Enabling runtime power management on dwc3-exynos to save
power and allow its PHY's power to be managed at runtime.
Signed-off-by: Vivek Gautam <gautam.vivek@xxxxxxxxxxx>
---
drivers/usb/dwc3/dwc3-exynos.c | 47 ++++++++++++++++++++++++++++++++++++++++
1 files changed, 47 insertions(+), 0 deletions(-)
diff --git a/drivers/usb/dwc3/dwc3-exynos.c b/drivers/usb/dwc3/dwc3-exynos.c
index aae5328..c51e8c1 100644
--- a/drivers/usb/dwc3/dwc3-exynos.c
+++ b/drivers/usb/dwc3/dwc3-exynos.c
@@ -157,11 +157,15 @@ static int dwc3_exynos_probe(struct platform_device *pdev)
goto err4;
}
+ pm_runtime_set_active(&pdev->dev);
+ pm_runtime_enable(&pdev->dev);
+
return 0;
err4:
clk_disable(clk);
clk_put(clk);
+ pm_runtime_disable(&pdev->dev);
err3:
platform_device_put(dwc3);
err1:
@@ -174,6 +178,8 @@ static int dwc3_exynos_remove(struct platform_device *pdev)
{
struct dwc3_exynos *exynos = platform_get_drvdata(pdev);
+ pm_runtime_disable(&pdev->dev);
+
platform_device_unregister(exynos->dwc3);
platform_device_unregister(exynos->usb2_phy);
platform_device_unregister(exynos->usb3_phy);
@@ -186,6 +192,46 @@ static int dwc3_exynos_remove(struct platform_device *pdev)
return 0;
}
+static int dwc3_exynos_runtime_suspend(struct device *dev)
+{
+ struct dwc3_exynos *exynos = dev_get_drvdata(dev);
+ struct platform_device *pdev_dwc = exynos->dwc3;
+ struct dwc3 *dwc = NULL;
+
+ dwc = platform_get_drvdata(pdev_dwc);
+
+ if (!dwc)
+ return 0;
+
+ pm_runtime_put_sync(dwc->usb3_phy->dev);
+
+ clk_disable(exynos->clk);
+
+ return 0;
+}
+static int dwc3_exynos_runtime_resume(struct device *dev)
+{
+ struct dwc3_exynos *exynos = dev_get_drvdata(dev);
+ struct platform_device *pdev_dwc = exynos->dwc3;
+ struct dwc3 *dwc = NULL;
+
+ dwc = platform_get_drvdata(pdev_dwc);
+
+ clk_enable(exynos->clk);
+
+ if (!dwc)
+ return 0;
+
+ pm_runtime_get_sync(dwc->usb3_phy->dev);
+
+ return 0;
+}
+
+static const struct dev_pm_ops dwc3_exynos_pm_ops = {
+ SET_RUNTIME_PM_OPS(dwc3_exynos_runtime_suspend,
+ dwc3_exynos_runtime_resume, NULL)
+};
+
#ifdef CONFIG_OF
static const struct of_device_id exynos_dwc3_match[] = {
{ .compatible = "samsung,exynos-dwc3" },
@@ -200,6 +246,7 @@ static struct platform_driver dwc3_exynos_driver = {
.driver = {
.name = "exynos-dwc3",
.of_match_table = of_match_ptr(exynos_dwc3_match),
+ .pm = &dwc3_exynos_pm_ops,
},
};
--
1.7.6.5
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