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

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Date:   Fri, 09 Apr 2021 13:48:58 +0530
From:   skakit@...eaurora.org
To:     Sebastian Reichel <sebastian.reichel@...labora.com>
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 Sebastian,

On 2021-04-08 18:30, Sebastian Reichel wrote:
> 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
> 

Okay.

>> +  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
> 

Okay.

>> +...
> 
> Please do not drop the example :)
> 

As per my understanding on Rob's comments [1] I have added one complete 
example in qcom,pm8941-pwrkey.yaml (see patch 4/4) and dropped it here.

[1] https://lore.kernel.org/patchwork/patch/1390062/#1588027

> -- Sebastian

Thanks,
Satya Priya