[RFC] usb issue on imx27: 3 clocks are needed

[peter.chen@freescale.com (Peter Chen)]

On Sat, Aug 16, 2014 at 05:38:30PM +0200, Philippe Reynes wrote:
> Hi all,
> 
> i.MX27's usb needs three clocks (usb_ipg_gate, usb_ahb_gate and usb_div)
> but the current chipidea driver implementation, and devicetree, provides
> only ipg and ahb. Consequently, if the bootloader don't enable the last
> one, the kernel will crash.
> 
> Our approach/idea is to add a second, optionnal, clock in ci_hdrc_imx.c
> with 'per' name in devicetree  and to add  clock name 'main_clk' for mandatory clock.
> This approach it correct? Or an other approach seems better?
> Thank you very much for your point of view.
> 

It is ok for me to have ipg, ahb and per clocks at driver, but how can you maintain
DT consistent? Can you accept open ipg and per always on at clock.c?

-- 
Best Regards,
Peter Chen