From: Shawn Lin <shawn.lin-TNX95d0MmH7DzftRWevZcw@public.gmane.org>
To: Jaehoon Chung
<jh80.chung-Sze3O3UU22JBDgjK7y7TUQ@public.gmane.org>,
Ulf Hansson <ulf.hansson-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org>
Cc: linux-rockchip-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org,
Shawn Lin <shawn.lin-TNX95d0MmH7DzftRWevZcw@public.gmane.org>,
linux-mmc-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
Doug Anderson <dianders-F7+t8E8rja9g9hUCZPvPmw@public.gmane.org>
Subject: [PATCH 4/9] mmc: dw_mmc-rockchip: disable biu clk if possible
Date: Sun, 9 Oct 2016 21:49:05 +0800 [thread overview]
Message-ID: <1476020951-31292-4-git-send-email-shawn.lin@rock-chips.com> (raw)
In-Reply-To: <1476020951-31292-1-git-send-email-shawn.lin-TNX95d0MmH7DzftRWevZcw@public.gmane.org>
We could disable biu clk and power-off genpd if gpio
card detect available.
Signed-off-by: Shawn Lin <shawn.lin-TNX95d0MmH7DzftRWevZcw@public.gmane.org>
---
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
next prev parent reply other threads:[~2016-10-09 13:49 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-10-09 13:49 [PATCH 1/9] mmc: dw_mmc: add runtime PM callback Shawn Lin
2016-10-09 13:49 ` [PATCH 2/9] mmc: dw_mmc-rockchip: add runtime PM support Shawn Lin
2016-10-09 13:49 ` [PATCH 3/9] mmc: core: expose the capability of gpio card detect Shawn Lin
[not found] ` <1476020951-31292-1-git-send-email-shawn.lin-TNX95d0MmH7DzftRWevZcw@public.gmane.org>
2016-10-09 13:49 ` Shawn Lin [this message]
2016-10-09 13:49 ` [PATCH 5/9] mmc: dw_mmc-k3: deploay runtime PM facilities Shawn Lin
2016-10-09 13:50 ` [PATCH 6/9] mmc: dw_mmc-exynos: " Shawn Lin
2016-10-09 13:50 ` [PATCH 7/9] mmc: dw_mmc-pci: " Shawn Lin
2016-10-09 13:51 ` [PATCH 8/9] mmc: dw_mmc-pltfm: " Shawn Lin
2016-10-09 13:51 ` [PATCH 9/9] mmc: dw_mmc: remove system PM callback Shawn Lin
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