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@opensource.cirrus.com --- 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; }