Add documentation for the binding of Window watchdog device. Signed-off-by: Srinivas Neeli <srinivas.neeli@xxxxxxxxxx> --- .../bindings/watchdog/xlnx,versal-wwdt.yaml | 71 +++++++++++++++++++ 1 file changed, 71 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..ca03ee9db9fa --- /dev/null +++ b/Documentation/devicetree/bindings/watchdog/xlnx,versal-wwdt.yaml @@ -0,0 +1,71 @@ +# 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 <sneeli@xxxxxxxxxx> + +description: + Versal watchdog driver uses Window watchdog mode. Window watchdog + timer(WWDT) contains closed(first) and open(second) window with + 32 bit width. WWDT will generate an interrupt after the first window + timeout and reset signal after the second window timeout. Timeout + and pretimeout configuration, Stop and Refresh trigger only in open + window. + +properties: + compatible: + enum: + - xlnx,versal-wwdt-1.0 + reg: + maxItems: 1 + + clocks: + maxItems: 1 + + timeout-sec: true + + pretimeout-sec: true + + interrupts: + items: + - description: Watchdog interrupt + - description: Watchdog reset pending interrupt + description: + Interrupt line names "wdt" or "wwdt_reset_pending". + wdt - will assert high after first (closed) window + timer expires. wwdt_reset_pending - will assert high + after second (open) window timer expires if WRP + (Watchdog Reset pending) is configured with third + (SST) timer. + + interrupt-names: + items: + - const: wdt + - const: wwdt_reset_pending + +required: + - compatible + - reg + - clocks + - interrupts + - interrupt-names + +additionalProperties: false + +examples: + - | + watchdog@fd4d0000 { + compatible = "xlnx,versal-wwdt-1.0"; + reg = <0xfd4d0000 0x10000>; + clocks = <&clock25>; + timeout-sec = <30>; + pretimeout-sec = <25>; + interrupts = <0 0x64 1>, <0 0x6D 1>; + interrupt-names = "wdt", "wwdt_reset_pending"; + }; +... -- 2.22.0
