Re: [PATCH] [POWERPC] mpc8315: fix USB UTMI Host setup

[Kumar Gala <galak@kernel.crashing.org>]

On Apr 9, 2008, at 8:59 AM, Anton Vorontsov wrote:
> Currently USB Host isn't functional on the MPC8315E boards, for two
> reasons as described below.
>
> MPC8315 Reference Manual says:
> "The USB DR unit must have the same clock ratio as the encryption core
> unit, unless one of them has its clock disabled."
>
> The encryption core also drives I2C clock, so it is enabled and is  
> equal
> to 01. That means USBDRCM should be 01 here.
>
> Plus, according to MPC8315E-RDB schematics, USB unit consumes CLK_IN
> clock from the 24.00MHz oscillator, which means we must adjust REFSEL
> bits as well.
>
> p.s.
> Idially we should rework whole 83xx/usb.c code, in two steps:
> 1. Move SCCR code to the U-Boot;
> 2. Implement fsl,usb-clock property in the device tree, so usb.c could
>   decide what clock exactly to use on per-board basis.
>
> Though, today we're not in a hurry since there is just one 8315e board
> out there.
>
> Cc: Kumar Gala <galak@kernel.crashing.org>
> Cc: Kim Phillips <kim.phillips@freescale.com>
> Signed-off-by: Anton Vorontsov <avorontsov@ru.mvista.com>
> ---

applied.