diff options
| author | Axel Lin <axel.lin@gmail.com> | 2011-10-07 21:42:49 +0800 |
|---|---|---|
| committer | Mark Brown <broonie@opensource.wolfsonmicro.com> | 2011-10-10 10:29:58 +0100 |
| commit | 788b6e8efa052ab13fb6b9d957fbaf8e331008f9 (patch) | |
| tree | ad0d7183a8565831efcfbd376be7b9fdabeb3f86 | |
| parent | abe11d0aacc75eb400fc1c6e40b28703e481076e (diff) | |
| download | linux-788b6e8efa052ab13fb6b9d957fbaf8e331008f9.tar.bz2 | |
ASoC: wm8940: Convert to snd_soc_cache_sync
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>
| -rw-r--r-- | sound/soc/codecs/wm8940.c | 46 |
1 files changed, 22 insertions, 24 deletions
diff --git a/sound/soc/codecs/wm8940.c b/sound/soc/codecs/wm8940.c index 7e0f54c60d26..a4abfdfb217b 100644 --- a/sound/soc/codecs/wm8940.c +++ b/sound/soc/codecs/wm8940.c @@ -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) |