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ASoC: cs35l56: Wait for control port ready during system-resume

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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 <rf@opensource.cirrus.com>
Link: https://lore.kernel.org/r/20230808164702.21272-4-rf@opensource.cirrus.com
Signed-off-by: Mark Brown <broonie@kernel.org>
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Richard Fitzgerald 2023-08-08 17:47:00 +01:00 committed by Mark Brown
parent 853734588d
commit f5eb9503e8
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1 changed files with 6 additions and 0 deletions
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6
sound/soc/codecs/cs35l56.c
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@ -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)