On 09/30/2016 05:48 PM, Shawn Lin wrote:
> 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 3ad041c..e7b3b6d 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;
>
> - return dw_mci_runtime_suspend(host);
> + ret = dw_mci_runtime_suspend(host);
> + if (ret)
> + return ret;
> +
> + if (mmc_can_gpio_cd(host->slot[0]->mmc)) {
Can use cur_slot instead of slot[0]? And doesn't need to check "host->slot[]" or "host->cur_slot"?
Best Regards,
Jaehoon Chung
> + clk_disable_unprepare(host->biu_clk);
> + pm_runtime_put(dev);
> + }
> +
> + return 0;
> }
>
> static int dw_mci_rockchip_runtime_resume(struct device *dev)
> {
> struct dw_mci *host = dev_get_drvdata(dev);
>
> + if (mmc_can_gpio_cd(host->slot[0]->mmc)) {
> + pm_runtime_get_sync(dev);
> + clk_prepare_enable(host->biu_clk);
> + }
> +
> return dw_mci_runtime_resume(host);
> }
> #endif /* CONFIG_PM */
>
--
To unsubscribe from this list: send the line "unsubscribe linux-mmc" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
