6.5-stable review patch. If anyone has any objections, please let me know. ------------------ From: Richard Fitzgerald <rf@xxxxxxxxxxxxxxxxxxxxx> [ Upstream commit 41dac81b56c82c51a6d00fda5f3af7691ffee2d7 ] 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@xxxxxxxxxxxxxxxxxxxxx> Signed-off-by: Stefan Binding <sbinding@xxxxxxxxxxxxxxxxxxxxx> Link: https://lore.kernel.org/r/20230913150012.604775-2-sbinding@xxxxxxxxxxxxxxxxxxxxx Signed-off-by: Mark Brown <broonie@xxxxxxxxxx> Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx> --- sound/soc/codecs/cs42l42.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/sound/soc/codecs/cs42l42.c b/sound/soc/codecs/cs42l42.c index a0de0329406a1..56d2857a4f01c 100644 --- a/sound/soc/codecs/cs42l42.c +++ b/sound/soc/codecs/cs42l42.c @@ -2320,6 +2320,10 @@ 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); -- 2.40.1
