The root clock will be disabled in runtime pm which can be used to save power.
Signed-off-by: Dong Aisheng <b29396@xxxxxxxxxxxxx>
---
drivers/mmc/host/sdhci-esdhc-imx.c | 49 +++++++++++++++++++++++++++++++++++-
1 files changed, 48 insertions(+), 1 deletions(-)
diff --git a/drivers/mmc/host/sdhci-esdhc-imx.c b/drivers/mmc/host/sdhci-esdhc-imx.c
index da8026b..6e64981 100644
--- a/drivers/mmc/host/sdhci-esdhc-imx.c
+++ b/drivers/mmc/host/sdhci-esdhc-imx.c
@@ -27,6 +27,7 @@
#include <linux/of_gpio.h>
#include <linux/pinctrl/consumer.h>
#include <linux/platform_data/mmc-esdhc-imx.h>
+#include <linux/pm_runtime.h>
#include "sdhci-pltfm.h"
#include "sdhci-esdhc.h"
@@ -1121,6 +1122,12 @@ static int sdhci_esdhc_imx_probe(struct platform_device *pdev)
if (err)
goto disable_clk;
+ pm_runtime_set_active(&pdev->dev);
+ pm_runtime_enable(&pdev->dev);
+ pm_runtime_set_autosuspend_delay(&pdev->dev, 50);
+ pm_runtime_use_autosuspend(&pdev->dev);
+ pm_suspend_ignore_children(&pdev->dev, 1);
+
return 0;
disable_clk:
@@ -1141,6 +1148,9 @@ static int sdhci_esdhc_imx_remove(struct platform_device *pdev)
sdhci_remove_host(host, dead);
+ pm_runtime_dont_use_autosuspend(&pdev->dev);
+ pm_runtime_disable(&pdev->dev);
+
clk_disable_unprepare(imx_data->clk_per);
clk_disable_unprepare(imx_data->clk_ipg);
clk_disable_unprepare(imx_data->clk_ahb);
@@ -1150,12 +1160,49 @@ static int sdhci_esdhc_imx_remove(struct platform_device *pdev)
return 0;
}
+#ifdef CONFIG_PM_RUNTIME
+static int sdhci_esdhc_runtime_suspend(struct device *dev)
+{
+ struct sdhci_host *host = dev_get_drvdata(dev);
+ struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
+ struct pltfm_imx_data *imx_data = pltfm_host->priv;
+ int ret;
+
+ ret = sdhci_runtime_suspend_host(host);
+
+ clk_disable_unprepare(imx_data->clk_per);
+ clk_disable_unprepare(imx_data->clk_ipg);
+ clk_disable_unprepare(imx_data->clk_ahb);
+
+ return ret;
+}
+
+static int sdhci_esdhc_runtime_resume(struct device *dev)
+{
+ struct sdhci_host *host = dev_get_drvdata(dev);
+ struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
+ struct pltfm_imx_data *imx_data = pltfm_host->priv;
+
+ clk_prepare_enable(imx_data->clk_per);
+ clk_prepare_enable(imx_data->clk_ipg);
+ clk_prepare_enable(imx_data->clk_ahb);
+
+ return sdhci_runtime_resume_host(host);
+}
+#endif
+
+static const struct dev_pm_ops sdhci_esdhc_pmops = {
+ SET_SYSTEM_SLEEP_PM_OPS(sdhci_pltfm_suspend, sdhci_pltfm_resume)
+ SET_RUNTIME_PM_OPS(sdhci_esdhc_runtime_suspend,
+ sdhci_esdhc_runtime_resume, NULL)
+};
+
static struct platform_driver sdhci_esdhc_imx_driver = {
.driver = {
.name = "sdhci-esdhc-imx",
.owner = THIS_MODULE,
.of_match_table = imx_esdhc_dt_ids,
- .pm = SDHCI_PLTFM_PMOPS,
+ .pm = &sdhci_esdhc_pmops,
},
.id_table = imx_esdhc_devtype,
.probe = sdhci_esdhc_imx_probe,
--
1.7.2.rc3
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