From mboxrd@z Thu Jan 1 00:00:00 1970 From: Shawn Lin Subject: [PATCH v2 1/9] mmc: dw_mmc: add runtime PM callback Date: Wed, 12 Oct 2016 10:50:35 +0800 Message-ID: <1476240643-5701-2-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 This patch add dw_mci_runtime_suspend/resume interfaces and expose it to dw_mci variant driver to support runtime PM. Signed-off-by: Shawn Lin --- Changes in v2: - use struct device as argument for runtime callback drivers/mmc/host/dw_mmc.c | 32 ++++++++++++++++++++++++++++++-- drivers/mmc/host/dw_mmc.h | 4 +++- 2 files changed, 33 insertions(+), 3 deletions(-) diff --git a/drivers/mmc/host/dw_mmc.c b/drivers/mmc/host/dw_mmc.c index 4fcbc40..67fa088 100644 --- a/drivers/mmc/host/dw_mmc.c +++ b/drivers/mmc/host/dw_mmc.c @@ -3266,7 +3266,7 @@ EXPORT_SYMBOL(dw_mci_remove); -#ifdef CONFIG_PM_SLEEP +#ifdef CONFIG_PM /* * TODO: we should probably disable the clock to the card in the suspend path. */ @@ -3324,7 +3324,35 @@ int dw_mci_resume(struct dw_mci *host) return 0; } EXPORT_SYMBOL(dw_mci_resume); -#endif /* CONFIG_PM_SLEEP */ + +int dw_mci_runtime_suspend(struct device *dev) +{ + int err = 0; + struct dw_mci *host = dev_get_drvdata(dev); + + err = dw_mci_suspend(host); + if (err) + return err; + + clk_disable_unprepare(host->ciu_clk); + + return err; +} +EXPORT_SYMBOL(dw_mci_runtime_suspend); + +int dw_mci_runtime_resume(struct device *dev) +{ + int ret = 0; + struct dw_mci *host = dev_get_drvdata(dev); + + ret = clk_prepare_enable(host->ciu_clk); + if (ret) + return ret; + + return dw_mci_resume(host); +} +EXPORT_SYMBOL(dw_mci_runtime_resume); +#endif /* CONFIG_PM */ static int __init dw_mci_init(void) { diff --git a/drivers/mmc/host/dw_mmc.h b/drivers/mmc/host/dw_mmc.h index e8cd2de..d14a391 100644 --- a/drivers/mmc/host/dw_mmc.h +++ b/drivers/mmc/host/dw_mmc.h @@ -234,9 +234,11 @@ extern int dw_mci_probe(struct dw_mci *host); extern void dw_mci_remove(struct dw_mci *host); -#ifdef CONFIG_PM_SLEEP +#ifdef CONFIG_PM extern int dw_mci_suspend(struct dw_mci *host); extern int dw_mci_resume(struct dw_mci *host); +extern int dw_mci_runtime_suspend(struct device *device); +extern int dw_mci_runtime_resume(struct device *device); #endif /** -- 2.3.7