[alsa-devel] [PATCH 3/3] ASoC: wm8900: Use snd_soc_update_bits for read-modify-write
Axel Lin
axel.lin at gmail.com
Sun Oct 16 17:30:21 CEST 2011
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 at gmail.com>
---
sound/soc/codecs/wm8900.c | 109 +++++++++++++++++---------------------------
1 files changed, 42 insertions(+), 67 deletions(-)
diff --git a/sound/soc/codecs/wm8900.c b/sound/soc/codecs/wm8900.c
index 86de396..3d0dc15 100644
--- a/sound/soc/codecs/wm8900.c
+++ b/sound/soc/codecs/wm8900.c
@@ -742,26 +742,20 @@ static int wm8900_set_fll(struct snd_soc_codec *codec,
{
struct wm8900_priv *wm8900 = snd_soc_codec_get_drvdata(codec);
struct _fll_div fll_div;
- unsigned int reg;
if (wm8900->fll_in == freq_in && wm8900->fll_out == freq_out)
return 0;
/* The digital side should be disabled during any change. */
- reg = snd_soc_read(codec, WM8900_REG_POWER1);
- snd_soc_write(codec, WM8900_REG_POWER1,
- reg & (~WM8900_REG_POWER1_FLL_ENA));
+ snd_soc_update_bits(codec, WM8900_REG_POWER1,
+ WM8900_REG_POWER1_FLL_ENA, 0);
/* Disable the FLL? */
if (!freq_in || !freq_out) {
- reg = snd_soc_read(codec, WM8900_REG_CLOCKING1);
- snd_soc_write(codec, WM8900_REG_CLOCKING1,
- reg & (~WM8900_REG_CLOCKING1_MCLK_SRC));
-
- reg = snd_soc_read(codec, WM8900_REG_FLLCTL1);
- snd_soc_write(codec, WM8900_REG_FLLCTL1,
- reg & (~WM8900_REG_FLLCTL1_OSC_ENA));
-
+ snd_soc_update_bits(codec, WM8900_REG_CLOCKING1,
+ WM8900_REG_CLOCKING1_MCLK_SRC, 0);
+ snd_soc_update_bits(codec, WM8900_REG_FLLCTL1,
+ WM8900_REG_FLLCTL1_OSC_ENA, 0);
wm8900->fll_in = freq_in;
wm8900->fll_out = freq_out;
@@ -796,15 +790,14 @@ static int wm8900_set_fll(struct snd_soc_codec *codec,
else
snd_soc_write(codec, WM8900_REG_FLLCTL6, 0);
- reg = snd_soc_read(codec, WM8900_REG_POWER1);
- snd_soc_write(codec, WM8900_REG_POWER1,
- reg | WM8900_REG_POWER1_FLL_ENA);
+ snd_soc_update_bits(codec, WM8900_REG_POWER1,
+ WM8900_REG_POWER1_FLL_ENA,
+ WM8900_REG_POWER1_FLL_ENA);
reenable:
- reg = snd_soc_read(codec, WM8900_REG_CLOCKING1);
- snd_soc_write(codec, WM8900_REG_CLOCKING1,
- reg | WM8900_REG_CLOCKING1_MCLK_SRC);
-
+ snd_soc_update_bits(codec, WM8900_REG_CLOCKING1,
+ WM8900_REG_CLOCKING1_MCLK_SRC,
+ WM8900_REG_CLOCKING1_MCLK_SRC);
return 0;
}
@@ -818,43 +811,35 @@ static int wm8900_set_dai_clkdiv(struct snd_soc_dai *codec_dai,
int div_id, int div)
{
struct snd_soc_codec *codec = codec_dai->codec;
- unsigned int reg;
switch (div_id) {
case WM8900_BCLK_DIV:
- reg = snd_soc_read(codec, WM8900_REG_CLOCKING1);
- snd_soc_write(codec, WM8900_REG_CLOCKING1,
- div | (reg & ~WM8900_REG_CLOCKING1_BCLK_MASK));
+ snd_soc_update_bits(codec, WM8900_REG_CLOCKING1,
+ WM8900_REG_CLOCKING1_BCLK_MASK, div);
break;
case WM8900_OPCLK_DIV:
- reg = snd_soc_read(codec, WM8900_REG_CLOCKING1);
- snd_soc_write(codec, WM8900_REG_CLOCKING1,
- div | (reg & ~WM8900_REG_CLOCKING1_OPCLK_MASK));
+ snd_soc_update_bits(codec, WM8900_REG_CLOCKING1,
+ WM8900_REG_CLOCKING1_OPCLK_MASK, div);
break;
case WM8900_DAC_LRCLK:
- reg = snd_soc_read(codec, WM8900_REG_AUDIO4);
- snd_soc_write(codec, WM8900_REG_AUDIO4,
- div | (reg & ~WM8900_LRC_MASK));
+ snd_soc_update_bits(codec, WM8900_REG_AUDIO4,
+ WM8900_LRC_MASK, div);
break;
case WM8900_ADC_LRCLK:
- reg = snd_soc_read(codec, WM8900_REG_AUDIO3);
- snd_soc_write(codec, WM8900_REG_AUDIO3,
- div | (reg & ~WM8900_LRC_MASK));
+ snd_soc_update_bits(codec, WM8900_REG_AUDIO3,
+ WM8900_LRC_MASK, div);
break;
case WM8900_DAC_CLKDIV:
- reg = snd_soc_read(codec, WM8900_REG_CLOCKING2);
- snd_soc_write(codec, WM8900_REG_CLOCKING2,
- div | (reg & ~WM8900_REG_CLOCKING2_DAC_CLKDIV));
+ snd_soc_update_bits(codec, WM8900_REG_CLOCKING2,
+ WM8900_REG_CLOCKING2_DAC_CLKDIV, div);
break;
case WM8900_ADC_CLKDIV:
- reg = snd_soc_read(codec, WM8900_REG_CLOCKING2);
- snd_soc_write(codec, WM8900_REG_CLOCKING2,
- div | (reg & ~WM8900_REG_CLOCKING2_ADC_CLKDIV));
+ snd_soc_update_bits(codec, WM8900_REG_CLOCKING2,
+ WM8900_REG_CLOCKING2_ADC_CLKDIV, div);
break;
case WM8900_LRCLK_MODE:
- reg = snd_soc_read(codec, WM8900_REG_DACCTRL);
- snd_soc_write(codec, WM8900_REG_DACCTRL,
- div | (reg & ~WM8900_REG_DACCTRL_AIF_LRCLKRATE));
+ snd_soc_update_bits(codec, WM8900_REG_DACCTRL,
+ WM8900_REG_DACCTRL_AIF_LRCLKRATE, div);
break;
default:
return -EINVAL;
@@ -1037,12 +1022,12 @@ static int wm8900_set_bias_level(struct snd_soc_codec *codec,
switch (level) {
case SND_SOC_BIAS_ON:
/* Enable thermal shutdown */
- reg = snd_soc_read(codec, WM8900_REG_GPIO);
- snd_soc_write(codec, WM8900_REG_GPIO,
- reg | WM8900_REG_GPIO_TEMP_ENA);
- reg = snd_soc_read(codec, WM8900_REG_ADDCTL);
- snd_soc_write(codec, WM8900_REG_ADDCTL,
- reg | WM8900_REG_ADDCTL_TEMP_SD);
+ snd_soc_update_bits(codec, WM8900_REG_GPIO,
+ WM8900_REG_GPIO_TEMP_ENA,
+ WM8900_REG_GPIO_TEMP_ENA);
+ snd_soc_update_bits(codec, WM8900_REG_ADDCTL,
+ WM8900_REG_ADDCTL_TEMP_SD,
+ WM8900_REG_ADDCTL_TEMP_SD);
break;
case SND_SOC_BIAS_PREPARE:
@@ -1205,26 +1190,16 @@ static int wm8900_probe(struct snd_soc_codec *codec)
wm8900_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
/* Latch the volume update bits */
- snd_soc_write(codec, WM8900_REG_LINVOL,
- snd_soc_read(codec, WM8900_REG_LINVOL) | 0x100);
- snd_soc_write(codec, WM8900_REG_RINVOL,
- snd_soc_read(codec, WM8900_REG_RINVOL) | 0x100);
- snd_soc_write(codec, WM8900_REG_LOUT1CTL,
- snd_soc_read(codec, WM8900_REG_LOUT1CTL) | 0x100);
- snd_soc_write(codec, WM8900_REG_ROUT1CTL,
- snd_soc_read(codec, WM8900_REG_ROUT1CTL) | 0x100);
- snd_soc_write(codec, WM8900_REG_LOUT2CTL,
- snd_soc_read(codec, WM8900_REG_LOUT2CTL) | 0x100);
- snd_soc_write(codec, WM8900_REG_ROUT2CTL,
- snd_soc_read(codec, WM8900_REG_ROUT2CTL) | 0x100);
- snd_soc_write(codec, WM8900_REG_LDAC_DV,
- snd_soc_read(codec, WM8900_REG_LDAC_DV) | 0x100);
- snd_soc_write(codec, WM8900_REG_RDAC_DV,
- snd_soc_read(codec, WM8900_REG_RDAC_DV) | 0x100);
- snd_soc_write(codec, WM8900_REG_LADC_DV,
- snd_soc_read(codec, WM8900_REG_LADC_DV) | 0x100);
- snd_soc_write(codec, WM8900_REG_RADC_DV,
- snd_soc_read(codec, WM8900_REG_RADC_DV) | 0x100);
+ snd_soc_update_bits(codec, WM8900_REG_LINVOL, 0x100, 0x100);
+ snd_soc_update_bits(codec, WM8900_REG_RINVOL, 0x100, 0x100);
+ snd_soc_update_bits(codec, WM8900_REG_LOUT1CTL, 0x100, 0x100);
+ snd_soc_update_bits(codec, WM8900_REG_ROUT1CTL, 0x100, 0x100);
+ snd_soc_update_bits(codec, WM8900_REG_LOUT2CTL, 0x100, 0x100);
+ snd_soc_update_bits(codec, WM8900_REG_ROUT2CTL, 0x100, 0x100);
+ snd_soc_update_bits(codec, WM8900_REG_LDAC_DV, 0x100, 0x100);
+ snd_soc_update_bits(codec, WM8900_REG_RDAC_DV, 0x100, 0x100);
+ snd_soc_update_bits(codec, WM8900_REG_LADC_DV, 0x100, 0x100);
+ snd_soc_update_bits(codec, WM8900_REG_RADC_DV, 0x100, 0x100);
/* Set the DAC and mixer output bias */
snd_soc_write(codec, WM8900_REG_OUTBIASCTL, 0x81);
--
1.7.4.1
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