linux-kernel - [PATCH 03/11] ASoC: wm8731: Convert to snd_soc

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Message-ID: <1317944877.5579.7.camel@phoenix>
Date:	Fri, 07 Oct 2011 07:47:57 +0800
From:	Axel Lin <axel.lin@...il.com>
To:	linux-kernel@...r.kernel.org
Cc:	Richard Purdie <rpurdie@...ys.net>,
	Mark Brown <broonie@...nsource.wolfsonmicro.com>,
	Liam Girdwood <lrg@...com>, alsa-devel@...a-project.org
Subject: [PATCH 03/11] ASoC: wm8731: 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/wm8731.c |   35 ++++++++++++++++++++++-------------
 1 files changed, 22 insertions(+), 13 deletions(-)

diff --git a/sound/soc/codecs/wm8731.c b/sound/soc/codecs/wm8731.c
index f76b6fc..853aed1 100644
--- a/sound/soc/codecs/wm8731.c
+++ b/sound/soc/codecs/wm8731.c
@@ -423,13 +423,31 @@ static int wm8731_set_dai_fmt(struct snd_soc_dai *codec_dai,
 	return 0;
 }
 
+static void wm8731_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 == WM8731_RESET || cache[i] == wm8731_reg[i])
+			continue;
+		snd_soc_write(codec, i, cache[i]);
+	}
+	codec->cache_bypass = 0;
+	codec->cache_sync = 0;
+}
+
 static int wm8731_set_bias_level(struct snd_soc_codec *codec,
 				 enum snd_soc_bias_level level)
 {
 	struct wm8731_priv *wm8731 = snd_soc_codec_get_drvdata(codec);
-	int i, ret;
-	u8 data[2];
-	u16 *cache = codec->reg_cache;
+	int ret;
 	u16 reg;
 
 	switch (level) {
@@ -444,16 +462,7 @@ static int wm8731_set_bias_level(struct snd_soc_codec *codec,
 			if (ret != 0)
 				return ret;
 
-			/* Sync reg_cache with the hardware */
-			for (i = 0; i < ARRAY_SIZE(wm8731_reg); i++) {
-				if (cache[i] == wm8731_reg[i])
-					continue;
-
-				data[0] = (i << 1) | ((cache[i] >> 8)
-						      & 0x0001);
-				data[1] = cache[i] & 0x00ff;
-				codec->hw_write(codec->control_data, data, 2);
-			}
+			wm8731_sync_cache(codec);
 		}
 
 		/* Clear PWROFF, gate CLKOUT, everything else as-is */
-- 
1.7.4.1



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