T1024RDB usb controller doesn't detect usb device at first usb start Add a delay that is greater than 10808 us can fix that issue, which delay if is less than 10808 us, issue is probabilistic occurrence
=> usb start starting USB... USB0: USB EHCI 1.00 USB1: USB EHCI 1.00 scanning bus 0 for devices... 1 USB Device(s) found scanning bus 1 for devices... 1 USB Device(s) found scanning usb for storage devices... 0 Storage Device(s) found => usb stop stopping USB.. => usb start starting USB... USB0: USB EHCI 1.00 USB1: USB EHCI 1.00 scanning bus 0 for devices... 2 USB Device(s) found scanning bus 1 for devices... 1 USB Device(s) found scanning usb for storage devices... 1 Storage Device(s) found =>
Signed-off-by: Yinbo Zhu yinbo.zhu@nxp.com --- common/usb_hub.c | 3 +++ 1 file changed, 3 insertions(+)
diff --git a/common/usb_hub.c b/common/usb_hub.c index 33aaeb8e44..6dd06696b2 100644 --- a/common/usb_hub.c +++ b/common/usb_hub.c @@ -486,6 +486,9 @@ static int usb_scan_port(struct usb_device_scan *usb_scan) return 0; }
+#ifdef CONFIG_TARGET_T1024RDB + udelay(10808); +#endif if (portchange & USB_PORT_STAT_C_RESET) { debug("port %d reset change\n", i + 1); usb_clear_port_feature(dev, i + 1, USB_PORT_FEAT_C_RESET);