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ASoC: cs42l42: Ensure a reset pulse meets minimum pulse width.

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[ Upstream commit 41dac81b56 ]

The CS42L42 can accept very short reset pulses of a few microseconds
but there's no reason to force a very short pulse.
Allow a wide range for the usleep_range() so it can be relaxed about
the choice of timing source.

Signed-off-by: Richard Fitzgerald <rf@opensource.cirrus.com>
Signed-off-by: Stefan Binding <sbinding@opensource.cirrus.com>
Link: https://lore.kernel.org/r/20230913150012.604775-2-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 16:00:10 +01:00
committed by Greg Kroah-Hartman
parent 019f01f818
commit cbc43ddd5c
1 changed files with 4 additions and 0 deletions
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4
sound/soc/codecs/cs42l42.c
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@@ -2280,6 +2280,10 @@ int cs42l42_common_probe(struct cs42l42_private *cs42l42,
if (cs42l42->reset_gpio) {
dev_dbg(cs42l42->dev, "Found reset GPIO\n");
/* Ensure minimum reset pulse width */
usleep_range(10, 500);
gpiod_set_value_cansleep(cs42l42->reset_gpio, 1);
}
usleep_range(CS42L42_BOOT_TIME_US, CS42L42_BOOT_TIME_US * 2);