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ALSA: hda: cs35l41: Assert Reset prior to de-asserting in probe and system resume

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To ensure we are in a known state, exiting from reset at the point of
probe or in system resume, assert reset before we de-assert it.

Since the BIOS may enter into a pre-boot environment to control the
amps (for example for boot beep), we need to ensure we start from a
known, reset state prior to probe or system resume.

Signed-off-by: Stefan Binding <sbinding@opensource.cirrus.com>
Link: https://lore.kernel.org/r/20231026150558.2105827-4-sbinding@opensource.cirrus.com
Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Stefan Binding 2023-10-26 16:05:53 +01:00 committed by Takashi Iwai
parent a7423e9019
commit fff393db71
1 changed files with 2 additions and 0 deletions
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2
sound/pci/hda/cs35l41_hda.c
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@ -840,6 +840,7 @@ static int cs35l41_system_resume(struct device *dev)
}
if (cs35l41->reset_gpio) {
gpiod_set_value_cansleep(cs35l41->reset_gpio, 0);
usleep_range(2000, 2100);
gpiod_set_value_cansleep(cs35l41->reset_gpio, 1);
}
@ -1693,6 +1694,7 @@ int cs35l41_hda_probe(struct device *dev, const char *device_name, int id, int i
}
}
if (cs35l41->reset_gpio) {
gpiod_set_value_cansleep(cs35l41->reset_gpio, 0);
usleep_range(2000, 2100);
gpiod_set_value_cansleep(cs35l41->reset_gpio, 1);
}