restore hw registers after power loss during a suspend/resume cycle.

Signed-off-by: Sugar Zhang sugar.zhang@rock-chips.com ---

sound/soc/rockchip/rockchip_spdif.c | 26 ++++++++++++++++++++++++++ 1 file changed, 26 insertions(+)

diff --git a/sound/soc/rockchip/rockchip_spdif.c b/sound/soc/rockchip/rockchip_spdif.c index 100781e..00ae0e5 100644 --- a/sound/soc/rockchip/rockchip_spdif.c +++ b/sound/soc/rockchip/rockchip_spdif.c @@ -392,9 +392,35 @@ static int rk_spdif_remove(struct platform_device *pdev) return 0; }

+#ifdef CONFIG_PM_SLEEP +static int rockchip_spdif_suspend(struct device *dev) +{ + struct rk_spdif_dev *spdif = dev_get_drvdata(dev); + + regcache_mark_dirty(spdif->regmap); + + return 0; +} + +static int rockchip_spdif_resume(struct device *dev) +{ + struct rk_spdif_dev *spdif = dev_get_drvdata(dev); + int ret; + + ret = pm_runtime_get_sync(dev); + if (ret < 0) + return ret; + ret = regcache_sync(spdif->regmap); + pm_runtime_put(dev); + + return ret; +} +#endif + static const struct dev_pm_ops rk_spdif_pm_ops = { SET_RUNTIME_PM_OPS(rk_spdif_runtime_suspend, rk_spdif_runtime_resume, NULL) + SET_SYSTEM_SLEEP_PM_OPS(rockchip_spdif_suspend, rockchip_spdif_resume) };

static struct platform_driver rk_spdif_driver = {