[PATCH 2/4] clk: tegra: add EMC clock driver

[Lucas Stach]

Am Donnerstag, den 19.12.2013, 12:05 +0200 schrieb Peter De Schrijver:
[...]
> 
> > funny tricks like running from IRAM since we can't access SDRAM during
> > the clock change? If so, I'm not sure how having the EMC clock changing
> > code is going to help your case (2) anyway, since we'll presumably have
> > to code up a custom stub in assembly for the part of the code that runs
> > from IRAM...
> > 
> 
> There is no need for assembler or running from IRAM (at least from Tegra30
> onwards, I don't know about Tegra20).
> 
Tegra20 doesn't need any IRAM trickery, the sequence is just:
1. set up EMC shadow registers for new clock frequency
2. change EMC divider in CAR module

This was known working on Colibri T20 before the CCF change.

Regards,
Lucas