linux-kernel - [PATCH 02/10] ASoC: wm8711: Convert to snd_soc_cache

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Date:	Thu, 06 Oct 2011 14:13:02 +0800
From:	Axel Lin <axel.lin@...il.com>
To:	linux-kernel@...r.kernel.org
Cc:	Mike Arthur <linux@...fsonmicro.com>,
	Mark Brown <broonie@...nsource.wolfsonmicro.com>,
	Ian Lartey <ian@...nsource.wolfsonmicro.com>,
	Dimitris Papastamos <dp@...nsource.wolfsonmicro.com>,
	Liam Girdwood <lrg@...com>, alsa-devel@...a-project.org
Subject: [PATCH 02/10] ASoC: wm8711: 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@...il.com>
---
 sound/soc/codecs/wm8711.c |   19 ++++++++-----------
 1 files changed, 8 insertions(+), 11 deletions(-)

diff --git a/sound/soc/codecs/wm8711.c b/sound/soc/codecs/wm8711.c
index 47c7fd5..b489edf 100644
--- a/sound/soc/codecs/wm8711.c
+++ b/sound/soc/codecs/wm8711.c
@@ -291,6 +291,7 @@ static int wm8711_set_dai_fmt(struct snd_soc_dai *codec_dai,
 static int wm8711_set_bias_level(struct snd_soc_codec *codec,
 	enum snd_soc_bias_level level)
 {
+	int ret;
 	u16 reg = snd_soc_read(codec, WM8711_PWR) & 0xff7f;
 
 	switch (level) {
@@ -300,6 +301,13 @@ static int wm8711_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) {
+			ret = snd_soc_cache_sync(codec);
+			if (ret < 0) {
+				dev_err(codec->dev, "Failed to sync cache: %d\n", ret);
+				return ret;
+			}
+		}
 		snd_soc_write(codec, WM8711_PWR, reg | 0x0040);
 		break;
 	case SND_SOC_BIAS_OFF:
@@ -346,18 +354,7 @@ static int wm8711_suspend(struct snd_soc_codec *codec, pm_message_t state)
 
 static int wm8711_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(wm8711_reg); i++) {
-		data[0] = (i << 1) | ((cache[i] >> 8) & 0x0001);
-		data[1] = cache[i] & 0x00ff;
-		codec->hw_write(codec->control_data, data, 2);
-	}
 	wm8711_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
-
 	return 0;
 }
 
-- 
1.7.4.1



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