ASoC: codecs: wcd938x: fix volatile register range

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: 701901f5cff2 ("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.org
Signed-off-by: Mark Brown <broonie@kernel.org>

diff --git a/sound/soc/codecs/wcd938x.c b/sound/soc/codecs/wcd938x.c
index 52de7d14b13985970d44bb3f36203bfc9545d600..67151c7770c65064f55ad7378a6ba794f93bf7b7 100644 (file)
--- 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: