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| author | Axel Lin <axel.lin@gmail.com> | 2011-11-01 15:17:57 +0800 |
|---|---|---|
| committer | Mark Brown <broonie@opensource.wolfsonmicro.com> | 2011-11-08 11:02:31 +0000 |
| commit | e94de1e864d2d205e4e503b0f083c07f288b45fe (patch) | |
| tree | addaac58ce6878d83b86d137036996bbf0f4f2ed /sound/soc/codecs/cs42l51.c | |
| parent | 65ff03f4624d12ad6c19a01a0af7385eda09e4a6 (diff) | |
| download | linux-e94de1e864d2d205e4e503b0f083c07f288b45fe.tar.gz linux-e94de1e864d2d205e4e503b0f083c07f288b45fe.tar.bz2 linux-e94de1e864d2d205e4e503b0f083c07f288b45fe.zip | |
ASoC: Avoid a redundant read in cs42l51_pdn_event
snd_soc_update_bits already does read-modify-write,
no need to read the register before calling snd_soc_update_bits.
Signed-off-by: Axel Lin <axel.lin@gmail.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Diffstat (limited to 'sound/soc/codecs/cs42l51.c')
| -rw-r--r-- | sound/soc/codecs/cs42l51.c | 13 |
1 files changed, 5 insertions, 8 deletions
diff --git a/sound/soc/codecs/cs42l51.c b/sound/soc/codecs/cs42l51.c index 8c3c8205d19e..00718b5e747b 100644 --- a/sound/soc/codecs/cs42l51.c +++ b/sound/soc/codecs/cs42l51.c @@ -175,21 +175,18 @@ static const struct snd_kcontrol_new cs42l51_snd_controls[] = { static int cs42l51_pdn_event(struct snd_soc_dapm_widget *w, struct snd_kcontrol *kcontrol, int event) { - unsigned long value; - - value = snd_soc_read(w->codec, CS42L51_POWER_CTL1); - value &= ~CS42L51_POWER_CTL1_PDN; - switch (event) { case SND_SOC_DAPM_PRE_PMD: - value |= CS42L51_POWER_CTL1_PDN; + snd_soc_update_bits(w->codec, CS42L51_POWER_CTL1, + CS42L51_POWER_CTL1_PDN, + CS42L51_POWER_CTL1_PDN); break; default: case SND_SOC_DAPM_POST_PMD: + snd_soc_update_bits(w->codec, CS42L51_POWER_CTL1, + CS42L51_POWER_CTL1_PDN, 0); break; } - snd_soc_update_bits(w->codec, CS42L51_POWER_CTL1, - CS42L51_POWER_CTL1_PDN, value); return 0; } |