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| author | Richard Fitzgerald <rf@opensource.cirrus.com> | 2023-09-13 16:00:11 +0100 |
|---|---|---|
| committer | Mark Brown <broonie@kernel.org> | 2023-09-13 16:03:20 +0100 |
| commit | a479b44ac0a0ac25cd48e5356200078924d78022 (patch) | |
| tree | e43297fbe928d59b7604f41261b8e6481008a8dd /sound | |
| parent | 41dac81b56c82c51a6d00fda5f3af7691ffee2d7 (diff) | |
| download | linux-a479b44ac0a0ac25cd48e5356200078924d78022.tar.gz linux-a479b44ac0a0ac25cd48e5356200078924d78022.tar.bz2 linux-a479b44ac0a0ac25cd48e5356200078924d78022.zip | |
ASoC: cs42l42: Don't rely on GPIOD_OUT_LOW to set RESET initially low
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>
Diffstat (limited to 'sound')
| -rw-r--r-- | sound/soc/codecs/cs42l42.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/sound/soc/codecs/cs42l42.c b/sound/soc/codecs/cs42l42.c index 56d2857a4f01..dc93861ddfb0 100644 --- a/sound/soc/codecs/cs42l42.c +++ b/sound/soc/codecs/cs42l42.c @@ -2321,6 +2321,12 @@ 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); |