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authorAxel Lin <axel.lin@gmail.com>2011-10-06 07:00:19 +0400
committerMark Brown <broonie@opensource.wolfsonmicro.com>2011-10-06 23:02:55 +0400
commit416a0ce5f2338799f02fb41f6c56a6e490e4e8f0 (patch)
treee1675fa2d79b17789322e162a3eb4c815d5d1ccf /sound/soc/codecs/wm8990.c
parenta92f1394a184191d904872e0d3b8ef0c158e5021 (diff)
downloadlinux-416a0ce5f2338799f02fb41f6c56a6e490e4e8f0.tar.xz
ASoC: wm8990: Convert to snd_soc_cache_sync for sync reg_cache with the hardware
Signed-off-by: Axel Lin <axel.lin@gmail.com> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Diffstat (limited to 'sound/soc/codecs/wm8990.c')
-rw-r--r--sound/soc/codecs/wm8990.c32
1 files changed, 19 insertions, 13 deletions
diff --git a/sound/soc/codecs/wm8990.c b/sound/soc/codecs/wm8990.c
index 100aeee5ba96..48e9dd9975a2 100644
--- a/sound/soc/codecs/wm8990.c
+++ b/sound/soc/codecs/wm8990.c
@@ -36,6 +36,17 @@ struct wm8990_priv {
unsigned int pcmclk;
};
+static int wm8990_volatile_register(struct snd_soc_codec *codec,
+ unsigned int reg)
+{
+ switch (reg) {
+ case WM8990_RESET:
+ return 1;
+ default:
+ return 0;
+ }
+}
+
/*
* wm8990 register cache. Note that register 0 is not included in the
* cache.
@@ -1156,6 +1167,7 @@ static int wm8990_mute(struct snd_soc_dai *dai, int mute)
static int wm8990_set_bias_level(struct snd_soc_codec *codec,
enum snd_soc_bias_level level)
{
+ int ret;
u16 val;
switch (level) {
@@ -1171,6 +1183,12 @@ static int wm8990_set_bias_level(struct snd_soc_codec *codec,
case SND_SOC_BIAS_STANDBY:
if (codec->dapm.bias_level == SND_SOC_BIAS_OFF) {
+ ret = snd_soc_cache_sync(codec);
+ if (ret < 0) {
+ dev_err(codec->dev, "Failed to sync cache: %d\n", ret);
+ return ret;
+ }
+
/* Enable all output discharge bits */
snd_soc_write(codec, WM8990_ANTIPOP1, WM8990_DIS_LLINE |
WM8990_DIS_RLINE | WM8990_DIS_OUT3 |
@@ -1319,19 +1337,6 @@ static int wm8990_suspend(struct snd_soc_codec *codec, pm_message_t state)
static int wm8990_resume(struct snd_soc_codec *codec)
{
- int i;
- u8 data[2];
- u16 *cache = codec->reg_cache;
-
- /* Sync reg_cache with the hardware */
- for (i = 0; i < ARRAY_SIZE(wm8990_reg); i++) {
- if (i + 1 == WM8990_RESET)
- continue;
- data[0] = ((i + 1) << 1) | ((cache[i] >> 8) & 0x0001);
- data[1] = cache[i] & 0x00ff;
- codec->hw_write(codec->control_data, data, 2);
- }
-
wm8990_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
return 0;
}
@@ -1392,6 +1397,7 @@ static struct snd_soc_codec_driver soc_codec_dev_wm8990 = {
.reg_cache_size = ARRAY_SIZE(wm8990_reg),
.reg_word_size = sizeof(u16),
.reg_cache_default = wm8990_reg,
+ .volatile_register = wm8990_volatile_register,
};
#if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)