ASoC: sgtl5000: remove useless register write clearing CHRGPUMP_POWERUP

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@boundarydevices.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
Cc: stable@vger.kernel.org

diff --git a/sound/soc/codecs/sgtl5000.c b/sound/soc/codecs/sgtl5000.c
index e182e6569bbd138713ec0047de606136254d81c4..3593a1496056d2aa7648142c67bd7952d5b589f6 100644 (file)
--- a/sound/soc/codecs/sgtl5000.c
+++ b/sound/soc/codecs/sgtl5000.c
@@ -1151,13 +1151,7 @@ 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 <<