[OpenWrt-Devel] [RFC] ramips: awake rt305x USB controller

[Сергей Василюгин]

Long story of rt305x USB controller feature [1] arise again in trunk [2].
I make quick fix but not sure that it's correct.
Possiblely it's time to reanimate device_reset() patch?

Signed-Off-By: Serge Vasilugin <vasilugin at yandex.ru>

[1] http://marc.info/?l=linux-usb&m=137398626102108&w=2
[2] https://dev.openwrt.org/ticket/21396
[3] https://dev.openwrt.org/changeset/42445

--- a/drivers/usb/dwc2/platform.c
+++ b/drivers/usb/dwc2/platform.c
@@ -375,6 +375,12 @@ static int dwc2_driver_probe(struct plat
 	dev_dbg(&dev->dev, "mapped PA %08lx to VA %p\n",
 		(unsigned long)res->start, hsotg->regs);
 
+	/* Enable USB port before any regs access */
+	if(dwc2_readl(hsotg->regs + PCGCTL) & 0x0f) {
+		dwc2_writel(0x00, hsotg->regs + PCGCTL);
+		/* TODO: mdelay(25) here? vendor driver don't use it */
+	}
+
 	hsotg->dr_mode = usb_get_dr_mode(&dev->dev);
 	if (IS_ENABLED(CONFIG_USB_DWC2_HOST) &&
 			hsotg->dr_mode != USB_DR_MODE_HOST) {


---
serge
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