ASoC: Enable WM8990 ADC clocking workaround

Enable a hardware workaround which avoids problems with the clocking of
the ADCs in certain configurations.

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

1 files changed, 4 insertions, 2 deletions

diff --git a/sound/soc/codecs/wm8990.c b/sound/soc/codecs/wm8990.c
index 5c84f02c4579..938e15429207 100644
--- a/sound/soc/codecs/wm8990.c
+++ b/sound/soc/codecs/wm8990.c
@@ -1272,9 +1272,11 @@ static int wm8990_set_bias_level(struct snd_soc_codec *codec,
 
                         /* disable POBCTRL, SOFT_ST and BUFDCOPEN */
                         wm8990_write(codec, WM8990_ANTIPOP2, WM8990_BUFIOEN);
-                } else {
-                        /* ON -> standby */
 
+                        /* Enable workaround for ADC clocking issue. */
+                        wm8990_write(codec, WM8990_EXT_ACCESS_ENA, 0x2);
+                        wm8990_write(codec, WM8990_EXT_CTL1, 0xa003);
+                        wm8990_write(codec, WM8990_EXT_ACCESS_ENA, 0);
                 }
                 break;