linux-kernel - Re: [PATCH v3 1/7] dt-bindings: watchdog: Convert DW WDT binding to DT schema

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Date:   Fri, 29 May 2020 15:53:13 -0700
From:   Guenter Roeck <linux@...ck-us.net>
To:     Serge Semin <Sergey.Semin@...kalelectronics.ru>
Cc:     Wim Van Sebroeck <wim@...ux-watchdog.org>,
        Rob Herring <robh+dt@...nel.org>,
        Serge Semin <fancer.lancer@...il.com>,
        Rob Herring <robh@...nel.org>,
        Alexey Malahov <Alexey.Malahov@...kalelectronics.ru>,
        Thomas Bogendoerfer <tsbogend@...ha.franken.de>,
        Arnd Bergmann <arnd@...db.de>, linux-mips@...r.kernel.org,
        linux-watchdog@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v3 1/7] dt-bindings: watchdog: Convert DW WDT binding to
 DT schema

On Tue, May 26, 2020 at 06:41:17PM +0300, Serge Semin wrote:
> Modern device tree bindings are supposed to be created as YAML-files
> in accordance with dt-schema. This commit replaces the DW Watchdog
> legacy bare text bindings with YAML file. As before the binding states
> that the corresponding dts node is supposed to have a registers
> range, a watchdog timer references clock source, optional reset line and
> pre-timeout interrupt.
> 
> Signed-off-by: Serge Semin <Sergey.Semin@...kalelectronics.ru>
> Reviewed-by: Rob Herring <robh@...nel.org>
> Cc: Alexey Malahov <Alexey.Malahov@...kalelectronics.ru>
> Cc: Thomas Bogendoerfer <tsbogend@...ha.franken.de>
> Cc: Arnd Bergmann <arnd@...db.de>
> Cc: linux-mips@...r.kernel.org

Reviewed-by: Guenter Roeck <linux@...ck-us.net>

> ---
> 
> Changelog v2:
> - Rearrange SoBs.
> - Discard BE copyright header.
> - Replace "additionalProperties: false" with "unevaluatedProperties: false"
>   property.
> - Discard interrupts property from the required properties list.
> - Remove a label definition from the binding example.
> - Move the asynchronous APB3 clock support into a dedicated patch.
> ---
>  .../devicetree/bindings/watchdog/dw_wdt.txt   | 24 ---------
>  .../bindings/watchdog/snps,dw-wdt.yaml        | 50 +++++++++++++++++++
>  2 files changed, 50 insertions(+), 24 deletions(-)
>  delete mode 100644 Documentation/devicetree/bindings/watchdog/dw_wdt.txt
>  create mode 100644 Documentation/devicetree/bindings/watchdog/snps,dw-wdt.yaml
> 
> diff --git a/Documentation/devicetree/bindings/watchdog/dw_wdt.txt b/Documentation/devicetree/bindings/watchdog/dw_wdt.txt
> deleted file mode 100644
> index eb0914420c7c..000000000000
> --- a/Documentation/devicetree/bindings/watchdog/dw_wdt.txt
> +++ /dev/null
> @@ -1,24 +0,0 @@
> -Synopsys Designware Watchdog Timer
> -
> -Required Properties:
> -
> -- compatible	: Should contain "snps,dw-wdt"
> -- reg		: Base address and size of the watchdog timer registers.
> -- clocks	: phandle + clock-specifier for the clock that drives the
> -		watchdog timer.
> -
> -Optional Properties:
> -
> -- interrupts	: The interrupt used for the watchdog timeout warning.
> -- resets	: phandle pointing to the system reset controller with
> -		line index for the watchdog.
> -
> -Example:
> -
> -	watchdog0: wd@...02000 {
> -		compatible = "snps,dw-wdt";
> -		reg = <0xffd02000 0x1000>;
> -		interrupts = <0 171 4>;
> -		clocks = <&per_base_clk>;
> -		resets = <&rst WDT0_RESET>;
> -	};
> diff --git a/Documentation/devicetree/bindings/watchdog/snps,dw-wdt.yaml b/Documentation/devicetree/bindings/watchdog/snps,dw-wdt.yaml
> new file mode 100644
> index 000000000000..4f6944756ab4
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/watchdog/snps,dw-wdt.yaml
> @@ -0,0 +1,50 @@
> +# SPDX-License-Identifier: GPL-2.0-only
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/watchdog/snps,dw-wdt.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Synopsys Designware Watchdog Timer
> +
> +allOf:
> +  - $ref: "watchdog.yaml#"
> +
> +maintainers:
> +  - Jamie Iles <jamie@...ieiles.com>
> +
> +properties:
> +  compatible:
> +    const: snps,dw-wdt
> +
> +  reg:
> +    maxItems: 1
> +
> +  interrupts:
> +    description: DW Watchdog pre-timeout interrupt
> +    maxItems: 1
> +
> +  clocks:
> +    items:
> +      - description: Watchdog timer reference clock
> +
> +  resets:
> +    description: Phandle to the DW Watchdog reset lane
> +    maxItems: 1
> +
> +unevaluatedProperties: false
> +
> +required:
> +  - compatible
> +  - reg
> +  - clocks
> +
> +examples:
> +  - |
> +    watchdog@...02000 {
> +      compatible = "snps,dw-wdt";
> +      reg = <0xffd02000 0x1000>;
> +      interrupts = <0 171 4>;
> +      clocks = <&per_base_clk>;
> +      resets = <&wdt_rst>;
> +    };
> +...