This is a note to let you know that I've just added the patch titled
ASoC: sgtl5000: remove useless register write clearing CHRGPUMP_POWERUP
to the 3.10-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
asoc-sgtl5000-remove-useless-register-write-clearing-chrgpump_powerup.patch
and it can be found in the queue-3.10 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From c7d910b87d3c8e9fcf4077089ca4327c12eee099 Mon Sep 17 00:00:00 2001
From: Eric Nelson <eric.nelson@xxxxxxxxxxxxxxxxxxx>
Date: Fri, 27 Feb 2015 08:06:45 -0700
Subject: ASoC: sgtl5000: remove useless register write clearing CHRGPUMP_POWERUP
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: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
sound/soc/codecs/sgtl5000.c | 8 +-------
1 file changed, 1 insertion(+), 7 deletions(-)
--- a/sound/soc/codecs/sgtl5000.c
+++ b/sound/soc/codecs/sgtl5000.c
@@ -1111,13 +1111,7 @@ static int sgtl5000_set_power_regs(struc
/* 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 <<
Patches currently in stable-queue which might be from eric.nelson@xxxxxxxxxxxxxxxxxxx are
queue-3.10/asoc-sgtl5000-remove-useless-register-write-clearing-chrgpump_powerup.patch
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