ASoC: cs4720: use snd_soc_cache_sync()

Replace the manual register restore mechanism in cs4270.c and call the
generic snd_soc_cache_sync() handler instead.

This factors code out in favour of core facilities and also fixes a
bus confusion that is most probably caused by intermixing i2c-regmap
functions and i2c_smbus_* accessors.

Signed-off-by: Daniel Mack <zonque@gmail.com>
Reported-and-tested-by: Sven Neumann <s.neumann@raumfeld.com>
Acked-by: Timur Tabi <timur@freescale.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

diff --git a/sound/soc/codecs/cs4270.c b/sound/soc/codecs/cs4270.c
index f1f237e..73f46eb 100644 (file)
--- a/sound/soc/codecs/cs4270.c
+++ b/sound/soc/codecs/cs4270.c
@@ -601,7 +601,6 @@ static int cs4270_soc_suspend(struct snd_soc_codec *codec, pm_message_t mesg)
 static int cs4270_soc_resume(struct snd_soc_codec *codec)
 {
        struct cs4270_private *cs4270 = snd_soc_codec_get_drvdata(codec);
-       struct i2c_client *i2c_client = to_i2c_client(codec->dev);
        int reg;
 
        regulator_bulk_enable(ARRAY_SIZE(cs4270->supplies),
@@ -612,14 +611,7 @@ static int cs4270_soc_resume(struct snd_soc_codec *codec)
        ndelay(500);
 
        /* first restore the entire register cache ... */
-       for (reg = CS4270_FIRSTREG; reg <= CS4270_LASTREG; reg++) {
-               u8 val = snd_soc_read(codec, reg);
-
-               if (i2c_smbus_write_byte_data(i2c_client, reg, val)) {
-                       dev_err(codec->dev, "i2c write failed\n");
-                       return -EIO;
-               }
-       }
+       snd_soc_cache_sync(codec);
 
        /* ... then disable the power-down bits */
        reg = snd_soc_read(codec, CS4270_PWRCTL);