[U-Boot] ARM: omap3: Implement dpll5 (HSUSB clk) workaround for OMAP36xx/AM/DM37xx according to errata sprz318e.

[Tom Rini]

On Tue, Jul 09, 2013 at 09:43:17AM +0200, Naumann Andreas wrote:

> In chapter 'Advisory 2.1 USB Host Clock Drift Causes USB Spec
> Non-compliance in Certain Configurations' of the TI Errata it is
> recommended to use certain div/mult values for the DPLL5 clock setup.
> So far u-boot used the old 34xx values, so I added the errata
> recommended values specificly for 36xx init only.  Also, the FSEL
> registers exist no longer, so removed them from init.
> 
> Tested this on a AM3703 board with 19.2MHz oscillator, which
> previously couldnt lock the dpll5 (kernel complained). As a
> consequence the EHCI USB port wasnt usable in U-Boot and kernel. With
> this patch, kernel panics disappear and USB working fine in u-boot and
> kernel.
> 
> Signed-off-by: Andreas Naumann <anaumann at ultratronik.de>

Applied to u-boot-ti/master with a prototype added to
<asm/arch-omap3/clock.h> to avoid a warning.

-- 
Tom
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