On 22:08 Thu 27 Sep , 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. > > Signed-off-by: Stephen Warren <[email protected]> > --- > .../bindings/watchdog/brcm,bcm2835-pm-wdog.txt | 13 ++++++ > arch/arm/boot/dts/bcm2835.dtsi | 5 +++ > arch/arm/mach-bcm2835/bcm2835.c | 46 > ++++++++++++++++++++ > 3 files changed, 64 insertions(+) > create mode 100644 > Documentation/devicetree/bindings/watchdog/brcm,bcm2835-pm-wdog.txt > > diff --git > a/Documentation/devicetree/bindings/watchdog/brcm,bcm2835-pm-wdog.txt > b/Documentation/devicetree/bindings/watchdog/brcm,bcm2835-pm-wdog.txt > new file mode 100644 > index 0000000..03138e6 > --- /dev/null > +++ b/Documentation/devicetree/bindings/watchdog/brcm,bcm2835-pm-wdog.txt > @@ -0,0 +1,13 @@ > +BCM2835 Watchdog timer > + > +Required properties: > + > +- compatible : should be "brcm,bcm2835-pm-wdog" > +- reg : Specifies base physical address and size of the registers. > + > +Example: > + > +intc: interrupt-controller { > + compatible = "brcm,bcm2835-pm-wdog"; it's seems everyone use -wdt
Best Regards, J. _______________________________________________ devicetree-discuss mailing list [email protected] https://lists.ozlabs.org/listinfo/devicetree-discuss
