[PATCH V2] arm/tegra: Support Tegra30 in decompressor UART setup

[Olof Johansson]

On Tue, Jan 03, 2012 at 03:05:47PM -0700, Stephen Warren wrote:
> 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.
> 
> v2: Use CHIPID register to differentiate between chips, rather than a
> GIC register. This should be more future-proof. Volatile is required
> to prevent the compiler transforming the 32-bit apb_misc register read
> into an 8-bit read of address 1 higher, since the HW only supports 32-
> bit accesses, and will hang on an 8-bit access.
> 
> Signed-off-by: Stephen Warren <swarren at nvidia.com>

Thanks, applied.


-Olof