On Thu, Apr 20, 2023 at 04:12:29PM +0530, Srinivas Neeli wrote: > Versal watchdog IP uses window watchdog mode. Window watchdog > timer(WWDT) contains closed(first) and open(second) window with > 32 bit width. Write to the watchdog timer within predefined window > periods of time. This means a period that is not too soon and > a period that is not too late. > > Add devicetree bindings for versal window watchdog device. > > Signed-off-by: Srinivas Neeli <srinivas.neeli@xxxxxxx> Reviewed-by: Guenter Roeck <linux@xxxxxxxxxxxx> > --- > Changes in V4: > - Updated commit subject(removed redundant "bindings"). > - Updated commit descriptioni(removed "this patch"). > - Updated watchdog.yaml reference to local. > Changes in V3: > - Removed xlnx,close_percent property. > Changes in V2: > - Added watchdog ref > - Removed timeout-sec property > - Used 4 spaces for example indentation. > --- > .../bindings/watchdog/xlnx,versal-wwdt.yaml | 50 +++++++++++++++++++ > 1 file changed, 50 insertions(+) > create mode 100644 Documentation/devicetree/bindings/watchdog/xlnx,versal-wwdt.yaml > > diff --git a/Documentation/devicetree/bindings/watchdog/xlnx,versal-wwdt.yaml b/Documentation/devicetree/bindings/watchdog/xlnx,versal-wwdt.yaml > new file mode 100644 > index 000000000000..14b069599740 > --- /dev/null > +++ b/Documentation/devicetree/bindings/watchdog/xlnx,versal-wwdt.yaml > @@ -0,0 +1,50 @@ > +# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause) > +%YAML 1.2 > +--- > +$id: http://devicetree.org/schemas/watchdog/xlnx,versal-wwdt.yaml# > +$schema: http://devicetree.org/meta-schemas/core.yaml# > + > +title: Xilinx Versal window watchdog timer controller > + > +maintainers: > + - Neeli Srinivas <srinivas.neeli@xxxxxxx> > + > +description: > + Versal watchdog intellectual property uses window watchdog mode. > + Window watchdog timer(WWDT) contains closed(first) and open(second) > + window with 32 bit width. Write to the watchdog timer within > + predefined window periods of time. This means a period that is not > + too soon and a period that is not too late. The WWDT has to be > + restarted within the open window time. If software tries to restart > + WWDT outside of the open window time period, it generates a reset. > + > +allOf: > + - $ref: watchdog.yaml# > + > +properties: > + compatible: > + enum: > + - xlnx,versal-wwdt > + > + reg: > + maxItems: 1 > + > + clocks: > + maxItems: 1 > + > +required: > + - compatible > + - reg > + - clocks > + > +unevaluatedProperties: false > + > +examples: > + - | > + watchdog@fd4d0000 { > + compatible = "xlnx,versal-wwdt"; > + reg = <0xfd4d0000 0x10000>; > + clocks = <&clock25>; > + timeout-sec = <30>; > + }; > +... > -- > 2.25.1 >
