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From: Marek Vasut <>
Cc: Marek Vasut <>,
	Igor Opaniuk <>,
	Marcel Ziswiler <>,
	Oleksandr Suvorov <>,
	Mark Brown <>,
Subject: [alsa-devel] [PATCH V2 2/2] ASoC: sgtl5000: Fix VDDA and VDDIO comparison
Date: Fri, 20 Dec 2019 17:44:50 +0100
Message-ID: <> (raw)
In-Reply-To: <>

Comparing the voltage of VDDA and VDDIO to determine whether or not to
enable VDDC manual override is insufficient. This is a problem in case
the VDDA is supplied from different regulator than VDDIO, while both
report the same voltage to the regulator framework. In that case where
VDDA and VDDIO is supplied by different regulators, the VDDC manual
override must not be applied.

Fixes: b6319b061ba2 ("ASoC: sgtl5000: Fix charge pump source assignment")
Signed-off-by: Marek Vasut <>
Cc: Fabio Estevam <>
Cc: Igor Opaniuk <>
Cc: Marcel Ziswiler <>
Cc: Mark Brown <>
Cc: Oleksandr Suvorov <>
V2: Switch to regulator_is_equal() helper
 sound/soc/codecs/sgtl5000.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/sound/soc/codecs/sgtl5000.c b/sound/soc/codecs/sgtl5000.c
index 93da6b58c97df..d5130193b4a2f 100644
--- a/sound/soc/codecs/sgtl5000.c
+++ b/sound/soc/codecs/sgtl5000.c
@@ -1344,7 +1344,8 @@ static int sgtl5000_set_power_regs(struct snd_soc_component *component)
 		 * if vddio == vdda the source of charge pump should be
 		 * assigned manually to VDDIO
-		if (vddio == vdda) {
+		if (regulator_is_equal(sgtl5000->supplies[VDDA].consumer,
+				       sgtl5000->supplies[VDDIO].consumer)) {
 			lreg_ctrl |= SGTL5000_VDDC_ASSN_OVRD;
 			lreg_ctrl |= SGTL5000_VDDC_MAN_ASSN_VDDIO <<

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Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-12-20 16:44 [alsa-devel] [PATCH V2 1/2] regulator: core: Add regulator_is_equal() helper Marek Vasut
2019-12-20 16:44 ` Marek Vasut [this message]
2020-01-14 16:09   ` [alsa-devel] Applied "ASoC: sgtl5000: Fix VDDA and VDDIO comparison" to the asoc tree Mark Brown
2020-01-14 16:09 ` [alsa-devel] Applied "regulator: core: Add regulator_is_equal() helper" " Mark Brown
2020-01-14 19:48 ` [alsa-devel] [PATCH V2 1/2] regulator: core: Add regulator_is_equal() helper Pierre-Louis Bossart
2020-01-16 11:59   ` Mark Brown

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