From: Serge Vasilugin <vasilugin@xxxxxxxxx> The Ralink uboot sets the USB controller into sleep mode. This patch checks this condition and awakes controller before any register access. Signed-off-by: Serge Vasilugin <vasilugin@xxxxxxxxx> Signed-off-by: John Crispin <john@xxxxxxxxxxx> --- Hi, we have been carrying this patch inside OpenWrt for half a decade. The USB driver that is included in the Ralink SDK does a mdelay(25) after this call but it works without apparently. John drivers/usb/dwc2/platform.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/drivers/usb/dwc2/platform.c b/drivers/usb/dwc2/platform.c index 4c0819554bcd..0bc9fd65e29e 100644 --- a/drivers/usb/dwc2/platform.c +++ b/drivers/usb/dwc2/platform.c @@ -419,6 +419,10 @@ static int dwc2_driver_probe(struct platform_device *dev) if (retval) return retval; + /* Enable USB port before any regs access */ + if (dwc2_readl(hsotg->regs + PCGCTL) & 0x0f) + dwc2_writel(0x00, hsotg->regs + PCGCTL); + retval = dwc2_get_dr_mode(hsotg); if (retval) goto error; -- 2.11.0 -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
