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ASoC: fsl_xcvr: disable all interrupts when suspend happens

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There is an unhandled interrupt after suspend, which cause endless
interrupt when system resume, so system may hang.

Disable all interrupts in runtime suspend callback to avoid above
issue.

Fixes: 2856448686 ("ASoC: fsl_xcvr: Add XCVR ASoC CPU DAI driver")
Signed-off-by: Shengjiu Wang <shengjiu.wang@nxp.com>
Reviewed-by: Fabio Estevam <festevam@gmail.com>
Link: https://lore.kernel.org/r/1624019913-3380-1-git-send-email-shengjiu.wang@nxp.com
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Shengjiu Wang 2021-06-18 20:38:33 +08:00 committed by Mark Brown
parent 3aed3ddf96
commit ea837090b3
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1 changed files with 10 additions and 0 deletions
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10
sound/soc/fsl/fsl_xcvr.c
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@ -1233,6 +1233,16 @@ static __maybe_unused int fsl_xcvr_runtime_suspend(struct device *dev)
struct fsl_xcvr *xcvr = dev_get_drvdata(dev);
int ret;
/*
* Clear interrupts, when streams starts or resumes after
* suspend, interrupts are enabled in prepare(), so no need
* to enable interrupts in resume().
*/
ret = regmap_update_bits(xcvr->regmap, FSL_XCVR_EXT_IER0,
FSL_XCVR_IRQ_EARC_ALL, 0);
if (ret < 0)
dev_err(dev, "Failed to clear IER0: %d\n", ret);
/* Assert M0+ reset */
ret = regmap_update_bits(xcvr->regmap, FSL_XCVR_EXT_CTRL,
FSL_XCVR_EXT_CTRL_CORE_RESET,