| Message ID | 20250303-clk-suspend-fix-v1-1-c2edaf66260f@linaro.org (mailing list archive) |
|---|---|
| State | Accepted |
| Headers | show |
| Series | clk: samsung: gs101: fix synchronous external abort in samsung_clk_save() | expand |
On Mon, 03 Mar 2025 13:11:21 +0000, Peter Griffin wrote: > 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. > > [...] Applied, thanks! [1/1] clk: samsung: gs101: fix synchronous external abort in samsung_clk_save() https://git.kernel.org/krzk/linux/c/f2052a4a62465c0037aef7ea7426bffdb3531e41 Best regards,
diff --git a/drivers/clk/samsung/clk-gs101.c b/drivers/clk/samsung/clk-gs101.c index 86b39edba122..08b867ae3ed9 100644 --- a/drivers/clk/samsung/clk-gs101.c +++ b/drivers/clk/samsung/clk-gs101.c @@ -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,
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: 2c597bb7d66a ("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 --- Note: to hit this clock driver issue you also need the CPU hotplug series otherwise system fails earlier offlining CPUs Link: https://lore.kernel.org/linux-arm-kernel/20241213-contrib-pg-cpu-hotplug-suspend2ram-fixes-v1-v1-0-c72978f63713@linaro.org/T/ --- drivers/clk/samsung/clk-gs101.c | 8 -------- 1 file changed, 8 deletions(-) --- base-commit: 480112512bd6e770fa1902d01173731d02377705 change-id: 20250303-clk-suspend-fix-81c5d63827e3 Best regards,