linux-kernel - [PATCH 08/11] ASoC: wm8971: Convert to snd_soc

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Date:	Fri, 07 Oct 2011 07:54:15 +0800
From:	Axel Lin <axel.lin@...il.com>
To:	linux-kernel@...r.kernel.org
Cc:	Mark Brown <broonie@...nsource.wolfsonmicro.com>,
	Liam Girdwood <lrg@...com>, alsa-devel@...a-project.org,
	Kenneth Kiraly <kiraly@...126.com>
Subject: [PATCH 08/11] ASoC: wm8971: Convert to snd_soc_write

Convert codec->hw_write to snd_soc_write

Signed-off-by: Axel Lin <axel.lin@...il.com>
---
 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



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