Some system suspend modes may remove power supplies.
To ensure we are not running during this time, we should assert reset.
Note: since the amps use a shared reset, asserting reset prior to
system suspend only works if the amps are suspended in the reverse
order to probe.
Signed-off-by: Stefan Binding <sbinding@xxxxxxxxxxxxxxxxxxxxx>
---
sound/pci/hda/cs35l41_hda.c | 13 ++++++++-----
1 file changed, 8 insertions(+), 5 deletions(-)
diff --git a/sound/pci/hda/cs35l41_hda.c b/sound/pci/hda/cs35l41_hda.c
index 28cb10ddd191..919e38213975 100644
--- a/sound/pci/hda/cs35l41_hda.c
+++ b/sound/pci/hda/cs35l41_hda.c
@@ -813,14 +813,17 @@ static int cs35l41_system_suspend(struct device *dev)
/* Shutdown DSP before system suspend */
ret = cs35l41_ready_for_reset(cs35l41);
-
if (ret)
dev_err(dev, "System Suspend Failed, not ready for Reset: %d\n", ret);
- /*
- * Reset GPIO may be shared, so cannot reset here.
- * However beyond this point, amps may be powered down.
- */
+ if (cs35l41->reset_gpio) {
+ dev_info(cs35l41->dev, "Asserting Reset\n");
+ gpiod_set_value_cansleep(cs35l41->reset_gpio, 0);
+ usleep_range(2000, 2100);
+ }
+
+ dev_dbg(cs35l41->dev, "System Suspended\n");
+
return ret;
}
--
2.34.1
