[PATCH 08/11] ASoC: wm8971: Convert to snd_soc_write

Axel Lin
2011-10-06T23:54:23Z

sound/soc/codecs/wm8971.c | 35 +++++++++++++++++++++++------------
1 files changed, 23 insertions(+), 12 deletions(-)

diff --git a/sound/soc/codecs/wm8971.c b/sound/soc/codecs/wm8971.c
index 08ea6f8..2265e00 100644
--- a/sound/soc/codecs/wm8971.c
+++ b/sound/soc/codecs/wm8971.c
@@ -533,6 +533,26 @@ static int wm8971_mute(struct snd_soc_dai *dai, int mute)
return 0;
}

+static void wm8971_sync_cache(struct snd_soc_codec *codec)
+{
+ short i;
+ u16 *cache;
+
+ if (!codec->cache_sync)
+ return;
+ codec->cache_only = 0;
+ codec->cache_bypass = 1;
+ /* restore cache */
+ cache = codec->reg_cache;
+ for (i = 0; i < codec->driver->reg_cache_size; i++) {
+ if (i == WM8971_RESET || cache[i] == wm8971_reg[i])
+ continue;
+ snd_soc_write(codec, i, cache[i]);
+ }
+ codec->cache_bypass = 0;
+ codec->cache_sync = 0;
+}
+
static int wm8971_set_bias_level(struct snd_soc_codec *codec,
enum snd_soc_bias_level level)
{
@@ -546,6 +566,9 @@ static int wm8971_set_bias_level(struct snd_soc_codec *codec,
case SND_SOC_BIAS_PREPARE:
break;
case SND_SOC_BIAS_STANDBY:
+ if (codec->dapm.bias_level == SND_SOC_BIAS_OFF)
+ wm8971_sync_cache(codec);
+
/* mute dac and set vmid to 500k, enable VREF */
snd_soc_write(codec, WM8971_PWR1, pwr_reg | 0x0140);
break;
@@ -605,20 +628,8 @@ static int wm8971_suspend(struct snd_soc_codec *codec, pm_message_t state)

static int wm8971_resume(struct snd_soc_codec *codec)
{
- int i;
- u8 data[2];
- u16 *cache = codec->reg_cache;
u16 reg;

- /* Sync reg_cache with the hardware */
- for (i = 0; i < ARRAY_SIZE(wm8971_reg); i++) {
- if (i == WM8971_RESET)
- continue;
- data[0] = (i << 1) | ((cache[i] >> 8) & 0x0001);
- data[1] = cache[i] & 0x00ff;
- codec->hw_write(codec->control_data, data, 2);
- }
-
wm8971_set_bias_level(codec, SND_SOC_BIAS_STANDBY);

/* charge wm8971 caps */
--
1.7.4.1