[alsa-devel] [PATCH V2 2/2] ASoC: sgtl5000: Fix VDDA and VDDIO comparison

[Marek Vasut]

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 <marex at denx.de>
Cc: Fabio Estevam <festevam at gmail.com>
Cc: Igor Opaniuk <igor.opaniuk at toradex.com>
Cc: Marcel Ziswiler <marcel.ziswiler at toradex.com>
Cc: Mark Brown <broonie at kernel.org>
Cc: Oleksandr Suvorov <oleksandr.suvorov at toradex.com>
---
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 <<
 				    SGTL5000_VDDC_MAN_ASSN_SHIFT;
-- 
2.24.1