Commit 8df127456f ("soc/tegra: pmc: Enable XUSB partitions on boot")
was added as a workaround to ensure that the XUSB powergates or domains
were turned on early during boot because as this time the Tegra XHCI
driver did not handle the power domains at all. Now that the Tegra XHCI
driver has been updated to properly managed the power domains, the
workaround to enable the XUSB power domain early has been removed. This
also means that we can now move the initialisation of the powergates
into the PMC driver probe. Therefore, move the powergate initialisation
into the PMC driver probe and return any errors detected. To handle any
errors, functions to cleanup and remove any power-domains registered
with the generic power-domain framework have been added.
Finally the initialisation of the 'powergates_available' bitmask is kept
in the PMC early init function to allow the legacy PMC powergate APIs to
be called during early boot for enabling secondary CPUs on 32-bit Tegra
devices.
Signed-off-by: Jon Hunter <jonathanh@nvidia.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>
Commit 5f84bb1a40 ("soc/tegra: pmc: Add sysfs entries for reset info")
added sysfs entries for Tegra reset source and level. However, these
sysfs are not removed on error and so if the registering of PMC device
is probe deferred, then the next time we attempt to probe the PMC device
warnings such as the following will be displayed on boot ...
sysfs: cannot create duplicate filename '/devices/platform/7000e400.pmc/reset_reason'
Fix this by calling device_remove_file() for each sysfs entry added on
failure. Note that we call device_remove_file() unconditionally without
checking if the sysfs entry was created in the first place, but this
should be OK because kernfs_remove_by_name_ns() will fail silently.
Fixes: 5f84bb1a40 ("soc/tegra: pmc: Add sysfs entries for reset info")
Signed-off-by: Jon Hunter <jonathanh@nvidia.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>
Commit 5f84bb1a40 ("soc/tegra: pmc: Add sysfs entries for reset info")
added support for reading the Tegra reset source and level from sysfs.
However, there are a few issues with this commit which are ...
1. The number of reset sources for Tegra210 is defined as 5 but it
should be 6.
2. The number of reset sources for Tegra186 is defined as 13 but it
should be 15.
3. The SoC data variables num_reset_sources and num_reset_levels are
defined but never used.
Fix the above by ...
1. Removing the reset source 'AOTAG' from the tegra30_reset_sources
because this is only applicable for Tegra210.
2. Adding a new tegra210_reset_sources structure for Tegra210 reset
sources.
3. Correct the number of reset sources for Tegra210 and Tegra186 by
using the ARRAY_SIZE macro.
4. Updating the functions reset_reason_show() and reset_level_show()
to check whether the value read is valid. While we are at it
clean-up these functions to remove an unnecessary u32 variable.
Fixes: 5f84bb1a40 ("soc/tegra: pmc: Add sysfs entries for reset info")
Signed-off-by: Jon Hunter <jonathanh@nvidia.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>
By implementing the acquire/release protocol, the resets can be shared
with other drivers that also adhere to this protocol. This will be used
for example by the SOR driver to put hardware into a known good state,
irrespective of whether or not the power domain can be reset.
Signed-off-by: Thierry Reding <treding@nvidia.com>
On Tegra210 systems with new enough boot software, direct register
accesses to PMC register space from the non-secure world are not
allowed. Instead a monitor call may be used to read and write PMC
registers.
Add code to detect such a system by attempting to write a scratch
register and detecting if the write happened or not. If not, we switch
to doing all register accesses through the monitor call.
Signed-off-by: Mikko Perttunen <mperttunen@nvidia.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>
Acked-by: Jon Hunter <jonathanh@nvidia.com>
It's not strictly necessary to initialize the fields in struct
tegra_pmc_soc if they are 0/false. However, we already initialize them
explicitly even if unnecessary, so keep doing that for consistency.
Signed-off-by: Thierry Reding <treding@nvidia.com>
Acked-by: Jon Hunter <jonathanh@nvidia.com>
Some recently added code used weird alignment and indentation. Fix these
occurrences to make them consistent with the rest of the code.
Signed-off-by: Thierry Reding <treding@nvidia.com>
Acked-by: Jon Hunter <jonathanh@nvidia.com>
Instead of using the global pmc variable, pass around a pointer where
possible. Also, replace most occurrences of pr_*() functions by their
equivalent dev_*() functions, reusing the pmc->dev pointer.
It's not possible to get completely rid of the global variable because
some of the public API that this driver exposes still relies on it.
Signed-off-by: Thierry Reding <treding@nvidia.com>
Acked-by: Jon Hunter <jonathanh@nvidia.com>
Now there are no more external users of tegra_powergate_is_powered(),
make this a local function.
Signed-off-by: Jon Hunter <jonathanh@nvidia.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>
Some of the fields in struct tegra_pmc had not been documented when they
were added. Add the missing kerneldoc.
Signed-off-by: Thierry Reding <treding@nvidia.com>
Acked-by: Jon Hunter <jonathanh@nvidia.com>
This will make it easier to insert new includes in the right place in
subsequent patches.
Signed-off-by: Thierry Reding <treding@nvidia.com>
Acked-by: Jon Hunter <jonathanh@nvidia.com>
The new prefix allows the GPIOs to be uniquely identified on a per-chip
basis, which makes it easier to distinguish Tegra186 specific GPIOs from
those of later chips such as Tegra194 which supports a very different
set of GPIOs.
Signed-off-by: Thierry Reding <treding@nvidia.com>
Misc driver updates for platforms, many of them power related.
- Rockchip adds power domain support for rk3066 and rk3188
- Amlogic adds a power measurement driver
- Allwinner adds SRAM support for three platforms (F1C100, H5, A64 C1)
- Wakeup and ti-sysc (platform bus) fixes for OMAP/DRA7
- Broadcom fixes suspend/resume with Thumb2 kernels, and improves
stability of a handful of firmware/platform interfaces
- PXA completes their conversion to dmaengine framework
- Renesas does a bunch of PM cleanups across many platforms
- Tegra adds support for suspend/resume on T186/T194, which includes
some driver cleanups and addition of wake events
- Tegra also adds a driver for memory controller (EMC) on Tegra2
- i.MX tweaks power domain bindings, and adds support for i.MX8MQ in GPC
- Atmel adds identifiers and LPDDR2 support for a new SoC, SAM9X60
+ misc cleanups across several platforms
-----BEGIN PGP SIGNATURE-----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=yEX2
-----END PGP SIGNATURE-----
Merge tag 'armsoc-drivers' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc
Pull ARM SoC driver updates from Olof Johansson:
"Misc driver updates for platforms, many of them power related.
- Rockchip adds power domain support for rk3066 and rk3188
- Amlogic adds a power measurement driver
- Allwinner adds SRAM support for three platforms (F1C100, H5, A64
C1)
- Wakeup and ti-sysc (platform bus) fixes for OMAP/DRA7
- Broadcom fixes suspend/resume with Thumb2 kernels, and improves
stability of a handful of firmware/platform interfaces
- PXA completes their conversion to dmaengine framework
- Renesas does a bunch of PM cleanups across many platforms
- Tegra adds support for suspend/resume on T186/T194, which includes
some driver cleanups and addition of wake events
- Tegra also adds a driver for memory controller (EMC) on Tegra2
- i.MX tweaks power domain bindings, and adds support for i.MX8MQ in
GPC
- Atmel adds identifiers and LPDDR2 support for a new SoC, SAM9X60
and misc cleanups across several platforms"
* tag 'armsoc-drivers' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (73 commits)
ARM: at91: add support in soc driver for new SAM9X60
ARM: at91: add support in soc driver for LPDDR2 SiP
memory: omap-gpmc: Use of_node_name_eq for node name comparisons
bus: ti-sysc: Check for no-reset and no-idle flags at the child level
ARM: OMAP2+: Check also the first dts child for hwmod flags
soc: amlogic: meson-clk-measure: Add missing REGMAP_MMIO dependency
soc: imx: gpc: Increase GPC_CLK_MAX to 7
soc: renesas: rcar-sysc: Fix power domain control after system resume
soc: renesas: rcar-sysc: Merge PM Domain registration and linking
soc: renesas: rcar-sysc: Remove rcar_sysc_power_{down,up}() helpers
soc: renesas: r8a77990-sysc: Fix initialization order of 3DG-{A,B}
dt-bindings: sram: sunxi: Add compatible for the A64 SRAM C1
dt-bindings: sram: sunxi: Add bindings for the H5 with SRAM C1
dt-bindings: sram: Add Allwinner suniv F1C100s
soc: sunxi: sram: Add support for the H5 SoC system control
soc: sunxi: sram: Enable EMAC clock access for H3 variant
soc: imx: gpcv2: add support for i.MX8MQ SoC
soc: imx: gpcv2: move register access table to domain data
soc: imx: gpcv2: prefix i.MX7 specific defines
dmaengine: pxa: make the filter function internal
...
When CONFIG_SMP is disabled, the tegra clk driver now fails to build:
drivers/clk/tegra/clk-tegra30.c: In function ‘tegra30_cpu_rail_off_ready’:
drivers/clk/tegra/clk-tegra30.c:1151:2: error: implicit declaration of function ‘tegra_pmc_cpu_is_powered’ [-Werror=implicit-function-declaration]
cpu_pwr_status = tegra_pmc_cpu_is_powered(1) ||
^
Fix the above error by removing the CONFIG_SMP ifdef around the
declaration around the PMC CPU APIs because although these are not
needed for non-SMP configurations, there is no harm in including these
for non-SMP builds either.
Fixes: 61866523ed6e ("clk: tegra30: Use Tegra CPU powergate helper function")
Reported-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Jon Hunter <jonathanh@nvidia.com>
Acked-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Stephen Boyd <sboyd@kernel.org>
Tegra194 supports 96 wake events in total. Many of them are never used,
so only the most common ones (RTC alarm and power key) are currently
defined.
Signed-off-by: Thierry Reding <treding@nvidia.com>
Tegra186 support 96 wake events in total. Many of them are never used,
so only the most common ones (RTC alarm and power key) are currently
defined.
Signed-off-by: Thierry Reding <treding@nvidia.com>
The power management controller has top-level controls that allow
certain interrupts (such as from the RTC or a subset of GPIOs) to
wake the system from sleep. Implement infrastructure to support
these wake events.
Signed-off-by: Thierry Reding <treding@nvidia.com>
Use DEFINE_SHOW_ATTRIBUTE macro to simplify the code.
Signed-off-by: Yangtao Li <tiny.windzz@gmail.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>
This fixes splats like the one below if CONFIG_DEBUG_ATOMIC_SLEEP=y
and machine (Tegra30) booted with SMP=n or all secondary CPU's are put
offline. Locking isn't needed because it protects atomic operation.
BUG: sleeping function called from invalid context at kernel/locking/mutex.c:254
in_atomic(): 1, irqs_disabled(): 128, pid: 0, name: swapper/0
CPU: 0 PID: 0 Comm: swapper/0 Tainted: G C 4.18.0-next-20180821-00180-gc3ebb6544e44-dirty #823
Hardware name: NVIDIA Tegra SoC (Flattened Device Tree)
[<c01134f4>] (unwind_backtrace) from [<c010db2c>] (show_stack+0x20/0x24)
[<c010db2c>] (show_stack) from [<c0bd0f3c>] (dump_stack+0x94/0xa8)
[<c0bd0f3c>] (dump_stack) from [<c0151df8>] (___might_sleep+0x13c/0x174)
[<c0151df8>] (___might_sleep) from [<c0151ea0>] (__might_sleep+0x70/0xa8)
[<c0151ea0>] (__might_sleep) from [<c0bec2b8>] (mutex_lock+0x2c/0x70)
[<c0bec2b8>] (mutex_lock) from [<c0589844>] (tegra_powergate_is_powered+0x44/0xa8)
[<c0589844>] (tegra_powergate_is_powered) from [<c0581a60>] (tegra30_cpu_rail_off_ready+0x30/0x74)
[<c0581a60>] (tegra30_cpu_rail_off_ready) from [<c0122244>] (tegra30_idle_lp2+0xa0/0x108)
[<c0122244>] (tegra30_idle_lp2) from [<c0853438>] (cpuidle_enter_state+0x140/0x540)
[<c0853438>] (cpuidle_enter_state) from [<c08538a4>] (cpuidle_enter+0x40/0x4c)
[<c08538a4>] (cpuidle_enter) from [<c01595e0>] (call_cpuidle+0x30/0x48)
[<c01595e0>] (call_cpuidle) from [<c01599f8>] (do_idle+0x238/0x28c)
[<c01599f8>] (do_idle) from [<c0159d28>] (cpu_startup_entry+0x28/0x2c)
[<c0159d28>] (cpu_startup_entry) from [<c0be76c8>] (rest_init+0xd8/0xdc)
[<c0be76c8>] (rest_init) from [<c1200f50>] (start_kernel+0x41c/0x430)
Signed-off-by: Dmitry Osipenko <digetx@gmail.com>
Acked-by: Jon Hunter <jonathanh@nvidia.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>
Implement read-only reset_reason and reset_level sysfs attributes that
can be used to query the reset reason and level at runtime.
Signed-off-by: Sandipan Patra <spatra@nvidia.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>
Now that the Tegra xHCI driver manages the XUSB power-domains itself,
remove the code to power-up the power-domains used by the xHCI device
from the PMC driver on boot.
Signed-off-by: Jon Hunter <jonathanh@nvidia.com>
Acked-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>
The most noteworthy SoC driver changes this time include:
- The TEE subsystem gains an in-kernel interface to access the TEE
from device drivers.
- The reset controller subsystem gains a driver for the Qualcomm
Snapdragon 845 Power Domain Controller.
- The Xilinx Zynq platform now has a firmware interface for its
platform management unit. This contains a firmware "ioctl" interface
that was a little controversial at first, but the version we merged
solved that by not exposing arbitrary firmware calls to user space.
- The Amlogic Meson platform gains a "canvas" driver that is used
for video processing and shared between different high-level drivers.
The rest is more of the usual, mostly related to SoC specific power
management support and core drivers in drivers/soc:
- Several Renesas SoCs (RZ/G1N, RZ/G2M, R-Car V3M, RZ/A2M) gain new
features related to power and reset control.
- The Mediatek mt8183 and mt6765 SoC platforms gain support for
their respective power management chips.
- A new driver for NXP i.MX8, which need a firmware interface for
power management.
- The SCPI firmware interface now contains support estimating power
usage of performance states
- The NVIDIA Tegra "pmc" driver gains a few new features, in particular
a pinctrl interface for configuring the pads.
- Lots of small changes for Qualcomm, in particular the "smem"
device driver.
- Some cleanups for the TI OMAP series related to their sysc
controller.
Additional cleanups and bugfixes in SoC specific drivers include the
Meson, Keystone, NXP, AT91, Sunxi, Actions, and Tegra platforms.
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1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=c/PQ
-----END PGP SIGNATURE-----
Merge tag 'armsoc-drivers' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc
Pull ARM SoC driver updates from Arnd Bergmann:
"The most noteworthy SoC driver changes this time include:
- The TEE subsystem gains an in-kernel interface to access the TEE
from device drivers.
- The reset controller subsystem gains a driver for the Qualcomm
Snapdragon 845 Power Domain Controller.
- The Xilinx Zynq platform now has a firmware interface for its
platform management unit. This contains a firmware "ioctl"
interface that was a little controversial at first, but the version
we merged solved that by not exposing arbitrary firmware calls to
user space.
- The Amlogic Meson platform gains a "canvas" driver that is used for
video processing and shared between different high-level drivers.
The rest is more of the usual, mostly related to SoC specific power
management support and core drivers in drivers/soc:
- Several Renesas SoCs (RZ/G1N, RZ/G2M, R-Car V3M, RZ/A2M) gain new
features related to power and reset control.
- The Mediatek mt8183 and mt6765 SoC platforms gain support for their
respective power management chips.
- A new driver for NXP i.MX8, which need a firmware interface for
power management.
- The SCPI firmware interface now contains support estimating power
usage of performance states
- The NVIDIA Tegra "pmc" driver gains a few new features, in
particular a pinctrl interface for configuring the pads.
- Lots of small changes for Qualcomm, in particular the "smem" device
driver.
- Some cleanups for the TI OMAP series related to their sysc
controller.
Additional cleanups and bugfixes in SoC specific drivers include the
Meson, Keystone, NXP, AT91, Sunxi, Actions, and Tegra platforms"
* tag 'armsoc-drivers' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (129 commits)
firmware: tegra: bpmp: Implement suspend/resume support
drivers: clk: Add ZynqMP clock driver
dt-bindings: clock: Add bindings for ZynqMP clock driver
firmware: xilinx: Add zynqmp IOCTL API for device control
Documentation: xilinx: Add documentation for eemi APIs
MAINTAINERS: imx: include drivers/firmware/imx path
firmware: imx: add misc svc support
firmware: imx: add SCU firmware driver support
reset: Fix potential use-after-free in __of_reset_control_get()
dt-bindings: arm: fsl: add scu binding doc
soc: fsl: qbman: add interrupt coalesce changing APIs
soc: fsl: bman_portals: defer probe after bman's probe
soc: fsl: qbman: Use last response to determine valid bit
soc: fsl: qbman: Add 64 bit DMA addressing requirement to QBMan
soc: fsl: qbman: replace CPU 0 with any online CPU in hotplug handlers
soc: fsl: qbman: Check if CPU is offline when initializing portals
reset: qcom: PDC Global (Power Domain Controller) reset controller
dt-bindings: reset: Add PDC Global binding for SDM845 SoCs
reset: Grammar s/more then once/more than once/
bus: ti-sysc: Just use SET_NOIRQ_SYSTEM_SLEEP_PM_OPS
...
In preparation to remove the node name pointer from struct device_node,
convert printf users to use the %pOFn format specifier.
Cc: Li Yang <leoyang.li@nxp.com>
Cc: David Brown <david.brown@linaro.org>
Cc: Jonathan Hunter <jonathanh@nvidia.com>
Cc: Santosh Shilimkar <ssantosh@kernel.org>
Cc: linuxppc-dev@lists.ozlabs.org
Cc: linux-arm-kernel@lists.infradead.org
Cc: linux-soc@vger.kernel.org
Acked-by: Thierry Reding <treding@nvidia.com>
Acked-by: Heiko Stuebner <heiko@sntech.de>
Acked-by: Qiang Zhao <qiang.zhao@nxp.com>
Acked-by: Andy Gross <andy.gross@linaro.org>
Signed-off-by: Rob Herring <robh@kernel.org>
Register a pinctrl device and implement get and set functions for
PIN_CONFIG_LOW_POWER_MODE and PIN_CONFIG_POWER_SOURCE parameters.
Signed-off-by: Aapo Vienamo <avienamo@nvidia.com>
Acked-by: Jon Hunter <jonathanh@nvidia.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>
Make tegra_io_pad_set_voltage() and tegra_io_pad_get_voltage() static
and remove the prototypes from pmc.h. Remove enum tegra_io_pad_voltage
and use the defines from <dt-bindings/pinctrl/pinctrl-tegra-io-pad.h>
instead.
These functions aren't used outside of the pmc driver and new use cases
should use the pinctrl interface instead.
Signed-off-by: Aapo Vienamo <avienamo@nvidia.com>
Acked-by: Jon Hunter <jonathanh@nvidia.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>
Refactor the IO pad tables into macro tables so that they can be reused
to generate pinctrl pin descriptors. Also add a name field which is
needed by pinctrl.
Signed-off-by: Aapo Vienamo <avienamo@nvidia.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>
Implement a function to query whether a pad is in deep power down mode.
This is needed by the pinctrl callbacks.
Signed-off-by: Aapo Vienamo <avienamo@nvidia.com>
Acked-by: Jon Hunter <jonathanh@nvidia.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>
Factor out the the code to calculate the correct DPD register and bit
number for a given pad. This logic will be needed to query the status
register.
Signed-off-by: Aapo Vienamo <avienamo@nvidia.com>
Acked-by: Jon Hunter <jonathanh@nvidia.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>
Implement support for the PMC_IMPL_E_33V_PWR register which replaces
PMC_PWR_DET register interface of the SoC generations preceding
Tegra186. Also add the voltage bit offsets to the tegra186_io_pads[]
table and the AO_HV pad.
Signed-off-by: Aapo Vienamo <avienamo@nvidia.com>
Acked-by: Jon Hunter <jonathanh@nvidia.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>
Fix child-node lookup during probe, which ended up searching the whole
device tree depth-first starting at the parent rather than just matching
on its children.
To make things worse, the parent pmc node could end up being prematurely
freed as of_find_node_by_name() drops a reference to its first argument.
Fixes: 3568df3d31 ("soc: tegra: Add thermal reset (thermtrip) support to PMC")
Cc: stable <stable@vger.kernel.org> # 4.0
Cc: Mikko Perttunen <mperttunen@nvidia.com>
Signed-off-by: Johan Hovold <johan@kernel.org>
Reviewed-by: Mikko Perttunen <mperttunen@nvidia.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>
general cleanups, but nothing too major. The majority of the diff goes to
two SoCs, Actions Semi and Qualcomm. A brand new driver is introduced for
Actions Semi so it takes up some lines to add all the different types, and
the Qualcomm diff is there because we add support for two SoCs and it's quite
a bit of data.
Otherwise the big driver updates are on TI Davinci and Amlogic platforms. And
then the long tail of driver updates for various fixes and stuff follows
after that.
Core:
- debugfs cleanups removing error checking and an unused provider API
- Removal of a clk init typedef that isn't used
- Usage of match_string() to simplify parent string name matching
- OF clk helpers moved to their own file (linux/of_clk.h)
- Make clk warnings more readable across kernel versions
New Drivers:
- Qualcomm SDM845 GCC and Video clk controllers
- Qualcomm MSM8998 GCC
- Actions Semi S900 SoC support
- Nuvoton npcm750 microcontroller clks
- Amlogic axg AO clock controller
Removed Drivers:
- Deprecated Rockchip clk-gate driver
Updates:
- debugfs functions stopped checking return values
- Support for the MSIOF module clocks on Rensas R-Car M3-N
- Support for the new Rensas RZ/G1C and R-Car E3 SoCs
- Qualcomm GDSC, RCG, and PLL updates for clk changes in new SoCs
- Berlin and Amlogic SPDX tagging
- Usage of of_clk_get_parent_count() in more places
- Proper implementation of the CDEV1/2 clocks on Tegra20
- Allwinner H6 PRCM clock support and R40 EMAC support
- Add critical flag to meson8b's fdiv2 as temporary fixup for ethernet
- Round closest support for meson's mpll driver
- Support for meson8b nand clocks and gxbb video decoder clocks
- Mediatek mali clks
- STM32MP1 fixes
- Uniphier LD11/LD20 stream demux system clock
-----BEGIN PGP SIGNATURE-----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=KK/v
-----END PGP SIGNATURE-----
Merge tag 'clk-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/clk/linux
Pull clk updates from Stephen Boyd:
"This time we have a good set of changes to the core framework that do
some general cleanups, but nothing too major. The majority of the diff
goes to two SoCs, Actions Semi and Qualcomm. A brand new driver is
introduced for Actions Semi so it takes up some lines to add all the
different types, and the Qualcomm diff is there because we add support
for two SoCs and it's quite a bit of data.
Otherwise the big driver updates are on TI Davinci and Amlogic
platforms. And then the long tail of driver updates for various fixes
and stuff follows after that.
Core:
- debugfs cleanups removing error checking and an unused provider API
- Removal of a clk init typedef that isn't used
- Usage of match_string() to simplify parent string name matching
- OF clk helpers moved to their own file (linux/of_clk.h)
- Make clk warnings more readable across kernel versions
New Drivers:
- Qualcomm SDM845 GCC and Video clk controllers
- Qualcomm MSM8998 GCC
- Actions Semi S900 SoC support
- Nuvoton npcm750 microcontroller clks
- Amlogic axg AO clock controller
Removed Drivers:
- Deprecated Rockchip clk-gate driver
Updates:
- debugfs functions stopped checking return values
- Support for the MSIOF module clocks on Rensas R-Car M3-N
- Support for the new Rensas RZ/G1C and R-Car E3 SoCs
- Qualcomm GDSC, RCG, and PLL updates for clk changes in new SoCs
- Berlin and Amlogic SPDX tagging
- Usage of of_clk_get_parent_count() in more places
- Proper implementation of the CDEV1/2 clocks on Tegra20
- Allwinner H6 PRCM clock support and R40 EMAC support
- Add critical flag to meson8b's fdiv2 as temporary fixup for ethernet
- Round closest support for meson's mpll driver
- Support for meson8b nand clocks and gxbb video decoder clocks
- Mediatek mali clks
- STM32MP1 fixes
- Uniphier LD11/LD20 stream demux system clock"
* tag 'clk-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/clk/linux: (134 commits)
clk: qcom: Export clk_fabia_pll_configure()
clk: bcm: Update and add Stingray clock entries
dt-bindings: clk: Update Stingray binding doc
clk-si544: Properly round requested frequency to nearest match
clk: ingenic: jz4770: Add 150us delay after enabling VPU clock
clk: ingenic: jz4770: Enable power of AHB1 bus after ungating VPU clock
clk: ingenic: jz4770: Modify C1CLK clock to disable CPU clock stop on idle
clk: ingenic: jz4770: Change OTG from custom to standard gated clock
clk: ingenic: Support specifying "wait for clock stable" delay
clk: ingenic: Add support for clocks whose gate bit is inverted
clk: use match_string() helper
clk: bcm2835: use match_string() helper
clk: Return void from debug_init op
clk: remove clk_debugfs_add_file()
clk: tegra: no need to check return value of debugfs_create functions
clk: davinci: no need to check return value of debugfs_create functions
clk: bcm2835: no need to check return value of debugfs_create functions
clk: no need to check return value of debugfs_create functions
clk: imx6: add EPIT clock support
clk: mvebu: use correct bit for 98DX3236 NAND
...
With a later commit an instance of the struct device will be added to
struct genpd and with that the size of the struct tegra_powergate will
be over 1024 bytes. That generates following warning:
drivers/soc/tegra/pmc.c:579:1: warning: the frame size of 1200 bytes is larger than 1024 bytes [-Wframe-larger-than=]
Avoid such warnings by allocating the structure dynamically.
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Acked-by: Thierry Reding <treding@nvidia.com>
As of_clk_get_parent_count() returns zero on failure, while
of_count_phandle_with_args() might return a negative error code, this
also fixes the issue of possibly using a very big number in the
allocation below.
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Acked-by: Jon Hunter <jonathanh@nvidia.com>
Reviewed-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Signed-off-by: Stephen Boyd <sboyd@kernel.org>
Make use of of_reset_control_array_get_exclusive() to manage
an array of reset controllers available with the device.
Cc: Jon Hunter <jonathanh@nvidia.com>
Cc: Thierry Reding <treding@nvidia.com>
Signed-off-by: Vivek Gautam <vivek.gautam@codeaurora.org>
[p.zabel@pengutronix.de: switch to hidden reset control array]
Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
Acked-by: Jon Hunter <jonathanh@nvidia.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>
tegra_powergate_sequence_power_up() makes up a struct tegra_powergate
from scratch in order to reuse the same code as used by the generic PM
domain implementation. However, subsequent patches will need to access
the struct tegra_pmc * embedded in the powergate structure, so we need
to make sure we always pass it in.
Tested-by: Hector Martin <marcan@marcan.st>
Tested-by: Andre Heider <a.heider@gmail.com>
Tested-by: Mikko Perttunen <mperttunen@nvidia.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>
Apply the memory built-in self test work around when ungating certain
Tegra210 power domains.
Signed-off-by: Peter De Schrijver <pdeschrijver@nvidia.com>
Reviewed-by: Jon Hunter <jonathanh@nvidia.com>
Tested-by: Jon Hunter <jonathanh@nvidia.com>
Tested-by: Hector Martin <marcan@marcan.st>
Tested-by: Andre Heider <a.heider@gmail.com>
Tested-by: Mikko Perttunen <mperttunen@nvidia.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>
The Tegra194 PMC is mostly compatible with Tegra186, including in all
currently supported features. As such, add a new compatibility string
but point to the existing Tegra186 SoC data for now.
Signed-off-by: Mikko Perttunen <mperttunen@nvidia.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>
Move Tegra186 support to the consolidated PMC driver to reduce some of
the duplication and also gain I/O pad functionality on the new SoC as a
side-effect.
Signed-off-by: Thierry Reding <treding@nvidia.com>
Parameterize some aspects of the driver in preparation for Tegra186 PMC
support. Initially the Tegra186 driver had been split off into an extra
driver, but it turns out the backwards-compatibility break isn't as bad
as originally assumed, so with a little parameterization the same code
can be used to keep supporting all SoC generations.
Signed-off-by: Thierry Reding <treding@nvidia.com>
The for_each_child_of_node macro itself maintains the correct reference
count of the nodes so the explicit of_node_put() call causes a warning:
[ 0.098960] OF: ERROR: Bad of_node_put() on /pmc@7000e400/powergates/xusba
[ 0.098981] CPU: 0 PID: 1 Comm: swapper/0 Not tainted 4.11.3 #1-NixOS
[ 0.098996] Hardware name: NVIDIA Jetson TX1 Developer Kit (DT)
[ 0.099011] Call trace:
[ 0.099034] [<ffff00000808a048>] dump_backtrace+0x0/0x2a0
[ 0.099051] [<ffff00000808a30c>] show_stack+0x24/0x30
[ 0.099069] [<ffff0000084a6494>] dump_stack+0x9c/0xc0
[ 0.099090] [<ffff000008992214>] of_node_release+0xa4/0xa8
[ 0.099107] [<ffff0000084a9270>] kobject_put+0x90/0x1f8
[ 0.099124] [<ffff0000089914ac>] of_node_put+0x24/0x30
[ 0.099140] [<ffff00000898cec4>] __of_get_next_child+0x4c/0x70
[ 0.099155] [<ffff00000898cf28>] of_get_next_child+0x40/0x68
[ 0.099173] [<ffff0000090a099c>] tegra_pmc_early_init+0x4e8/0x5ac
[ 0.099189] [<ffff00000808399c>] do_one_initcall+0x5c/0x168
[ 0.099206] [<ffff000009050c98>] kernel_init_freeable+0xd4/0x240
[ 0.099224] [<ffff000008b2d658>] kernel_init+0x18/0x108
[ 0.099238] [<ffff0000080836c0>] ret_from_fork+0x10/0x50
(It's not very apparent from the OF documentation that of_node_put() is
not needed; the macro itself has no docstring and of_get_next_child()
used in the implementation begins with "Returns a node pointer with
refcount incremented" but then only at the very end of the docstring
the crucial part "Decrements the refcount of prev" is mentioned.)
Fixes: a38045121b ("soc/tegra: pmc: Add generic PM domain support")
Signed-off-by: Tuomas Tynkkynen <tuomas.tynkkynen@iki.fi>
Signed-off-by: Thierry Reding <treding@nvidia.com>
The various error messages refer to the PM domains as "power domain",
"genpd" and "PM domain". That's confusing, so convert all error messages
to use the most prominent: "PM domain".
Acked-by: Jon Hunter <jonathanh@nvidia.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>
Commit 3fe577107c ("PM / Domains: Add support for removing PM
domains") add support for removing PM domains. Update the Tegra PMC
driver to remove PM domains if we fail to add a provider for the PM
domain.
Please note that the code under 'power_on_cleanup' label does not
really belong in the clean-up error path for tegra_powergate_add().
To keep the error path simple, remove this label and move the
associated code to where it needs to be invoked.
Signed-off-by: Jon Hunter <jonathanh@nvidia.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>
Commit 7eb231c337 ("PM / Domains: Convert pm_genpd_init() to return
an error code") updated pm_genpd_init() to return an error code. Update
the Tegra PMC driver to check the return value from pm_genpd_init() and
handle any errors returned.
Signed-off-by: Jon Hunter <jonathanh@nvidia.com>
[treding@nvidia.com: use pr_err() instead of dev_err()]
Signed-off-by: Thierry Reding <treding@nvidia.com>
Use pr_err() instead of dev_err() when the pmc->dev field has not been
initialized yet and add a few missing error messages as well as remove
duplicate ones.
Based on work by Jon Hunter <jonathanh@nvidia.com>.
Signed-off-by: Thierry Reding <treding@nvidia.com>
The function tegra_io_rail_prepare() converts the IO rail ID into a
bit position that is used to check the status and control the IO rail
in the PMC registers. However, rather than converting to a bit position
it is more useful to convert to a bit-mask because this is what is
actually used. By doing so the BIT() marco only needs to be used once
and we can use the IO_DPD_REQ_CODE_MASK when checking for erroneous rail
IDs.
Signed-off-by: Jon Hunter <jonathanh@nvidia.com>
[treding@nvidia.com: rebase and rename bit -> mask]
Signed-off-by: Thierry Reding <treding@nvidia.com>
It is possible for the public functions, tegra_io_rail_power_on/off()
to be called before the PMC device has been probed. If this happens
then the pmc->clk member will not be initialised and the call to
clk_get_rate() in tegra_io_rail_prepare() will return zero and lead
to a divide-by-zero exception. The function clk_get_rate() will return
zero if a NULl clk pointer is passed. Therefore, rather that checking
if pmc->clk is initialised, fix this by checking the return value for
clk_get_rate() to make sure it is not zero.
Signed-off-by: Jon Hunter <jonathanh@nvidia.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>
I/O pins on Tegra SoCs are grouped into so-called I/O pads. Each such
pad can be used to control the common voltage signal level and power
state of the pins in the given pad.
I/O pads can be powered down even if the system is active, which can
save power from that I/O interface. For SoC generations prior to
Tegra124 the I/O pad voltage is automatically detected and hence the
system software doesn't need to configure it. However, starting with
Tegra210 the detection logic has been removed, so explicit control of
the I/O pad voltage by system software is required.
Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>
Bit definitions are sorted in decreasing order by offset. Apply the same
ordering to all definitions.
Signed-off-by: Thierry Reding <treding@nvidia.com>
The function tegra_pmc_readl() returns the u32 type data and hence
change the data type of variable where this data is stored to u32
type.
Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com>
Reviewed-by: Jon Hunter <jonathanh@nvidia.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>
Jon Hunter