linux-kernel - [PATCH 2/2] ASoC: ad193x: Use snd_soc_update

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Message-ID: <1318582987.19976.2.camel@phoenix>
Date:	Fri, 14 Oct 2011 17:03:07 +0800
From:	Axel Lin <axel.lin@...il.com>
To:	linux-kernel@...r.kernel.org
Cc:	Liam Girdwood <lrg@...com>,
	Mark Brown <broonie@...nsource.wolfsonmicro.com>,
	Barry Song <21cnbao@...il.com>, alsa-devel@...a-project.org
Subject: [PATCH 2/2] ASoC: ad193x: Use snd_soc_update_bits for
 read-modify-write

Use snd_soc_update_bits for read-modify-write register access instead of
open-coding it using snd_soc_read and snd_soc_write

Signed-off-by: Axel Lin <axel.lin@...il.com>
---
 sound/soc/codecs/ad193x.c |   25 ++++++++++++-------------
 1 files changed, 12 insertions(+), 13 deletions(-)

diff --git a/sound/soc/codecs/ad193x.c b/sound/soc/codecs/ad193x.c
index 39056ce..1dc8404 100644
--- a/sound/soc/codecs/ad193x.c
+++ b/sound/soc/codecs/ad193x.c
@@ -106,8 +106,10 @@ static int ad193x_mute(struct snd_soc_dai *dai, int mute)
 	int reg;
 
 	reg = snd_soc_read(codec, AD193X_DAC_CTRL2);
-	reg = (mute > 0) ? reg | AD193X_DAC_MASTER_MUTE : reg &
-		(~AD193X_DAC_MASTER_MUTE);
+	if (mute)
+		reg |= AD193X_DAC_MASTER_MUTE;
+	else
+		reg &= ~AD193X_DAC_MASTER_MUTE;
 	snd_soc_write(codec, AD193X_DAC_CTRL2, reg);
 
 	return 0;
@@ -262,7 +264,7 @@ static int ad193x_hw_params(struct snd_pcm_substream *substream,
 		struct snd_pcm_hw_params *params,
 		struct snd_soc_dai *dai)
 {
-	int word_len = 0, reg = 0, master_rate = 0;
+	int word_len = 0, master_rate = 0;
 
 	struct snd_soc_pcm_runtime *rtd = substream->private_data;
 	struct snd_soc_codec *codec = rtd->codec;
@@ -297,18 +299,15 @@ static int ad193x_hw_params(struct snd_pcm_substream *substream,
 		break;
 	}
 
-	reg = snd_soc_read(codec, AD193X_PLL_CLK_CTRL0);
-	reg = (reg & (~AD193X_PLL_INPUT_MASK)) | master_rate;
-	snd_soc_write(codec, AD193X_PLL_CLK_CTRL0, reg);
+	snd_soc_update_bits(codec, AD193X_PLL_CLK_CTRL0,
+			    AD193X_PLL_INPUT_MASK, master_rate);
 
-	reg = snd_soc_read(codec, AD193X_DAC_CTRL2);
-	reg = (reg & (~AD193X_DAC_WORD_LEN_MASK))
-		| (word_len << AD193X_DAC_WORD_LEN_SHFT);
-	snd_soc_write(codec, AD193X_DAC_CTRL2, reg);
+	snd_soc_update_bits(codec, AD193X_DAC_CTRL2,
+			    AD193X_DAC_WORD_LEN_MASK,
+			    word_len << AD193X_DAC_WORD_LEN_SHFT);
 
-	reg = snd_soc_read(codec, AD193X_ADC_CTRL1);
-	reg = (reg & (~AD193X_ADC_WORD_LEN_MASK)) | word_len;
-	snd_soc_write(codec, AD193X_ADC_CTRL1, reg);
+	snd_soc_update_bits(codec, AD193X_ADC_CTRL1,
+			    AD193X_ADC_WORD_LEN_MASK, word_len);
 
 	return 0;
 }
-- 
1.7.4.1



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