diff options
| author | Ulf Hansson <ulf.hansson@linaro.org> | 2013-01-09 11:15:26 +0100 |
|---|---|---|
| committer | Russell King <rmk+kernel@arm.linux.org.uk> | 2013-01-23 10:16:59 +0000 |
| commit | 8259293aee1d44d7ebf0c644ef48db835653ebc3 (patch) | |
| tree | 89dbc3ab595a8eb96e7e4a9bab64a77561d977ae /drivers/mmc | |
| parent | 599c1d5c750ddf528c7c6d3cdc466708f0502e66 (diff) | |
ARM: 7622/1: mmc: mmci: Gate the clock in runtime suspend to save power
The amba bus is already performing same actions but for the apb_pclk.
So here we just make sure the clock to card is gated as well to save
more power. At runtime resume we will thus restore the clock again.
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Acked-by: Kevin Liu <kliu5@marvell.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Diffstat (limited to 'drivers/mmc')
| -rw-r--r-- | drivers/mmc/host/mmci.c | 29 |
1 files changed, 29 insertions, 0 deletions
diff --git a/drivers/mmc/host/mmci.c b/drivers/mmc/host/mmci.c index 3094ea3ed72..b43e1ab5cb5 100644 --- a/drivers/mmc/host/mmci.c +++ b/drivers/mmc/host/mmci.c @@ -1614,8 +1614,37 @@ static int mmci_resume(struct device *dev) } #endif +#ifdef CONFIG_PM_RUNTIME +static int mmci_runtime_suspend(struct device *dev) +{ + struct amba_device *adev = to_amba_device(dev); + struct mmc_host *mmc = amba_get_drvdata(adev); + + if (mmc) { + struct mmci_host *host = mmc_priv(mmc); + clk_disable_unprepare(host->clk); + } + + return 0; +} + +static int mmci_runtime_resume(struct device *dev) +{ + struct amba_device *adev = to_amba_device(dev); + struct mmc_host *mmc = amba_get_drvdata(adev); + + if (mmc) { + struct mmci_host *host = mmc_priv(mmc); + clk_prepare_enable(host->clk); + } + + return 0; +} +#endif + static const struct dev_pm_ops mmci_dev_pm_ops = { SET_SYSTEM_SLEEP_PM_OPS(mmci_suspend, mmci_resume) + SET_RUNTIME_PM_OPS(mmci_runtime_suspend, mmci_runtime_resume, NULL) }; static struct amba_id mmci_ids[] = { |