linux-kernel - Re: [PATCH V2 3/4] dt-bindings: power: reset: qcom-pon: Convert qcom PON binding to yaml

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Message-ID: <20210408130001.k3qbq3vvwkiyykzv@earth.universe>
Date:   Thu, 8 Apr 2021 15:00:01 +0200
From:   Sebastian Reichel <sebastian.reichel@...labora.com>
To:     satya priya <skakit@...eaurora.org>
Cc:     Dmitry Torokhov <dmitry.torokhov@...il.com>,
        Rob Herring <robh+dt@...nel.org>,
        Andy Gross <agross@...nel.org>,
        Bjorn Andersson <bjorn.andersson@...aro.org>,
        David Collins <collinsd@...eaurora.org>, kgunda@...eaurora.org,
        Vinod Koul <vkoul@...nel.org>,
        Courtney Cavin <courtney.cavin@...ymobile.com>,
        linux-input@...r.kernel.org, linux-kernel@...r.kernel.org,
        devicetree@...r.kernel.org, linux-arm-msm@...r.kernel.org,
        linux-pm@...r.kernel.org
Subject: Re: [PATCH V2 3/4] dt-bindings: power: reset: qcom-pon: Convert qcom
 PON binding to yaml

Hi,

On Thu, Apr 08, 2021 at 05:01:08PM +0530, satya priya wrote:
> Convert qcom PON binding from .txt to .yaml format.
> 
> Signed-off-by: satya priya <skakit@...eaurora.org>
> ---

Thanks for doing this.

> Changes in V2:
>  - As per Rob's comments, converted the main PON binding and added in V2.
> 
>  .../devicetree/bindings/power/reset/qcom,pon.txt   | 49 ----------------------
>  .../devicetree/bindings/power/reset/qcom,pon.yaml  | 41 ++++++++++++++++++
>  2 files changed, 41 insertions(+), 49 deletions(-)
>  delete mode 100644 Documentation/devicetree/bindings/power/reset/qcom,pon.txt
>  create mode 100644 Documentation/devicetree/bindings/power/reset/qcom,pon.yaml
> 
> diff --git a/Documentation/devicetree/bindings/power/reset/qcom,pon.txt b/Documentation/devicetree/bindings/power/reset/qcom,pon.txt
> deleted file mode 100644
> index 0c0dc3a..0000000
> --- a/Documentation/devicetree/bindings/power/reset/qcom,pon.txt
> +++ /dev/null
> @@ -1,49 +0,0 @@
> -Qualcomm PON Device
> -
> -The Power On device for Qualcomm PM8xxx is MFD supporting pwrkey
> -and resin along with the Android reboot-mode.
> -
> -This DT node has pwrkey and resin as sub nodes.
> -
> -Required Properties:
> --compatible: Must be one of:
> -	"qcom,pm8916-pon"
> -	"qcom,pms405-pon"
> -	"qcom,pm8998-pon"
> -
> --reg: Specifies the physical address of the pon register
> -
> -Optional subnode:
> --pwrkey: Specifies the subnode pwrkey and should follow the
> - qcom,pm8941-pwrkey.txt description.
> --resin: Specifies the subnode resin and should follow the
> - qcom,pm8xxx-pwrkey.txt description.
> -
> -The rest of the properties should follow the generic reboot-mode description
> -found in reboot-mode.txt
> -
> -Example:
> -
> -	pon@800 {
> -		compatible = "qcom,pm8916-pon";
> -
> -		reg = <0x800>;
> -		mode-bootloader = <0x2>;
> -		mode-recovery = <0x1>;
> -
> -		pwrkey {
> -			compatible = "qcom,pm8941-pwrkey";
> -			interrupts = <0x0 0x8 0 IRQ_TYPE_EDGE_BOTH>;
> -			debounce = <15625>;
> -			bias-pull-up;
> -			linux,code = <KEY_POWER>;
> -		};
> -
> -		resin {
> -			compatible = "qcom,pm8941-resin";
> -			interrupts = <0x0 0x8 1 IRQ_TYPE_EDGE_BOTH>;
> -			debounce = <15625>;
> -			bias-pull-up;
> -			linux,code = <KEY_VOLUMEDOWN>;
> -		};
> -	};
> diff --git a/Documentation/devicetree/bindings/power/reset/qcom,pon.yaml b/Documentation/devicetree/bindings/power/reset/qcom,pon.yaml
> new file mode 100644
> index 0000000..40eea5f1
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/power/reset/qcom,pon.yaml
> @@ -0,0 +1,41 @@
> +# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/power/reset/qcom,pon.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Qualcomm PON Device
> +
> +maintainers:
> +  - Vinod Koul <vkoul@...nel.org>
> +
> +description: |
> +  The Power On device for Qualcomm PM8xxx is MFD supporting pwrkey
> +  and resin along with the Android reboot-mode.
> +
> +  This DT node has pwrkey and resin as sub nodes.
> +
> +properties:
> +  compatible:
> +    enum:
> +      - qcom,pm8916-pon
> +      - qcom,pms405-pon
> +      - qcom,pm8998-pon
> +
> +  reg:
> +    description: Specifies the physical address of the pon register

That description is obvious and pointless. Instead add

maxItems: 1

> +  pwrkey:
> +    type: object
> +    $ref: "../../input/qcom,pm8941-pwrkey.yaml#"
> +
> +  resin:
> +    type: object
> +    $ref: "../../input/qcom,pm8941-pwrkey.yaml#"
> +
> +required:
> +  - compatible
> +  - reg
> +
> +additionalProperties: true

Instead of allowing arbitrary properties, only valid modes
should be allowed. So drop additionalProperties and do this
instead:

allOf:
  - $ref: reboot-mode.yaml#

unevaluatedProperties: false

> +...

Please do not drop the example :)

-- Sebastian

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