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| author | Shawn Lin <shawn.lin@rock-chips.com> | 2016-10-12 10:50:35 +0800 |
|---|---|---|
| committer | Ulf Hansson <ulf.hansson@linaro.org> | 2016-11-29 09:00:36 +0100 |
| commit | e9ed8835e99047422e09a192c0f61564d501d49b (patch) | |
| tree | 9c98fcf542cf7e9cf11ba9ffa96390f7984802b8 | |
| parent | 70562644f4ee15214986966720ffe82fad03e693 (diff) | |
| download | linux-e9ed8835e99047422e09a192c0f61564d501d49b.tar.bz2 | |
mmc: dw_mmc: add runtime PM callback
This patch add dw_mci_runtime_suspend/resume interfaces
and expose it to dw_mci variant driver to support runtime
PM.
Signed-off-by: Shawn Lin <shawn.lin@rock-chips.com>
Signed-off-by: Jaehoon Chung <jh80.chung@samsung.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
| -rw-r--r-- | drivers/mmc/host/dw_mmc.c | 32 | ||||
| -rw-r--r-- | drivers/mmc/host/dw_mmc.h | 4 |
2 files changed, 33 insertions, 3 deletions
diff --git a/drivers/mmc/host/dw_mmc.c b/drivers/mmc/host/dw_mmc.c index df478ae72e23..875ce2d0ac87 100644 --- a/drivers/mmc/host/dw_mmc.c +++ b/drivers/mmc/host/dw_mmc.c @@ -3267,7 +3267,7 @@ EXPORT_SYMBOL(dw_mci_remove); -#ifdef CONFIG_PM_SLEEP +#ifdef CONFIG_PM /* * TODO: we should probably disable the clock to the card in the suspend path. */ @@ -3325,7 +3325,35 @@ int dw_mci_resume(struct dw_mci *host) return 0; } EXPORT_SYMBOL(dw_mci_resume); -#endif /* CONFIG_PM_SLEEP */ + +int dw_mci_runtime_suspend(struct device *dev) +{ + int err = 0; + struct dw_mci *host = dev_get_drvdata(dev); + + err = dw_mci_suspend(host); + if (err) + return err; + + clk_disable_unprepare(host->ciu_clk); + + return err; +} +EXPORT_SYMBOL(dw_mci_runtime_suspend); + +int dw_mci_runtime_resume(struct device *dev) +{ + int ret = 0; + struct dw_mci *host = dev_get_drvdata(dev); + + ret = clk_prepare_enable(host->ciu_clk); + if (ret) + return ret; + + return dw_mci_resume(host); +} +EXPORT_SYMBOL(dw_mci_runtime_resume); +#endif /* CONFIG_PM */ static int __init dw_mci_init(void) { diff --git a/drivers/mmc/host/dw_mmc.h b/drivers/mmc/host/dw_mmc.h index e8cd2dec3263..d14a391eb709 100644 --- a/drivers/mmc/host/dw_mmc.h +++ b/drivers/mmc/host/dw_mmc.h @@ -234,9 +234,11 @@ extern int dw_mci_probe(struct dw_mci *host); extern void dw_mci_remove(struct dw_mci *host); -#ifdef CONFIG_PM_SLEEP +#ifdef CONFIG_PM extern int dw_mci_suspend(struct dw_mci *host); extern int dw_mci_resume(struct dw_mci *host); +extern int dw_mci_runtime_suspend(struct device *device); +extern int dw_mci_runtime_resume(struct device *device); #endif /** |