsys_data->domain_data) {
+		struct gpd_timing_data *td = dev_gpd_data(dev)->td;
+
 		/*
 		 * Only take suspend-time QoS constraints of devices into
 		 * account, because constraints updated after the device has
@@ -25,7 +27,8 @@ static int dev_update_qos_constraint(struct device *dev, void *data)
 		 * anyway.  In order for them to take effect, the device has to
 		 * be resumed and suspended again.
 		 */
-		constraint_ns = dev_gpd_data(dev)->td.effective_constraint_ns;
+		constraint_ns = td ? td->effective_constraint_ns :
+				PM_QOS_RESUME_LATENCY_NO_CONSTRAINT_NS;
 	} else {
 		/*
 		 * The child is not in a domain and there's no info on its
@@ -49,7 +52,7 @@ static int dev_update_qos_constraint(struct device *dev, void *data)
  */
 static bool default_suspend_ok(struct device *dev)
 {
-	struct gpd_timing_data *td = &dev_gpd_data(dev)->td;
+	struct gpd_timing_data *td = dev_gpd_data(dev)->td;
 	unsigned long flags;
 	s64 constraint_ns;
 
@@ -136,26 +139,28 @@ static void update_domain_next_wakeup(struct generic_pm_domain *genpd, ktime_t n
 	 * is able to enter its optimal idle state.
 	 */
 	list_for_each_entry(pdd, &genpd->dev_list, list_node) {
-		next_wakeup = to_gpd_data(pdd)->next_wakeup;
+		next_wakeup = to_gpd_data(pdd)->td->next_wakeup;
 		if (next_wakeup != KTIME_MAX && !ktime_before(next_wakeup, now))
 			if (ktime_before(next_wakeup, domain_wakeup))
 				domain_wakeup = next_wakeup;
 	}
 
 	list_for_each_entry(link, &genpd->parent_links, parent_node) {
-		next_wakeup = link->child->next_wakeup;
+		struct genpd_governor_data *cgd = link->child->gd;
+
+		next_wakeup = cgd ? cgd->next_wakeup : KTIME_MAX;
 		if (next_wakeup != KTIME_MAX && !ktime_before(next_wakeup, now))
 			if (ktime_before(next_wakeup, domain_wakeup))
 				domain_wakeup = next_wakeup;
 	}
 
-	genpd->next_wakeup = domain_wakeup;
+	genpd->gd->next_wakeup = domain_wakeup;
 }
 
 static bool next_wakeup_allows_state(struct generic_pm_domain *genpd,
 				     unsigned int state, ktime_t now)
 {
-	ktime_t domain_wakeup = genpd->next_wakeup;
+	ktime_t domain_wakeup = genpd->gd->next_wakeup;
 	s64 idle_time_ns, min_sleep_ns;
 
 	min_sleep_ns = genpd->states[state].power_off_latency_ns +
@@ -185,8 +190,9 @@ static bool __default_power_down_ok(struct dev_pm_domain *pd,
 	 * All subdomains have been powered off already at this point.
 	 */
 	list_for_each_entry(link, &genpd->parent_links, parent_node) {
-		struct generic_pm_domain *sd = link->child;
+		struct genpd_governor_data *cgd = link->child->gd;
-		s64 sd_max_off_ns = sd->max_off_time_ns;
+
+		s64 sd_max_off_ns = cgd ? cgd->max_off_time_ns : -1;
 
 		if (sd_max_off_ns < 0)
 			continue;
@@ -215,7 +221,7 @@ static bool __default_power_down_ok(struct dev_pm_domain *pd,
 		 * domain to turn off and on (that's how much time it will
 		 * have to wait worst case).
 		 */
-		td = &to_gpd_data(pdd)->td;
+		td = to_gpd_data(pdd)->td;
 		constraint_ns = td->effective_constraint_ns;
 		/*
 		 * Zero means "no suspend at all" and this runs only when all
@@ -244,7 +250,7 @@ static bool __default_power_down_ok(struct dev_pm_domain *pd,
 	 * time and the time needed to turn the domain on is the maximum
 	 * theoretical time this domain can spend in the "off" state.
 	 */
-	genpd->max_off_time_ns = min_off_time_ns -
+	genpd->gd->max_off_time_ns = min_off_time_ns -
 		genpd->states[state].power_on_latency_ns;
 	return true;
 }
@@ -259,6 +265,7 @@ static bool __default_power_down_ok(struct dev_pm_domain *pd,
 static bool _default_power_down_ok(struct dev_pm_domain *pd, ktime_t now)
 {
 	struct generic_pm_domain *genpd = pd_to_genpd(pd);
+	struct genpd_governor_data *gd = genpd->gd;
 	int state_idx = genpd->state_count - 1;
 	struct gpd_link *link;
 
@@ -269,11 +276,11 @@ static bool _default_power_down_ok(struct dev_pm_domain *pd, ktime_t now)
 	 * cannot be met.
 	 */
 	update_domain_next_wakeup(genpd, now);
-	if ((genpd->flags & GENPD_FLAG_MIN_RESIDENCY) && (genpd->next_wakeup != KTIME_MAX)) {
+	if ((genpd->flags & GENPD_FLAG_MIN_RESIDENCY) && (gd->next_wakeup != KTIME_MAX)) {
 		/* Let's find out the deepest domain idle state, the devices prefer */
 		while (state_idx >= 0) {
 			if (next_wakeup_allows_state(genpd, state_idx, now)) {
-				genpd->max_off_time_changed = true;
+				gd->max_off_time_changed = true;
 				break;
 			}
 			state_idx--;
@@ -281,14 +288,14 @@ static bool _default_power_down_ok(struct dev_pm_domain *pd, ktime_t now)
 
 		if (state_idx < 0) {
 			state_idx = 0;
-			genpd->cached_power_down_ok = false;
+			gd->cached_power_down_ok = false;
 			goto done;
 		}
 	}
 
-	if (!genpd->max_off_time_changed) {
+	if (!gd->max_off_time_changed) {
-		genpd->state_idx = genpd->cached_power_down_state_idx;
+		genpd->state_idx = gd->cached_power_down_state_idx;
-		return genpd->cached_power_down_ok;
+		return gd->cached_power_down_ok;
 	}
 
 	/*
@@ -297,12 +304,16 @@ static bool _default_power_down_ok(struct dev_pm_domain *pd, ktime_t now)
 	 * going to be called for any parent until this instance
 	 * returns.
 	 */
-	list_for_each_entry(link, &genpd->child_links, child_node)
+	list_for_each_entry(link, &genpd->child_links, child_node) {
-		link->parent->max_off_time_changed = true;
+		struct genpd_governor_data *pgd = link->parent->gd;
 
-	genpd->max_off_time_ns = -1;
+		if (pgd)
-	genpd->max_off_time_changed = false;
+			pgd->max_off_time_changed = true;
-	genpd->cached_power_down_ok = true;
+	}
+
+	gd->max_off_time_ns = -1;
+	gd->max_off_time_changed = false;
+	gd->cached_power_down_ok = true;
 
 	/*
 	 * Find a state to power down to, starting from the state
@@ -310,7 +321,7 @@ static bool _default_power_down_ok(struct dev_pm_domain *pd, ktime_t now)
 	 */
 	while (!__default_power_down_ok(pd, state_idx)) {
 		if (state_idx == 0) {
-			genpd->cached_power_down_ok = false;
+			gd->cached_power_down_ok = false;
 			break;
 		}
 		state_idx--;
@@ -318,8 +329,8 @@ static bool _default_power_down_ok(struct dev_pm_domain *pd, ktime_t now)
 
 done:
 	genpd->state_idx = state_idx;
-	genpd->cached_power_down_state_idx = genpd->state_idx;
+	gd->cached_power_down_state_idx = genpd->state_idx;
-	return genpd->cached_power_down_ok;
+	return gd->cached_power_down_ok;
 }
 
 static bool default_power_down_ok(struct dev_pm_domain *pd)
@@ -327,11 +338,6 @@ static bool default_power_down_ok(struct dev_pm_domain *pd)
 	return _default_power_down_ok(pd, ktime_get());
 }
 
-static bool always_on_power_down_ok(struct dev_pm_domain *domain)
-{
-	return false;
-}
-
 #ifdef CONFIG_CPU_IDLE
 static bool cpu_power_down_ok(struct dev_pm_domain *pd)
 {
@@ -401,6 +407,5 @@ struct dev_power_governor simple_qos_governor = {
  * pm_genpd_gov_always_on - A governor implementing an always-on policy
  */
 struct dev_power_governor pm_domain_always_on_gov = {
-	.power_down_ok = always_on_power_down_ok,
 	.suspend_ok = default_suspend_ok,
 };

drivers/base/power/runtime.c

@@ -263,7 +263,7 @@ static int rpm_check_suspend_allowed(struct device *dev)
 		retval = -EINVAL;
 	else if (dev->power.disable_depth > 0)
 		retval = -EACCES;
-	else if (atomic_read(&dev->power.usage_count) > 0)
+	else if (atomic_read(&dev->power.usage_count))
 		retval = -EAGAIN;
 	else if (!dev->power.ignore_children &&
 			atomic_read(&dev->power.child_count))
@@ -1039,13 +1039,33 @@ int pm_schedule_suspend(struct device *dev, unsigned int delay)
 }
 EXPORT_SYMBOL_GPL(pm_schedule_suspend);
 
+static int rpm_drop_usage_count(struct device *dev)
+{
+	int ret;
+
+	ret = atomic_sub_return(1, &dev->power.usage_count);
+	if (ret >= 0)
+		return ret;
+
+	/*
+	 * Because rpm_resume() does not check the usage counter, it will resume
+	 * the device even if the usage counter is 0 or negative, so it is
+	 * sufficient to increment the usage counter here to reverse the change
+	 * made above.
+	 */
+	atomic_inc(&dev->power.usage_count);
+	dev_warn(dev, "Runtime PM usage count underflow!\n");
+	return -EINVAL;
+}
+
 /**
  * __pm_runtime_idle - Entry point for runtime idle operations.
  * @dev: Device to send idle notification for.
  * @rpmflags: Flag bits.
  *
  * If the RPM_GET_PUT flag is set, decrement the device's usage count and
- * return immediately if it is larger than zero.  Then carry out an idle
+ * return immediately if it is larger than zero (if it becomes negative, log a
+ * warning, increment it, and return an error).  Then carry out an idle
  * notification, either synchronous or asynchronous.
  *
  * This routine may be called in atomic context if the RPM_ASYNC flag is set,
@@ -1057,7 +1077,10 @@ int __pm_runtime_idle(struct device *dev, int rpmflags)
 	int retval;
 
 	if (rpmflags & RPM_GET_PUT) {
-		if (!atomic_dec_and_test(&dev->power.usage_count)) {
+		retval = rpm_drop_usage_count(dev);
+		if (retval < 0) {
+			return retval;
+		} else if (retval > 0) {
 			trace_rpm_usage_rcuidle(dev, rpmflags);
 			return 0;
 		}
@@ -1079,7 +1102,8 @@ EXPORT_SYMBOL_GPL(__pm_runtime_idle);
  * @rpmflags: Flag bits.
  *
  * If the RPM_GET_PUT flag is set, decrement the device's usage count and
- * return immediately if it is larger than zero.  Then carry out a suspend,
+ * return immediately if it is larger than zero (if it becomes negative, log a
+ * warning, increment it, and return an error).  Then carry out a suspend,
  * either synchronous or asynchronous.
  *
  * This routine may be called in atomic context if the RPM_ASYNC flag is set,
@@ -1091,7 +1115,10 @@ int __pm_runtime_suspend(struct device *dev, int rpmflags)
 	int retval;
 
 	if (rpmflags & RPM_GET_PUT) {
-		if (!atomic_dec_and_test(&dev->power.usage_count)) {
+		retval = rpm_drop_usage_count(dev);
+		if (retval < 0) {
+			return retval;
+		} else if (retval > 0) {
 			trace_rpm_usage_rcuidle(dev, rpmflags);
 			return 0;
 		}
@@ -1210,12 +1237,13 @@ int __pm_runtime_set_status(struct device *dev, unsigned int status)
 {
 	struct device *parent = dev->parent;
 	bool notify_parent = false;
+	unsigned long flags;
 	int error = 0;
 
 	if (status != RPM_ACTIVE && status != RPM_SUSPENDED)
 		return -EINVAL;
 
-	spin_lock_irq(&dev->power.lock);
+	spin_lock_irqsave(&dev->power.lock, flags);
 
 	/*
 	 * Prevent PM-runtime from being enabled for the device or return an
@@ -1226,7 +1254,7 @@ int __pm_runtime_set_status(struct device *dev, unsigned int status)
 	else
 		error = -EAGAIN;
 
-	spin_unlock_irq(&dev->power.lock);
+	spin_unlock_irqrestore(&dev->power.lock, flags);
 
 	if (error)
 		return error;
@@ -1247,7 +1275,7 @@ int __pm_runtime_set_status(struct device *dev, unsigned int status)
 		device_links_read_unlock(idx);
 	}
 
-	spin_lock_irq(&dev->power.lock);
+	spin_lock_irqsave(&dev->power.lock, flags);
 
 	if (dev->power.runtime_status == status || !parent)
 		goto out_set;
@@ -1288,7 +1316,7 @@ int __pm_runtime_set_status(struct device *dev, unsigned int status)
 		dev->power.runtime_error = 0;
 
  out:
-	spin_unlock_irq(&dev->power.lock);
+	spin_unlock_irqrestore(&dev->power.lock, flags);
 
 	if (notify_parent)
 		pm_request_idle(parent);
@@ -1527,14 +1555,17 @@ EXPORT_SYMBOL_GPL(pm_runtime_forbid);
  */
 void pm_runtime_allow(struct device *dev)
 {
+	int ret;
+
 	spin_lock_irq(&dev->power.lock);
 	if (dev->power.runtime_auto)
 		goto out;
 
 	dev->power.runtime_auto = true;
-	if (atomic_dec_and_test(&dev->power.usage_count))
+	ret = rpm_drop_usage_count(dev);
+	if (ret == 0)
 		rpm_idle(dev, RPM_AUTO | RPM_ASYNC);
-	else
+	else if (ret > 0)
 		trace_rpm_usage_rcuidle(dev, RPM_AUTO | RPM_ASYNC);
 
  out:

drivers/cpufreq/cppc_cpufreq.c

@@ -389,6 +389,27 @@ static int cppc_cpufreq_set_target(struct cpufreq_policy *policy,
 	return ret;
 }
 
+static unsigned int cppc_cpufreq_fast_switch(struct cpufreq_policy *policy,
+					      unsigned int target_freq)
+{
+	struct cppc_cpudata *cpu_data = policy->driver_data;
+	unsigned int cpu = policy->cpu;
+	u32 desired_perf;
+	int ret;
+
+	desired_perf = cppc_cpufreq_khz_to_perf(cpu_data, target_freq);
+	cpu_data->perf_ctrls.desired_perf = desired_perf;
+	ret = cppc_set_perf(cpu, &cpu_data->perf_ctrls);
+
+	if (ret) {
+		pr_debug("Failed to set target on CPU:%d. ret:%d\n",
+			 cpu, ret);
+		return 0;
+	}
+
+	return target_freq;
+}
+
 static int cppc_verify_policy(struct cpufreq_policy_data *policy)
 {
 	cpufreq_verify_within_cpu_limits(policy);
@@ -420,12 +441,197 @@ static unsigned int cppc_cpufreq_get_transition_delay_us(unsigned int cpu)
 	return cppc_get_transition_latency(cpu) / NSEC_PER_USEC;
 }
 
+static DEFINE_PER_CPU(unsigned int, efficiency_class);
+static void cppc_cpufreq_register_em(struct cpufreq_policy *policy);
+
+/* Create an artificial performance state every CPPC_EM_CAP_STEP capacity unit. */
+#define CPPC_EM_CAP_STEP	(20)
+/* Increase the cost value by CPPC_EM_COST_STEP every performance state. */
+#define CPPC_EM_COST_STEP	(1)
+/* Add a cost gap correspnding to the energy of 4 CPUs. */
+#define CPPC_EM_COST_GAP	(4 * SCHED_CAPACITY_SCALE * CPPC_EM_COST_STEP \
+				/ CPPC_EM_CAP_STEP)
+
+static unsigned int get_perf_level_count(struct cpufreq_policy *policy)
+{
+	struct cppc_perf_caps *perf_caps;
+	unsigned int min_cap, max_cap;
+	struct cppc_cpudata *cpu_data;
+	int cpu = policy->cpu;
+
+	cpu_data = policy->driver_data;
+	perf_caps = &cpu_data->perf_caps;
+	max_cap = arch_scale_cpu_capacity(cpu);
+	min_cap = div_u64(max_cap * perf_caps->lowest_perf, perf_caps->highest_perf);
+	if ((min_cap == 0) || (max_cap < min_cap))
+		return 0;
+	return 1 + max_cap / CPPC_EM_CAP_STEP - min_cap / CPPC_EM_CAP_STEP;
+}
+
+/*
+ * The cost is defined as:
+ *   cost = power * max_frequency / frequency
+ */
+static inline unsigned long compute_cost(int cpu, int step)
+{
+	return CPPC_EM_COST_GAP * per_cpu(efficiency_class, cpu) +
+			step * CPPC_EM_COST_STEP;
+}
+
+static int cppc_get_cpu_power(struct device *cpu_dev,
+		unsigned long *power, unsigned long *KHz)
+{
+	unsigned long perf_step, perf_prev, perf, perf_check;
+	unsigned int min_step, max_step, step, step_check;
+	unsigned long prev_freq = *KHz;
+	unsigned int min_cap, max_cap;
+	struct cpufreq_policy *policy;
+
+	struct cppc_perf_caps *perf_caps;
+	struct cppc_cpudata *cpu_data;
+
+	policy = cpufreq_cpu_get_raw(cpu_dev->id);
+	cpu_data = policy->driver_data;
+	perf_caps = &cpu_data->perf_caps;
+	max_cap = arch_scale_cpu_capacity(cpu_dev->id);
+	min_cap = div_u64(max_cap * perf_caps->lowest_perf,
+			perf_caps->highest_perf);
+
+	perf_step = CPPC_EM_CAP_STEP * perf_caps->highest_perf / max_cap;
+	min_step = min_cap / CPPC_EM_CAP_STEP;
+	max_step = max_cap / CPPC_EM_CAP_STEP;
+
+	perf_prev = cppc_cpufreq_khz_to_perf(cpu_data, *KHz);
+	step = perf_prev / perf_step;
+
+	if (step > max_step)
+		return -EINVAL;
+
+	if (min_step == max_step) {
+		step = max_step;
+		perf = perf_caps->highest_perf;
+	} else if (step < min_step) {
+		step = min_step;
+		perf = perf_caps->lowest_perf;
+	} else {
+		step++;
+		if (step == max_step)
+			perf = perf_caps->highest_perf;
+		else
+			perf = step * perf_step;
+	}
+
+	*KHz = cppc_cpufreq_perf_to_khz(cpu_data, perf);
+	perf_check = cppc_cpufreq_khz_to_perf(cpu_data, *KHz);
+	step_check = perf_check / perf_step;
+
+	/*
+	 * To avoid bad integer approximation, check that new frequency value
+	 * increased and that the new frequency will be converted to the
+	 * desired step value.
+	 */
+	while ((*KHz == prev_freq) || (step_check != step)) {
+		perf++;
+		*KHz = cppc_cpufreq_perf_to_khz(cpu_data, perf);
+		perf_check = cppc_cpufreq_khz_to_perf(cpu_data, *KHz);
+		step_check = perf_check / perf_step;
+	}
+
+	/*
+	 * With an artificial EM, only the cost value is used. Still the power
+	 * is populated such as 0 < power < EM_MAX_POWER. This allows to add
+	 * more sense to the artificial performance states.
+	 */
+	*power = compute_cost(cpu_dev->id, step);
+
+	return 0;
+}
+
+static int cppc_get_cpu_cost(struct device *cpu_dev, unsigned long KHz,
+		unsigned long *cost)
+{
+	unsigned long perf_step, perf_prev;
+	struct cppc_perf_caps *perf_caps;
+	struct cpufreq_policy *policy;
+	struct cppc_cpudata *cpu_data;
+	unsigned int max_cap;
+	int step;
+
+	policy = cpufreq_cpu_get_raw(cpu_dev->id);
+	cpu_data = policy->driver_data;
+	perf_caps = &cpu_data->perf_caps;
+	max_cap = arch_scale_cpu_capacity(cpu_dev->id);
+
+	perf_prev = cppc_cpufreq_khz_to_perf(cpu_data, KHz);
+	perf_step = CPPC_EM_CAP_STEP * perf_caps->highest_perf / max_cap;
+	step = perf_prev / perf_step;
+
+	*cost = compute_cost(cpu_dev->id, step);
+
+	return 0;
+}
+
+static int populate_efficiency_class(void)
+{
+	struct acpi_madt_generic_interrupt *gicc;
+	DECLARE_BITMAP(used_classes, 256) = {};
+	int class, cpu, index;
+
+	for_each_possible_cpu(cpu) {
+		gicc = acpi_cpu_get_madt_gicc(cpu);
+		class = gicc->efficiency_class;
+		bitmap_set(used_classes, class, 1);
+	}
+
+	if (bitmap_weight(used_classes, 256) <= 1) {
+		pr_debug("Efficiency classes are all equal (=%d). "
+			"No EM registered", class);
+		return -EINVAL;
+	}
+
+	/*
+	 * Squeeze efficiency class values on [0:#efficiency_class-1].
+	 * Values are per spec in [0:255].
+	 */
+	index = 0;
+	for_each_set_bit(class, used_classes, 256) {
+		for_each_possible_cpu(cpu) {
+			gicc = acpi_cpu_get_madt_gicc(cpu);
+			if (gicc->efficiency_class == class)
+				per_cpu(efficiency_class, cpu) = index;
+		}
+		index++;
+	}
+	cppc_cpufreq_driver.register_em = cppc_cpufreq_register_em;
+
+	return 0;
+}
+
+static void cppc_cpufreq_register_em(struct cpufreq_policy *policy)
+{
+	struct cppc_cpudata *cpu_data;
+	struct em_data_callback em_cb =
+		EM_ADV_DATA_CB(cppc_get_cpu_power, cppc_get_cpu_cost);
+
+	cpu_data = policy->driver_data;
+	em_dev_register_perf_domain(get_cpu_device(policy->cpu),
+			get_perf_level_count(policy), &em_cb,
+			cpu_data->shared_cpu_map, 0);
+}
+
 #else
 
 static unsigned int cppc_cpufreq_get_transition_delay_us(unsigned int cpu)
 {
 	return cppc_get_transition_latency(cpu) / NSEC_PER_USEC;
 }
+static int populate_efficiency_class(void)
+{
+	return 0;
+}
+static void cppc_cpufreq_register_em(struct cpufreq_policy *policy)
+{
+}
 #endif
 
 
@@ -536,6 +742,9 @@ static int cppc_cpufreq_cpu_init(struct cpufreq_policy *policy)
 		goto out;
 	}
 
+	policy->fast_switch_possible = cppc_allow_fast_switch();
+	policy->dvfs_possible_from_any_cpu = true;
+
 	/*
 	 * If 'highest_perf' is greater than 'nominal_perf', we assume CPU Boost
 	 * is supported.
@@ -681,6 +890,7 @@ static struct cpufreq_driver cppc_cpufreq_driver = {
 	.verify = cppc_verify_policy,
 	.target = cppc_cpufreq_set_target,
 	.get = cppc_cpufreq_get_rate,
+	.fast_switch = cppc_cpufreq_fast_switch,
 	.init = cppc_cpufreq_cpu_init,
 	.exit = cppc_cpufreq_cpu_exit,
 	.set_boost = cppc_cpufreq_set_boost,
@@ -742,6 +952,7 @@ static int __init cppc_cpufreq_init(void)
 
 	cppc_check_hisi_workaround();
 	cppc_freq_invariance_init();
+	populate_efficiency_class();
 
 	ret = cpufreq_register_driver(&cppc_cpufreq_driver);
 	if (ret)

drivers/cpufreq/cpufreq.c

@@ -28,6 +28,7 @@
 #include <linux/suspend.h>
 #include <linux/syscore_ops.h>
 #include <linux/tick.h>
+#include <linux/units.h>
 #include <trace/events/power.h>
 
 static LIST_HEAD(cpufreq_policy_list);
@@ -947,12 +948,13 @@ static ssize_t show(struct kobject *kobj, struct attribute *attr, char *buf)
 {
 	struct cpufreq_policy *policy = to_policy(kobj);
 	struct freq_attr *fattr = to_attr(attr);
-	ssize_t ret;
+	ssize_t ret = -EBUSY;
 
 	if (!fattr->show)
 		return -EIO;
 
 	down_read(&policy->rwsem);
+	if (likely(!policy_is_inactive(policy)))
 		ret = fattr->show(policy, buf);
 	up_read(&policy->rwsem);
 
@@ -964,7 +966,7 @@ static ssize_t store(struct kobject *kobj, struct attribute *attr,
 {
 	struct cpufreq_policy *policy = to_policy(kobj);
 	struct freq_attr *fattr = to_attr(attr);
-	ssize_t ret = -EINVAL;
+	ssize_t ret = -EBUSY;
 
 	if (!fattr->store)
 		return -EIO;
@@ -978,6 +980,7 @@ static ssize_t store(struct kobject *kobj, struct attribute *attr,
 
 	if (cpu_online(policy->cpu)) {
 		down_write(&policy->rwsem);
+		if (likely(!policy_is_inactive(policy)))
 			ret = fattr->store(policy, buf, count);
 		up_write(&policy->rwsem);
 	}
@@ -1019,11 +1022,12 @@ static void add_cpu_dev_symlink(struct cpufreq_policy *policy, unsigned int cpu,
 		dev_err(dev, "cpufreq symlink creation failed\n");
 }
 
-static void remove_cpu_dev_symlink(struct cpufreq_policy *policy,
+static void remove_cpu_dev_symlink(struct cpufreq_policy *policy, int cpu,
 				   struct device *dev)
 {
 	dev_dbg(dev, "%s: Removing symlink\n", __func__);
 	sysfs_remove_link(&dev->kobj, "cpufreq");
+	cpumask_clear_cpu(cpu, policy->real_cpus);
 }
 
 static int cpufreq_add_dev_interface(struct cpufreq_policy *policy)
@@ -1337,12 +1341,12 @@ static int cpufreq_online(unsigned int cpu)
 		down_write(&policy->rwsem);
 		policy->cpu = cpu;
 		policy->governor = NULL;
-		up_write(&policy->rwsem);
 	} else {
 		new_policy = true;
 		policy = cpufreq_policy_alloc(cpu);
 		if (!policy)
 			return -ENOMEM;
+		down_write(&policy->rwsem);
 	}
 
 	if (!new_policy && cpufreq_driver->online) {
@@ -1382,7 +1386,6 @@ static int cpufreq_online(unsigned int cpu)
 		cpumask_copy(policy->related_cpus, policy->cpus);
 	}
 
-	down_write(&policy->rwsem);
 	/*
 	 * affected cpus must always be the one, which are online. We aren't
 	 * managing offline cpus here.
@@ -1531,9 +1534,9 @@ static int cpufreq_online(unsigned int cpu)
 
 out_destroy_policy:
 	for_each_cpu(j, policy->real_cpus)
-		remove_cpu_dev_symlink(policy, get_cpu_device(j));
+		remove_cpu_dev_symlink(policy, j, get_cpu_device(j));
 
-	up_write(&policy->rwsem);
+	cpumask_clear(policy->cpus);
 
 out_offline_policy:
 	if (cpufreq_driver->offline)
@@ -1544,6 +1547,8 @@ static int cpufreq_online(unsigned int cpu)
 		cpufreq_driver->exit(policy);
 
 out_free_policy:
+	up_write(&policy->rwsem);
+
 	cpufreq_policy_free(policy);
 	return ret;
 }
@@ -1575,47 +1580,36 @@ static int cpufreq_add_dev(struct device *dev, struct subsys_interface *sif)
 	return 0;
 }
 
-static int cpufreq_offline(unsigned int cpu)
+static void __cpufreq_offline(unsigned int cpu, struct cpufreq_policy *policy)
 {
-	struct cpufreq_policy *policy;
 	int ret;
 
-	pr_debug("%s: unregistering CPU %u\n", __func__, cpu);
-
-	policy = cpufreq_cpu_get_raw(cpu);
-	if (!policy) {
-		pr_debug("%s: No cpu_data found\n", __func__);
-		return 0;
-	}
-
-	down_write(&policy->rwsem);
 	if (has_target())
 		cpufreq_stop_governor(policy);
 
 	cpumask_clear_cpu(cpu, policy->cpus);
 
-	if (policy_is_inactive(policy)) {
-		if (has_target())
-			strncpy(policy->last_governor, policy->governor->name,
-				CPUFREQ_NAME_LEN);
-		else
-			policy->last_policy = policy->policy;
-	} else if (cpu == policy->cpu) {
-		/* Nominate new CPU */
-		policy->cpu = cpumask_any(policy->cpus);
-	}
-
-	/* Start governor again for active policy */
 	if (!policy_is_inactive(policy)) {
+		/* Nominate a new CPU if necessary. */
+		if (cpu == policy->cpu)
+			policy->cpu = cpumask_any(policy->cpus);
+
+		/* Start the governor again for the active policy. */
 		if (has_target()) {
 			ret = cpufreq_start_governor(policy);
 			if (ret)
 				pr_err("%s: Failed to start governor\n", __func__);
 		}
 
-		goto unlock;
+		return;
 	}
 
+	if (has_target())
+		strncpy(policy->last_governor, policy->governor->name,
+			CPUFREQ_NAME_LEN);
+	else
+		policy->last_policy = policy->policy;
+
 	if (cpufreq_thermal_control_enabled(cpufreq_driver)) {
 		cpufreq_cooling_unregister(policy->cdev);
 		policy->cdev = NULL;
@@ -1634,8 +1628,24 @@ static int cpufreq_offline(unsigned int cpu)
 		cpufreq_driver->exit(policy);
 		policy->freq_table = NULL;
 	}
+}
+
+static int cpufreq_offline(unsigned int cpu)
+{
+	struct cpufreq_policy *policy;
+
+	pr_debug("%s: unregistering CPU %u\n", __func__, cpu);
+
+	policy = cpufreq_cpu_get_raw(cpu);
+	if (!policy) {
+		pr_debug("%s: No cpu_data found\n", __func__);
+		return 0;
+	}
+
+	down_write(&policy->rwsem);
+
+	__cpufreq_offline(cpu, policy);
 
-unlock:
 	up_write(&policy->rwsem);
 	return 0;
 }
@@ -1653,19 +1663,25 @@ static void cpufreq_remove_dev(struct device *dev, struct subsys_interface *sif)
 	if (!policy)
 		return;
 
+	down_write(&policy->rwsem);
+
 	if (cpu_online(cpu))
-		cpufreq_offline(cpu);
+		__cpufreq_offline(cpu, policy);
 
-	cpumask_clear_cpu(cpu, policy->real_cpus);
+	remove_cpu_dev_symlink(policy, cpu, dev);
-	remove_cpu_dev_symlink(policy, dev);
+
+	if (!cpumask_empty(policy->real_cpus)) {
+		up_write(&policy->rwsem);
+		return;
+	}
 
-	if (cpumask_empty(policy->real_cpus)) {
 	/* We did light-weight exit earlier, do full tear down now */
 	if (cpufreq_driver->offline)
 		cpufreq_driver->exit(policy);
 
+	up_write(&policy->rwsem);
+
 	cpufreq_policy_free(policy);
-	}
 }
 
 /**
@@ -1707,6 +1723,16 @@ static unsigned int cpufreq_verify_current_freq(struct cpufreq_policy *policy, b
 		return new_freq;
 
 	if (policy->cur != new_freq) {
+		/*
+		 * For some platforms, the frequency returned by hardware may be
+		 * slightly different from what is provided in the frequency
+		 * table, for example hardware may return 499 MHz instead of 500
+		 * MHz. In such cases it is better to avoid getting into
+		 * unnecessary frequency updates.
+		 */
+		if (abs(policy->cur - new_freq) < HZ_PER_MHZ)
+			return policy->cur;
+
 		cpufreq_out_of_sync(policy, new_freq);
 		if (update)
 			schedule_work(&policy->update);

drivers/cpufreq/cpufreq_governor.c

@@ -388,6 +388,15 @@ static void free_policy_dbs_info(struct policy_dbs_info *policy_dbs,
 	gov->free(policy_dbs);
 }
 
+static void cpufreq_dbs_data_release(struct kobject *kobj)
+{
+	struct dbs_data *dbs_data = to_dbs_data(to_gov_attr_set(kobj));
+	struct dbs_governor *gov = dbs_data->gov;
+
+	gov->exit(dbs_data);
+	kfree(dbs_data);
+}
+
 int cpufreq_dbs_governor_init(struct cpufreq_policy *policy)
 {
 	struct dbs_governor *gov = dbs_governor_of(policy);
@@ -425,6 +434,7 @@ int cpufreq_dbs_governor_init(struct cpufreq_policy *policy)
 		goto free_policy_dbs_info;
 	}
 
+	dbs_data->gov = gov;
 	gov_attr_set_init(&dbs_data->attr_set, &policy_dbs->list);
 
 	ret = gov->init(dbs_data);
@@ -447,6 +457,7 @@ int cpufreq_dbs_governor_init(struct cpufreq_policy *policy)
 	policy->governor_data = policy_dbs;
 
 	gov->kobj_type.sysfs_ops = &governor_sysfs_ops;
+	gov->kobj_type.release = cpufreq_dbs_data_release;
 	ret = kobject_init_and_add(&dbs_data->attr_set.kobj, &gov->kobj_type,
 				   get_governor_parent_kobj(policy),
 				   "%s", gov->gov.name);
@@ -488,14 +499,9 @@ void cpufreq_dbs_governor_exit(struct cpufreq_policy *policy)
 
 	policy->governor_data = NULL;
 
-	if (!count) {
+	if (!count && !have_governor_per_policy())
-		if (!have_governor_per_policy())
 		gov->gdbs_data = NULL;
 
-		gov->exit(dbs_data);
-		kfree(dbs_data);
-	}
-
 	free_policy_dbs_info(policy_dbs, gov);
 
 	mutex_unlock(&gov_dbs_data_mutex);

drivers/cpufreq/cpufreq_governor.h

@@ -37,6 +37,7 @@ enum {OD_NORMAL_SAMPLE, OD_SUB_SAMPLE};
 /* Governor demand based switching data (per-policy or global). */
 struct dbs_data {
 	struct gov_attr_set attr_set;
+	struct dbs_governor *gov;
 	void *tuners;
 	unsigned int ignore_nice_load;
 	unsigned int sampling_rate;

drivers/cpufreq/intel_pstate.c

@@ -1322,6 +1322,7 @@ static ssize_t store_no_turbo(struct kobject *a, struct kobj_attribute *b,
 	mutex_unlock(&intel_pstate_limits_lock);
 
 	intel_pstate_update_policies();
+	arch_set_max_freq_ratio(global.no_turbo);
 
 	mutex_unlock(&intel_pstate_driver_lock);
 
@@ -2424,6 +2425,7 @@ static const struct x86_cpu_id intel_pstate_cpu_oob_ids[] __initconst = {
 	X86_MATCH(BROADWELL_X,		core_funcs),
 	X86_MATCH(SKYLAKE_X,		core_funcs),
 	X86_MATCH(ICELAKE_X,		core_funcs),
+	X86_MATCH(SAPPHIRERAPIDS_X,	core_funcs),
 	{}
 };
 

drivers/cpufreq/mediatek-cpufreq-hw.c

@@ -51,8 +51,8 @@ static const u16 cpufreq_mtk_offsets[REG_ARRAY_SIZE] = {
 };
 
 static int __maybe_unused
-mtk_cpufreq_get_cpu_power(unsigned long *mW,
+mtk_cpufreq_get_cpu_power(struct device *cpu_dev, unsigned long *mW,
-			  unsigned long *KHz, struct device *cpu_dev)
+			  unsigned long *KHz)
 {
 	struct mtk_cpufreq_data *data;
 	struct cpufreq_policy *policy;

drivers/cpufreq/pasemi-cpufreq.c

@@ -18,7 +18,6 @@
 
 #include <asm/hw_irq.h>
 #include <asm/io.h>
-#include <asm/prom.h>
 #include <asm/time.h>
 #include <asm/smp.h>
 

drivers/cpufreq/pmac32-cpufreq.c

@@ -24,7 +24,7 @@
 #include <linux/device.h>
 #include <linux/hardirq.h>
 #include <linux/of_device.h>
-#include <asm/prom.h>
+
 #include <asm/machdep.h>
 #include <asm/irq.h>
 #include <asm/pmac_feature.h>

drivers/cpufreq/pmac64-cpufreq.c

@@ -22,7 +22,7 @@
 #include <linux/completion.h>
 #include <linux/mutex.h>
 #include <linux/of_device.h>
-#include <asm/prom.h>
+
 #include <asm/machdep.h>
 #include <asm/irq.h>
 #include <asm/sections.h>

drivers/cpufreq/ppc_cbe_cpufreq.c

@@ -12,7 +12,6 @@
 #include <linux/of_platform.h>
 
 #include <asm/machdep.h>
-#include <asm/prom.h>
 #include <asm/cell-regs.h>
 
 #include "ppc_cbe_cpufreq.h"

drivers/cpufreq/ppc_cbe_cpufreq_pmi.c

@@ -13,9 +13,9 @@
 #include <linux/init.h>
 #include <linux/of_platform.h>
 #include <linux/pm_qos.h>
+#include <linux/slab.h>
 
 #include <asm/processor.h>
-#include <asm/prom.h>
 #include <asm/pmi.h>
 #include <asm/cell-regs.h>
 

drivers/cpufreq/scmi-cpufreq.c

@@ -96,8 +96,8 @@ scmi_get_sharing_cpus(struct device *cpu_dev, struct cpumask *cpumask)
 }
 
 static int __maybe_unused
-scmi_get_cpu_power(unsigned long *power, unsigned long *KHz,
+scmi_get_cpu_power(struct device *cpu_dev, unsigned long *power,
-		   struct device *cpu_dev)
+		   unsigned long *KHz)
 {
 	unsigned long Hz;
 	int ret, domain;

drivers/cpuidle/cpuidle-psci-domain.c

@@ -52,7 +52,7 @@ static int psci_pd_init(struct device_node *np, bool use_osi)
 	struct generic_pm_domain *pd;
 	struct psci_pd_provider *pd_provider;
 	struct dev_power_governor *pd_gov;
-	int ret = -ENOMEM, state_count = 0;
+	int ret = -ENOMEM;
 
 	pd = dt_idle_pd_alloc(np, psci_dt_parse_state_node);
 	if (!pd)
@@ -71,7 +71,7 @@ static int psci_pd_init(struct device_node *np, bool use_osi)
 		pd->flags |= GENPD_FLAG_ALWAYS_ON;
 
 	/* Use governor for CPU PM domains if it has some states to manage. */
-	pd_gov = state_count > 0 ? &pm_domain_cpu_gov : NULL;
+	pd_gov = pd->states ? &pm_domain_cpu_gov : NULL;
 
 	ret = pm_genpd_init(pd, pd_gov, false);
 	if (ret)

drivers/cpuidle/cpuidle-psci.c

@@ -23,6 +23,7 @@
 #include <linux/pm_runtime.h>
 #include <linux/slab.h>
 #include <linux/string.h>
+#include <linux/syscore_ops.h>
 
 #include <asm/cpuidle.h>
 
@@ -131,6 +132,49 @@ static int psci_idle_cpuhp_down(unsigned int cpu)
 	return 0;
 }
 
+static void psci_idle_syscore_switch(bool suspend)
+{
+	bool cleared = false;
+	struct device *dev;
+	int cpu;
+
+	for_each_possible_cpu(cpu) {
+		dev = per_cpu_ptr(&psci_cpuidle_data, cpu)->dev;
+
+		if (dev && suspend) {
+			dev_pm_genpd_suspend(dev);
+		} else if (dev) {
+			dev_pm_genpd_resume(dev);
+
+			/* Account for userspace having offlined a CPU. */
+			if (pm_runtime_status_suspended(dev))
+				pm_runtime_set_active(dev);
+
+			/* Clear domain state to re-start fresh. */
+			if (!cleared) {
+				psci_set_domain_state(0);
+				cleared = true;
+			}
+		}
+	}
+}
+
+static int psci_idle_syscore_suspend(void)
+{
+	psci_idle_syscore_switch(true);
+	return 0;
+}
+
+static void psci_idle_syscore_resume(void)
+{
+	psci_idle_syscore_switch(false);
+}
+
+static struct syscore_ops psci_idle_syscore_ops = {
+	.suspend = psci_idle_syscore_suspend,
+	.resume = psci_idle_syscore_resume,
+};
+
 static void psci_idle_init_cpuhp(void)
 {
 	int err;
@@ -138,6 +182,8 @@ static void psci_idle_init_cpuhp(void)
 	if (!psci_cpuidle_use_cpuhp)
 		return;
 
+	register_syscore_ops(&psci_idle_syscore_ops);
+
 	err = cpuhp_setup_state_nocalls(CPUHP_AP_CPU_PM_STARTING,
 					"cpuidle/psci:online",
 					psci_idle_cpuhp_up,

drivers/cpuidle/cpuidle-riscv-sbi.c

@@ -414,7 +414,7 @@ static int sbi_pd_init(struct device_node *np)
 	struct generic_pm_domain *pd;
 	struct sbi_pd_provider *pd_provider;
 	struct dev_power_governor *pd_gov;
-	int ret = -ENOMEM, state_count = 0;
+	int ret = -ENOMEM;
 
 	pd = dt_idle_pd_alloc(np, sbi_dt_parse_state_node);
 	if (!pd)
@@ -433,7 +433,7 @@ static int sbi_pd_init(struct device_node *np)
 		pd->flags |= GENPD_FLAG_ALWAYS_ON;
 
 	/* Use governor for CPU PM domains if it has some states to manage. */
-	pd_gov = state_count > 0 ? &pm_domain_cpu_gov : NULL;
+	pd_gov = pd->states ? &pm_domain_cpu_gov : NULL;
 
 	ret = pm_genpd_init(pd, pd_gov, false);
 	if (ret)

drivers/devfreq/devfreq.c

@@ -112,14 +112,14 @@ static unsigned long find_available_max_freq(struct devfreq *devfreq)
 }
 
 /**
- * get_freq_range() - Get the current freq range
+ * devfreq_get_freq_range() - Get the current freq range
  * @devfreq:	the devfreq instance
  * @min_freq:	the min frequency
  * @max_freq:	the max frequency
  *
  * This takes into consideration all constraints.
  */
-static void get_freq_range(struct devfreq *devfreq,
+void devfreq_get_freq_range(struct devfreq *devfreq,
 			    unsigned long *min_freq,
 			    unsigned long *max_freq)
 {
@@ -158,6 +158,7 @@ static void get_freq_range(struct devfreq *devfreq,
 	if (*min_freq > *max_freq)
 		*min_freq = *max_freq;
 }
+EXPORT_SYMBOL(devfreq_get_freq_range);
 
 /**
  * devfreq_get_freq_level() - Lookup freq_table for the frequency
@@ -418,7 +419,7 @@ int devfreq_update_target(struct devfreq *devfreq, unsigned long freq)
 	err = devfreq->governor->get_target_freq(devfreq, &freq);
 	if (err)
 		return err;
-	get_freq_range(devfreq, &min_freq, &max_freq);
+	devfreq_get_freq_range(devfreq, &min_freq, &max_freq);
 
 	if (freq < min_freq) {
 		freq = min_freq;
@@ -785,6 +786,7 @@ struct devfreq *devfreq_add_device(struct device *dev,
 {
 	struct devfreq *devfreq;
 	struct devfreq_governor *governor;
+	unsigned long min_freq, max_freq;
 	int err = 0;
 
 	if (!dev || !profile || !governor_name) {
@@ -849,6 +851,8 @@ struct devfreq *devfreq_add_device(struct device *dev,
 		goto err_dev;
 	}
 
+	devfreq_get_freq_range(devfreq, &min_freq, &max_freq);
+
 	devfreq->suspend_freq = dev_pm_opp_get_suspend_opp_freq(dev);
 	devfreq->opp_table = dev_pm_opp_get_opp_table(dev);
 	if (IS_ERR(devfreq->opp_table))
@@ -1587,7 +1591,7 @@ static ssize_t min_freq_show(struct device *dev, struct device_attribute *attr,
 	unsigned long min_freq, max_freq;
 
 	mutex_lock(&df->lock);
-	get_freq_range(df, &min_freq, &max_freq);
+	devfreq_get_freq_range(df, &min_freq, &max_freq);
 	mutex_unlock(&df->lock);
 
 	return sprintf(buf, "%lu\n", min_freq);
@@ -1641,7 +1645,7 @@ static ssize_t max_freq_show(struct device *dev, struct device_attribute *attr,
 	unsigned long min_freq, max_freq;
 
 	mutex_lock(&df->lock);
-	get_freq_range(df, &min_freq, &max_freq);
+	devfreq_get_freq_range(df, &min_freq, &max_freq);
 	mutex_unlock(&df->lock);
 
 	return sprintf(buf, "%lu\n", max_freq);
@@ -1955,7 +1959,7 @@ static int devfreq_summary_show(struct seq_file *s, void *data)
 
 		mutex_lock(&devfreq->lock);
 		cur_freq = devfreq->previous_freq;
-		get_freq_range(devfreq, &min_freq, &max_freq);
+		devfreq_get_freq_range(devfreq, &min_freq, &max_freq);
 		timer = devfreq->profile->timer;
 
 		if (IS_SUPPORTED_ATTR(devfreq->governor->attrs, POLLING_INTERVAL))

drivers/devfreq/governor.h

@@ -47,6 +47,31 @@
 #define DEVFREQ_GOV_ATTR_POLLING_INTERVAL		BIT(0)
 #define DEVFREQ_GOV_ATTR_TIMER				BIT(1)
 
+/**
+ * struct devfreq_cpu_data - Hold the per-cpu data
+ * @node:	list node
+ * @dev:	reference to cpu device.
+ * @first_cpu:	the cpumask of the first cpu of a policy.
+ * @opp_table:	reference to cpu opp table.
+ * @cur_freq:	the current frequency of the cpu.
+ * @min_freq:	the min frequency of the cpu.
+ * @max_freq:	the max frequency of the cpu.
+ *
+ * This structure stores the required cpu_data of a cpu.
+ * This is auto-populated by the governor.
+ */
+struct devfreq_cpu_data {
+	struct list_head node;
+
+	struct device *dev;
+	unsigned int first_cpu;
+
+	struct opp_table *opp_table;
+	unsigned int cur_freq;
+	unsigned int min_freq;
+	unsigned int max_freq;
+};
+
 /**
  * struct devfreq_governor - Devfreq policy governor
  * @node:		list node - contains registered devfreq governors
@@ -89,6 +114,8 @@ int devm_devfreq_add_governor(struct device *dev,
 
 int devfreq_update_status(struct devfreq *devfreq, unsigned long freq);
 int devfreq_update_target(struct devfreq *devfreq, unsigned long freq);
+void devfreq_get_freq_range(struct devfreq *devfreq, unsigned long *min_freq,
+			    unsigned long *max_freq);
 
 static inline int devfreq_update_stats(struct devfreq *df)
 {

drivers/devfreq/governor_passive.c

@@ -1,4 +1,4 @@
-// SPDX-License-Identifier: GPL-2.0-only
+	// SPDX-License-Identifier: GPL-2.0-only
 /*
  * linux/drivers/devfreq/governor_passive.c
  *
@@ -8,20 +8,159 @@
  */
 
 #include <linux/module.h>
+#include <linux/cpu.h>
+#include <linux/cpufreq.h>
+#include <linux/cpumask.h>
+#include <linux/slab.h>
 #include <linux/device.h>
 #include <linux/devfreq.h>
 #include "governor.h"
 
-static int devfreq_passive_get_target_freq(struct devfreq *devfreq,
+#define HZ_PER_KHZ	1000
+
+static struct devfreq_cpu_data *
+get_parent_cpu_data(struct devfreq_passive_data *p_data,
+		    struct cpufreq_policy *policy)
+{
+	struct devfreq_cpu_data *parent_cpu_data;
+
+	if (!p_data || !policy)
+		return NULL;
+
+	list_for_each_entry(parent_cpu_data, &p_data->cpu_data_list, node)
+		if (parent_cpu_data->first_cpu == cpumask_first(policy->related_cpus))
+			return parent_cpu_data;
+
+	return NULL;
+}
+
+static unsigned long get_target_freq_by_required_opp(struct device *p_dev,
+						struct opp_table *p_opp_table,
+						struct opp_table *opp_table,
+						unsigned long *freq)
+{
+	struct dev_pm_opp *opp = NULL, *p_opp = NULL;
+	unsigned long target_freq;
+
+	if (!p_dev || !p_opp_table || !opp_table || !freq)
+		return 0;
+
+	p_opp = devfreq_recommended_opp(p_dev, freq, 0);
+	if (IS_ERR(p_opp))
+		return 0;
+
+	opp = dev_pm_opp_xlate_required_opp(p_opp_table, opp_table, p_opp);
+	dev_pm_opp_put(p_opp);
+
+	if (IS_ERR(opp))
+		return 0;
+
+	target_freq = dev_pm_opp_get_freq(opp);
+	dev_pm_opp_put(opp);
+
+	return target_freq;
+}
+
+static int get_target_freq_with_cpufreq(struct devfreq *devfreq,
+					unsigned long *target_freq)
+{
+	struct devfreq_passive_data *p_data =
+				(struct devfreq_passive_data *)devfreq->data;
+	struct devfreq_cpu_data *parent_cpu_data;
+	struct cpufreq_policy *policy;
+	unsigned long cpu, cpu_cur, cpu_min, cpu_max, cpu_percent;
+	unsigned long dev_min, dev_max;
+	unsigned long freq = 0;
+	int ret = 0;
+
+	for_each_online_cpu(cpu) {
+		policy = cpufreq_cpu_get(cpu);
+		if (!policy) {
+			ret = -EINVAL;
+			continue;
+		}
+
+		parent_cpu_data = get_parent_cpu_data(p_data, policy);
+		if (!parent_cpu_data) {
+			cpufreq_cpu_put(policy);
+			continue;
+		}
+
+		/* Get target freq via required opps */
+		cpu_cur = parent_cpu_data->cur_freq * HZ_PER_KHZ;
+		freq = get_target_freq_by_required_opp(parent_cpu_data->dev,
+					parent_cpu_data->opp_table,
+					devfreq->opp_table, &cpu_cur);
+		if (freq) {
+			*target_freq = max(freq, *target_freq);
+			cpufreq_cpu_put(policy);
+			continue;
+		}
+
+		/* Use interpolation if required opps is not available */
+		devfreq_get_freq_range(devfreq, &dev_min, &dev_max);
+
+		cpu_min = parent_cpu_data->min_freq;
+		cpu_max = parent_cpu_data->max_freq;
+		cpu_cur = parent_cpu_data->cur_freq;
+
+		cpu_percent = ((cpu_cur - cpu_min) * 100) / (cpu_max - cpu_min);
+		freq = dev_min + mult_frac(dev_max - dev_min, cpu_percent, 100);
+
+		*target_freq = max(freq, *target_freq);
+		cpufreq_cpu_put(policy);
+	}
+
+	return ret;
+}
+
+static int get_target_freq_with_devfreq(struct devfreq *devfreq,
 					unsigned long *freq)
 {
 	struct devfreq_passive_data *p_data
 			= (struct devfreq_passive_data *)devfreq->data;
 	struct devfreq *parent_devfreq = (struct devfreq *)p_data->parent;
 	unsigned long child_freq = ULONG_MAX;
-	struct dev_pm_opp *opp, *p_opp;
 	int i, count;
 
+	/* Get target freq via required opps */
+	child_freq = get_target_freq_by_required_opp(parent_devfreq->dev.parent,
+						parent_devfreq->opp_table,
+						devfreq->opp_table, freq);
+	if (child_freq)
+		goto out;
+
+	/* Use interpolation if required opps is not available */
+	for (i = 0; i < parent_devfreq->profile->max_state; i++)
+		if (parent_devfreq->profile->freq_table[i] == *freq)
+			break;
+
+	if (i == parent_devfreq->profile->max_state)
+		return -EINVAL;
+
+	if (i < devfreq->profile->max_state) {
+		child_freq = devfreq->profile->freq_table[i];
+	} else {
+		count = devfreq->profile->max_state;
+		child_freq = devfreq->profile->freq_table[count - 1];
+	}
+
+out:
+	*freq = child_freq;
+
+	return 0;
+}
+
+static int devfreq_passive_get_target_freq(struct devfreq *devfreq,
+					   unsigned long *freq)
+{
+	struct devfreq_passive_data *p_data =
+				(struct devfreq_passive_data *)devfreq->data;
+	int ret;
+
+	if (!p_data)
+		return -EINVAL;
+
 	/*
 	 * If the devfreq device with passive governor has the specific method
 	 * to determine the next frequency, should use the get_target_freq()
@@ -30,75 +169,178 @@ static int devfreq_passive_get_target_freq(struct devfreq *devfreq,
 	if (p_data->get_target_freq)
 		return p_data->get_target_freq(devfreq, freq);
 
-	/*
+	switch (p_data->parent_type) {
-	 * If the parent and passive devfreq device uses the OPP table,
+	case DEVFREQ_PARENT_DEV:
-	 * get the next frequency by using the OPP table.
+		ret = get_target_freq_with_devfreq(devfreq, freq);
-	 */
+		break;
-
+	case CPUFREQ_PARENT_DEV:
-	/*
+		ret = get_target_freq_with_cpufreq(devfreq, freq);
-	 * - parent devfreq device uses the governors except for passive.
+		break;
-	 * - passive devfreq device uses the passive governor.
+	default:
-	 *
+		ret = -EINVAL;
-	 * Each devfreq has the OPP table. After deciding the new frequency
+		dev_err(&devfreq->dev, "Invalid parent type\n");
-	 * from the governor of parent devfreq device, the passive governor
-	 * need to get the index of new frequency on OPP table of parent
-	 * device. And then the index is used for getting the suitable
-	 * new frequency for passive devfreq device.
-	 */
-	if (!devfreq->profile || !devfreq->profile->freq_table
-		|| devfreq->profile->max_state <= 0)
-		return -EINVAL;
-
-	/*
-	 * The passive governor have to get the correct frequency from OPP
-	 * list of parent device. Because in this case, *freq is temporary
-	 * value which is decided by ondemand governor.
-	 */
-	if (devfreq->opp_table && parent_devfreq->opp_table) {
-		p_opp = devfreq_recommended_opp(parent_devfreq->dev.parent,
-						freq, 0);
-		if (IS_ERR(p_opp))
-			return PTR_ERR(p_opp);
-
-		opp = dev_pm_opp_xlate_required_opp(parent_devfreq->opp_table,
-						    devfreq->opp_table, p_opp);
-		dev_pm_opp_put(p_opp);
-
-		if (IS_ERR(opp))
-			goto no_required_opp;
-
-		*freq = dev_pm_opp_get_freq(opp);
-		dev_pm_opp_put(opp);
-
-		return 0;
-	}
-
-no_required_opp:
-	/*
-	 * Get the OPP table's index of decided frequency by governor
-	 * of parent device.
-	 */
-	for (i = 0; i < parent_devfreq->profile->max_state; i++)
-		if (parent_devfreq->profile->freq_table[i] == *freq)
 		break;
-
-	if (i == parent_devfreq->profile->max_state)
-		return -EINVAL;
-
-	/* Get the suitable frequency by using index of parent device. */
-	if (i < devfreq->profile->max_state) {
-		child_freq = devfreq->profile->freq_table[i];
-	} else {
-		count = devfreq->profile->max_state;
-		child_freq = devfreq->profile->freq_table[count - 1];
 	}
 
-	/* Return the suitable frequency for passive device. */
+	return ret;
-	*freq = child_freq;
+}
+
+static int cpufreq_passive_notifier_call(struct notifier_block *nb,
+					 unsigned long event, void *ptr)
+{
+	struct devfreq_passive_data *p_data =
+			container_of(nb, struct devfreq_passive_data, nb);
+	struct devfreq *devfreq = (struct devfreq *)p_data->this;
+	struct devfreq_cpu_data *parent_cpu_data;
+	struct cpufreq_freqs *freqs = ptr;
+	unsigned int cur_freq;
+	int ret;
+
+	if (event != CPUFREQ_POSTCHANGE || !freqs)
+		return 0;
+
+	parent_cpu_data = get_parent_cpu_data(p_data, freqs->policy);
+	if (!parent_cpu_data || parent_cpu_data->cur_freq == freqs->new)
+		return 0;
+
+	cur_freq = parent_cpu_data->cur_freq;
+	parent_cpu_data->cur_freq = freqs->new;
+
+	mutex_lock(&devfreq->lock);
+	ret = devfreq_update_target(devfreq, freqs->new);
+	mutex_unlock(&devfreq->lock);
+	if (ret) {
+		parent_cpu_data->cur_freq = cur_freq;
+		dev_err(&devfreq->dev, "failed to update the frequency.\n");
+		return ret;
+	}
 
 	return 0;
 }
 
+static int cpufreq_passive_unregister_notifier(struct devfreq *devfreq)
+{
+	struct devfreq_passive_data *p_data
+			= (struct devfreq_passive_data *)devfreq->data;
+	struct devfreq_cpu_data *parent_cpu_data;
+	int cpu, ret = 0;
+
+	if (p_data->nb.notifier_call) {
+		ret = cpufreq_unregister_notifier(&p_data->nb,
+					CPUFREQ_TRANSITION_NOTIFIER);
+		if (ret < 0)
+			return ret;
+	}
+
+	for_each_possible_cpu(cpu) {
+		struct cpufreq_policy *policy = cpufreq_cpu_get(cpu);
+		if (!policy) {
+			ret = -EINVAL;
+			continue;
+		}
+
+		parent_cpu_data = get_parent_cpu_data(p_data, policy);
+		if (!parent_cpu_data) {
+			cpufreq_cpu_put(policy);
+			continue;
+		}
+
+		list_del(&parent_cpu_data->node);
+		if (parent_cpu_data->opp_table)
+			dev_pm_opp_put_opp_table(parent_cpu_data->opp_table);
+		kfree(parent_cpu_data);
+		cpufreq_cpu_put(policy);
+	}
+
+	return ret;
+}
+
+static int cpufreq_passive_register_notifier(struct devfreq *devfreq)
+{
+	struct devfreq_passive_data *p_data
+			= (struct devfreq_passive_data *)devfreq->data;
+	struct device *dev = devfreq->dev.parent;
+	struct opp_table *opp_table = NULL;
+	struct devfreq_cpu_data *parent_cpu_data;
+	struct cpufreq_policy *policy;
+	struct device *cpu_dev;
+	unsigned int cpu;
+	int ret;
+
+	p_data->cpu_data_list
+		= (struct list_head)LIST_HEAD_INIT(p_data->cpu_data_list);
+
+	p_data->nb.notifier_call = cpufreq_passive_notifier_call;
+	ret = cpufreq_register_notifier(&p_data->nb, CPUFREQ_TRANSITION_NOTIFIER);
+	if (ret) {
+		dev_err(dev, "failed to register cpufreq notifier\n");
+		p_data->nb.notifier_call = NULL;
+		goto err;
+	}
+
+	for_each_possible_cpu(cpu) {
+		policy = cpufreq_cpu_get(cpu);
+		if (!policy) {
+			ret = -EPROBE_DEFER;
+			goto err;
+		}
+
+		parent_cpu_data = get_parent_cpu_data(p_data, policy);
+		if (parent_cpu_data) {
+			cpufreq_cpu_put(policy);
+			continue;
+		}
+
+		parent_cpu_data = kzalloc(sizeof(*parent_cpu_data),
+						GFP_KERNEL);
+		if (!parent_cpu_data) {
+			ret = -ENOMEM;
+			goto err_put_policy;
+		}
+
+		cpu_dev = get_cpu_device(cpu);
+		if (!cpu_dev) {
+			dev_err(dev, "failed to get cpu device\n");
+			ret = -ENODEV;
+			goto err_free_cpu_data;
+		}
+
+		opp_table = dev_pm_opp_get_opp_table(cpu_dev);
+		if (IS_ERR(opp_table)) {
+			dev_err(dev, "failed to get opp_table of cpu%d\n", cpu);
+			ret = PTR_ERR(opp_table);
+			goto err_free_cpu_data;
+		}
+
+		parent_cpu_data->dev = cpu_dev;
+		parent_cpu_data->opp_table = opp_table;
+		parent_cpu_data->first_cpu = cpumask_first(policy->related_cpus);
+		parent_cpu_data->cur_freq = policy->cur;
+		parent_cpu_data->min_freq = policy->cpuinfo.min_freq;
+		parent_cpu_data->max_freq = policy->cpuinfo.max_freq;
+
+		list_add_tail(&parent_cpu_data->node, &p_data->cpu_data_list);
+		cpufreq_cpu_put(policy);
+	}
+
+	mutex_lock(&devfreq->lock);
+	ret = devfreq_update_target(devfreq, 0L);
+	mutex_unlock(&devfreq->lock);
+	if (ret)
+		dev_err(dev, "failed to update the frequency\n");
+
+	return ret;
+
+err_free_cpu_data:
+	kfree(parent_cpu_data);
+err_put_policy:
+	cpufreq_cpu_put(policy);
+err:
+	WARN_ON(cpufreq_passive_unregister_notifier(devfreq));
+
+	return ret;
+}
+
 static int devfreq_passive_notifier_call(struct notifier_block *nb,
 				unsigned long event, void *ptr)
 {
@@ -131,30 +373,55 @@ static int devfreq_passive_notifier_call(struct notifier_block *nb,
 	return NOTIFY_DONE;
 }
 
-static int devfreq_passive_event_handler(struct devfreq *devfreq,
+static int devfreq_passive_unregister_notifier(struct devfreq *devfreq)
-				unsigned int event, void *data)
+{
+	struct devfreq_passive_data *p_data
+			= (struct devfreq_passive_data *)devfreq->data;
+	struct devfreq *parent = (struct devfreq *)p_data->parent;
+	struct notifier_block *nb = &p_data->nb;
+
+	return devfreq_unregister_notifier(parent, nb, DEVFREQ_TRANSITION_NOTIFIER);
+}
+
+static int devfreq_passive_register_notifier(struct devfreq *devfreq)
 {
 	struct devfreq_passive_data *p_data
 			= (struct devfreq_passive_data *)devfreq->data;
 	struct devfreq *parent = (struct devfreq *)p_data->parent;
 	struct notifier_block *nb = &p_data->nb;
-	int ret = 0;
 
 	if (!parent)
 		return -EPROBE_DEFER;
 
-	switch (event) {
+	nb->notifier_call = devfreq_passive_notifier_call;
-	case DEVFREQ_GOV_START:
+	return devfreq_register_notifier(parent, nb, DEVFREQ_TRANSITION_NOTIFIER);
+}
+
+static int devfreq_passive_event_handler(struct devfreq *devfreq,
+				unsigned int event, void *data)
+{
+	struct devfreq_passive_data *p_data
+			= (struct devfreq_passive_data *)devfreq->data;
+	int ret = 0;
+
+	if (!p_data)
+		return -EINVAL;
+
 	if (!p_data->this)
 		p_data->this = devfreq;
 
-		nb->notifier_call = devfreq_passive_notifier_call;
+	switch (event) {
-		ret = devfreq_register_notifier(parent, nb,
+	case DEVFREQ_GOV_START:
-					DEVFREQ_TRANSITION_NOTIFIER);
+		if (p_data->parent_type == DEVFREQ_PARENT_DEV)
+			ret = devfreq_passive_register_notifier(devfreq);
+		else if (p_data->parent_type == CPUFREQ_PARENT_DEV)
+			ret = cpufreq_passive_register_notifier(devfreq);
 		break;
 	case DEVFREQ_GOV_STOP:
-		WARN_ON(devfreq_unregister_notifier(parent, nb,
+		if (p_data->parent_type == DEVFREQ_PARENT_DEV)
-					DEVFREQ_TRANSITION_NOTIFIER));
+			WARN_ON(devfreq_passive_unregister_notifier(devfreq));
+		else if (p_data->parent_type == CPUFREQ_PARENT_DEV)
+			WARN_ON(cpufreq_passive_unregister_notifier(devfreq));
 		break;
 	default:
 		break;

drivers/devfreq/rk3399_dmc.c

@@ -5,6 +5,7 @@
  */
 
 #include <linux/arm-smccc.h>
+#include <linux/bitfield.h>
 #include <linux/clk.h>
 #include <linux/delay.h>
 #include <linux/devfreq.h>
@@ -20,55 +21,49 @@
 #include <linux/rwsem.h>
 #include <linux/suspend.h>
 
+#include <soc/rockchip/pm_domains.h>
 #include <soc/rockchip/rk3399_grf.h>
 #include <soc/rockchip/rockchip_sip.h>
 
-struct dram_timing {
+#define NS_TO_CYCLE(NS, MHz)				(((NS) * (MHz)) / NSEC_PER_USEC)
-	unsigned int ddr3_speed_bin;
+
-	unsigned int pd_idle;
+#define RK3399_SET_ODT_PD_0_SR_IDLE			GENMASK(7, 0)
-	unsigned int sr_idle;
+#define RK3399_SET_ODT_PD_0_SR_MC_GATE_IDLE		GENMASK(15, 8)
-	unsigned int sr_mc_gate_idle;
+#define RK3399_SET_ODT_PD_0_STANDBY_IDLE		GENMASK(31, 16)
-	unsigned int srpd_lite_idle;
+
-	unsigned int standby_idle;
+#define RK3399_SET_ODT_PD_1_PD_IDLE			GENMASK(11, 0)
-	unsigned int auto_pd_dis_freq;
+#define RK3399_SET_ODT_PD_1_SRPD_LITE_IDLE		GENMASK(27, 16)
-	unsigned int dram_dll_dis_freq;
+
-	unsigned int phy_dll_dis_freq;
+#define RK3399_SET_ODT_PD_2_ODT_ENABLE			BIT(0)
-	unsigned int ddr3_odt_dis_freq;
-	unsigned int ddr3_drv;
-	unsigned int ddr3_odt;
-	unsigned int phy_ddr3_ca_drv;
-	unsigned int phy_ddr3_dq_drv;
-	unsigned int phy_ddr3_odt;
-	unsigned int lpddr3_odt_dis_freq;
-	unsigned int lpddr3_drv;
-	unsigned int lpddr3_odt;
-	unsigned int phy_lpddr3_ca_drv;
-	unsigned int phy_lpddr3_dq_drv;
-	unsigned int phy_lpddr3_odt;
-	unsigned int lpddr4_odt_dis_freq;
-	unsigned int lpddr4_drv;
-	unsigned int lpddr4_dq_odt;
-	unsigned int lpddr4_ca_odt;
-	unsigned int phy_lpddr4_ca_drv;
-	unsigned int phy_lpddr4_ck_cs_drv;
-	unsigned int phy_lpddr4_dq_drv;
-	unsigned int phy_lpddr4_odt;
-};
 
 struct rk3399_dmcfreq {
 	struct device *dev;
 	struct devfreq *devfreq;
+	struct devfreq_dev_profile profile;
 	struct devfreq_simple_ondemand_data ondemand_data;
 	struct clk *dmc_clk;
 	struct devfreq_event_dev *edev;
 	struct mutex lock;
-	struct dram_timing timing;
 	struct regulator *vdd_center;
 	struct regmap *regmap_pmu;
 	unsigned long rate, target_rate;
 	unsigned long volt, target_volt;
 	unsigned int odt_dis_freq;
-	int odt_pd_arg0, odt_pd_arg1;
+
+	unsigned int pd_idle_ns;
+	unsigned int sr_idle_ns;
+	unsigned int sr_mc_gate_idle_ns;
+	unsigned int srpd_lite_idle_ns;
+	unsigned int standby_idle_ns;
+	unsigned int ddr3_odt_dis_freq;
+	unsigned int lpddr3_odt_dis_freq;
+	unsigned int lpddr4_odt_dis_freq;
+
+	unsigned int pd_idle_dis_freq;
+	unsigned int sr_idle_dis_freq;
+	unsigned int sr_mc_gate_idle_dis_freq;
+	unsigned int srpd_lite_idle_dis_freq;
+	unsigned int standby_idle_dis_freq;
 };
 
 static int rk3399_dmcfreq_target(struct device *dev, unsigned long *freq,
@@ -78,10 +73,14 @@ static int rk3399_dmcfreq_target(struct device *dev, unsigned long *freq,
 	struct dev_pm_opp *opp;
 	unsigned long old_clk_rate = dmcfreq->rate;
 	unsigned long target_volt, target_rate;
+	unsigned int ddrcon_mhz;
 	struct arm_smccc_res res;
-	bool odt_enable = false;
 	int err;
 
+	u32 odt_pd_arg0 = 0;
+	u32 odt_pd_arg1 = 0;
+	u32 odt_pd_arg2 = 0;
+
 	opp = devfreq_recommended_opp(dev, freq, flags);
 	if (IS_ERR(opp))
 		return PTR_ERR(opp);
@@ -95,19 +94,71 @@ static int rk3399_dmcfreq_target(struct device *dev, unsigned long *freq,
 
 	mutex_lock(&dmcfreq->lock);
 
+	/*
+	 * Ensure power-domain transitions don't interfere with ARM Trusted
+	 * Firmware power-domain idling.
+	 */
+	err = rockchip_pmu_block();
+	if (err) {
+		dev_err(dev, "Failed to block PMU: %d\n", err);
+		goto out_unlock;
+	}
+
+	/*
+	 * Some idle parameters may be based on the DDR controller clock, which
+	 * is half of the DDR frequency.
+	 * pd_idle and standby_idle are based on the controller clock cycle.
+	 * sr_idle_cycle, sr_mc_gate_idle_cycle, and srpd_lite_idle_cycle
+	 * are based on the 1024 controller clock cycle
+	 */
+	ddrcon_mhz = target_rate / USEC_PER_SEC / 2;
+
+	u32p_replace_bits(&odt_pd_arg1,
+			  NS_TO_CYCLE(dmcfreq->pd_idle_ns, ddrcon_mhz),
+			  RK3399_SET_ODT_PD_1_PD_IDLE);
+	u32p_replace_bits(&odt_pd_arg0,
+			  NS_TO_CYCLE(dmcfreq->standby_idle_ns, ddrcon_mhz),
+			  RK3399_SET_ODT_PD_0_STANDBY_IDLE);
+	u32p_replace_bits(&odt_pd_arg0,
+			  DIV_ROUND_UP(NS_TO_CYCLE(dmcfreq->sr_idle_ns,
+						   ddrcon_mhz), 1024),
+			  RK3399_SET_ODT_PD_0_SR_IDLE);
+	u32p_replace_bits(&odt_pd_arg0,
+			  DIV_ROUND_UP(NS_TO_CYCLE(dmcfreq->sr_mc_gate_idle_ns,
+						   ddrcon_mhz), 1024),
+			  RK3399_SET_ODT_PD_0_SR_MC_GATE_IDLE);
+	u32p_replace_bits(&odt_pd_arg1,
+			  DIV_ROUND_UP(NS_TO_CYCLE(dmcfreq->srpd_lite_idle_ns,
+						   ddrcon_mhz), 1024),
+			  RK3399_SET_ODT_PD_1_SRPD_LITE_IDLE);
+
 	if (dmcfreq->regmap_pmu) {
+		if (target_rate >= dmcfreq->sr_idle_dis_freq)
+			odt_pd_arg0 &= ~RK3399_SET_ODT_PD_0_SR_IDLE;
+
+		if (target_rate >= dmcfreq->sr_mc_gate_idle_dis_freq)
+			odt_pd_arg0 &= ~RK3399_SET_ODT_PD_0_SR_MC_GATE_IDLE;
+
+		if (target_rate >= dmcfreq->standby_idle_dis_freq)
+			odt_pd_arg0 &= ~RK3399_SET_ODT_PD_0_STANDBY_IDLE;
+
+		if (target_rate >= dmcfreq->pd_idle_dis_freq)
+			odt_pd_arg1 &= ~RK3399_SET_ODT_PD_1_PD_IDLE;
+
+		if (target_rate >= dmcfreq->srpd_lite_idle_dis_freq)
+			odt_pd_arg1 &= ~RK3399_SET_ODT_PD_1_SRPD_LITE_IDLE;
+
 		if (target_rate >= dmcfreq->odt_dis_freq)
-			odt_enable = true;
+			odt_pd_arg2 |= RK3399_SET_ODT_PD_2_ODT_ENABLE;
 
 		/*
 		 * This makes a SMC call to the TF-A to set the DDR PD
 		 * (power-down) timings and to enable or disable the
 		 * ODT (on-die termination) resistors.
 		 */
-		arm_smccc_smc(ROCKCHIP_SIP_DRAM_FREQ, dmcfreq->odt_pd_arg0,
+		arm_smccc_smc(ROCKCHIP_SIP_DRAM_FREQ, odt_pd_arg0, odt_pd_arg1,
-			      dmcfreq->odt_pd_arg1,
+			      ROCKCHIP_SIP_CONFIG_DRAM_SET_ODT_PD, odt_pd_arg2,
-			      ROCKCHIP_SIP_CONFIG_DRAM_SET_ODT_PD,
+			      0, 0, 0, &res);
-			      odt_enable, 0, 0, 0, &res);
 	}
 
 	/*
@@ -158,6 +209,8 @@ static int rk3399_dmcfreq_target(struct device *dev, unsigned long *freq,
 	dmcfreq->volt = target_volt;
 
 out:
+	rockchip_pmu_unblock();
+out_unlock:
 	mutex_unlock(&dmcfreq->lock);
 	return err;
 }
@@ -189,13 +242,6 @@ static int rk3399_dmcfreq_get_cur_freq(struct device *dev, unsigned long *freq)
 	return 0;
 }
 
-static struct devfreq_dev_profile rk3399_devfreq_dmc_profile = {
-	.polling_ms	= 200,
-	.target		= rk3399_dmcfreq_target,
-	.get_dev_status	= rk3399_dmcfreq_get_dev_status,
-	.get_cur_freq	= rk3399_dmcfreq_get_cur_freq,
-};
-
 static __maybe_unused int rk3399_dmcfreq_suspend(struct device *dev)
 {
 	struct rk3399_dmcfreq *dmcfreq = dev_get_drvdata(dev);
@@ -238,69 +284,48 @@ static __maybe_unused int rk3399_dmcfreq_resume(struct device *dev)
 static SIMPLE_DEV_PM_OPS(rk3399_dmcfreq_pm, rk3399_dmcfreq_suspend,
 			 rk3399_dmcfreq_resume);
 
-static int of_get_ddr_timings(struct dram_timing *timing,
+static int rk3399_dmcfreq_of_props(struct rk3399_dmcfreq *data,
 				   struct device_node *np)
 {
 	int ret = 0;
 
-	ret = of_property_read_u32(np, "rockchip,ddr3_speed_bin",
+	/*
-				   &timing->ddr3_speed_bin);
+	 * These are all optional, and serve as minimum bounds. Give them large
-	ret |= of_property_read_u32(np, "rockchip,pd_idle",
+	 * (i.e., never "disabled") values if the DT doesn't specify one.
-				    &timing->pd_idle);
+	 */
-	ret |= of_property_read_u32(np, "rockchip,sr_idle",
+	data->pd_idle_dis_freq =
-				    &timing->sr_idle);
+		data->sr_idle_dis_freq =
-	ret |= of_property_read_u32(np, "rockchip,sr_mc_gate_idle",
+		data->sr_mc_gate_idle_dis_freq =
-				    &timing->sr_mc_gate_idle);
+		data->srpd_lite_idle_dis_freq =
-	ret |= of_property_read_u32(np, "rockchip,srpd_lite_idle",
+		data->standby_idle_dis_freq = UINT_MAX;
-				    &timing->srpd_lite_idle);
+
-	ret |= of_property_read_u32(np, "rockchip,standby_idle",
+	ret |= of_property_read_u32(np, "rockchip,pd-idle-ns",
-				    &timing->standby_idle);
+				    &data->pd_idle_ns);
-	ret |= of_property_read_u32(np, "rockchip,auto_pd_dis_freq",
+	ret |= of_property_read_u32(np, "rockchip,sr-idle-ns",
-				    &timing->auto_pd_dis_freq);
+				    &data->sr_idle_ns);
-	ret |= of_property_read_u32(np, "rockchip,dram_dll_dis_freq",
+	ret |= of_property_read_u32(np, "rockchip,sr-mc-gate-idle-ns",
-				    &timing->dram_dll_dis_freq);
+				    &data->sr_mc_gate_idle_ns);
-	ret |= of_property_read_u32(np, "rockchip,phy_dll_dis_freq",
+	ret |= of_property_read_u32(np, "rockchip,srpd-lite-idle-ns",
-				    &timing->phy_dll_dis_freq);
+				    &data->srpd_lite_idle_ns);
+	ret |= of_property_read_u32(np, "rockchip,standby-idle-ns",
+				    &data->standby_idle_ns);
 	ret |= of_property_read_u32(np, "rockchip,ddr3_odt_dis_freq",
-				    &timing->ddr3_odt_dis_freq);
+				    &data->ddr3_odt_dis_freq);
-	ret |= of_property_read_u32(np, "rockchip,ddr3_drv",
-				    &timing->ddr3_drv);
-	ret |= of_property_read_u32(np, "rockchip,ddr3_odt",
-				    &timing->ddr3_odt);
-	ret |= of_property_read_u32(np, "rockchip,phy_ddr3_ca_drv",
-				    &timing->phy_ddr3_ca_drv);
-	ret |= of_property_read_u32(np, "rockchip,phy_ddr3_dq_drv",
-				    &timing->phy_ddr3_dq_drv);
-	ret |= of_property_read_u32(np, "rockchip,phy_ddr3_odt",
-				    &timing->phy_ddr3_odt);
 	ret |= of_property_read_u32(np, "rockchip,lpddr3_odt_dis_freq",
-				    &timing->lpddr3_odt_dis_freq);
+				    &data->lpddr3_odt_dis_freq);
-	ret |= of_property_read_u32(np, "rockchip,lpddr3_drv",
-				    &timing->lpddr3_drv);
-	ret |= of_property_read_u32(np, "rockchip,lpddr3_odt",
-				    &timing->lpddr3_odt);
-	ret |= of_property_read_u32(np, "rockchip,phy_lpddr3_ca_drv",
-				    &timing->phy_lpddr3_ca_drv);
-	ret |= of_property_read_u32(np, "rockchip,phy_lpddr3_dq_drv",
-				    &timing->phy_lpddr3_dq_drv);
-	ret |= of_property_read_u32(np, "rockchip,phy_lpddr3_odt",
-				    &timing->phy_lpddr3_odt);
 	ret |= of_property_read_u32(np, "rockchip,lpddr4_odt_dis_freq",
-				    &timing->lpddr4_odt_dis_freq);
+				    &data->lpddr4_odt_dis_freq);
-	ret |= of_property_read_u32(np, "rockchip,lpddr4_drv",
+
-				    &timing->lpddr4_drv);
+	ret |= of_property_read_u32(np, "rockchip,pd-idle-dis-freq-hz",
-	ret |= of_property_read_u32(np, "rockchip,lpddr4_dq_odt",
+				    &data->pd_idle_dis_freq);
-				    &timing->lpddr4_dq_odt);
+	ret |= of_property_read_u32(np, "rockchip,sr-idle-dis-freq-hz",
-	ret |= of_property_read_u32(np, "rockchip,lpddr4_ca_odt",
+				    &data->sr_idle_dis_freq);
-				    &timing->lpddr4_ca_odt);
+	ret |= of_property_read_u32(np, "rockchip,sr-mc-gate-idle-dis-freq-hz",
-	ret |= of_property_read_u32(np, "rockchip,phy_lpddr4_ca_drv",
+				    &data->sr_mc_gate_idle_dis_freq);
-				    &timing->phy_lpddr4_ca_drv);
+	ret |= of_property_read_u32(np, "rockchip,srpd-lite-idle-dis-freq-hz",
-	ret |= of_property_read_u32(np, "rockchip,phy_lpddr4_ck_cs_drv",
+				    &data->srpd_lite_idle_dis_freq);
-				    &timing->phy_lpddr4_ck_cs_drv);
+	ret |= of_property_read_u32(np, "rockchip,standby-idle-dis-freq-hz",
-	ret |= of_property_read_u32(np, "rockchip,phy_lpddr4_dq_drv",
+				    &data->standby_idle_dis_freq);
-				    &timing->phy_lpddr4_dq_drv);
-	ret |= of_property_read_u32(np, "rockchip,phy_lpddr4_odt",
-				    &timing->phy_lpddr4_odt);
 
 	return ret;
 }
@@ -311,8 +336,7 @@ static int rk3399_dmcfreq_probe(struct platform_device *pdev)
 	struct device *dev = &pdev->dev;
 	struct device_node *np = pdev->dev.of_node, *node;
 	struct rk3399_dmcfreq *data;
-	int ret, index, size;
+	int ret;
-	uint32_t *timing;
 	struct dev_pm_opp *opp;
 	u32 ddr_type;
 	u32 val;
@@ -343,26 +367,7 @@ static int rk3399_dmcfreq_probe(struct platform_device *pdev)
 		return ret;
 	}
 
-	/*
+	rk3399_dmcfreq_of_props(data, np);
-	 * Get dram timing and pass it to arm trust firmware,
-	 * the dram driver in arm trust firmware will get these
-	 * timing and to do dram initial.
-	 */
-	if (!of_get_ddr_timings(&data->timing, np)) {
-		timing = &data->timing.ddr3_speed_bin;
-		size = sizeof(struct dram_timing) / 4;
-		for (index = 0; index < size; index++) {
-			arm_smccc_smc(ROCKCHIP_SIP_DRAM_FREQ, *timing++, index,
-				      ROCKCHIP_SIP_CONFIG_DRAM_SET_PARAM,
-				      0, 0, 0, 0, &res);
-			if (res.a0) {
-				dev_err(dev, "Failed to set dram param: %ld\n",
-					res.a0);
-				ret = -EINVAL;
-				goto err_edev;
-			}
-		}
-	}
 
 	node = of_parse_phandle(np, "rockchip,pmu", 0);
 	if (!node)
@@ -381,13 +386,13 @@ static int rk3399_dmcfreq_probe(struct platform_device *pdev)
 
 	switch (ddr_type) {
 	case RK3399_PMUGRF_DDRTYPE_DDR3:
-		data->odt_dis_freq = data->timing.ddr3_odt_dis_freq;
+		data->odt_dis_freq = data->ddr3_odt_dis_freq;
 		break;
 	case RK3399_PMUGRF_DDRTYPE_LPDDR3:
-		data->odt_dis_freq = data->timing.lpddr3_odt_dis_freq;
+		data->odt_dis_freq = data->lpddr3_odt_dis_freq;
 		break;
 	case RK3399_PMUGRF_DDRTYPE_LPDDR4:
-		data->odt_dis_freq = data->timing.lpddr4_odt_dis_freq;
+		data->odt_dis_freq = data->lpddr4_odt_dis_freq;
 		break;
 	default:
 		ret = -EINVAL;
@@ -399,63 +404,46 @@ static int rk3399_dmcfreq_probe(struct platform_device *pdev)
 		      ROCKCHIP_SIP_CONFIG_DRAM_INIT,
 		      0, 0, 0, 0, &res);
 
-	/*
-	 * In TF-A there is a platform SIP call to set the PD (power-down)
-	 * timings and to enable or disable the ODT (on-die termination).
-	 * This call needs three arguments as follows:
-	 *
-	 * arg0:
-	 *     bit[0-7]   : sr_idle
-	 *     bit[8-15]  : sr_mc_gate_idle
-	 *     bit[16-31] : standby idle
-	 * arg1:
-	 *     bit[0-11]  : pd_idle
-	 *     bit[16-27] : srpd_lite_idle
-	 * arg2:
-	 *     bit[0]     : odt enable
-	 */
-	data->odt_pd_arg0 = (data->timing.sr_idle & 0xff) |
-			    ((data->timing.sr_mc_gate_idle & 0xff) << 8) |
-			    ((data->timing.standby_idle & 0xffff) << 16);
-	data->odt_pd_arg1 = (data->timing.pd_idle & 0xfff) |
-			    ((data->timing.srpd_lite_idle & 0xfff) << 16);
-
 	/*
 	 * We add a devfreq driver to our parent since it has a device tree node
 	 * with operating points.
 	 */
-	if (dev_pm_opp_of_add_table(dev)) {
+	if (devm_pm_opp_of_add_table(dev)) {
 		dev_err(dev, "Invalid operating-points in device tree.\n");
 		ret = -EINVAL;
 		goto err_edev;
 	}
 
-	of_property_read_u32(np, "upthreshold",
+	data->ondemand_data.upthreshold = 25;
-			     &data->ondemand_data.upthreshold);
+	data->ondemand_data.downdifferential = 15;
-	of_property_read_u32(np, "downdifferential",
-			     &data->ondemand_data.downdifferential);
 
 	data->rate = clk_get_rate(data->dmc_clk);
 
 	opp = devfreq_recommended_opp(dev, &data->rate, 0);
 	if (IS_ERR(opp)) {
 		ret = PTR_ERR(opp);
-		goto err_free_opp;
+		goto err_edev;
 	}
 
 	data->rate = dev_pm_opp_get_freq(opp);
 	data->volt = dev_pm_opp_get_voltage(opp);
 	dev_pm_opp_put(opp);
 
-	rk3399_devfreq_dmc_profile.initial_freq = data->rate;
+	data->profile = (struct devfreq_dev_profile) {
+		.polling_ms	= 200,
+		.target		= rk3399_dmcfreq_target,
+		.get_dev_status	= rk3399_dmcfreq_get_dev_status,
+		.get_cur_freq	= rk3399_dmcfreq_get_cur_freq,
+		.initial_freq	= data->rate,
+	};
 
 	data->devfreq = devm_devfreq_add_device(dev,
-					   &rk3399_devfreq_dmc_profile,
+					   &data->profile,
 					   DEVFREQ_GOV_SIMPLE_ONDEMAND,
 					   &data->ondemand_data);
 	if (IS_ERR(data->devfreq)) {
 		ret = PTR_ERR(data->devfreq);
-		goto err_free_opp;
+		goto err_edev;
 	}
 
 	devm_devfreq_register_opp_notifier(dev, data->devfreq);
@@ -465,8 +453,6 @@ static int rk3399_dmcfreq_probe(struct platform_device *pdev)
 
 	return 0;
 
-err_free_opp:
-	dev_pm_opp_of_remove_table(&pdev->dev);
 err_edev:
 	devfreq_event_disable_edev(data->edev);
 
@@ -477,11 +463,7 @@ static int rk3399_dmcfreq_remove(struct platform_device *pdev)
 {
 	struct rk3399_dmcfreq *dmcfreq = dev_get_drvdata(&pdev->dev);
 
-	/*
+	devfreq_event_disable_edev(dmcfreq->edev);
-	 * Before remove the opp table we need to unregister the opp notifier.
-	 */
-	devm_devfreq_unregister_opp_notifier(dmcfreq->dev, dmcfreq->devfreq);
-	dev_pm_opp_of_remove_table(dmcfreq->dev);
 
 	return 0;
 }

drivers/idle/intel_idle.c

@@ -764,6 +764,106 @@ static struct cpuidle_state icx_cstates[] __initdata = {
 		.enter = NULL }
 };
 
+/*
+ * On AlderLake C1 has to be disabled if C1E is enabled, and vice versa.
+ * C1E is enabled only if "C1E promotion" bit is set in MSR_IA32_POWER_CTL.
+ * But in this case there is effectively no C1, because C1 requests are
+ * promoted to C1E. If the "C1E promotion" bit is cleared, then both C1
+ * and C1E requests end up with C1, so there is effectively no C1E.
+ *
+ * By default we enable C1E and disable C1 by marking it with
+ * 'CPUIDLE_FLAG_UNUSABLE'.
+ */
+static struct cpuidle_state adl_cstates[] __initdata = {
+	{
+		.name = "C1",
+		.desc = "MWAIT 0x00",
+		.flags = MWAIT2flg(0x00) | CPUIDLE_FLAG_UNUSABLE,
+		.exit_latency = 1,
+		.target_residency = 1,
+		.enter = &intel_idle,
+		.enter_s2idle = intel_idle_s2idle, },
+	{
+		.name = "C1E",
+		.desc = "MWAIT 0x01",
+		.flags = MWAIT2flg(0x01) | CPUIDLE_FLAG_ALWAYS_ENABLE,
+		.exit_latency = 2,
+		.target_residency = 4,
+		.enter = &intel_idle,
+		.enter_s2idle = intel_idle_s2idle, },
+	{
+		.name = "C6",
+		.desc = "MWAIT 0x20",
+		.flags = MWAIT2flg(0x20) | CPUIDLE_FLAG_TLB_FLUSHED,
+		.exit_latency = 220,
+		.target_residency = 600,
+		.enter = &intel_idle,
+		.enter_s2idle = intel_idle_s2idle, },
+	{
+		.name = "C8",
+		.desc = "MWAIT 0x40",
+		.flags = MWAIT2flg(0x40) | CPUIDLE_FLAG_TLB_FLUSHED,
+		.exit_latency = 280,
+		.target_residency = 800,
+		.enter = &intel_idle,
+		.enter_s2idle = intel_idle_s2idle, },
+	{
+		.name = "C10",
+		.desc = "MWAIT 0x60",
+		.flags = MWAIT2flg(0x60) | CPUIDLE_FLAG_TLB_FLUSHED,
+		.exit_latency = 680,
+		.target_residency = 2000,
+		.enter = &intel_idle,
+		.enter_s2idle = intel_idle_s2idle, },
+	{
+		.enter = NULL }
+};
+
+static struct cpuidle_state adl_l_cstates[] __initdata = {
+	{
+		.name = "C1",
+		.desc = "MWAIT 0x00",
+		.flags = MWAIT2flg(0x00) | CPUIDLE_FLAG_UNUSABLE,
+		.exit_latency = 1,
+		.target_residency = 1,
+		.enter = &intel_idle,
+		.enter_s2idle = intel_idle_s2idle, },
+	{
+		.name = "C1E",
+		.desc = "MWAIT 0x01",
+		.flags = MWAIT2flg(0x01) | CPUIDLE_FLAG_ALWAYS_ENABLE,
+		.exit_latency = 2,
+		.target_residency = 4,
+		.enter = &intel_idle,
+		.enter_s2idle = intel_idle_s2idle, },
+	{
+		.name = "C6",
+		.desc = "MWAIT 0x20",
+		.flags = MWAIT2flg(0x20) | CPUIDLE_FLAG_TLB_FLUSHED,
+		.exit_latency = 170,
+		.target_residency = 500,
+		.enter = &intel_idle,
+		.enter_s2idle = intel_idle_s2idle, },
+	{
+		.name = "C8",
+		.desc = "MWAIT 0x40",
+		.flags = MWAIT2flg(0x40) | CPUIDLE_FLAG_TLB_FLUSHED,
+		.exit_latency = 200,
+		.target_residency = 600,
+		.enter = &intel_idle,
+		.enter_s2idle = intel_idle_s2idle, },
+	{
+		.name = "C10",
+		.desc = "MWAIT 0x60",
+		.flags = MWAIT2flg(0x60) | CPUIDLE_FLAG_TLB_FLUSHED,
+		.exit_latency = 230,
+		.target_residency = 700,
+		.enter = &intel_idle,
+		.enter_s2idle = intel_idle_s2idle, },
+	{
+		.enter = NULL }
+};
+
 /*
  * On Sapphire Rapids Xeon C1 has to be disabled if C1E is enabled, and vice
  * versa. On SPR C1E is enabled only if "C1E promotion" bit is set in
@@ -1147,6 +1247,14 @@ static const struct idle_cpu idle_cpu_icx __initconst = {
 	.use_acpi = true,
 };
 
+static const struct idle_cpu idle_cpu_adl __initconst = {
+	.state_table = adl_cstates,
+};
+
+static const struct idle_cpu idle_cpu_adl_l __initconst = {
+	.state_table = adl_l_cstates,
+};
+
 static const struct idle_cpu idle_cpu_spr __initconst = {
 	.state_table = spr_cstates,
 	.disable_promotion_to_c1e = true,
@@ -1215,6 +1323,8 @@ static const struct x86_cpu_id intel_idle_ids[] __initconst = {
 	X86_MATCH_INTEL_FAM6_MODEL(SKYLAKE_X,		&idle_cpu_skx),
 	X86_MATCH_INTEL_FAM6_MODEL(ICELAKE_X,		&idle_cpu_icx),
 	X86_MATCH_INTEL_FAM6_MODEL(ICELAKE_D,		&idle_cpu_icx),
+	X86_MATCH_INTEL_FAM6_MODEL(ALDERLAKE,		&idle_cpu_adl),
+	X86_MATCH_INTEL_FAM6_MODEL(ALDERLAKE_L,		&idle_cpu_adl_l),
 	X86_MATCH_INTEL_FAM6_MODEL(SAPPHIRERAPIDS_X,	&idle_cpu_spr),
 	X86_MATCH_INTEL_FAM6_MODEL(XEON_PHI_KNL,	&idle_cpu_knl),
 	X86_MATCH_INTEL_FAM6_MODEL(XEON_PHI_KNM,	&idle_cpu_knl),
@@ -1573,6 +1683,25 @@ static void __init skx_idle_state_table_update(void)
 	}
 }
 
+/**
+ * adl_idle_state_table_update - Adjust AlderLake idle states table.
+ */
+static void __init adl_idle_state_table_update(void)
+{
+	/* Check if user prefers C1 over C1E. */
+	if (preferred_states_mask & BIT(1) && !(preferred_states_mask & BIT(2))) {
+		cpuidle_state_table[0].flags &= ~CPUIDLE_FLAG_UNUSABLE;
+		cpuidle_state_table[1].flags |= CPUIDLE_FLAG_UNUSABLE;
+
+		/* Disable C1E by clearing the "C1E promotion" bit. */
+		c1e_promotion = C1E_PROMOTION_DISABLE;
+		return;
+	}
+
+	/* Make sure C1E is enabled by default */
+	c1e_promotion = C1E_PROMOTION_ENABLE;
+}
+
 /**
  * spr_idle_state_table_update - Adjust Sapphire Rapids idle states table.
  */
@@ -1642,6 +1771,10 @@ static void __init intel_idle_init_cstates_icpu(struct cpuidle_driver *drv)
 	case INTEL_FAM6_SAPPHIRERAPIDS_X:
 		spr_idle_state_table_update();
 		break;
+	case INTEL_FAM6_ALDERLAKE:
+	case INTEL_FAM6_ALDERLAKE_L:
+		adl_idle_state_table_update();
+		break;
 	}
 
 	for (cstate = 0; cstate < CPUIDLE_STATE_MAX; ++cstate) {

drivers/iio/chemical/scd30.h

@@ -68,10 +68,7 @@ struct scd30_state {
 	scd30_command_t command;
 };
 
-int scd30_suspend(struct device *dev);
+extern const struct dev_pm_ops scd30_pm_ops;
-int scd30_resume(struct device *dev);
-
-static __maybe_unused SIMPLE_DEV_PM_OPS(scd30_pm_ops, scd30_suspend, scd30_resume);
 
 int scd30_probe(struct device *dev, int irq, const char *name, void *priv, scd30_command_t command);
 

drivers/iio/chemical/scd30_core.c

@@ -517,7 +517,7 @@ static const struct iio_chan_spec scd30_channels[] = {
 	IIO_CHAN_SOFT_TIMESTAMP(3),
 };
 
-int __maybe_unused scd30_suspend(struct device *dev)
+static int scd30_suspend(struct device *dev)
 {
 	struct iio_dev *indio_dev = dev_get_drvdata(dev);
 	struct scd30_state *state  = iio_priv(indio_dev);
@@ -529,9 +529,8 @@ int __maybe_unused scd30_suspend(struct device *dev)
 
 	return regulator_disable(state->vdd);
 }
-EXPORT_SYMBOL(scd30_suspend);
 
-int __maybe_unused scd30_resume(struct device *dev)
+static int scd30_resume(struct device *dev)
 {
 	struct iio_dev *indio_dev = dev_get_drvdata(dev);
 	struct scd30_state *state = iio_priv(indio_dev);
@@ -543,7 +542,8 @@ int __maybe_unused scd30_resume(struct device *dev)
 
 	return scd30_command_write(state, CMD_START_MEAS, state->pressure_comp);
 }
-EXPORT_SYMBOL(scd30_resume);
+
+EXPORT_NS_SIMPLE_DEV_PM_OPS(scd30_pm_ops, scd30_suspend, scd30_resume, IIO_SCD30);
 
 static void scd30_stop_meas(void *data)
 {
@@ -759,7 +759,7 @@ int scd30_probe(struct device *dev, int irq, const char *name, void *priv,
 
 	return devm_iio_device_register(dev, indio_dev);
 }
-EXPORT_SYMBOL(scd30_probe);
+EXPORT_SYMBOL_NS(scd30_probe, IIO_SCD30);
 
 MODULE_AUTHOR("Tomasz Duszynski <tomasz.duszynski@octakon.com>");
 MODULE_DESCRIPTION("Sensirion SCD30 carbon dioxide sensor core driver");

drivers/iio/chemical/scd30_i2c.c

@@ -128,7 +128,7 @@ static struct i2c_driver scd30_i2c_driver = {
 	.driver = {
 		.name = KBUILD_MODNAME,
 		.of_match_table = scd30_i2c_of_match,
-		.pm = &scd30_pm_ops,
+		.pm = pm_sleep_ptr(&scd30_pm_ops),
 	},
 	.probe_new = scd30_i2c_probe,
 };
@@ -137,3 +137,4 @@ module_i2c_driver(scd30_i2c_driver);
 MODULE_AUTHOR("Tomasz Duszynski <tomasz.duszynski@octakon.com>");
 MODULE_DESCRIPTION("Sensirion SCD30 carbon dioxide sensor i2c driver");
 MODULE_LICENSE("GPL v2");
+MODULE_IMPORT_NS(IIO_SCD30);

drivers/iio/chemical/scd30_serial.c

@@ -252,7 +252,7 @@ static struct serdev_device_driver scd30_serdev_driver = {
 	.driver = {
 		.name = KBUILD_MODNAME,
 		.of_match_table = scd30_serdev_of_match,
-		.pm = &scd30_pm_ops,
+		.pm = pm_sleep_ptr(&scd30_pm_ops),
 	},
 	.probe = scd30_serdev_probe,
 };
@@ -261,3 +261,4 @@ module_serdev_device_driver(scd30_serdev_driver);
 MODULE_AUTHOR("Tomasz Duszynski <tomasz.duszynski@octakon.com>");
 MODULE_DESCRIPTION("Sensirion SCD30 carbon dioxide sensor serial driver");
 MODULE_LICENSE("GPL v2");
+MODULE_IMPORT_NS(IIO_SCD30);

drivers/opp/of.c

@@ -1448,7 +1448,7 @@ EXPORT_SYMBOL_GPL(dev_pm_opp_get_of_node);
  * Returns 0 on success or a proper -EINVAL value in case of error.
  */
 static int __maybe_unused
-_get_dt_power(unsigned long *mW, unsigned long *kHz, struct device *dev)
+_get_dt_power(struct device *dev, unsigned long *mW, unsigned long *kHz)
 {
 	struct dev_pm_opp *opp;
 	unsigned long opp_freq, opp_power;
@@ -1482,8 +1482,8 @@ _get_dt_power(unsigned long *mW, unsigned long *kHz, struct device *dev)
  * Returns -EINVAL if the power calculation failed because of missing
  * parameters, 0 otherwise.
  */
-static int __maybe_unused _get_power(unsigned long *mW, unsigned long *kHz,
+static int __maybe_unused _get_power(struct device *dev, unsigned long *mW,
-				     struct device *dev)
+				     unsigned long *kHz)
 {
 	struct dev_pm_opp *opp;
 	struct device_node *np;

drivers/powercap/dtpm_cpu.c

@@ -211,7 +211,7 @@ static int __dtpm_cpu_setup(int cpu, struct dtpm *parent)
 		return 0;
 
 	pd = em_cpu_get(cpu);
-	if (!pd)
+	if (!pd || em_is_artificial(pd))
 		return -EINVAL;
 
 	dtpm_cpu = kzalloc(sizeof(*dtpm_cpu), GFP_KERNEL);

drivers/powercap/intel_rapl_common.c

@@ -1010,7 +1010,7 @@ static u64 rapl_compute_time_window_atom(struct rapl_package *rp, u64 value,
 	 * where time_unit is default to 1 sec. Never 0.
 	 */
 	if (!to_raw)
-		return (value) ? value *= rp->time_unit : rp->time_unit;
+		return (value) ? value * rp->time_unit : rp->time_unit;
 
 	value = div64_u64(value, rp->time_unit);
 
@@ -1107,6 +1107,8 @@ static const struct x86_cpu_id rapl_ids[] __initconst = {
 	X86_MATCH_INTEL_FAM6_MODEL(ROCKETLAKE,		&rapl_defaults_core),
 	X86_MATCH_INTEL_FAM6_MODEL(ALDERLAKE,		&rapl_defaults_core),
 	X86_MATCH_INTEL_FAM6_MODEL(ALDERLAKE_L,		&rapl_defaults_core),
+	X86_MATCH_INTEL_FAM6_MODEL(ALDERLAKE_N,		&rapl_defaults_core),
+	X86_MATCH_INTEL_FAM6_MODEL(RAPTORLAKE,		&rapl_defaults_core),
 	X86_MATCH_INTEL_FAM6_MODEL(SAPPHIRERAPIDS_X,	&rapl_defaults_spr_server),
 	X86_MATCH_INTEL_FAM6_MODEL(LAKEFIELD,		&rapl_defaults_core),
 

drivers/powercap/intel_rapl_msr.c

@@ -140,6 +140,7 @@ static const struct x86_cpu_id pl4_support_ids[] = {
 	{ X86_VENDOR_INTEL, 6, INTEL_FAM6_TIGERLAKE_L, X86_FEATURE_ANY },
 	{ X86_VENDOR_INTEL, 6, INTEL_FAM6_ALDERLAKE, X86_FEATURE_ANY },
 	{ X86_VENDOR_INTEL, 6, INTEL_FAM6_ALDERLAKE_L, X86_FEATURE_ANY },
+	{ X86_VENDOR_INTEL, 6, INTEL_FAM6_RAPTORLAKE, X86_FEATURE_ANY },
 	{}
 };
 

drivers/soc/rockchip/pm_domains.c

@@ -8,6 +8,7 @@
 #include <linux/io.h>
 #include <linux/iopoll.h>
 #include <linux/err.h>
+#include <linux/mutex.h>
 #include <linux/pm_clock.h>
 #include <linux/pm_domain.h>
 #include <linux/of_address.h>
@@ -16,6 +17,7 @@
 #include <linux/clk.h>
 #include <linux/regmap.h>
 #include <linux/mfd/syscon.h>
+#include <soc/rockchip/pm_domains.h>
 #include <dt-bindings/power/px30-power.h>
 #include <dt-bindings/power/rk3036-power.h>
 #include <dt-bindings/power/rk3066-power.h>
@@ -139,6 +141,109 @@ struct rockchip_pmu {
 #define DOMAIN_RK3568(name, pwr, req, wakeup)		\
 	DOMAIN_M(name, pwr, pwr, req, req, req, wakeup)
 
+/*
+ * Dynamic Memory Controller may need to coordinate with us -- see
+ * rockchip_pmu_block().
+ *
+ * dmc_pmu_mutex protects registration-time races, so DMC driver doesn't try to
+ * block() while we're initializing the PMU.
+ */
+static DEFINE_MUTEX(dmc_pmu_mutex);
+static struct rockchip_pmu *dmc_pmu;
+
+/*
+ * Block PMU transitions and make sure they don't interfere with ARM Trusted
+ * Firmware operations. There are two conflicts, noted in the comments below.
+ *
+ * Caller must unblock PMU transitions via rockchip_pmu_unblock().
+ */
+int rockchip_pmu_block(void)
+{
+	struct rockchip_pmu *pmu;
+	struct generic_pm_domain *genpd;
+	struct rockchip_pm_domain *pd;
+	int i, ret;
+
+	mutex_lock(&dmc_pmu_mutex);
+
+	/* No PMU (yet)? Then we just block rockchip_pmu_probe(). */
+	if (!dmc_pmu)
+		return 0;
+	pmu = dmc_pmu;
+
+	/*
+	 * mutex blocks all idle transitions: we can't touch the
+	 * PMU_BUS_IDLE_REQ (our ".idle_offset") register while ARM Trusted
+	 * Firmware might be using it.
+	 */
+	mutex_lock(&pmu->mutex);
+
+	/*
+	 * Power domain clocks: Per Rockchip, we *must* keep certain clocks
+	 * enabled for the duration of power-domain transitions. Most
+	 * transitions are handled by this driver, but some cases (in
+	 * particular, DRAM DVFS / memory-controller idle) must be handled by
+	 * firmware. Firmware can handle most clock management via a special
+	 * "ungate" register (PMU_CRU_GATEDIS_CON0), but unfortunately, this
+	 * doesn't handle PLLs. We can assist this transition by doing the
+	 * clock management on behalf of firmware.
+	 */
+	for (i = 0; i < pmu->genpd_data.num_domains; i++) {
+		genpd = pmu->genpd_data.domains[i];
+		if (genpd) {
+			pd = to_rockchip_pd(genpd);
+			ret = clk_bulk_enable(pd->num_clks, pd->clks);
+			if (ret < 0) {
+				dev_err(pmu->dev,
+					"failed to enable clks for domain '%s': %d\n",
+					genpd->name, ret);
+				goto err;
+			}
+		}
+	}
+
+	return 0;
+
+err:
+	for (i = i - 1; i >= 0; i--) {
+		genpd = pmu->genpd_data.domains[i];
+		if (genpd) {
+			pd = to_rockchip_pd(genpd);
+			clk_bulk_disable(pd->num_clks, pd->clks);
+		}
+	}
+	mutex_unlock(&pmu->mutex);
+	mutex_unlock(&dmc_pmu_mutex);
+
+	return ret;
+}
+EXPORT_SYMBOL_GPL(rockchip_pmu_block);
+
+/* Unblock PMU transitions. */
+void rockchip_pmu_unblock(void)
+{
+	struct rockchip_pmu *pmu;
+	struct generic_pm_domain *genpd;
+	struct rockchip_pm_domain *pd;
+	int i;
+
+	if (dmc_pmu) {
+		pmu = dmc_pmu;
+		for (i = 0; i < pmu->genpd_data.num_domains; i++) {
+			genpd = pmu->genpd_data.domains[i];
+			if (genpd) {
+				pd = to_rockchip_pd(genpd);
+				clk_bulk_disable(pd->num_clks, pd->clks);
+			}
+		}
+
+		mutex_unlock(&pmu->mutex);
+	}
+
+	mutex_unlock(&dmc_pmu_mutex);
+}
+EXPORT_SYMBOL_GPL(rockchip_pmu_unblock);
+
 static bool rockchip_pmu_domain_is_idle(struct rockchip_pm_domain *pd)
 {
 	struct rockchip_pmu *pmu = pd->pmu;
@@ -690,6 +795,12 @@ static int rockchip_pm_domain_probe(struct platform_device *pdev)
 
 	error = -ENODEV;
 
+	/*
+	 * Prevent any rockchip_pmu_block() from racing with the remainder of
+	 * setup (clocks, register initialization).
+	 */
+	mutex_lock(&dmc_pmu_mutex);
+
 	for_each_available_child_of_node(np, node) {
 		error = rockchip_pm_add_one_domain(pmu, node);
 		if (error) {
@@ -719,10 +830,17 @@ static int rockchip_pm_domain_probe(struct platform_device *pdev)
 		goto err_out;
 	}
 
+	/* We only expect one PMU. */
+	if (!WARN_ON_ONCE(dmc_pmu))
+		dmc_pmu = pmu;
+
+	mutex_unlock(&dmc_pmu_mutex);
+
 	return 0;
 
 err_out:
 	rockchip_pm_domain_cleanup(pmu);
+	mutex_unlock(&dmc_pmu_mutex);
 	return error;
 }
 

drivers/thermal/cpufreq_cooling.c

@@ -328,7 +328,7 @@ static inline bool em_is_sane(struct cpufreq_cooling_device *cpufreq_cdev,
 	struct cpufreq_policy *policy;
 	unsigned int nr_levels;
 
-	if (!em)
+	if (!em || em_is_artificial(em))
 		return false;
 
 	policy = cpufreq_cdev->policy;

drivers/thermal/devfreq_cooling.c

@@ -358,6 +358,7 @@ of_devfreq_cooling_register_power(struct device_node *np, struct devfreq *df,
 	struct thermal_cooling_device *cdev;
 	struct device *dev = df->dev.parent;
 	struct devfreq_cooling_device *dfc;
+	struct em_perf_domain *em;
 	char *name;
 	int err, num_opps;
 
@@ -367,8 +368,9 @@ of_devfreq_cooling_register_power(struct device_node *np, struct devfreq *df,
 
 	dfc->devfreq = df;
 
-	dfc->em_pd = em_pd_get(dev);
+	em = em_pd_get(dev);
-	if (dfc->em_pd) {
+	if (em && !em_is_artificial(em)) {
+		dfc->em_pd = em;
 		devfreq_cooling_ops.get_requested_power =
 			devfreq_cooling_get_requested_power;
 		devfreq_cooling_ops.state2power = devfreq_cooling_state2power;
@@ -379,7 +381,7 @@ of_devfreq_cooling_register_power(struct device_node *np, struct devfreq *df,
 		num_opps = em_pd_nr_perf_states(dfc->em_pd);
 	} else {
 		/* Backward compatibility for drivers which do not use IPA */
-		dev_dbg(dev, "missing EM for cooling device\n");
+		dev_dbg(dev, "missing proper EM for cooling device\n");
 
 		num_opps = dev_pm_opp_get_opp_count(dev);
 

include/acpi/cppc_acpi.h

@@ -141,6 +141,7 @@ extern int cppc_set_perf(int cpu, struct cppc_perf_ctrls *perf_ctrls);
 extern int cppc_set_enable(int cpu, bool enable);
 extern int cppc_get_perf_caps(int cpu, struct cppc_perf_caps *caps);
 extern bool acpi_cpc_valid(void);
+extern bool cppc_allow_fast_switch(void);
 extern int acpi_get_psd_map(unsigned int cpu, struct cppc_cpudata *cpu_data);
 extern unsigned int cppc_get_transition_latency(int cpu);
 extern bool cpc_ffh_supported(void);
@@ -175,6 +176,10 @@ static inline bool acpi_cpc_valid(void)
 {
 	return false;
 }
+static inline bool cppc_allow_fast_switch(void)
+{
+	return false;
+}
 static inline unsigned int cppc_get_transition_latency(int cpu)
 {
 	return CPUFREQ_ETERNAL;

include/linux/acpi.h

@@ -574,6 +574,7 @@ acpi_status acpi_run_osc(acpi_handle handle, struct acpi_osc_context *context);
 #define OSC_SB_OSLPI_SUPPORT			0x00000100
 #define OSC_SB_CPC_DIVERSE_HIGH_SUPPORT		0x00001000
 #define OSC_SB_GENERIC_INITIATOR_SUPPORT	0x00002000
+#define OSC_SB_CPC_FLEXIBLE_ADR_SPACE		0x00004000
 #define OSC_SB_NATIVE_USB4_SUPPORT		0x00040000
 #define OSC_SB_PRM_SUPPORT			0x00200000
 
@@ -581,6 +582,7 @@ extern bool osc_sb_apei_support_acked;
 extern bool osc_pc_lpi_support_confirmed;
 extern bool osc_sb_native_usb4_support_confirmed;
 extern bool osc_sb_cppc_not_supported;
+extern bool osc_cpc_flexible_adr_space_confirmed;
 
 /* USB4 Capabilities */
 #define OSC_USB_USB3_TUNNELING			0x00000001

include/linux/devfreq.h

@@ -38,6 +38,7 @@ enum devfreq_timer {
 
 struct devfreq;
 struct devfreq_governor;
+struct devfreq_cpu_data;
 struct thermal_cooling_device;
 
 /**
@@ -288,6 +289,11 @@ struct devfreq_simple_ondemand_data {
 #endif
 
 #if IS_ENABLED(CONFIG_DEVFREQ_GOV_PASSIVE)
+enum devfreq_parent_dev_type {
+	DEVFREQ_PARENT_DEV,
+	CPUFREQ_PARENT_DEV,
+};
+
 /**
  * struct devfreq_passive_data - ``void *data`` fed to struct devfreq
  *	and devfreq_add_device
@@ -299,8 +305,11 @@ struct devfreq_simple_ondemand_data {
  *			using governors except for passive governor.
  *			If the devfreq device has the specific method to decide
  *			the next frequency, should use this callback.
+ * @parent_type:	the parent type of the device.
  * @this:		the devfreq instance of own device.
- * @nb:		the notifier block for DEVFREQ_TRANSITION_NOTIFIER list
+ * @nb:			the notifier block for DEVFREQ_TRANSITION_NOTIFIER or
+ *			CPUFREQ_TRANSITION_NOTIFIER list.
+ * @cpu_data_list:	the list of cpu frequency data for all cpufreq_policy.
  *
  * The devfreq_passive_data have to set the devfreq instance of parent
  * device with governors except for the passive governor. But, don't need to
@@ -314,9 +323,13 @@ struct devfreq_passive_data {
 	/* Optional callback to decide the next frequency of passvice device */
 	int (*get_target_freq)(struct devfreq *this, unsigned long *freq);
 
+	/* Should set the type of parent device */
+	enum devfreq_parent_dev_type parent_type;
+
 	/* For passive governor's internal use. Don't need to set them */
 	struct devfreq *this;
 	struct notifier_block nb;
+	struct list_head cpu_data_list;
 };
 #endif
 

include/linux/energy_model.h

@@ -67,11 +67,16 @@ struct em_perf_domain {
  *
  *  EM_PERF_DOMAIN_SKIP_INEFFICIENCIES: Skip inefficient states when estimating
  *  energy consumption.
+ *
+ *  EM_PERF_DOMAIN_ARTIFICIAL: The power values are artificial and might be
+ *  created by platform missing real power information
  */
 #define EM_PERF_DOMAIN_MILLIWATTS BIT(0)
 #define EM_PERF_DOMAIN_SKIP_INEFFICIENCIES BIT(1)
+#define EM_PERF_DOMAIN_ARTIFICIAL BIT(2)
 
 #define em_span_cpus(em) (to_cpumask((em)->cpus))
+#define em_is_artificial(em) ((em)->flags & EM_PERF_DOMAIN_ARTIFICIAL)
 
 #ifdef CONFIG_ENERGY_MODEL
 #define EM_MAX_POWER 0xFFFF
@@ -96,11 +101,11 @@ struct em_data_callback {
 	/**
 	 * active_power() - Provide power at the next performance state of
 	 *		a device
+	 * @dev		: Device for which we do this operation (can be a CPU)
 	 * @power	: Active power at the performance state
 	 *		(modified)
 	 * @freq	: Frequency at the performance state in kHz
 	 *		(modified)
-	 * @dev		: Device for which we do this operation (can be a CPU)
 	 *
 	 * active_power() must find the lowest performance state of 'dev' above
 	 * 'freq' and update 'power' and 'freq' to the matching active power
@@ -112,11 +117,32 @@ struct em_data_callback {
 	 *
 	 * Return 0 on success.
 	 */
-	int (*active_power)(unsigned long *power, unsigned long *freq,
+	int (*active_power)(struct device *dev, unsigned long *power,
-			    struct device *dev);
+			    unsigned long *freq);
+
+	/**
+	 * get_cost() - Provide the cost at the given performance state of
+	 *		a device
+	 * @dev		: Device for which we do this operation (can be a CPU)
+	 * @freq	: Frequency at the performance state in kHz
+	 * @cost	: The cost value for the performance state
+	 *		(modified)
+	 *
+	 * In case of CPUs, the cost is the one of a single CPU in the domain.
+	 * It is expected to fit in the [0, EM_MAX_POWER] range due to internal
+	 * usage in EAS calculation.
+	 *
+	 * Return 0 on success, or appropriate error value in case of failure.
+	 */
+	int (*get_cost)(struct device *dev, unsigned long freq,
+			unsigned long *cost);
 };
-#define EM_DATA_CB(_active_power_cb) { .active_power = &_active_power_cb }
 #define EM_SET_ACTIVE_POWER_CB(em_cb, cb) ((em_cb).active_power = cb)
+#define EM_ADV_DATA_CB(_active_power_cb, _cost_cb)	\
+	{ .active_power = _active_power_cb,		\
+	  .get_cost = _cost_cb }
+#define EM_DATA_CB(_active_power_cb)			\
+		EM_ADV_DATA_CB(_active_power_cb, NULL)
 
 struct em_perf_domain *em_cpu_get(int cpu);
 struct em_perf_domain *em_pd_get(struct device *dev);
@@ -264,6 +290,7 @@ static inline int em_pd_nr_perf_states(struct em_perf_domain *pd)
 
 #else
 struct em_data_callback {};
+#define EM_ADV_DATA_CB(_active_power_cb, _cost_cb) { }
 #define EM_DATA_CB(_active_power_cb) { }
 #define EM_SET_ACTIVE_POWER_CB(em_cb, cb) do { } while (0)
 

include/linux/pm.h

@@ -368,13 +368,13 @@ const struct dev_pm_ops name = { \
 
 #ifdef CONFIG_PM
 #define _EXPORT_DEV_PM_OPS(name, suspend_fn, resume_fn, runtime_suspend_fn, \
-			   runtime_resume_fn, idle_fn, sec) \
+			   runtime_resume_fn, idle_fn, sec, ns)		\
 	_DEFINE_DEV_PM_OPS(name, suspend_fn, resume_fn, runtime_suspend_fn, \
 			   runtime_resume_fn, idle_fn); \
-	_EXPORT_SYMBOL(name, sec)
+	__EXPORT_SYMBOL(name, sec, ns)
 #else
 #define _EXPORT_DEV_PM_OPS(name, suspend_fn, resume_fn, runtime_suspend_fn, \
-			   runtime_resume_fn, idle_fn, sec) \
+			   runtime_resume_fn, idle_fn, sec, ns) \
 static __maybe_unused _DEFINE_DEV_PM_OPS(__static_##name, suspend_fn, \
 					 resume_fn, runtime_suspend_fn, \
 					 runtime_resume_fn, idle_fn)
@@ -391,9 +391,13 @@ static __maybe_unused _DEFINE_DEV_PM_OPS(__static_##name, suspend_fn, \
 	_DEFINE_DEV_PM_OPS(name, suspend_fn, resume_fn, NULL, NULL, NULL)
 
 #define EXPORT_SIMPLE_DEV_PM_OPS(name, suspend_fn, resume_fn) \
-	_EXPORT_DEV_PM_OPS(name, suspend_fn, resume_fn, NULL, NULL, NULL, "")
+	_EXPORT_DEV_PM_OPS(name, suspend_fn, resume_fn, NULL, NULL, NULL, "", "")
 #define EXPORT_GPL_SIMPLE_DEV_PM_OPS(name, suspend_fn, resume_fn) \
-	_EXPORT_DEV_PM_OPS(name, suspend_fn, resume_fn, NULL, NULL, NULL, "_gpl")
+	_EXPORT_DEV_PM_OPS(name, suspend_fn, resume_fn, NULL, NULL, NULL, "_gpl", "")
+#define EXPORT_NS_SIMPLE_DEV_PM_OPS(name, suspend_fn, resume_fn, ns)	\
+	_EXPORT_DEV_PM_OPS(name, suspend_fn, resume_fn, NULL, NULL, NULL, "", #ns)
+#define EXPORT_NS_GPL_SIMPLE_DEV_PM_OPS(name, suspend_fn, resume_fn, ns)	\
+	_EXPORT_DEV_PM_OPS(name, suspend_fn, resume_fn, NULL, NULL, NULL, "_gpl", #ns)
 
 /* Deprecated. Use DEFINE_SIMPLE_DEV_PM_OPS() instead. */
 #define SIMPLE_DEV_PM_OPS(name, suspend_fn, resume_fn) \

include/linux/pm_domain.h

@@ -91,6 +91,14 @@ struct gpd_dev_ops {
 	int (*stop)(struct device *dev);
 };
 
+struct genpd_governor_data {
+	s64 max_off_time_ns;
+	bool max_off_time_changed;
+	ktime_t next_wakeup;
+	bool cached_power_down_ok;
+	bool cached_power_down_state_idx;
+};
+
 struct genpd_power_state {
 	s64 power_off_latency_ns;
 	s64 power_on_latency_ns;
@@ -98,7 +106,7 @@ struct genpd_power_state {
 	u64 usage;
 	u64 rejected;
 	struct fwnode_handle *fwnode;
-	ktime_t idle_time;
+	u64 idle_time;
 	void *data;
 };
 
@@ -114,6 +122,7 @@ struct generic_pm_domain {
 	struct list_head child_links;	/* Links with PM domain as a child */
 	struct list_head dev_list;	/* List of devices */
 	struct dev_power_governor *gov;
+	struct genpd_governor_data *gd;	/* Data used by a genpd governor. */
 	struct work_struct power_off_work;
 	struct fwnode_handle *provider;	/* Identity of the domain provider */
 	bool has_provider;
@@ -134,11 +143,6 @@ struct generic_pm_domain {
 	int (*set_performance_state)(struct generic_pm_domain *genpd,
 				     unsigned int state);
 	struct gpd_dev_ops dev_ops;
-	s64 max_off_time_ns;	/* Maximum allowed "suspended" time. */
-	ktime_t next_wakeup;	/* Maintained by the domain governor */
-	bool max_off_time_changed;
-	bool cached_power_down_ok;
-	bool cached_power_down_state_idx;
 	int (*attach_dev)(struct generic_pm_domain *domain,
 			  struct device *dev);
 	void (*detach_dev)(struct generic_pm_domain *domain,
@@ -149,8 +153,8 @@ struct generic_pm_domain {
 			    unsigned int state_count);
 	unsigned int state_count; /* number of states */
 	unsigned int state_idx; /* state that genpd will go to when off */
-	ktime_t on_time;
+	u64 on_time;
-	ktime_t accounting_time;
+	u64 accounting_time;
 	const struct genpd_lock_ops *lock_ops;
 	union {
 		struct mutex mlock;
@@ -182,6 +186,7 @@ struct gpd_timing_data {
 	s64 suspend_latency_ns;
 	s64 resume_latency_ns;
 	s64 effective_constraint_ns;
+	ktime_t	next_wakeup;
 	bool constraint_changed;
 	bool cached_suspend_ok;
 };
@@ -193,14 +198,13 @@ struct pm_domain_data {
 
 struct generic_pm_domain_data {
 	struct pm_domain_data base;
-	struct gpd_timing_data td;
+	struct gpd_timing_data *td;
 	struct notifier_block nb;
 	struct notifier_block *power_nb;
 	int cpu;
 	unsigned int performance_state;
 	unsigned int default_pstate;
 	unsigned int rpm_pstate;
-	ktime_t	next_wakeup;
 	void *data;
 };
 

include/linux/pm_runtime.h

@@ -41,10 +41,16 @@
 
 #define EXPORT_RUNTIME_DEV_PM_OPS(name, suspend_fn, resume_fn, idle_fn) \
 	_EXPORT_DEV_PM_OPS(name, pm_runtime_force_suspend, pm_runtime_force_resume, \
-			   suspend_fn, resume_fn, idle_fn, "")
+			   suspend_fn, resume_fn, idle_fn, "", "")
 #define EXPORT_GPL_RUNTIME_DEV_PM_OPS(name, suspend_fn, resume_fn, idle_fn) \
 	_EXPORT_DEV_PM_OPS(name, pm_runtime_force_suspend, pm_runtime_force_resume, \
-			   suspend_fn, resume_fn, idle_fn, "_gpl")
+			   suspend_fn, resume_fn, idle_fn, "_gpl", "")
+#define EXPORT_NS_RUNTIME_DEV_PM_OPS(name, suspend_fn, resume_fn, idle_fn, ns) \
+	_EXPORT_DEV_PM_OPS(name, pm_runtime_force_suspend, pm_runtime_force_resume, \
+			   suspend_fn, resume_fn, idle_fn, "", #ns)
+#define EXPORT_NS_GPL_RUNTIME_DEV_PM_OPS(name, suspend_fn, resume_fn, idle_fn, ns) \
+	_EXPORT_DEV_PM_OPS(name, pm_runtime_force_suspend, pm_runtime_force_resume, \
+			   suspend_fn, resume_fn, idle_fn, "_gpl", #ns)
 
 #ifdef CONFIG_PM
 extern struct workqueue_struct *pm_wq;

include/linux/suspend.h

@@ -542,22 +542,56 @@ static inline void unlock_system_sleep(void) {}
 #ifdef CONFIG_PM_SLEEP_DEBUG
 extern bool pm_print_times_enabled;
 extern bool pm_debug_messages_on;
-extern __printf(2, 3) void __pm_pr_dbg(bool defer, const char *fmt, ...);
+static inline int pm_dyn_debug_messages_on(void)
+{
+#ifdef CONFIG_DYNAMIC_DEBUG
+	return 1;
+#else
+	return 0;
+#endif
+}
+#ifndef pr_fmt
+#define pr_fmt(fmt) "PM: " fmt
+#endif
+#define __pm_pr_dbg(fmt, ...)					\
+	do {							\
+		if (pm_debug_messages_on)			\
+			printk(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__);	\
+		else if (pm_dyn_debug_messages_on())		\
+			pr_debug(fmt, ##__VA_ARGS__);	\
+	} while (0)
+#define __pm_deferred_pr_dbg(fmt, ...)				\
+	do {							\
+		if (pm_debug_messages_on)			\
+			printk_deferred(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__);	\
+	} while (0)
 #else
 #define pm_print_times_enabled	(false)
 #define pm_debug_messages_on	(false)
 
 #include <linux/printk.h>
 
-#define __pm_pr_dbg(defer, fmt, ...) \
+#define __pm_pr_dbg(fmt, ...) \
-	no_printk(KERN_DEBUG fmt, ##__VA_ARGS__)
+	no_printk(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__)
+#define __pm_deferred_pr_dbg(fmt, ...) \
+	no_printk(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__)
 #endif
 
+/**
+ * pm_pr_dbg - print pm sleep debug messages
+ *
+ * If pm_debug_messages_on is enabled, print message.
+ * If pm_debug_messages_on is disabled and CONFIG_DYNAMIC_DEBUG is enabled,
+ *	print message only from instances explicitly enabled on dynamic debug's
+ *	control.
+ * If pm_debug_messages_on is disabled and CONFIG_DYNAMIC_DEBUG is disabled,
+ *	don't print message.
+ */
 #define pm_pr_dbg(fmt, ...) \
-	__pm_pr_dbg(false, fmt, ##__VA_ARGS__)
+	__pm_pr_dbg(fmt, ##__VA_ARGS__)
 
 #define pm_deferred_pr_dbg(fmt, ...) \
-	__pm_pr_dbg(true, fmt, ##__VA_ARGS__)
+	__pm_deferred_pr_dbg(fmt, ##__VA_ARGS__)
 
 #ifdef CONFIG_PM_AUTOSLEEP
 

include/soc/rockchip/pm_domains.h

@@ -0,0 +1,25 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Copyright 2022, The Chromium OS Authors. All rights reserved.
+ */
+
+#ifndef __SOC_ROCKCHIP_PM_DOMAINS_H__
+#define __SOC_ROCKCHIP_PM_DOMAINS_H__
+
+#ifdef CONFIG_ROCKCHIP_PM_DOMAINS
+
+int rockchip_pmu_block(void);
+void rockchip_pmu_unblock(void);
+
+#else /* CONFIG_ROCKCHIP_PM_DOMAINS */
+
+static inline int rockchip_pmu_block(void)
+{
+	return 0;
+}
+
+static inline void rockchip_pmu_unblock(void) { }
+
+#endif /* CONFIG_ROCKCHIP_PM_DOMAINS */
+
+#endif /* __SOC_ROCKCHIP_PM_DOMAINS_H__ */

kernel/power/Makefile

@@ -1,6 +1,10 @@
 # SPDX-License-Identifier: GPL-2.0
 
-ccflags-$(CONFIG_PM_DEBUG)	:= -DDEBUG
+ifeq ($(CONFIG_DYNAMIC_DEBUG), y)
+CFLAGS_swap.o                   := -DDEBUG
+CFLAGS_snapshot.o               := -DDEBUG
+CFLAGS_energy_model.o           := -DDEBUG
+endif
 
 KASAN_SANITIZE_snapshot.o	:= n
 

kernel/power/energy_model.c

@@ -54,28 +54,15 @@ static int em_debug_cpus_show(struct seq_file *s, void *unused)
 }
 DEFINE_SHOW_ATTRIBUTE(em_debug_cpus);
 
-static int em_debug_units_show(struct seq_file *s, void *unused)
+static int em_debug_flags_show(struct seq_file *s, void *unused)
 {
 	struct em_perf_domain *pd = s->private;
-	char *units = (pd->flags & EM_PERF_DOMAIN_MILLIWATTS) ?
-		"milliWatts" : "bogoWatts";
 
-	seq_printf(s, "%s\n", units);
+	seq_printf(s, "%#lx\n", pd->flags);
 
 	return 0;
 }
-DEFINE_SHOW_ATTRIBUTE(em_debug_units);
+DEFINE_SHOW_ATTRIBUTE(em_debug_flags);
-
-static int em_debug_skip_inefficiencies_show(struct seq_file *s, void *unused)
-{
-	struct em_perf_domain *pd = s->private;
-	int enabled = (pd->flags & EM_PERF_DOMAIN_SKIP_INEFFICIENCIES) ? 1 : 0;
-
-	seq_printf(s, "%d\n", enabled);
-
-	return 0;
-}
-DEFINE_SHOW_ATTRIBUTE(em_debug_skip_inefficiencies);
 
 static void em_debug_create_pd(struct device *dev)
 {
@@ -89,9 +76,8 @@ static void em_debug_create_pd(struct device *dev)
 		debugfs_create_file("cpus", 0444, d, dev->em_pd->cpus,
 				    &em_debug_cpus_fops);
 
-	debugfs_create_file("units", 0444, d, dev->em_pd, &em_debug_units_fops);
+	debugfs_create_file("flags", 0444, d, dev->em_pd,
-	debugfs_create_file("skip-inefficiencies", 0444, d, dev->em_pd,
+			    &em_debug_flags_fops);
-			    &em_debug_skip_inefficiencies_fops);
 
 	/* Create a sub-directory for each performance state */
 	for (i = 0; i < dev->em_pd->nr_perf_states; i++)
@@ -121,7 +107,8 @@ static void em_debug_remove_pd(struct device *dev) {}
 #endif
 
 static int em_create_perf_table(struct device *dev, struct em_perf_domain *pd,
-				int nr_states, struct em_data_callback *cb)
+				int nr_states, struct em_data_callback *cb,
+				unsigned long flags)
 {
 	unsigned long power, freq, prev_freq = 0, prev_cost = ULONG_MAX;
 	struct em_perf_state *table;
@@ -139,7 +126,7 @@ static int em_create_perf_table(struct device *dev, struct em_perf_domain *pd,
 		 * lowest performance state of 'dev' above 'freq' and updates
 		 * 'power' and 'freq' accordingly.
 		 */
-		ret = cb->active_power(&power, &freq, dev);
+		ret = cb->active_power(dev, &power, &freq);
 		if (ret) {
 			dev_err(dev, "EM: invalid perf. state: %d\n",
 				ret);
@@ -173,10 +160,22 @@ static int em_create_perf_table(struct device *dev, struct em_perf_domain *pd,
 	/* Compute the cost of each performance state. */
 	fmax = (u64) table[nr_states - 1].frequency;
 	for (i = nr_states - 1; i >= 0; i--) {
-		unsigned long power_res = em_scale_power(table[i].power);
+		unsigned long power_res, cost;
+
+		if (flags & EM_PERF_DOMAIN_ARTIFICIAL) {
+			ret = cb->get_cost(dev, table[i].frequency, &cost);
+			if (ret || !cost || cost > EM_MAX_POWER) {
+				dev_err(dev, "EM: invalid cost %lu %d\n",
+					cost, ret);
+				goto free_ps_table;
+			}
+		} else {
+			power_res = em_scale_power(table[i].power);
+			cost = div64_u64(fmax * power_res, table[i].frequency);
+		}
+
+		table[i].cost = cost;
 
-		table[i].cost = div64_u64(fmax * power_res,
-					  table[i].frequency);
 		if (table[i].cost >= prev_cost) {
 			table[i].flags = EM_PERF_STATE_INEFFICIENT;
 			dev_dbg(dev, "EM: OPP:%lu is inefficient\n",
@@ -197,7 +196,8 @@ static int em_create_perf_table(struct device *dev, struct em_perf_domain *pd,
 }
 
 static int em_create_pd(struct device *dev, int nr_states,
-			struct em_data_callback *cb, cpumask_t *cpus)
+			struct em_data_callback *cb, cpumask_t *cpus,
+			unsigned long flags)
 {
 	struct em_perf_domain *pd;
 	struct device *cpu_dev;
@@ -215,7 +215,7 @@ static int em_create_pd(struct device *dev, int nr_states,
 			return -ENOMEM;
 	}
 
-	ret = em_create_perf_table(dev, pd, nr_states, cb);
+	ret = em_create_perf_table(dev, pd, nr_states, cb, flags);
 	if (ret) {
 		kfree(pd);
 		return ret;
@@ -259,6 +259,8 @@ static void em_cpufreq_update_efficiencies(struct device *dev)
 			found++;
 	}
 
+	cpufreq_cpu_put(policy);
+
 	if (!found)
 		return;
 
@@ -332,6 +334,7 @@ int em_dev_register_perf_domain(struct device *dev, unsigned int nr_states,
 				bool milliwatts)
 {
 	unsigned long cap, prev_cap = 0;
+	unsigned long flags = 0;
 	int cpu, ret;
 
 	if (!dev || !nr_states || !cb)
@@ -378,12 +381,16 @@ int em_dev_register_perf_domain(struct device *dev, unsigned int nr_states,
 		}
 	}
 
-	ret = em_create_pd(dev, nr_states, cb, cpus);
+	if (milliwatts)
+		flags |= EM_PERF_DOMAIN_MILLIWATTS;
+	else if (cb->get_cost)
+		flags |= EM_PERF_DOMAIN_ARTIFICIAL;
+
+	ret = em_create_pd(dev, nr_states, cb, cpus, flags);
 	if (ret)
 		goto unlock;
 
-	if (milliwatts)
+	dev->em_pd->flags |= flags;
-		dev->em_pd->flags |= EM_PERF_DOMAIN_MILLIWATTS;
 
 	em_cpufreq_update_efficiencies(dev);
 

kernel/power/main.c

@@ -545,35 +545,6 @@ static int __init pm_debug_messages_setup(char *str)
 }
 __setup("pm_debug_messages", pm_debug_messages_setup);
 
-/**
- * __pm_pr_dbg - Print a suspend debug message to the kernel log.
- * @defer: Whether or not to use printk_deferred() to print the message.
- * @fmt: Message format.
- *
- * The message will be emitted if enabled through the pm_debug_messages
- * sysfs attribute.
- */
-void __pm_pr_dbg(bool defer, const char *fmt, ...)
-{
-	struct va_format vaf;
-	va_list args;
-
-	if (!pm_debug_messages_on)
-		return;
-
-	va_start(args, fmt);
-
-	vaf.fmt = fmt;
-	vaf.va = &args;
-
-	if (defer)
-		printk_deferred(KERN_DEBUG "PM: %pV", &vaf);
-	else
-		printk(KERN_DEBUG "PM: %pV", &vaf);
-
-	va_end(args);
-}
-
 #else /* !CONFIG_PM_SLEEP_DEBUG */
 static inline void pm_print_times_init(void) {}
 #endif /* CONFIG_PM_SLEEP_DEBUG */

kernel/power/process.c

@@ -6,9 +6,6 @@
  * Originally from swsusp.
  */
 
-
-#undef DEBUG
-
 #include <linux/interrupt.h>
 #include <linux/oom.h>
 #include <linux/suspend.h>

kernel/power/snapshot.c

@@ -326,7 +326,7 @@ static void *chain_alloc(struct chain_allocator *ca, unsigned int size)
 	return ret;
 }
 
-/**
+/*
  * Data types related to memory bitmaps.
  *
  * Memory bitmap is a structure consisting of many linked lists of
@@ -427,6 +427,10 @@ struct memory_bitmap {
 
 /**
  * alloc_rtree_node - Allocate a new node and add it to the radix tree.
+ * @gfp_mask: GFP mask for the allocation.
+ * @safe_needed: Get pages not used before hibernation (restore only)
+ * @ca: Pointer to a linked list of pages ("a chain") to allocate from
+ * @list: Radix Tree node to add.
  *
  * This function is used to allocate inner nodes as well as the
  * leave nodes of the radix tree. It also adds the node to the
@@ -902,7 +906,7 @@ static bool rtree_next_node(struct memory_bitmap *bm)
 }
 
 /**
- * memory_bm_rtree_next_pfn - Find the next set bit in a memory bitmap.
+ * memory_bm_next_pfn - Find the next set bit in a memory bitmap.
  * @bm: Memory bitmap.
  *
  * Starting from the last returned position this function searches for the next
@@ -1937,7 +1941,7 @@ static inline int get_highmem_buffer(int safe_needed)
 }
 
 /**
- * alloc_highmem_image_pages - Allocate some highmem pages for the image.
+ * alloc_highmem_pages - Allocate some highmem pages for the image.
  *
  * Try to allocate as many pages as needed, but if the number of free highmem
  * pages is less than that, allocate them all.
@@ -2224,7 +2228,7 @@ static int check_header(struct swsusp_info *info)
 }
 
 /**
- * load header - Check the image header and copy the data from it.
+ * load_header - Check the image header and copy the data from it.
  */
 static int load_header(struct swsusp_info *info)
 {

tools/power/x86/turbostat/Makefile

@@ -9,7 +9,7 @@ ifeq ("$(origin O)", "command line")
 endif
 
 turbostat : turbostat.c
-override CFLAGS +=	-O2 -Wall -I../../../include
+override CFLAGS +=	-O2 -Wall -Wextra -I../../../include
 override CFLAGS +=	-DMSRHEADER='"../../../../arch/x86/include/asm/msr-index.h"'
 override CFLAGS +=	-DINTEL_FAMILY_HEADER='"../../../../arch/x86/include/asm/intel-family.h"'
 override CFLAGS +=	-D_FILE_OFFSET_BITS=64

tools/power/x86/turbostat/turbostat.8

@@ -292,7 +292,7 @@ starts a new interval.
 must be run as root.
 Alternatively, non-root users can be enabled to run turbostat this way:
 
-# setcap cap_sys_rawio=ep ./turbostat
+# setcap cap_sys_admin,cap_sys_rawio,cap_sys_nice=+ep ./turbostat
 
 # chmod +r /dev/cpu/*/msr