[PATCH v2 1/2] dt-bindings: watchdog: Add Apple Watchdog

[Guenter Roeck]

On Tue, Nov 30, 2021 at 05:18:08PM +0100, Sven Peter wrote:
> Apple SoCs come with a simple embedded watchdog. This watchdog is also
> required in order to reset the SoC.
> 
> Reviewed-by: Mark Kettenis <kettenis at openbsd.org>
> Reviewed-by: Rob Herring <robh at kernel.org>
> Signed-off-by: Sven Peter <sven at svenpeter.dev>

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

> ---
> v1 --> v2:
>   - add Mark's and Rob's r-b tags
> 
>  .../bindings/watchdog/apple,wdt.yaml          | 52 +++++++++++++++++++
>  MAINTAINERS                                   |  1 +
>  2 files changed, 53 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/watchdog/apple,wdt.yaml
> 
> diff --git a/Documentation/devicetree/bindings/watchdog/apple,wdt.yaml b/Documentation/devicetree/bindings/watchdog/apple,wdt.yaml
> new file mode 100644
> index 000000000000..e58c56a6fdf6
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/watchdog/apple,wdt.yaml
> @@ -0,0 +1,52 @@
> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/watchdog/apple,wdt.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Apple SoC Watchdog
> +
> +allOf:
> +  - $ref: "watchdog.yaml#"
> +
> +maintainers:
> +  - Sven Peter <sven at svenpeter.dev>
> +
> +properties:
> +  compatible:
> +    items:
> +      - enum:
> +          - apple,t8103-wdt
> +          - apple,t6000-wdt
> +      - const: apple,wdt
> +
> +  reg:
> +    maxItems: 1
> +
> +  clocks:
> +    maxItems: 1
> +
> +  interrupts:
> +    maxItems: 1
> +
> +required:
> +  - compatible
> +  - reg
> +  - clocks
> +  - interrupts
> +
> +unevaluatedProperties: false
> +
> +examples:
> +  - |
> +    #include <dt-bindings/interrupt-controller/apple-aic.h>
> +    #include <dt-bindings/interrupt-controller/irq.h>
> +
> +    wdt: watchdog at 50000000 {
> +        compatible = "apple,t8103-wdt", "apple,wdt";
> +        reg = <0x50000000 0x4000>;
> +        clocks = <&clk>;
> +        interrupts = <AIC_IRQ 123 IRQ_TYPE_LEVEL_HIGH>;
> +    };
> +
> +...
> diff --git a/MAINTAINERS b/MAINTAINERS
> index 360e9aa0205d..859201bbd4e8 100644
> --- a/MAINTAINERS
> +++ b/MAINTAINERS
> @@ -1750,6 +1750,7 @@ F:	Documentation/devicetree/bindings/interrupt-controller/apple,aic.yaml
>  F:	Documentation/devicetree/bindings/mailbox/apple,mailbox.yaml
>  F:	Documentation/devicetree/bindings/pci/apple,pcie.yaml
>  F:	Documentation/devicetree/bindings/pinctrl/apple,pinctrl.yaml
> +F:	Documentation/devicetree/bindings/watchdog/apple,wdt.yaml
>  F:	arch/arm64/boot/dts/apple/
>  F:	drivers/i2c/busses/i2c-pasemi-core.c
>  F:	drivers/i2c/busses/i2c-pasemi-platform.c
> -- 
> 2.25.1
>