diff options
| author | Shengjiu Wang <shengjiu.wang@freescale.com> | 2017-07-12 18:01:07 +0800 |
|---|---|---|
| committer | Dong Aisheng <aisheng.dong@nxp.com> | 2019-11-25 15:54:17 +0800 |
| commit | c84933c819154957f09929ea8926854e459f7daa (patch) | |
| tree | ab987251ace47e39d2f98535a91dadd7ebac05bb /sound/soc/fsl/fsl_spdif.c | |
| parent | 38f89d3ce11e20437d326b4f6896d607174f5342 (diff) | |
MLK-15960-3: ASoC: fsl_spdif: refine pm runtime function
In imx8qm/imx8qxp, the power domain of IP is enabled when
pm_runtime_get_sync() is called, and disabled when pm_runtime
_put_sync() is called. when power domain is disabled, the value
of registers will lost, so we need to use the regcache_sync()
to restore the registers in fsl_spdif_runtime_resume.
Signed-off-by: Shengjiu Wang <shengjiu.wang@freescale.com>
Diffstat (limited to 'sound/soc/fsl/fsl_spdif.c')
| -rw-r--r-- | sound/soc/fsl/fsl_spdif.c | 29 |
1 files changed, 29 insertions, 0 deletions
diff --git a/sound/soc/fsl/fsl_spdif.c b/sound/soc/fsl/fsl_spdif.c index 5d350689c2fb..c2dcf385dbdb 100644 --- a/sound/soc/fsl/fsl_spdif.c +++ b/sound/soc/fsl/fsl_spdif.c @@ -16,6 +16,7 @@ #include <linux/of_device.h> #include <linux/of_irq.h> #include <linux/regmap.h> +#include <linux/pm_runtime.h> #include <sound/asoundef.h> #include <sound/dmaengine_pcm.h> @@ -1443,6 +1444,32 @@ static int fsl_spdif_probe(struct platform_device *pdev) return ret; } +#ifdef CONFIG_PM +static int fsl_spdif_runtime_resume(struct device *dev) +{ + struct fsl_spdif_priv *spdif_priv = dev_get_drvdata(dev); + + regcache_cache_only(spdif_priv->regmap, false); + regcache_mark_dirty(spdif_priv->regmap); + + regmap_update_bits(spdif_priv->regmap, REG_SPDIF_SRPC, + SRPC_CLKSRC_SEL_MASK | SRPC_GAINSEL_MASK, + spdif_priv->regcache_srpc); + + return regcache_sync(spdif_priv->regmap); +} + +static int fsl_spdif_runtime_suspend(struct device *dev) +{ + struct fsl_spdif_priv *spdif_priv = dev_get_drvdata(dev); + + regmap_read(spdif_priv->regmap, REG_SPDIF_SRPC, + &spdif_priv->regcache_srpc); + regcache_cache_only(spdif_priv->regmap, true); + return 0; +} +#endif + #ifdef CONFIG_PM_SLEEP static int fsl_spdif_suspend(struct device *dev) { @@ -1470,6 +1497,8 @@ static int fsl_spdif_resume(struct device *dev) static const struct dev_pm_ops fsl_spdif_pm = { SET_SYSTEM_SLEEP_PM_OPS(fsl_spdif_suspend, fsl_spdif_resume) + SET_RUNTIME_PM_OPS(fsl_spdif_runtime_suspend, fsl_spdif_runtime_resume, + NULL) }; static struct platform_driver fsl_spdif_driver = { |