From: Srinivas Kandagatla srinivas.kandagatla@linaro.org
[ Upstream commit ea157c2ba821dab789a544cd9fbe44dc07036ff8 ]
Interrupt Clear registers WCD938X_INTR_CLEAR_0 - WCD938X_INTR_CLEAR_2 are not marked as volatile. This has resulted in a missing interrupt bug while performing runtime pm. regcache_sync() during runtime pm resume path will write to Interrupt clear registers with previous values which basically clears the pending interrupt and actual interrupt handler never sees this interrupt.
This issue is more visible with headset plug-in plug-out case compared to headset button.
Fix this by adding the Interrupt clear registers to volatile range
Fixes: 8d78602aa87a ("ASoC: codecs: wcd938x: add basic driver") Signed-off-by: Srinivas Kandagatla srinivas.kandagatla@linaro.org Link: https://lore.kernel.org/r/20211116114623.11891-2-srinivas.kandagatla@linaro.... Signed-off-by: Mark Brown broonie@kernel.org Signed-off-by: Sasha Levin sashal@kernel.org --- sound/soc/codecs/wcd938x.c | 3 +++ 1 file changed, 3 insertions(+)
diff --git a/sound/soc/codecs/wcd938x.c b/sound/soc/codecs/wcd938x.c index 52de7d14b1398..67151c7770c65 100644 --- a/sound/soc/codecs/wcd938x.c +++ b/sound/soc/codecs/wcd938x.c @@ -1174,6 +1174,9 @@ static bool wcd938x_readonly_register(struct device *dev, unsigned int reg) case WCD938X_DIGITAL_INTR_STATUS_0: case WCD938X_DIGITAL_INTR_STATUS_1: case WCD938X_DIGITAL_INTR_STATUS_2: + case WCD938X_DIGITAL_INTR_CLEAR_0: + case WCD938X_DIGITAL_INTR_CLEAR_1: + case WCD938X_DIGITAL_INTR_CLEAR_2: case WCD938X_DIGITAL_SWR_HM_TEST_0: case WCD938X_DIGITAL_SWR_HM_TEST_1: case WCD938X_DIGITAL_EFUSE_T_DATA_0: