linux-kernel - Re: [PATCH v3 2/3] dt-bindings: watchdog: sunxi: Add compatibles for D1

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Date:   Sat, 4 Sep 2021 08:11:48 -0700
From:   Guenter Roeck <linux@...ck-us.net>
To:     Samuel Holland <samuel@...lland.org>
Cc:     Wim Van Sebroeck <wim@...ux-watchdog.org>,
        Rob Herring <robh+dt@...nel.org>,
        Maxime Ripard <mripard@...nel.org>,
        Chen-Yu Tsai <wens@...e.org>,
        Jernej Skrabec <jernej.skrabec@...il.com>,
        Icenowy Zheng <icenowy@...c.io>, devicetree@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, linux-sunxi@...ts.linux.dev,
        linux-watchdog@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v3 2/3] dt-bindings: watchdog: sunxi: Add compatibles for
 D1

On Thu, Sep 02, 2021 at 05:57:49PM -0500, Samuel Holland wrote:
> D1 keeps the same register layout and clock sources as the R329, but it
> adds a key field which must be set to update the watchdog's "CFG" and
> "MODE" registers. Therefore it is not backward-compatible.
> 
> Similarly to the R329, the D1 has three watchdog instances, and only one
> of them has the "soft reset" registers. So that instance needs an extra
> compatible string.
> 
> Signed-off-by: Samuel Holland <samuel@...lland.org>
> Acked-by: Maxime Ripard <maxime@...no.tech>

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

> ---
> Changes v2 to v3:
>  - Add additional allwinner,sun20i-d1-wdt-reset compatible
> Changes v1 to v2:
>  - None
> 
>  .../bindings/watchdog/allwinner,sun4i-a10-wdt.yaml          | 6 ++++++
>  1 file changed, 6 insertions(+)
> 
> diff --git a/Documentation/devicetree/bindings/watchdog/allwinner,sun4i-a10-wdt.yaml b/Documentation/devicetree/bindings/watchdog/allwinner,sun4i-a10-wdt.yaml
> index 877f47759814..44cad9427ae6 100644
> --- a/Documentation/devicetree/bindings/watchdog/allwinner,sun4i-a10-wdt.yaml
> +++ b/Documentation/devicetree/bindings/watchdog/allwinner,sun4i-a10-wdt.yaml
> @@ -30,6 +30,10 @@ properties:
>        - items:
>            - const: allwinner,suniv-f1c100s-wdt
>            - const: allwinner,sun4i-a10-wdt
> +      - const: allwinner,sun20i-d1-wdt
> +      - items:
> +          - const: allwinner,sun20i-d1-wdt-reset
> +          - const: allwinner,sun20i-d1-wdt
>  
>    reg:
>      maxItems: 1
> @@ -62,6 +66,8 @@ if:
>      compatible:
>        contains:
>          enum:
> +          - allwinner,sun20i-d1-wdt
> +          - allwinner,sun20i-d1-wdt-reset
>            - allwinner,sun50i-r329-wdt
>            - allwinner,sun50i-r329-wdt-reset
>