The ACPI setting for a GPIO default state has higher priority than the
flag passed to devm_gpiod_get_optional() so ACPI can override the
GPIOD_OUT_LOW. Explicitly set the GPIO low when hard resetting.
Although GPIOD_OUT_LOW can't be relied on this doesn't seem like a
reason to stop passing it to devm_gpiod_get_optional(). So we still pass
it to state our intent, but can deal with it having no effect.
Signed-off-by: Richard Fitzgerald <rf@xxxxxxxxxxxxxxxxxxxxx>
---
sound/soc/codecs/cs35l56.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/sound/soc/codecs/cs35l56.c b/sound/soc/codecs/cs35l56.c
index be400208205a..9560059c867b 100644
--- a/sound/soc/codecs/cs35l56.c
+++ b/sound/soc/codecs/cs35l56.c
@@ -1069,6 +1069,8 @@ int cs35l56_common_probe(struct cs35l56_private *cs35l56)
return dev_err_probe(cs35l56->base.dev, ret, "Failed to enable supplies\n");
if (cs35l56->base.reset_gpio) {
+ /* ACPI can override GPIOD_OUT_LOW flag so force it to start low */
+ gpiod_set_value_cansleep(cs35l56->base.reset_gpio, 0);
cs35l56_wait_min_reset_pulse();
gpiod_set_value_cansleep(cs35l56->base.reset_gpio, 1);
}
--
2.30.2
