[U-Boot] [PATCH] ARM: tegra: TrimSlice: add support for USB1 port

[Stephen Warren <swarren@wwwdotorg.org>]

On 11/01/2012 05:17 PM, Lucas Stach wrote:
> Hi Stephen,
> 
> Am Donnerstag, den 01.11.2012, 16:14 -0600 schrieb Stephen Warren:
>> From: Stephen Warren <swarren@nvidia.com>
>>
>> TrimSlice's USB1 port has two purposes; it either acts as a device port
>> hosting Tegra's USB recovery protocol, or acts as a host port connected
>> to the internal USB->SATA bridge chip, which may in turn be connected to
>> an SSD or HDD. Add the appropriate device tree and board configuration
>> options to enable this port as a host port, and route the port to the
>> SATA bridge using the VBUS GPIO.
>>
> Hm, I don't really like to abuse the VBUS GPIO for this function. As the
> GPIO controlled routing is more a sort of pinmux can't you just add the
> GPIO enable to pin_mux_usb()?

I don't know, I think it's fine. It's certainly this way in the kernel.
And for all I know, this GPIO does actually affect VBUS as well as
flipping any mux (and the more I think about that, the more likely it
is) although I can't actually know for sure since I don't have the
schematics.