On Thu, 14 Jul 2011 10:30:11 +0200 Stefano Babic sbabic@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@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,