Stephen Warren wrote at Thursday, December 22, 2011 2:02 PM:

On Tegra20, the UART clock runs at 216MHz, whereas on Tegra30 it runs at
408MHz. Modify arch_decomp_setup() to detect Tegra20-vs-Tegra30 at run-
time, and program the correct divisor.

This makes uncompressor messages work correctly on Tegra30. This also
fixes early printk, assuming zImage is used and this setup code runs.

I'll be posting a V2 for this patch soon; I'll rework it to use Tegra's
CHIPID register instead of a random GIC register, which should make the
code a little more future-proof.

-- 
nvpublic