[PATCH v2 0/3] USB: add generic onboard USB HUB driver

Arnd Bergmann arnd at arndb.de
Mon Dec 14 01:35:19 PST 2015


On Monday 14 December 2015 15:26:11 Peter Chen wrote:
> Hi all,
> 
> There is a known issue that the USB code can't handle USB HUB's
> external pins well, in that case, it may cause some onboard
> USB HUBs can't work since their PHY's clock or reset pin needs to
> operate.
> 
> The user reported this issue at below:
> http://www.spinics.net/lists/linux-usb/msg131502.html
> 
> In this patch set, I add a generic onboard USB HUB driver to
> handle this problem, the external signals will be configured
> before usb controller's initialization, it much likes we did
> it at board code before.
> 
> The user needs to add this generic hub node at dts to support it.
> 
> @The udoo users, help to test please.

I still think need to do this properly by representing the hub
device as a USB device, using power sequencing code like MMC does.

	Arnd



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