[PATCH 00/13] Device tree support for OMAP HS USB Host

Roger Quadros rogerq at ti.com
Tue Feb 5 06:32:19 EST 2013

On 02/05/2013 01:25 PM, Rajendra Nayak wrote:
> On Monday 04 February 2013 09:28 PM, Roger Quadros wrote:
>> This patchset adds device tree support for OMAP's High Speed USB Host
>> subsystem. Board adaptation for Panda and Beagleboard is also provided.
>> Tested on Beagleboard.
>> Will only work with Panda if we provide a reference to the PHY clock
> But there is no reference provided even for Beagle. Does it work because
> the default clk speed is 192Mhz?

On beagle board the PHY is connected differently, i.e. as the clock receptor.
The PHY clock comes directly from the USB_CLK pin.

On Panda the PHY is the clock provider to the USB_CLK pin. For that it needs
a reference clock at the REFCLK pin which comes from FREF_CLK3.

>> generator in the device tree in PATCH 11. I do not know how to do that
>> as there is no way to provide a phandle to any of the OMAP generated clocks
>> in the device tree. Suggestions welcome:).


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