ASoC: Wait for WM8993 FLL to stabilise

Ensure the FLL is locked before we return from set_fll().

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

1 files changed, 6 insertions, 0 deletions

diff --git a/sound/soc/codecs/wm8993.c b/sound/soc/codecs/wm8993.c
index 2b40c93601ed..7c7fd925db8d 100644
--- a/sound/soc/codecs/wm8993.c
+++ b/sound/soc/codecs/wm8993.c
@@ -444,6 +444,12 @@ static int _wm8993_set_fll(struct snd_soc_codec *codec, int fll_id, int source,
         /* Enable the FLL */
         snd_soc_write(codec, WM8993_FLL_CONTROL_1, reg1 | WM8993_FLL_ENA);
 
+        /* Both overestimates */
+        if (Fref < 1000000)
+                msleep(3);
+        else
+                msleep(1);
+
         dev_dbg(codec->dev, "FLL enabled at %dHz->%dHz\n", Fref, Fout);
 
         wm8993->fll_fref = Fref;