From: Ulf Hansson <ulf.hansson@xxxxxxxxxx>
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@xxxxxxxxxx>
---
drivers/mmc/host/mmci.c | 29 +++++++++++++++++++++++++++++
1 file changed, 29 insertions(+)
diff --git a/drivers/mmc/host/mmci.c b/drivers/mmc/host/mmci.c
index aa04b42..0f397a2 100644
--- a/drivers/mmc/host/mmci.c
+++ b/drivers/mmc/host/mmci.c
@@ -1636,8 +1636,37 @@ 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[] = {
--
1.7.10
--
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