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clk: samsung: gs101: fix synchronous external abort in samsung_clk_save()

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EARLY_WAKEUP_SW_TRIG_*_SET and EARLY_WAKEUP_SW_TRIG_*_CLEAR
registers are only writeable. Attempting to read these registers
during samsung_clk_save() causes a synchronous external abort.

Remove these 8 registers from cmu_top_clk_regs[] array so that
system suspend gets further.

Note: the code path can be exercised using the following command:
echo mem > /sys/power/state

Fixes: 2c597bb7d6 ("clk: samsung: clk-gs101: Add cmu_top, cmu_misc and cmu_apm support")
Signed-off-by: Peter Griffin <peter.griffin@linaro.org>
Cc: stable@vger.kernel.org
Link: https://lore.kernel.org/r/20250303-clk-suspend-fix-v1-1-c2edaf66260f@linaro.org
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
This commit is contained in:
Peter Griffin 2025-03-03 13:11:21 +00:00 committed by Krzysztof Kozlowski
parent 2014c95afe
commit f2052a4a62
1 changed files with 0 additions and 8 deletions
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8
drivers/clk/samsung/clk-gs101.c
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@ -382,17 +382,9 @@ static const unsigned long cmu_top_clk_regs[] __initconst = {
EARLY_WAKEUP_DPU_DEST,
EARLY_WAKEUP_CSIS_DEST,
EARLY_WAKEUP_SW_TRIG_APM,
EARLY_WAKEUP_SW_TRIG_APM_SET,
EARLY_WAKEUP_SW_TRIG_APM_CLEAR,
EARLY_WAKEUP_SW_TRIG_CLUSTER0,
EARLY_WAKEUP_SW_TRIG_CLUSTER0_SET,
EARLY_WAKEUP_SW_TRIG_CLUSTER0_CLEAR,
EARLY_WAKEUP_SW_TRIG_DPU,
EARLY_WAKEUP_SW_TRIG_DPU_SET,
EARLY_WAKEUP_SW_TRIG_DPU_CLEAR,
EARLY_WAKEUP_SW_TRIG_CSIS,
EARLY_WAKEUP_SW_TRIG_CSIS_SET,
EARLY_WAKEUP_SW_TRIG_CSIS_CLEAR,
CLK_CON_MUX_MUX_CLKCMU_BO_BUS,
CLK_CON_MUX_MUX_CLKCMU_BUS0_BUS,
CLK_CON_MUX_MUX_CLKCMU_BUS1_BUS,