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linux/drivers/clk/samsung
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Marek Szyprowski f3bb0f796f clk: samsung: exynos4: mark 'chipid' clock as CLK_IGNORE_UNUSED 
The ChipID IO region has it's own clock, which is being disabled while
scanning for unused clocks. It turned out that some CPU hotplug, CPU idle
or even SOC firmware code depends on the reads from that area. Fix the
mysterious hang caused by entering deep CPU idle state by ignoring the
'chipid' clock during unused clocks scan, as there are no direct clients
for it which will keep it enabled.

Fixes: e062b57177 ("clk: exynos4: register clocks using common clock framework")
Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
Link: https://lore.kernel.org/r/20200922124046.10496-1-m.szyprowski@samsung.com
Reviewed-by: Krzysztof Kozlowski <krzk@kernel.org>
Acked-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
Signed-off-by: Stephen Boyd <sboyd@kernel.org>
2020-09-22 12:26:59 -07:00
..
clk-cpu.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
clk-cpu.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
clk-exynos4.c clk: samsung: exynos4: mark 'chipid' clock as CLK_IGNORE_UNUSED 2020-09-22 12:26:59 -07:00
clk-exynos5-subcmu.c clk: samsung: Change signature of exynos5_subcmus_init() function 2019-08-08 13:53:42 -07:00
clk-exynos5-subcmu.h clk: samsung: Change signature of exynos5_subcmus_init() function 2019-08-08 13:53:42 -07:00
clk-exynos7.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
clk-exynos3250.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
clk-exynos4412-isp.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
clk-exynos5250.c clk: samsung: Change signature of exynos5_subcmus_init() function 2019-08-08 13:53:42 -07:00
clk-exynos5260.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
clk-exynos5260.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
clk-exynos5410.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
clk-exynos5420.c clk: samsung: Keep top BPLL mux on Exynos542x enabled 2020-09-15 13:56:51 +02:00
clk-exynos5433.c clk: samsung: exynos5433: Add IGNORE_UNUSED flag to sclk_i2s1 2020-05-19 16:58:42 +02:00
clk-exynos-audss.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
clk-exynos-clkout.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
clk-pll.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
clk-pll.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
clk-s3c64xx.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
clk-s3c2410-dclk.c clk: s3c2410: use devm_platform_ioremap_resource() to simplify code 2019-10-16 16:17:52 -07:00
clk-s3c2410.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
clk-s3c2412.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
clk-s3c2443.c ARM/SAMSUNG EXYNOS ARM ARCHITECTURES: Use fallthrough; 2020-05-19 16:58:42 +02:00
clk-s5pv210-audss.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
clk-s5pv210.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
clk.c clk: samsung: Remove redundant check in samsung_cmu_register_one 2020-02-12 15:38:44 -08:00
clk.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
Kconfig treewide: Add SPDX license identifier - Makefile/Kconfig 2019-05-21 10:50:46 +02:00
Makefile clk: samsung: Remove support for Exynos5440 2018-07-24 18:43:52 +02:00