diff options
| author | Richard Fitzgerald <rf@opensource.cirrus.com> | 2023-09-13 16:00:10 +0100 |
|---|---|---|
| committer | Mark Brown <broonie@kernel.org> | 2023-09-13 16:03:19 +0100 |
| commit | 41dac81b56c82c51a6d00fda5f3af7691ffee2d7 (patch) | |
| tree | 4962e7a3891fb31d440398b58932f2f3f413602e | |
| parent | ec83a0b39a20d0d9617fa61ff2883404f0f90504 (diff) | |
ASoC: cs42l42: Ensure a reset pulse meets minimum pulse width.
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>
| -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 a0de0329406a..56d2857a4f01 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); |