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| author | Vivek Gautam <gautam.vivek@samsung.com> | 2013-04-24 02:50:11 +0000 |
|---|---|---|
| committer | Marek Vasut <marex@denx.de> | 2013-05-06 02:16:36 +0200 |
| commit | 0bf796f7ae22086f0504f3297e9fb4e96aa04161 (patch) | |
| tree | da2687cedbb27541feddf631b54ab3f1951614eb /drivers/usb/host | |
| parent | 158947d276c96a49e0a99a97a61605be1bb5eb7a (diff) | |
| download | u-boot-imx-0bf796f7ae22086f0504f3297e9fb4e96aa04161.zip u-boot-imx-0bf796f7ae22086f0504f3297e9fb4e96aa04161.tar.gz u-boot-imx-0bf796f7ae22086f0504f3297e9fb4e96aa04161.tar.bz2 | |
usb: hub: Parallelize power-cycling of root-hub ports
Untill now we power-cycle (aka: disable power on a port
and re-enabling again) one port at a time.
Delay of 20ms for Port-power to change multiplies with
number of ports in this case.
So better we parallelize this process:
disable power on all ports, wait for port-power to stabilize
and then re-enable the power subsequently.
Signed-off-by: Vivek Gautam <gautam.vivek@samsung.com>
Diffstat (limited to 'drivers/usb/host')
0 files changed, 0 insertions, 0 deletions