linux-kernel - Re: [PATCH 1/2] dt-bindings: watchdog: Convert Samsung SoC watchdog bindings to json-schema

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Message-ID: <20190912170145.GA17889@bogus>
Date:   Fri, 13 Sep 2019 15:36:15 +0100
From:   Rob Herring <robh@...nel.org>
To:     Krzysztof Kozlowski <krzk@...nel.org>
Cc:     Wim Van Sebroeck <wim@...ux-watchdog.org>,
        Guenter Roeck <linux@...ck-us.net>,
        Mark Rutland <mark.rutland@....com>,
        linux-watchdog@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/2] dt-bindings: watchdog: Convert Samsung SoC watchdog
 bindings to json-schema

On Sat, Sep 07, 2019 at 04:45:40PM +0200, Krzysztof Kozlowski wrote:
> Convert Samsung S3C/S5P/Exynos watchdog bindings to DT schema format
> using json-schema.
> 
> Signed-off-by: Krzysztof Kozlowski <krzk@...nel.org>
> ---
>  .../bindings/watchdog/samsung-wdt.txt         | 35 ----------
>  .../bindings/watchdog/samsung-wdt.yaml        | 69 +++++++++++++++++++
>  2 files changed, 69 insertions(+), 35 deletions(-)
>  delete mode 100644 Documentation/devicetree/bindings/watchdog/samsung-wdt.txt
>  create mode 100644 Documentation/devicetree/bindings/watchdog/samsung-wdt.yaml


> diff --git a/Documentation/devicetree/bindings/watchdog/samsung-wdt.yaml b/Documentation/devicetree/bindings/watchdog/samsung-wdt.yaml
> new file mode 100644
> index 000000000000..39f1ca3bc4db
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/watchdog/samsung-wdt.yaml
> @@ -0,0 +1,69 @@
> +# SPDX-License-Identifier: GPL-2.0
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/watchdog/samsung-wdt.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Samsung SoC Watchdog Timer Controller
> +
> +maintainers:
> +  - Krzysztof Kozlowski <krzk@...nel.org>
> +
> +description: |+
> +  The Samsung's Watchdog controller is used for resuming system operation
> +  after a preset amount of time during which the WDT reset event has not
> +  occurred.
> +
> +properties:
> +  compatible:
> +    enum:
> +      - samsung,s3c2410-wdt                   # for S3C2410
> +      - samsung,s3c6410-wdt                   # for S3C6410, S5PV210 and Exynos4
> +      - samsung,exynos5250-wdt                # for Exynos5250
> +      - samsung,exynos5420-wdt                # for Exynos5420
> +      - samsung,exynos7-wdt                   # for Exynos7
> +
> +  reg:
> +    maxItems: 1
> +
> +  interrupts:
> +    maxItems: 1
> +
> +  samsung,syscon-phandle:
> +    $ref: '/schemas/types.yaml#/definitions/phandle'
> +    description:
> +      Phandle to the PMU system controller node (in case of Exynos5250
> +      and Exynos5420).
> +
> +  timeout-sec:
> +    $ref: /schemas/types.yaml#/definitions/uint32
> +    description:
> +      Watchdog timeout in seconds.

We need a common schema for this and the node name.

Also note that anything with a unit suffix already has a type 
definition, so we don't really need to define it again.

> +
> +required:
> +  - compatible
> +  - interrupts
> +  - reg
> +
> +allOf:
> +  - if:
> +      properties:
> +        compatible:
> +          contains:
> +            enum:
> +              - samsung,exynos5250-wdt
> +              - samsung,exynos5420-wdt
> +    then:
> +      required:
> +        - samsung,syscon-phandle
> +
> +examples:
> +  - |
> +    watchdog@...d0000 {
> +      compatible = "samsung,exynos5250-wdt";
> +      reg = <0x101D0000 0x100>;
> +      interrupts = <0 42 0>;
> +      clocks = <&clock 336>;
> +      clock-names = "watchdog";
> +      samsung,syscon-phandle = <&pmu_syscon>;
> +    };
> -- 
> 2.17.1
>