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| author | Steffen Trumtrar <s.trumtrar@pengutronix.de> | 2012-08-30 14:30:50 +0200 |
|---|---|---|
| committer | Sascha Hauer <s.hauer@pengutronix.de> | 2012-08-31 09:28:44 +0200 |
| commit | 7212fa7d4273155aaa0de99ecd4cd040396acb19 (patch) | |
| tree | a7ee8aac8b74051b3351666d02a889a1f00433ad /drivers/usb/core/usb.c | |
| parent | 738c57eeaa7958aae6600f6f668fbda8a5128cd4 (diff) | |
| download | barebox-7212fa7d4273155aaa0de99ecd4cd040396acb19.tar.gz barebox-7212fa7d4273155aaa0de99ecd4cd040396acb19.tar.xz | |
usb: use ep-specific pwrgood delay
In usb_hub_configure the hub is asked for its descriptor and among other things
its bPwrOn2PwrGood time. In the actual hub_power_on function this information
was not used and a hardcoded value was used instead. For some hubs this delay
is to short. So, use the delay the hub wants.
Signed-off-by: Steffen Trumtrar <s.trumtrar@pengutronix.de>
Signed-off-by: Michael Grzeschik <m.grzeschik@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Diffstat (limited to 'drivers/usb/core/usb.c')
| -rw-r--r-- | drivers/usb/core/usb.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/usb/core/usb.c b/drivers/usb/core/usb.c index a5075d5436..b4530f1bc5 100644 --- a/drivers/usb/core/usb.c +++ b/drivers/usb/core/usb.c @@ -948,7 +948,8 @@ static void usb_hub_power_on(struct usb_hub_device *hub) usb_set_port_feature(dev, i + 1, USB_PORT_FEAT_POWER); USB_HUB_PRINTF("port %d returns %lX\n", i + 1, dev->status); } - mdelay(20); + /* power on is encoded in 2ms increments -> times 2 for the actual delay */ + mdelay(hub->desc.bPwrOn2PwrGood*2); } #define MAX_TRIES 5 |