From f5eb9503e80e70c22e3d3f73a5d3c149c132407f Mon Sep 17 00:00:00 2001 From: Richard Fitzgerald Date: Tue, 8 Aug 2023 17:47:00 +0100 Subject: ASoC: cs35l56: Wait for control port ready during system-resume The CS35L56 could be hard-reset during a system suspend-resume cycle, either by the codec driver, in cs35l56_system_resume_early(), or by ACPI. After a hard reset the driver must wait for the control port to be ready (datasheet tIRS time) before attempting to access the CS35L56. Signed-off-by: Richard Fitzgerald Link: https://lore.kernel.org/r/20230808164702.21272-4-rf@opensource.cirrus.com Signed-off-by: Mark Brown --- sound/soc/codecs/cs35l56.c | 6 ++++++ 1 file changed, 6 insertions(+) (limited to 'sound/soc/codecs/cs35l56.c') diff --git a/sound/soc/codecs/cs35l56.c b/sound/soc/codecs/cs35l56.c index 9560059c867b..094bcbd0a174 100644 --- a/sound/soc/codecs/cs35l56.c +++ b/sound/soc/codecs/cs35l56.c @@ -952,6 +952,12 @@ int cs35l56_system_resume(struct device *dev) dev_dbg(dev, "system_resume\n"); + /* + * We might have done a hard reset or the CS35L56 was power-cycled + * so wait for control port to be ready. + */ + cs35l56_wait_control_port_ready(); + /* Undo pm_runtime_force_suspend() before re-enabling the irq */ ret = pm_runtime_force_resume(dev); if (cs35l56->base.irq) -- cgit v1.2.3