Some Renesas SoCs do not have a reset register and the only way to do a SW controlled reset is to use the watchdog timer.
Additionally, since all the WDT timeout options are so quick, a system reset is about the only thing it's good for. For example, the longest WDT overflow you can get with a RZ/A1 (R7S72100) with its 8-bit wide counter is 125ms. Chris Brandt (3): power: reset: Add Renesas reset driver dt-bindings: power: reset: add document for renesas-reset driver ARM: dts: r7s72100: Add reset handler .../bindings/power/reset/renesas-reset.txt | 15 +++ arch/arm/boot/dts/r7s72100.dtsi | 5 + drivers/power/reset/Kconfig | 9 ++ drivers/power/reset/Makefile | 1 + drivers/power/reset/renesas-reset.c | 103 +++++++++++++++++++++ 5 files changed, 133 insertions(+) create mode 100644 Documentation/devicetree/bindings/power/reset/renesas-reset.txt create mode 100644 drivers/power/reset/renesas-reset.c -- 2.10.1
