diff options
| author | Richard Fitzgerald <rf@opensource.cirrus.com> | 2023-09-13 18:00:10 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2023-10-06 15:56:55 +0300 |
| commit | cbc43ddd5ce278d44a3e45b9831a7b2f9f7f1787 (patch) | |
| tree | f0e45bc9e2dfd7f71c574f83594b4ced20facdf7 /sound | |
| parent | 019f01f81887ab9c5cac4576bbce8b4502583b57 (diff) | |
| download | linux-cbc43ddd5ce278d44a3e45b9831a7b2f9f7f1787.tar.xz | |
ASoC: cs42l42: Ensure a reset pulse meets minimum pulse width.
[ 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@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>
Diffstat (limited to 'sound')
| -rw-r--r-- | sound/soc/codecs/cs42l42.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/sound/soc/codecs/cs42l42.c b/sound/soc/codecs/cs42l42.c index 2fefbcf7bd13..914cdd737fa3 100644 --- a/sound/soc/codecs/cs42l42.c +++ b/sound/soc/codecs/cs42l42.c @@ -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); |