From d8707cecdf396bdb506252829d03837b2c67c939 Mon Sep 17 00:00:00 2001 From: Peter Ujfalusi Date: Mon, 19 Oct 2009 15:42:19 +0300 Subject: [PATCH] ASoC: TWL4030: Only update the needed bits in *set_dai_sysclk Do not rewrite the whole register, but only update the needed bits in set_dai_sysclk functions. Signed-off-by: Peter Ujfalusi Signed-off-by: Mark Brown --- sound/soc/codecs/twl4030.c | 22 ++++++++++++---------- 1 file changed, 12 insertions(+), 10 deletions(-) diff --git a/sound/soc/codecs/twl4030.c b/sound/soc/codecs/twl4030.c index 4df7c6c..559e9b2 100644 --- a/sound/soc/codecs/twl4030.c +++ b/sound/soc/codecs/twl4030.c @@ -1785,19 +1785,21 @@ static int twl4030_set_dai_sysclk(struct snd_soc_dai *codec_dai, { struct snd_soc_codec *codec = codec_dai->codec; struct twl4030_priv *twl4030 = codec->private_data; - u8 infreq; + u8 apll_ctrl; + apll_ctrl = twl4030_read_reg_cache(codec, TWL4030_REG_APLL_CTL); + apll_ctrl &= ~TWL4030_APLL_INFREQ; switch (freq) { case 19200000: - infreq = TWL4030_APLL_INFREQ_19200KHZ; + apll_ctrl |= TWL4030_APLL_INFREQ_19200KHZ; twl4030->sysclk = 19200; break; case 26000000: - infreq = TWL4030_APLL_INFREQ_26000KHZ; + apll_ctrl |= TWL4030_APLL_INFREQ_26000KHZ; twl4030->sysclk = 26000; break; case 38400000: - infreq = TWL4030_APLL_INFREQ_38400KHZ; + apll_ctrl |= TWL4030_APLL_INFREQ_38400KHZ; twl4030->sysclk = 38400; break; default: @@ -1806,8 +1808,7 @@ static int twl4030_set_dai_sysclk(struct snd_soc_dai *codec_dai, return -EINVAL; } - infreq |= TWL4030_APLL_EN; - twl4030_write(codec, TWL4030_REG_APLL_CTL, infreq); + twl4030_write(codec, TWL4030_REG_APLL_CTL, apll_ctrl); return 0; } @@ -1989,11 +1990,13 @@ static int twl4030_voice_set_dai_sysclk(struct snd_soc_dai *codec_dai, int clk_id, unsigned int freq, int dir) { struct snd_soc_codec *codec = codec_dai->codec; - u8 infreq; + u8 apll_ctrl; + apll_ctrl = twl4030_read_reg_cache(codec, TWL4030_REG_APLL_CTL); + apll_ctrl &= ~TWL4030_APLL_INFREQ; switch (freq) { case 26000000: - infreq = TWL4030_APLL_INFREQ_26000KHZ; + apll_ctrl |= TWL4030_APLL_INFREQ_26000KHZ; break; default: printk(KERN_ERR "TWL4030 voice set sysclk: unknown rate %d\n", @@ -2001,8 +2004,7 @@ static int twl4030_voice_set_dai_sysclk(struct snd_soc_dai *codec_dai, return -EINVAL; } - infreq |= TWL4030_APLL_EN; - twl4030_write(codec, TWL4030_REG_APLL_CTL, infreq); + twl4030_write(codec, TWL4030_REG_APLL_CTL, apll_ctrl); return 0; } -- 2.7.4