[PATCH] ARM: bcm2835: implement machine restart hook

[Stephen Warren]

On 09/27/2012 10:08 PM, Stephen Warren wrote:
> Implement the machine restart hook using the SoC's watchdog timer module.
> To support this, define a DT binding for the watchdog module, and add it
> to the device tree.
> 
> The downstream rpi-split branch contains a full watchdog timer driver
> implementation, which also implements the restart hook. However, the
> restart function is largely separate from the watchdog driver, so for
> simplicity, the restart hook is implemented here directly in the main
> machine source file.
> 
> Overall structure (separate setup/restart) functions derived from the
> picoxcell ARM support.
> 
> Watchdog register IO sequence taken from code by Simon Arlott. Note that
> the watchdog module is not documented in BCM2835-ARM-Peripherals.pdf.

Applied to rpi's for-3.8/soc branch.