We could disable biu clk if gpio card detect available,
or it is a non-removable device.
Signed-off-by: Shawn Lin <shawn.lin@xxxxxxxxxxxxxx>
---
Changes in v2: None
drivers/mmc/host/dw_mmc-rockchip.c | 1 +
drivers/mmc/host/dw_mmc.c | 13 +++++++++++++
2 files changed, 14 insertions(+)
diff --git a/drivers/mmc/host/dw_mmc-rockchip.c b/drivers/mmc/host/dw_mmc-rockchip.c
index 0a05ad3..9a46e46 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>
diff --git a/drivers/mmc/host/dw_mmc.c b/drivers/mmc/host/dw_mmc.c
index 67fa088..297b6c2 100644
--- a/drivers/mmc/host/dw_mmc.c
+++ b/drivers/mmc/host/dw_mmc.c
@@ -3336,6 +3336,11 @@ int dw_mci_runtime_suspend(struct device *dev)
clk_disable_unprepare(host->ciu_clk);
+ 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 err;
}
EXPORT_SYMBOL(dw_mci_runtime_suspend);
@@ -3345,6 +3350,14 @@ int dw_mci_runtime_resume(struct device *dev)
int ret = 0;
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))) {
+ ret = clk_prepare_enable(host->biu_clk);
+ if (ret)
+ return ret;
+ }
+
ret = clk_prepare_enable(host->ciu_clk);
if (ret)
return ret;
--
2.3.7
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