From: Shawn Lin <shawn.lin@rock-chips.com>
To: Jaehoon Chung <jh80.chung@samsung.com>,
Ulf Hansson <ulf.hansson@linaro.org>
Cc: linux-mmc@vger.kernel.org, Doug Anderson <dianders@chromium.org>,
linux-rockchip@lists.infradead.org,
Shawn Lin <shawn.lin@rock-chips.com>
Subject: [PATCH v2 4/9] mmc: dw_mmc: disable biu clk if possible
Date: Wed, 12 Oct 2016 10:50:38 +0800 [thread overview]
Message-ID: <1476240643-5701-5-git-send-email-shawn.lin@rock-chips.com> (raw)
In-Reply-To: <1476240643-5701-1-git-send-email-shawn.lin@rock-chips.com>
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>
---
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
next prev parent reply other threads:[~2016-10-12 2:46 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <CGME20161012024453epcas1p1bdc2c6bd18d864b5535bd2b067b491af@epcas1p1.samsung.com>
2016-10-12 2:50 ` [PATCH v2 0/9] Init runtime PM support for dw_mmc Shawn Lin
2016-10-12 2:50 ` [PATCH v2 1/9] mmc: dw_mmc: add runtime PM callback Shawn Lin
2016-10-12 2:50 ` [PATCH v2 2/9] mmc: dw_mmc-rockchip: add runtime PM support Shawn Lin
2016-10-12 2:50 ` [PATCH v2 3/9] mmc: core: expose the capability of gpio card detect Shawn Lin
2016-10-12 2:50 ` Shawn Lin [this message]
[not found] ` <1476240643-5701-1-git-send-email-shawn.lin-TNX95d0MmH7DzftRWevZcw@public.gmane.org>
2016-10-12 2:54 ` [PATCH v2 5/9] mmc: dw_mmc-k3: deploy runtime PM facilities Shawn Lin
2016-10-12 2:55 ` [PATCH v2 6/9] mmc: dw_mmc-exynos: " Shawn Lin
2016-10-12 2:56 ` [PATCH v2 7/9] mmc: dw_mmc-pci: " Shawn Lin
2016-10-12 2:56 ` [PATCH v2 8/9] mmc: dw_mmc-pltfm: " Shawn Lin
2016-10-12 2:56 ` [PATCH v2 9/9] mmc: dw_mmc: remove system PM callback Shawn Lin
2016-10-18 0:24 ` [PATCH v2 0/9] Init runtime PM support for dw_mmc Jaehoon Chung
2016-10-18 1:04 ` Shawn Lin
2016-10-18 8:46 ` Ulf Hansson
2016-10-18 10:45 ` Jaehoon Chung
[not found] ` <17f821c0-46d3-76e7-06dd-fbb415de37eb-Sze3O3UU22JBDgjK7y7TUQ@public.gmane.org>
2016-10-18 11:15 ` Ulf Hansson
2016-10-18 11:35 ` Shawn Lin
2016-10-18 13:26 ` Heiko Stübner
2016-10-21 1:56 ` Jaehoon Chung
2016-10-21 2:43 ` Shawn Lin
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