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ASoC: wm8940: Convert to snd_soc_cache_sync

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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>
This commit is contained in:
Axel Lin 2011-10-07 21:42:49 +08:00 committed by Mark Brown
parent abe11d0aac
commit 788b6e8efa
1 changed files with 22 additions and 24 deletions
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46
sound/soc/codecs/wm8940.c
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@ -45,6 +45,17 @@ struct wm8940_priv {
enum snd_soc_control_type control_type;
};
static int wm8940_volatile_register(struct snd_soc_codec *codec,
unsigned int reg)
{
switch (reg) {
case WM8940_SOFTRESET:
return 1;
default:
return 0;
}
}
static u16 wm8940_reg_defaults[] = {
0x8940, /* Soft Reset */
0x0000, /* Power 1 */
@ -459,6 +470,14 @@ static int wm8940_set_bias_level(struct snd_soc_codec *codec,
ret = snd_soc_write(codec, WM8940_POWER1, pwr_reg | 0x1);
break;
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;
}
}
/* ensure bufioen and biasen */
pwr_reg |= (1 << 2) | (1 << 3);
/* set vmid to 300k for standby */
@ -659,30 +678,8 @@ static int wm8940_suspend(struct snd_soc_codec *codec, pm_message_t state)
static int wm8940_resume(struct snd_soc_codec *codec)
{
int i;
int ret;
u8 data[3];
u16 *cache = codec->reg_cache;
/* Sync reg_cache with the hardware
* Could use auto incremented writes to speed this up
*/
for (i = 0; i < ARRAY_SIZE(wm8940_reg_defaults); i++) {
data[0] = i;
data[1] = (cache[i] & 0xFF00) >> 8;
data[2] = cache[i] & 0x00FF;
ret = codec->hw_write(codec->control_data, data, 3);
if (ret < 0)
goto error_ret;
else if (ret != 3) {
ret = -EIO;
goto error_ret;
}
}
ret = wm8940_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
error_ret:
return ret;
wm8940_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
return 0;
}
static int wm8940_probe(struct snd_soc_codec *codec)
@ -742,6 +739,7 @@ static struct snd_soc_codec_driver soc_codec_dev_wm8940 = {
.reg_cache_size = ARRAY_SIZE(wm8940_reg_defaults),
.reg_word_size = sizeof(u16),
.reg_cache_default = wm8940_reg_defaults,
.volatile_register = wm8940_volatile_register,
};
#if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)