[PATCH v5 1/3] dt-bindings: watchdog: Add watchdog for StarFive JH7100 and JH7110

[Guenter Roeck]

On Tue, Mar 14, 2023 at 09:24:35PM +0800, Xingyu Wu wrote:
> Add bindings to describe the watchdog for the StarFive JH7100/JH7110 SoC.
> And Use JH7100 as first StarFive SoC with watchdog.
> 
> Signed-off-by: Xingyu Wu <xingyu.wu at starfivetech.com>
> Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski at linaro.org>

Reviewed-by: Guenter Roeck <linux at roeck-us.net>

> ---
>  .../watchdog/starfive,jh7100-wdt.yaml         | 71 +++++++++++++++++++
>  1 file changed, 71 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/watchdog/starfive,jh7100-wdt.yaml
> 
> diff --git a/Documentation/devicetree/bindings/watchdog/starfive,jh7100-wdt.yaml b/Documentation/devicetree/bindings/watchdog/starfive,jh7100-wdt.yaml
> new file mode 100644
> index 000000000000..68f3f6fd08a6
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/watchdog/starfive,jh7100-wdt.yaml
> @@ -0,0 +1,71 @@
> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/watchdog/starfive,jh7100-wdt.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: StarFive Watchdog for JH7100 and JH7110 SoC
> +
> +maintainers:
> +  - Xingyu Wu <xingyu.wu at starfivetech.com>
> +  - Samin Guo <samin.guo at starfivetech.com>
> +
> +description:
> +  The JH7100 and JH7110 watchdog both are 32 bit counters. JH7100 watchdog
> +  has only one timeout phase and reboots. And JH7110 watchdog has two
> +  timeout phases. At the first phase, the signal of watchdog interrupt
> +  output(WDOGINT) will rise when counter is 0. The counter will reload
> +  the timeout value. And then, if counter decreases to 0 again and WDOGINT
> +  isn't cleared, the watchdog will reset the system unless the watchdog
> +  reset is disabled.
> +
> +allOf:
> +  - $ref: watchdog.yaml#
> +
> +properties:
> +  compatible:
> +    enum:
> +      - starfive,jh7100-wdt
> +      - starfive,jh7110-wdt
> +
> +  reg:
> +    maxItems: 1
> +
> +  interrupts:
> +    maxItems: 1
> +
> +  clocks:
> +    items:
> +      - description: APB clock
> +      - description: Core clock
> +
> +  clock-names:
> +    items:
> +      - const: apb
> +      - const: core
> +
> +  resets:
> +    items:
> +      - description: APB reset
> +      - description: Core reset
> +
> +required:
> +  - compatible
> +  - reg
> +  - clocks
> +  - clock-names
> +  - resets
> +
> +unevaluatedProperties: false
> +
> +examples:
> +  - |
> +    watchdog at 12480000 {
> +        compatible = "starfive,jh7100-wdt";
> +        reg = <0x12480000 0x10000>;
> +        clocks = <&clk 171>,
> +                 <&clk 172>;
> +        clock-names = "apb", "core";
> +        resets = <&rst 99>,
> +                 <&rst 100>;
> +    };