[PATCH 3.16.y-ckt 019/144] ASoC: sgtl5000: remove useless register write clearing CHRGPUMP_POWERUP

From: Luis Henriques
Date: Tue Apr 21 2015 - 12:27:29 EST


3.16.7-ckt10 -stable review patch. If anyone has any objections, please let me know.

------------------

From: Eric Nelson <eric.nelson@xxxxxxxxxxxxxxxxxxx>

commit c7d910b87d3c8e9fcf4077089ca4327c12eee099 upstream.

The SGTL5000_CHIP_ANA_POWER register is cached. Update the cached
value instead of writing it directly.

Patch inspired by Russell King's more colorful remarks in this
patch:
https://github.com/SolidRun/linux-imx6-3.14/commit/dd4bf6a

Signed-off-by: Eric Nelson <eric.nelson@xxxxxxxxxxxxxxxxxxx>
Signed-off-by: Mark Brown <broonie@xxxxxxxxxx>
Signed-off-by: Luis Henriques <luis.henriques@xxxxxxxxxxxxx>
---
sound/soc/codecs/sgtl5000.c | 8 +-------
1 file changed, 1 insertion(+), 7 deletions(-)

diff --git a/sound/soc/codecs/sgtl5000.c b/sound/soc/codecs/sgtl5000.c
index a62d340aa98a..31281d24e009 100644
--- a/sound/soc/codecs/sgtl5000.c
+++ b/sound/soc/codecs/sgtl5000.c
@@ -1155,13 +1155,7 @@ static int sgtl5000_set_power_regs(struct snd_soc_codec *codec)
/* Enable VDDC charge pump */
ana_pwr |= SGTL5000_VDDC_CHRGPMP_POWERUP;
} else if (vddio >= 3100 && vdda >= 3100) {
- /*
- * if vddio and vddd > 3.1v,
- * charge pump should be clean before set ana_pwr
- */
- snd_soc_update_bits(codec, SGTL5000_CHIP_ANA_POWER,
- SGTL5000_VDDC_CHRGPMP_POWERUP, 0);
-
+ ana_pwr &= ~SGTL5000_VDDC_CHRGPMP_POWERUP;
/* VDDC use VDDIO rail */
lreg_ctrl |= SGTL5000_VDDC_ASSN_OVRD;
lreg_ctrl |= SGTL5000_VDDC_MAN_ASSN_VDDIO <<
--
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