usb: dwc3: omap: add basic suspend/resume support
this patch implements basic suspend/resume
functionality for the OMAP glue layer.
Tested-by: Vivek Gautam <gautam.vivek@samsung.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
diff --git a/drivers/usb/dwc3/dwc3-omap.c b/drivers/usb/dwc3/dwc3-omap.c
index ed178c0..35b9673 100644
--- a/drivers/usb/dwc3/dwc3-omap.c
+++ b/drivers/usb/dwc3/dwc3-omap.c
@@ -121,6 +121,8 @@
int irq;
void __iomem *base;
+ u32 utmi_otg_status;
+
u32 dma_status:1;
};
@@ -402,12 +404,66 @@
};
MODULE_DEVICE_TABLE(of, of_dwc3_match);
+#ifdef CONFIG_PM
+static int dwc3_omap_prepare(struct device *dev)
+{
+ struct dwc3_omap *omap = dev_get_drvdata(dev);
+
+ dwc3_omap_disable_irqs(omap);
+
+ return 0;
+}
+
+static void dwc3_omap_complete(struct device *dev)
+{
+ struct dwc3_omap *omap = dev_get_drvdata(dev);
+
+ dwc3_omap_enable_irqs(omap);
+}
+
+static int dwc3_omap_suspend(struct device *dev)
+{
+ struct dwc3_omap *omap = dev_get_drvdata(dev);
+
+ omap->utmi_otg_status = dwc3_omap_readl(omap->base,
+ USBOTGSS_UTMI_OTG_STATUS);
+
+ return 0;
+}
+
+static int dwc3_omap_resume(struct device *dev)
+{
+ struct dwc3_omap *omap = dev_get_drvdata(dev);
+
+ dwc3_omap_writel(omap->base, USBOTGSS_UTMI_OTG_STATUS,
+ omap->utmi_otg_status);
+
+ pm_runtime_disable(dev);
+ pm_runtime_set_active(dev);
+ pm_runtime_enable(dev);
+
+ return 0;
+}
+
+static const struct dev_pm_ops dwc3_omap_dev_pm_ops = {
+ .prepare = dwc3_omap_prepare,
+ .complete = dwc3_omap_complete,
+
+ SET_SYSTEM_SLEEP_PM_OPS(dwc3_omap_suspend, dwc3_omap_resume)
+};
+
+#define DEV_PM_OPS (&dwc3_omap_dev_pm_ops)
+#else
+#define DEV_PM_OPS NULL
+#endif /* CONFIG_PM */
+
static struct platform_driver dwc3_omap_driver = {
.probe = dwc3_omap_probe,
.remove = dwc3_omap_remove,
.driver = {
.name = "omap-dwc3",
.of_match_table = of_dwc3_match,
+ .pm = DEV_PM_OPS,
},
};