diff options
| author |   Shawn Lin <shawn.lin@rock-chips.com> | 2016-10-12 10:50:38 +0800 |
|---|---|---|
| committer |   Ulf Hansson <ulf.hansson@linaro.org> | 2016-11-29 09:00:38 +0100 |
| commit | 1f5c51d76e8f3040fd5c2e711d5760d696281307 (patch) | |
| tree | ee506678e7b9d32d888a24adcfee85e19ed2cdb5 /drivers/mmc/host | |
| parent | mmc: core: expose the capability of gpio card detect (diff) | |
| download | linux-dev-1f5c51d76e8f3040fd5c2e711d5760d696281307.tar.xz linux-dev-1f5c51d76e8f3040fd5c2e711d5760d696281307.zip | |
mmc: dw_mmc: disable biu clk if possible
We could disable biu clk if gpio card detect available,
or it is a non-removable device.
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>
Diffstat (limited to 'drivers/mmc/host')
| -rw-r--r-- | drivers/mmc/host/dw_mmc-rockchip.c | 1 | ||||
| -rw-r--r-- | drivers/mmc/host/dw_mmc.c | 13 |
2 files changed, 14 insertions, 0 deletions
diff --git a/drivers/mmc/host/dw_mmc-rockchip.c b/drivers/mmc/host/dw_mmc-rockchip.c index 0a05ad3c5fbf..9a46e4694227 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 875ce2d0ac87..7cf3394139e4 100644 --- a/drivers/mmc/host/dw_mmc.c +++ b/drivers/mmc/host/dw_mmc.c @@ -3337,6 +3337,11 @@ 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); @@ -3346,6 +3351,14 @@ 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; |