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ASoC: cs42l42: Don't rely on GPIOD_OUT_LOW to set RESET initially low

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[ Upstream commit a479b44ac0a0ac25cd48e5356200078924d78022 ]

The ACPI setting for a GPIO default state has higher priority than the
flag passed to devm_gpiod_get_optional() so ACPI can override the
GPIOD_OUT_LOW. Explicitly set the GPIO low when hard resetting.

Although GPIOD_OUT_LOW can't be relied on this doesn't seem like a
reason to stop passing it to devm_gpiod_get_optional(). So we still pass
it to state our intent, but can deal with it having no effect.

Signed-off-by: Richard Fitzgerald <rf@opensource.cirrus.com>
Signed-off-by: Stefan Binding <sbinding@opensource.cirrus.com>
Link: https://lore.kernel.org/r/20230913150012.604775-3-sbinding@opensource.cirrus.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Richard Fitzgerald 2023-09-13 16:00:11 +01:00 committed by Greg Kroah-Hartman
parent cbc43ddd5c
commit 110e6f5750
1 changed files with 6 additions and 0 deletions
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6
sound/soc/codecs/cs42l42.c
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@ -2281,6 +2281,12 @@ int cs42l42_common_probe(struct cs42l42_private *cs42l42,
if (cs42l42->reset_gpio) {
dev_dbg(cs42l42->dev, "Found reset GPIO\n");
/*
* ACPI can override the default GPIO state we requested
* so ensure that we start with RESET low.
*/
gpiod_set_value_cansleep(cs42l42->reset_gpio, 0);
/* Ensure minimum reset pulse width */
usleep_range(10, 500);