diff --git a/sound/soc/codecs/rt5645.c b/sound/soc/codecs/rt5645.c
index d9f34421414e..0a4cb6bc3433 100644
--- a/sound/soc/codecs/rt5645.c
+++ b/sound/soc/codecs/rt5645.c
@@ -394,6 +394,7 @@ static bool rt5645_readable_register(struct device *dev, unsigned int reg)
 	case RT5645_DEPOP_M1:
 	case RT5645_DEPOP_M2:
 	case RT5645_DEPOP_M3:
+	case RT5645_CHARGE_PUMP:
 	case RT5645_MICBIAS:
 	case RT5645_A_JD_CTRL1:
 	case RT5645_VAD_CTRL4: