Convert to snd_soc_cache_sync for sync reg_cache with the hardware.
Signed-off-by: Axel Lin axel.lin@gmail.com --- sound/soc/codecs/wm8776.c | 33 +++++++++++++++++++-------------- 1 files changed, 19 insertions(+), 14 deletions(-)
diff --git a/sound/soc/codecs/wm8776.c b/sound/soc/codecs/wm8776.c index 00d8846..4f24446 100644 --- a/sound/soc/codecs/wm8776.c +++ b/sound/soc/codecs/wm8776.c @@ -37,6 +37,17 @@ struct wm8776_priv { int sysclk[2]; };
+static int wm8776_volatile_register(struct snd_soc_codec *codec, + unsigned int reg) +{ + switch (reg) { + case WM8776_RESET: + return 1; + default: + return 0; + } +} + static const u16 wm8776_reg[WM8776_CACHEREGNUM] = { 0x79, 0x79, 0x79, 0xff, 0xff, /* 4 */ 0xff, 0x00, 0x90, 0x00, 0x00, /* 9 */ @@ -301,6 +312,8 @@ static int wm8776_set_sysclk(struct snd_soc_dai *dai, static int wm8776_set_bias_level(struct snd_soc_codec *codec, enum snd_soc_bias_level level) { + int ret; + switch (level) { case SND_SOC_BIAS_ON: break; @@ -308,6 +321,11 @@ static int wm8776_set_bias_level(struct snd_soc_codec *codec, 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; + } /* Disable the global powerdown; DAPM does the rest */ snd_soc_update_bits(codec, WM8776_PWRDOWN, 1, 0); } @@ -379,21 +397,7 @@ static int wm8776_suspend(struct snd_soc_codec *codec, pm_message_t state)
static int wm8776_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(wm8776_reg); i++) { - if (cache[i] == wm8776_reg[i]) - continue; - data[0] = (i << 1) | ((cache[i] >> 8) & 0x0001); - data[1] = cache[i] & 0x00ff; - codec->hw_write(codec->control_data, data, 2); - } - wm8776_set_bias_level(codec, SND_SOC_BIAS_STANDBY); - return 0; } #else @@ -451,6 +455,7 @@ static struct snd_soc_codec_driver soc_codec_dev_wm8776 = { .reg_cache_size = ARRAY_SIZE(wm8776_reg), .reg_word_size = sizeof(u16), .reg_cache_default = wm8776_reg, + .volatile_register = wm8776_volatile_register, };
static const struct of_device_id wm8776_of_match[] = {