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 <peter.ujfalusi@nokia.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

diff --git a/sound/soc/codecs/twl4030.c b/sound/soc/codecs/twl4030.c
index 4df7c6c..559e9b2 100644 (file)
--- 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;
 }