linux-kernel - Re: [PATCH 1/4] dt-bindings: watchdog: Add i.MX7ULP bindings

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Date:   Fri, 9 Aug 2019 09:42:45 -0700
From:   Guenter Roeck <linux@...ck-us.net>
To:     Anson Huang <Anson.Huang@....com>
Cc:     wim@...ux-watchdog.org, robh+dt@...nel.org, mark.rutland@....com,
        shawnguo@...nel.org, s.hauer@...gutronix.de, kernel@...gutronix.de,
        festevam@...il.com, linux@...linux.org.uk, otavio@...ystems.com.br,
        leonard.crestez@....com, schnitzeltony@...il.com,
        u.kleine-koenig@...gutronix.de, jan.tuerk@...rion.com,
        linux-watchdog@...r.kernel.org, devicetree@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        Linux-imx@....com
Subject: Re: [PATCH 1/4] dt-bindings: watchdog: Add i.MX7ULP bindings

On Fri, Aug 09, 2019 at 03:13:59PM +0800, Anson Huang wrote:
> Add the watchdog bindings for Freescale i.MX7ULP.
> 
> Signed-off-by: Anson Huang <Anson.Huang@....com>
> ---
>  .../bindings/watchdog/fsl-imx7ulp-wdt.txt          | 22 ++++++++++++++++++++++
>  1 file changed, 22 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/watchdog/fsl-imx7ulp-wdt.txt
> 
> diff --git a/Documentation/devicetree/bindings/watchdog/fsl-imx7ulp-wdt.txt b/Documentation/devicetree/bindings/watchdog/fsl-imx7ulp-wdt.txt
> new file mode 100644
> index 0000000..d83fc5c
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/watchdog/fsl-imx7ulp-wdt.txt
> @@ -0,0 +1,22 @@
> +* Freescale i.MX7ULP Watchdog Timer (WDT) Controller
> +
> +Required properties:
> +- compatible : Should be "fsl,imx7ulp-wdt"
> +- reg : Should contain WDT registers location and length
> +- interrupts : Should contain WDT interrupt
> +- clocks: Should contain a phandle pointing to the gated peripheral clock.

The driver as submitted does not include clock or interrupt handling.
Why are those properties listed as mandatory if they are not really
needed (nor used) ?

> +
> +Optional properties:
> +- timeout-sec : Contains the watchdog timeout in seconds
> +
> +Examples:
> +
> +wdog1: wdog@...d0000 {
> +	compatible = "fsl,imx7ulp-wdt";
> +	reg = <0x403d0000 0x10000>;
> +	interrupts = <GIC_SPI 55 IRQ_TYPE_LEVEL_HIGH>;
> +	clocks = <&pcc2 IMX7ULP_CLK_WDG1>;
> +	assigned-clocks = <&pcc2 IMX7ULP_CLK_WDG1>;
> +	assigned-clocks-parents = <&scg1 IMX7ULP_CLK_FIRC_BUS_CLK>;
> +	timeout-sec = <40>;
> +};
> -- 
> 2.7.4
>