linux-kernel - Re: [PATCH V10 1/4] dt-bindings: fsl: scu: add thermal binding

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Date:   Wed, 27 Feb 2019 17:54:55 -0600
From:   Rob Herring <robh@...nel.org>
To:     Anson Huang <anson.huang@....com>
Cc:     "mark.rutland@....com" <mark.rutland@....com>,
        "shawnguo@...nel.org" <shawnguo@...nel.org>,
        "s.hauer@...gutronix.de" <s.hauer@...gutronix.de>,
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        "festevam@...il.com" <festevam@...il.com>,
        "catalin.marinas@....com" <catalin.marinas@....com>,
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        Aisheng Dong <aisheng.dong@....com>,
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        Daniel Baluta <daniel.baluta@....com>,
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Subject: Re: [PATCH V10 1/4] dt-bindings: fsl: scu: add thermal binding

On Wed, Feb 27, 2019 at 08:46:21AM +0000, Anson Huang wrote:
> NXP i.MX8QXP is an ARMv8 SoC with a Cortex-M4 core inside as
> system controller, the system controller is in charge of system
> power, clock and thermal sensors etc. management, Linux kernel
> has to communicate with system controller via MU (message unit)
> IPC to get temperature from thermal sensors, this patch adds
> binding doc for i.MX system controller thermal driver.
> 
> Signed-off-by: Anson Huang <Anson.Huang@....com>
> ---
> Changes since V9:
> 	- change #thermal-sensor-cells value in example to 1, since there are other
> 	  thermal sensors inside system controller, it is just because there are still
> 	  some issue, so system controller does NOT expose them for now, they could
> 	  be exposed later, so it should be 1 from HW perspective.
> ---
>  .../devicetree/bindings/arm/freescale/fsl,scu.txt   | 21 +++++++++++++++++++++
>  1 file changed, 21 insertions(+)
> 
> diff --git a/Documentation/devicetree/bindings/arm/freescale/fsl,scu.txt b/Documentation/devicetree/bindings/arm/freescale/fsl,scu.txt
> index 72d481c..855270b 100644
> --- a/Documentation/devicetree/bindings/arm/freescale/fsl,scu.txt
> +++ b/Documentation/devicetree/bindings/arm/freescale/fsl,scu.txt
> @@ -122,6 +122,21 @@ RTC bindings based on SCU Message Protocol
>  Required properties:
>  - compatible: should be "fsl,imx8qxp-sc-rtc";
>  
> +Thermal bindings based on SCU Message Protocol
> +------------------------------------------------------------
> +
> +Required properties:
> +- compatible:			Should be :
> +				  "fsl,imx8qxp-sc-thermal"
> +				followed by "fsl,imx-sc-thermal";
> +
> +- #thermal-sensor-cells:	See Documentation/devicetree/bindings/thermal/thermal.txt
> +				for a description.
> +
> +- imx,sensor-resource-id: 	A single integer for single thermal zone's resource ID or
> +				an array of integers to specify each thermal zone's sensor
> +				resource ID.

Can't you put the resource ids in the thermal-sensor cells? Why do you 
need to list them here?

Rob