Right now it doesn't handle full runtime suspend/resume
functionality. However it allows to handle PHYs' sleep
and wakeup across runtime suspend/resume.
Signed-off-by: Vivek Gautam <gautam.vivek@xxxxxxxxxxx>
---
drivers/usb/dwc3/core.c | 43 +++++++++++++++++++++++++++++++++++++++++++
1 files changed, 43 insertions(+), 0 deletions(-)
diff --git a/drivers/usb/dwc3/core.c b/drivers/usb/dwc3/core.c
index e250828..65a3adf 100644
--- a/drivers/usb/dwc3/core.c
+++ b/drivers/usb/dwc3/core.c
@@ -745,11 +745,54 @@ static int dwc3_resume(struct device *dev)
return 0;
}
+#ifdef CONFIG_PM_RUNTIME
+static int dwc3_runtime_suspend(struct device *dev)
+{
+ struct dwc3 *dwc = dev_get_drvdata(dev);
+ int ret = 0;
+
+ ret = usb_phy_autopm_put_sync(dwc->usb2_phy);
+ if (ret)
+ dev_warn(dev, "Can't autosuspend usb2-phy\n");
+
+ ret = usb_phy_autopm_put_sync(dwc->usb3_phy);
+ if (ret)
+ dev_warn(dev, "Can't autosuspend usb3-phy\n");
+
+ return ret;
+}
+
+static int dwc3_runtime_resume(struct device *dev)
+{
+ struct dwc3 *dwc = dev_get_drvdata(dev);
+ int ret = 0;
+
+ ret = usb_phy_autopm_get_sync(dwc->usb2_phy);
+ if (ret) {
+ dev_err(dev, "usb2-phy: get sync failed with err %d\n", ret);
+ return ret;
+ }
+
+ ret = usb_phy_autopm_get_sync(dwc->usb3_phy);
+ if (ret) {
+ dev_err(dev, "usb3-phy: get sync failed with err %d\n", ret);
+ return ret;
+ }
+
+ return ret;
+}
+#else
+#define dwc3_runtime_suspend NULL
+#define dwc3_runtime_resume NULL
+#endif
+
static const struct dev_pm_ops dwc3_dev_pm_ops = {
.prepare = dwc3_prepare,
.complete = dwc3_complete,
SET_SYSTEM_SLEEP_PM_OPS(dwc3_suspend, dwc3_resume)
+ SET_RUNTIME_PM_OPS(dwc3_runtime_suspend,
+ dwc3_runtime_resume, NULL)
};
#define DWC3_PM_OPS &(dwc3_dev_pm_ops)
--
1.7.6.5
--
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