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Claudiu Beznea c4ea7b0c61 clk: at91: sama7g5: remove prescaler part of master clock 
[ Upstream commit facb87ad75 ]

On SAMA7G5 the prescaler part of master clock has been implemented as a
changeable one. Everytime the prescaler is changed the PMC_SR.MCKRDY bit
must be polled. Value 1 for PMC_SR.MCKRDY means the prescaler update is
done. Driver polls for this bit until it becomes 1. On SAMA7G5 it has
been discovered that in some conditions the PMC_SR.MCKRDY is not rising
but the rate it provides it's stable. The workaround is to add a timeout
when polling for PMC_SR.MCKRDY. At the moment, for SAMA7G5, the prescaler
will be removed from Linux clock tree as all the frequencies for CPU could
be obtained from PLL and also there will be less overhead when changing
frequency via DVFS.

Signed-off-by: Claudiu Beznea <claudiu.beznea@microchip.com>
Link: https://lore.kernel.org/r/20211011112719.3951784-14-claudiu.beznea@microchip.com
Acked-by: Nicolas Ferre <nicolas.ferre@microchip.com>
Signed-off-by: Stephen Boyd <sboyd@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
 		2021-11-25 09:48:30 +01:00
..
actions clk: actions: Add NIC and ETHERNET clock support for Actions S500 SoC 2021-06-27 18:45:17 -07:00
analogbits Merge branch 'akpm' (patches from Andrew) 2021-07-02 12:08:10 -07:00
at91 clk: at91: sama7g5: remove prescaler part of master clock 2021-11-25 09:48:30 +01:00
axis
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axs10x
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baikal-t1 clk: baikal-t1: Mark Ethernet PLL as critical 2020-10-13 19:48:34 -07:00
bcm clk: bcm2835: Switch to clk_divider.determine_rate 2021-08-05 17:36:10 -07:00
berlin
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davinci This pull request contains zero diff to the core framework. It is a collection 2020-10-22 12:53:28 -07:00
h8300
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hisilicon clk: hisilicon: hi3559a: select RESET_HISI 2021-07-26 17:23:40 -07:00
imgtec treewide: replace '---help---' in Kconfig files with 'help' 2020-06-14 01:57:21 +09:00
imx clk: imx: imx6ul: Move csi_sel mux to correct base register 2021-11-25 09:48:26 +01:00
ingenic clk: ingenic: Add support for the JZ4760 2021-06-27 19:49:18 -07:00
keystone clk: keystone: syscon-clk: Add support for AM64 specific epwm-tbclk 2021-06-22 14:18:26 -07:00
loongson1
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mediatek clk: mediatek: make COMMON_CLK_MT8167* depend on COMMON_CLK_MT8167 2021-07-27 11:46:27 -07:00
meson clk: meson: regmap: switch to determine_rate for the dividers 2021-06-30 11:37:02 -07:00
microchip clk: let init callback return an error code 2019-12-23 18:53:13 -08:00
mmp clk: mmp2: fix build without CONFIG_PM 2021-01-12 12:10:55 -08:00
mstar clk: mstar: msc313-mpll: Fix format specifier 2021-02-16 12:52:28 -08:00
mvebu clk: mvebu: ap-cpu-clk: Fix a memory leak in error handling paths 2021-11-18 19:16:46 +01:00
mxs
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nxp
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pistachio clk: pistachio: Make it selectable for generic MIPS kernel 2021-08-12 16:01:49 +02:00
pxa clk: pxa: Constify static struct clk_ops 2020-10-13 19:49:11 -07:00
qcom clk: qcom: add select QCOM_GDSC for SM6350 2021-10-13 11:44:42 -07:00
ralink clk: ralink: avoid to set 'CLK_IS_CRITICAL' flag for gates 2021-08-28 22:24:06 -07:00
renesas clk: renesas: rzg2l: Fix clk status function 2021-09-24 15:11:05 +02:00
rockchip Merge branches 'clk-nvidia', 'clk-rockchip', 'clk-at91' and 'clk-vc5' into clk-next 2021-09-01 15:26:58 -07:00
samsung clk: samsung: Remove redundant dev_err calls 2021-04-08 19:35:26 +02:00
sifive clk: sifive: Fix kernel-doc 2021-06-01 23:39:15 -07:00
socfpga clk: socfpga: agilex: fix duplicate s2f_user0_clk 2021-09-24 16:03:08 -07:00
spear clk: spear: Move prototype to accessible header 2021-02-11 11:56:06 -08:00
sprd This time around we have 4 lines of diff in the core framework, removing a 2020-06-10 11:42:19 -07:00
st clk: st: clkgen-fsyn: embed soc clock outputs within compatible data 2021-06-27 19:53:40 -07:00
sunxi clk: sunxi: Demote non-conformant kernel-doc headers 2021-03-08 16:47:55 +01:00
sunxi-ng clk: sunxi-ng: Unregister clocks/resets when unbinding 2021-11-25 09:48:23 +01:00
tegra Nothing changed in the clk framework core this time around. We did get 2021-09-02 14:17:24 -07:00
ti drivers: ti: remove redundant error message in adpll.c 2021-06-27 19:56:45 -07:00
uniphier clk: uniphier: Fix potential infinite loop 2021-04-12 19:09:59 -07:00
ux500 mfd: db8500-prcmu: Handle missing FW variant 2021-08-09 09:33:29 +01:00
versatile clk: versatile: Depend on HAS_IOMEM 2021-06-04 12:23:28 -07:00
x86 clk: x86: Rename clk-lpt to more specific clk-lpss-atom 2021-07-27 14:03:47 -07:00
xilinx clk: xilinx: move xlnx_vcu clock driver from soc 2021-02-08 18:31:25 -08:00
zynq clk: zynq: clkc: Remove various instances of an unused variable 'clk' 2021-02-11 11:56:07 -08:00
zynqmp Merge branches 'clk-kirkwood', 'clk-imx', 'clk-doc', 'clk-zynq' and 'clk-ralink' into clk-next 2021-09-01 15:27:07 -07:00
Kconfig clk: pistachio: Make it selectable for generic MIPS kernel 2021-08-12 16:01:49 +02:00
Makefile clk: pistachio: Make it selectable for generic MIPS kernel 2021-08-12 16:01:49 +02:00
clk-asm9260.c clk: asm9260: fix __clk_hw_register_fixed_rate_with_accuracy typo 2020-04-13 12:20:06 -07:00
clk-aspeed.c clk: aspeed: Add RMII RCLK gates for both AST2500 MACs 2019-11-26 10:02:48 -08:00
clk-aspeed.h
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clk-ast2600.c media: aspeed: fix clock handling logic 2021-03-11 11:59:45 +01:00
clk-axi-clkgen.c clk: axi-clkgen: use devm_platform_ioremap_resource() short-hand 2021-02-08 18:13:13 -08:00
clk-axm5516.c
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clk-bd718x7.c clk: bd718xx: Drop BD70528 support 2021-06-27 18:42:45 -07:00
clk-bm1880.c clk: bm1800: Remove set but not used variable 'fref' 2019-12-24 00:10:33 -08:00
clk-bulk.c
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clk-cdce706.c Replace HTTP links with HTTPS ones: Common CLK framework 2020-07-10 17:15:34 -07:00
clk-cdce925.c
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clk-clps711x.c
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clk-composite.c clk: composite: Also consider .determine_rate for rate + mux composites 2021-10-18 12:59:42 -07:00
clk-conf.c
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clk-cs2000-cp.c
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clk-devres.c clk: fix leak on devm_clk_bulk_get_all() unwind 2021-07-31 00:53:38 -07:00
clk-divider.c clk: divider: Implement and wire up .determine_rate by default 2021-08-05 17:35:58 -07:00
clk-fixed-factor.c clk: fixed: fix double free in resource managed fixed-factor clock 2021-04-07 16:01:25 -07:00
clk-fixed-mmio.c clk: clk-fixed-mmio: Demote obvious kernel-doc abuse 2021-02-11 11:56:05 -08:00
clk-fixed-rate.c clk: fixed: add missing kerneldoc 2020-09-22 12:44:14 -07:00
clk-fractional-divider.c clk: fractional-divider: Document the arithmetics used behind the code 2021-08-12 12:42:00 -07:00
clk-fractional-divider.h clk: fractional-divider: Hide clk_fractional_divider_ops from wide audience 2021-08-12 12:42:00 -07:00
clk-fsl-flexspi.c clk: fsl-flexspi: new driver 2020-12-07 16:56:41 -08:00
clk-fsl-sai.c clk: fsl-sai: use devm_clk_hw_register_composite_pdata() 2020-12-07 14:06:16 -08:00
clk-gate.c treewide: Remove uninitialized_var() usage 2020-07-16 12:35:15 -07:00
clk-gemini.c
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clk-gpio.c Replace HTTP links with HTTPS ones: Common CLK framework 2020-07-10 17:15:34 -07:00
clk-hi655x.c
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clk-highbank.c
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clk-hsdk-pll.c CLK: HSDK: CGU: add support for 148.5MHz clock 2020-05-28 21:06:39 -07:00
clk-k210.c clk: k210: Fix k210_clk_set_parent() 2021-06-30 11:34:36 -07:00
clk-lmk04832.c clk: lmk04832: drop redundant fallthrough statements 2021-07-27 11:52:30 -07:00
clk-lochnagar.c
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clk-max9485.c
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clk-max77686.c
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clk-milbeaut.c
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clk-moxart.c
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clk-multiplier.c
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clk-mux.c clk: mux: provide devm_clk_hw_register_mux() 2021-04-07 11:05:44 -07:00
clk-nomadik.c
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clk-npcm7xx.c clk: clk-npcm7xx: Remove unused static const tables 'npcm7xx_gates' and 'npcm7xx_divs_fx' 2021-02-11 11:56:05 -08:00
clk-nspire.c
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clk-oxnas.c
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clk-palmas.c clk: palmas: Add a missing SPDX license header 2021-08-05 17:34:30 -07:00
clk-plldig.c clk: ls1028a: fix a dereference of pointer 'parent' before a null check 2020-02-03 23:03:49 -08:00
clk-pwm.c clk: pwm: drop of_match_ptr from of_device_id table 2020-12-10 12:24:18 -08:00
clk-qoriq.c clk: qoriq: use macros to generate pll_mask 2021-02-14 13:02:01 -08:00
clk-rk808.c
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clk-s2mps11.c clk: s2mps11: Fix a resource leak in error handling paths in the probe function 2020-12-19 15:53:31 -08:00
clk-scmi.c clk: scmi: Port driver to the new scmi_clk_proto_ops interface 2021-03-30 16:34:37 +01:00
clk-scpi.c clk: scpi: mark scpi_clk_match as maybe unused 2020-12-10 12:24:40 -08:00
clk-si514.c
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clk-si544.c
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clk-si570.c clk: si570: Skip NVM to RAM recall operation if an optional property is set 2021-02-11 12:13:50 -08:00
clk-si5341.c clk: si5341: Add sysfs properties to allow checking/resetting device faults 2021-06-27 19:58:15 -07:00
clk-si5351.c clk: si5351: Wait for bit clear after PLL reset 2020-12-19 15:49:54 -08:00
clk-si5351.h
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clk-sparx5.c clk: sparx5: Add Sparx5 SoC DPLL clock driver 2020-07-28 18:17:56 -07:00
clk-stm32f4.c Nothing changed in the clk framework core this time around. We did get 2021-09-02 14:17:24 -07:00
clk-stm32h7.c clk: stm32h7: Switch to clk_divider.determine_rate 2021-08-05 17:36:10 -07:00
clk-stm32mp1.c clk: stm32mp1: Switch to clk_divider.determine_rate 2021-08-05 17:36:10 -07:00
clk-twl6040.c
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clk-versaclock5.c clk: vc5: Add properties for configuring SD/OE behavior 2021-08-28 23:46:21 -07:00
clk-vt8500.c
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clk-wm831x.c
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clk-xgene.c clk: clk-xgene: Add description for 'mask' and fix formatting for 'flags' 2021-02-11 11:56:06 -08:00
clk.c clk: Skip clk provider registration when np is NULL 2021-05-11 08:47:25 +02:00
clk.h
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clkdev.c clkdev: remove unused clkdev_alloc() interfaces 2021-06-08 17:00:09 +02:00