* [PATCH] ASoC: tlv320aic32x4: Use snd_soc_update_bits for read-modify-write
@ 2011-10-13 14:56 Axel Lin
2011-10-13 16:38 ` Mark Brown
0 siblings, 1 reply; 2+ messages in thread
From: Axel Lin @ 2011-10-13 14:56 UTC (permalink / raw)
To: linux-kernel
Cc: Wolfram Sang, Javier Martin, Liam Girdwood, Mark Brown,
alsa-devel
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@gmail.com>
---
This patch also fixes the mix usage of
AIC32X4_MDACEN/AIC32X4_NDACEN/AIC32X4_NADCEN/AIC32X4_MADCEN in current code.
(They are all defined as (0x01 << 7), so it is not a bug,
but not good for readability.)
Axel
sound/soc/codecs/tlv320aic32x4.c | 61 +++++++++++++++-----------------------
1 files changed, 24 insertions(+), 37 deletions(-)
diff --git a/sound/soc/codecs/tlv320aic32x4.c b/sound/soc/codecs/tlv320aic32x4.c
index a68982e..b21c610 100644
--- a/sound/soc/codecs/tlv320aic32x4.c
+++ b/sound/soc/codecs/tlv320aic32x4.c
@@ -528,40 +528,33 @@ static int aic32x4_set_bias_level(struct snd_soc_codec *codec,
enum snd_soc_bias_level level)
{
struct aic32x4_priv *aic32x4 = snd_soc_codec_get_drvdata(codec);
- u8 value;
switch (level) {
case SND_SOC_BIAS_ON:
if (aic32x4->master) {
/* Switch on PLL */
- value = snd_soc_read(codec, AIC32X4_PLLPR);
- snd_soc_write(codec, AIC32X4_PLLPR,
- (value | AIC32X4_PLLEN));
+ snd_soc_update_bits(codec, AIC32X4_PLLPR,
+ AIC32X4_PLLEN, AIC32X4_PLLEN);
/* Switch on NDAC Divider */
- value = snd_soc_read(codec, AIC32X4_NDAC);
- snd_soc_write(codec, AIC32X4_NDAC,
- value | AIC32X4_NDACEN);
+ snd_soc_update_bits(codec, AIC32X4_NDAC,
+ AIC32X4_NDACEN, AIC32X4_NDACEN);
/* Switch on MDAC Divider */
- value = snd_soc_read(codec, AIC32X4_MDAC);
- snd_soc_write(codec, AIC32X4_MDAC,
- value | AIC32X4_MDACEN);
+ snd_soc_update_bits(codec, AIC32X4_MDAC,
+ AIC32X4_MDACEN, AIC32X4_MDACEN);
/* Switch on NADC Divider */
- value = snd_soc_read(codec, AIC32X4_NADC);
- snd_soc_write(codec, AIC32X4_NADC,
- value | AIC32X4_MDACEN);
+ snd_soc_update_bits(codec, AIC32X4_NADC,
+ AIC32X4_NADCEN, AIC32X4_NADCEN);
/* Switch on MADC Divider */
- value = snd_soc_read(codec, AIC32X4_MADC);
- snd_soc_write(codec, AIC32X4_MADC,
- value | AIC32X4_MDACEN);
+ snd_soc_update_bits(codec, AIC32X4_MADC,
+ AIC32X4_MADCEN, AIC32X4_MADCEN);
/* Switch on BCLK_N Divider */
- value = snd_soc_read(codec, AIC32X4_BCLKN);
- snd_soc_write(codec, AIC32X4_BCLKN,
- value | AIC32X4_BCLKEN);
+ snd_soc_update_bits(codec, AIC32X4_BCLKN,
+ AIC32X4_BCLKEN, AIC32X4_BCLKEN);
}
break;
case SND_SOC_BIAS_PREPARE:
@@ -569,34 +562,28 @@ static int aic32x4_set_bias_level(struct snd_soc_codec *codec,
case SND_SOC_BIAS_STANDBY:
if (aic32x4->master) {
/* Switch off PLL */
- value = snd_soc_read(codec, AIC32X4_PLLPR);
- snd_soc_write(codec, AIC32X4_PLLPR,
- (value & ~AIC32X4_PLLEN));
+ snd_soc_update_bits(codec, AIC32X4_PLLPR,
+ AIC32X4_PLLEN, 0);
/* Switch off NDAC Divider */
- value = snd_soc_read(codec, AIC32X4_NDAC);
- snd_soc_write(codec, AIC32X4_NDAC,
- value & ~AIC32X4_NDACEN);
+ snd_soc_update_bits(codec, AIC32X4_NDAC,
+ AIC32X4_NDACEN, 0);
/* Switch off MDAC Divider */
- value = snd_soc_read(codec, AIC32X4_MDAC);
- snd_soc_write(codec, AIC32X4_MDAC,
- value & ~AIC32X4_MDACEN);
+ snd_soc_update_bits(codec, AIC32X4_MDAC,
+ AIC32X4_MDACEN, 0);
/* Switch off NADC Divider */
- value = snd_soc_read(codec, AIC32X4_NADC);
- snd_soc_write(codec, AIC32X4_NADC,
- value & ~AIC32X4_NDACEN);
+ snd_soc_update_bits(codec, AIC32X4_NADC,
+ AIC32X4_NADCEN, 0);
/* Switch off MADC Divider */
- value = snd_soc_read(codec, AIC32X4_MADC);
- snd_soc_write(codec, AIC32X4_MADC,
- value & ~AIC32X4_MDACEN);
- value = snd_soc_read(codec, AIC32X4_BCLKN);
+ snd_soc_update_bits(codec, AIC32X4_MADC,
+ AIC32X4_MADCEN, 0);
/* Switch off BCLK_N Divider */
- snd_soc_write(codec, AIC32X4_BCLKN,
- value & ~AIC32X4_BCLKEN);
+ snd_soc_update_bits(codec, AIC32X4_BCLKN,
+ AIC32X4_BCLKEN, 0);
}
break;
case SND_SOC_BIAS_OFF:
--
1.7.4.1
^ permalink raw reply related [flat|nested] 2+ messages in thread
* Re: [PATCH] ASoC: tlv320aic32x4: Use snd_soc_update_bits for read-modify-write
2011-10-13 14:56 [PATCH] ASoC: tlv320aic32x4: Use snd_soc_update_bits for read-modify-write Axel Lin
@ 2011-10-13 16:38 ` Mark Brown
0 siblings, 0 replies; 2+ messages in thread
From: Mark Brown @ 2011-10-13 16:38 UTC (permalink / raw)
To: Axel Lin
Cc: linux-kernel, Wolfram Sang, Javier Martin, Liam Girdwood,
alsa-devel
On Thu, Oct 13, 2011 at 10:56:34PM +0800, Axel Lin wrote:
> Use snd_soc_update_bits for read-modify-write register access instead of
> open-coding it using snd_soc_read and snd_soc_write.
Applied, thanks.
^ permalink raw reply [flat|nested] 2+ messages in thread
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