Enabling runtime power management on dwc3-exynos
letting dwc3 controller to be autosuspended on exynos
platform when not in use.
Signed-off-by: Vivek Gautam <gautam.vivek@xxxxxxxxxxx>
---
drivers/usb/dwc3/dwc3-exynos.c | 13 +++++++++++++
1 files changed, 13 insertions(+), 0 deletions(-)
diff --git a/drivers/usb/dwc3/dwc3-exynos.c b/drivers/usb/dwc3/dwc3-exynos.c
index e6771d9..28b5f8a 100644
--- a/drivers/usb/dwc3/dwc3-exynos.c
+++ b/drivers/usb/dwc3/dwc3-exynos.c
@@ -19,6 +19,7 @@
#include <linux/platform_data/dwc3-exynos.h>
#include <linux/dma-mapping.h>
#include <linux/clk.h>
+#include <linux/pm_runtime.h>
#include <linux/usb/otg.h>
#include <linux/usb/nop-usb-xceiv.h>
#include <linux/of.h>
@@ -143,6 +144,10 @@ static int dwc3_exynos_probe(struct platform_device *pdev)
exynos->dev = dev;
exynos->clk = clk;
+ pm_runtime_enable(dev);
+ pm_runtime_get_sync(dev);
+ pm_runtime_forbid(dev);
+
clk_enable(exynos->clk);
ret = platform_device_add_resources(dwc3, pdev->resource,
@@ -158,10 +163,14 @@ static int dwc3_exynos_probe(struct platform_device *pdev)
goto err2;
}
+ pm_runtime_put_sync(dev);
+ pm_runtime_allow(dev);
+
return 0;
err2:
clk_disable(clk);
+ pm_runtime_disable(dev);
err1:
platform_device_put(dwc3);
@@ -172,6 +181,10 @@ static int dwc3_exynos_remove(struct platform_device *pdev)
{
struct dwc3_exynos *exynos = platform_get_drvdata(pdev);
+ if (!pm_runtime_suspended(&pdev->dev))
+ pm_runtime_put(&pdev->dev);
+ pm_runtime_disable(&pdev->dev);
+
platform_device_unregister(exynos->dwc3);
platform_device_unregister(exynos->usb2_phy);
platform_device_unregister(exynos->usb3_phy);
--
1.7.6.5
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