[U-Boot] [PATCH] ARM: MX51: PLL errata workaround

[David Jander]

On Thu, 14 Jul 2011 10:30:11 +0200
Stefano Babic <sbabic at denx.de> wrote:

> On 07/14/2011 09:11 AM, David Jander wrote:
> > This is a port of the official PLL errata workaround from Freescale to
> > mainline u-boot.
> > The PLL's in the i.MX51 processor can go out of lock due to a metastable
> > condition in an analog flip-flop when used at high frequencies.
> > This workaround implements an undocumented feature in the PLL (dither
> > mode), which causes the effect of this failure to be much lower (in terms
> > of frequency deviation), avoiding system failure, or at least decreasing
> > the likelihood of system failure.
> > 
> > Signed-off-by: David Jander <david at protonic.nl>
> 
> Hi David,
> 
> do you have now also an official Errata number from Freescale to be
> added to your documentation ?

Needless to say that this supersedes my patch sent back in May, 26th... which
btw did not help much, since _all_ PLL's are affected by this problem. Not
only PLL1.

Best regards,

-- 
David Jander
Protonic Holland.