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ALSA: hda: cs35l41: Assert Reset prior to de-asserting in probe and system resume
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>
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@ -840,6 +840,7 @@ static int cs35l41_system_resume(struct device *dev)
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}
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if (cs35l41->reset_gpio) {
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gpiod_set_value_cansleep(cs35l41->reset_gpio, 0);
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usleep_range(2000, 2100);
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gpiod_set_value_cansleep(cs35l41->reset_gpio, 1);
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}
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@ -1693,6 +1694,7 @@ int cs35l41_hda_probe(struct device *dev, const char *device_name, int id, int i
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}
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}
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if (cs35l41->reset_gpio) {
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gpiod_set_value_cansleep(cs35l41->reset_gpio, 0);
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usleep_range(2000, 2100);
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gpiod_set_value_cansleep(cs35l41->reset_gpio, 1);
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}
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