We could disable biu clk and power-off genpd if gpio
card detect available.
Signed-off-by: Shawn Lin <shawn.lin@xxxxxxxxxxxxxx>
---
drivers/mmc/host/dw_mmc-rockchip.c | 18 +++++++++++++++++-
1 file changed, 17 insertions(+), 1 deletion(-)
diff --git a/drivers/mmc/host/dw_mmc-rockchip.c b/drivers/mmc/host/dw_mmc-rockchip.c
index 28e0220..7528720 100644
--- a/drivers/mmc/host/dw_mmc-rockchip.c
+++ b/drivers/mmc/host/dw_mmc-rockchip.c
@@ -13,6 +13,7 @@
#include <linux/mmc/host.h>
#include <linux/mmc/dw_mmc.h>
#include <linux/of_address.h>
+#include <linux/mmc/slot-gpio.h>
#include <linux/pm_runtime.h>
#include <linux/slab.h>
@@ -366,14 +367,29 @@ static int dw_mci_rockchip_remove(struct platform_device *pdev)
static int dw_mci_rockchip_runtime_suspend(struct device *dev)
{
struct dw_mci *host = dev_get_drvdata(dev);
+ int ret;
+
+ ret = dw_mci_runtime_suspend(host);
+ if (ret)
+ return ret;
- return dw_mci_runtime_suspend(host);
+ if (host->cur_slot &&
+ (mmc_can_gpio_cd(host->cur_slot->mmc) ||
+ !mmc_card_is_removable(host->cur_slot->mmc)))
+ clk_disable_unprepare(host->biu_clk);
+
+ return 0;
}
static int dw_mci_rockchip_runtime_resume(struct device *dev)
{
struct dw_mci *host = dev_get_drvdata(dev);
+ if (host->cur_slot &&
+ (mmc_can_gpio_cd(host->cur_slot->mmc) ||
+ !mmc_card_is_removable(host->cur_slot->mmc)))
+ clk_prepare_enable(host->biu_clk);
+
return dw_mci_runtime_resume(host);
}
#endif /* CONFIG_PM */
--
2.3.7
--
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