diff options
| -rw-r--r-- | common/usb_hub.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/common/usb_hub.c b/common/usb_hub.c index 576e0e6..84d0d3f 100644 --- a/common/usb_hub.c +++ b/common/usb_hub.c @@ -109,6 +109,7 @@ static void usb_hub_power_on(struct usb_hub_device *hub) { int i; struct usb_device *dev; + unsigned pgood_delay = hub->desc.bPwrOn2PwrGood * 2; dev = hub->pusb_dev; /* Enable power to the ports */ @@ -116,8 +117,10 @@ static void usb_hub_power_on(struct usb_hub_device *hub) for (i = 0; i < dev->maxchild; i++) { usb_set_port_feature(dev, i + 1, USB_PORT_FEAT_POWER); USB_HUB_PRINTF("port %d returns %lX\n", i + 1, dev->status); - wait_ms(hub->desc.bPwrOn2PwrGood * 2); } + + /* Wait at least 100 msec for power to become stable */ + wait_ms(max(pgood_delay, (unsigned)100)); } void usb_hub_reset(void) |