ASoC: WM8804: Retrieve the device revision and print it

Be verbose and print out the device revision.

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

1 files changed, 8 insertions, 0 deletions

diff --git a/sound/soc/codecs/wm8804.c b/sound/soc/codecs/wm8804.c
index 2657f5c7ff08..642b07ceddfa 100644
--- a/sound/soc/codecs/wm8804.c
+++ b/sound/soc/codecs/wm8804.c
@@ -643,6 +643,14 @@ static int wm8804_probe(struct snd_soc_codec *codec)
                 goto err_reg_enable;
         }
 
+        ret = snd_soc_read(codec, WM8804_DEVREV);
+        if (ret < 0) {
+                dev_err(codec->dev, "Failed to read device revision: %d\n",
+                        ret);
+                goto err_reg_enable;
+        }
+        dev_info(codec->dev, "revision %c\n", ret + 'A');
+
         ret = wm8804_reset(codec);
         if (ret < 0) {
                 dev_err(codec->dev, "Failed to issue reset: %d\n", ret);