ASoC: Warn on low WM8994 AIFCLK

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Acked-by: Liam Girdwood <lrg@slimlogic.co.uk>

1 files changed, 5 insertions, 0 deletions

diff --git a/sound/soc/codecs/wm8994.c b/sound/soc/codecs/wm8994.c
index cdfbfb633f30..f04a116e678b 100644
--- a/sound/soc/codecs/wm8994.c
+++ b/sound/soc/codecs/wm8994.c
@@ -1769,6 +1769,11 @@ static int configure_aif_clock(struct snd_soc_codec *codec, int aif)
                 dev_dbg(codec->dev, "Dividing AIF%d clock to %dHz\n",
                         aif + 1, rate);
         }
+
+        if (rate && rate < 3000000)
+                dev_warn(codec->dev, "AIF%dCLK is %dHz, should be >=3MHz for optimal performance\n",
+                         aif + 1, rate);
+
         wm8994->aifclk[aif] = rate;
 
         snd_soc_update_bits(codec, WM8994_AIF1_CLOCKING_1 + offset,