Only some bits of that register are actually volatile, so to prevent issues
with caching let's simply bypass the cache explicitly when we access these
particular bits.

This fixes mic-cfg value not being reapplied after runtime resume.

Signed-off-by: Sebastian Krzyszkowiak <sebastian.krzyszkowiak@puri.sm>
---
 sound/soc/codecs/wm8962.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/sound/soc/codecs/wm8962.c b/sound/soc/codecs/wm8962.c
index dd73b4dc1b97..22101284c095 100644
--- a/sound/soc/codecs/wm8962.c
+++ b/sound/soc/codecs/wm8962.c
@@ -793,7 +793,6 @@ static bool wm8962_volatile_register(struct device *dev, unsigned int reg)
 	case WM8962_CLOCKING1:
 	case WM8962_SOFTWARE_RESET:
 	case WM8962_THERMAL_SHUTDOWN_STATUS:
-	case WM8962_ADDITIONAL_CONTROL_4:
 	case WM8962_DC_SERVO_6:
 	case WM8962_INTERRUPT_STATUS_1:
 	case WM8962_INTERRUPT_STATUS_2:
@@ -3074,7 +3073,9 @@ static void wm8962_mic_work(struct work_struct *work)
 	int irq_pol = 0;
 	int reg;
 
+	regcache_cache_bypass(wm8962->regmap, true);
 	reg = snd_soc_component_read(component, WM8962_ADDITIONAL_CONTROL_4);
+	regcache_cache_bypass(wm8962->regmap, false);
 
 	if (reg & WM8962_MICDET_STS) {
 		status |= SND_JACK_MICROPHONE;

-- 
2.52.0