From mboxrd@z Thu Jan 1 00:00:00 1970 From: Shawn Lin Subject: [PATCH v2 4/9] mmc: dw_mmc: disable biu clk if possible Date: Wed, 12 Oct 2016 10:50:38 +0800 Message-ID: <1476240643-5701-5-git-send-email-shawn.lin@rock-chips.com> References: <1476240643-5701-1-git-send-email-shawn.lin@rock-chips.com> Return-path: In-Reply-To: <1476240643-5701-1-git-send-email-shawn.lin@rock-chips.com> Sender: linux-mmc-owner@vger.kernel.org To: Jaehoon Chung , Ulf Hansson Cc: linux-mmc@vger.kernel.org, Doug Anderson , linux-rockchip@lists.infradead.org, Shawn Lin List-Id: linux-rockchip.vger.kernel.org We could disable biu clk if gpio card detect available, or it is a non-removable device. Signed-off-by: Shawn Lin --- 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 #include #include +#include #include #include 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