From: Serge Vasilugin <vasilu...@yandex.ru>
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 <vasilu...@yandex.ru>
Signed-off-by: John Crispin <j...@phrozen.org>
---
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 majord...@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
