[3.16.y-ckt stable] Patch "ASoC: sgtl5000: remove useless register write clearing CHRGPUMP_POWERUP" has been added to staging queue
Luis Henriques
luis.henriques at canonical.com
Mon Mar 30 13:00:14 UTC 2015
This is a note to let you know that I have just added a patch titled
ASoC: sgtl5000: remove useless register write clearing CHRGPUMP_POWERUP
to the linux-3.16.y-queue branch of the 3.16.y-ckt extended stable tree
which can be found at:
http://kernel.ubuntu.com/git?p=ubuntu/linux.git;a=shortlog;h=refs/heads/linux-3.16.y-queue
This patch is scheduled to be released in version 3.16.7-ckt10.
If you, or anyone else, feels it should not be added to this tree, please
reply to this email.
For more information about the 3.16.y-ckt tree, see
https://wiki.ubuntu.com/Kernel/Dev/ExtendedStable
Thanks.
-Luis
------
>From 41ccbde3b17ebcc10c107c3d9df78f7737356a3c Mon Sep 17 00:00:00 2001
From: Eric Nelson <eric.nelson at boundarydevices.com>
Date: Fri, 27 Feb 2015 08:06:45 -0700
Subject: ASoC: sgtl5000: remove useless register write clearing
CHRGPUMP_POWERUP
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 at boundarydevices.com>
Signed-off-by: Mark Brown <broonie at kernel.org>
Signed-off-by: Luis Henriques <luis.henriques at canonical.com>
---
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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