linux-kernel - Re: [PATCH v4 1/4] dt-bindings: power: reset: Convert mode-.* properties to array

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Date: Tue, 11 Jun 2024 14:40:01 -0600
From: Rob Herring <robh@...nel.org>
To: Elliot Berman <quic_eberman@...cinc.com>
Cc: Bjorn Andersson <andersson@...nel.org>,
	Konrad Dybcio <konrad.dybcio@...aro.org>,
	Sebastian Reichel <sre@...nel.org>,
	Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
	Conor Dooley <conor+dt@...nel.org>, Vinod Koul <vkoul@...nel.org>,
	Andy Yan <andy.yan@...k-chips.com>,
	Lorenzo Pieralisi <lpieralisi@...nel.org>,
	Mark Rutland <mark.rutland@....com>,
	Bartosz Golaszewski <bartosz.golaszewski@...aro.org>,
	Satya Durga Srinivasu Prabhala <quic_satyap@...cinc.com>,
	Melody Olvera <quic_molvera@...cinc.com>,
	Shivendra Pratap <quic_spratap@...cinc.com>,
	devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org,
	Florian Fainelli <florian.fainelli@...adcom.com>,
	linux-pm@...r.kernel.org, linux-arm-msm@...r.kernel.org
Subject: Re: [PATCH v4 1/4] dt-bindings: power: reset: Convert mode-.*
 properties to array

On Tue, Jun 11, 2024 at 08:35:13AM -0700, Elliot Berman wrote:
> PSCI reboot mode will map a mode name to multiple magic values instead
> of just one. Convert the mode-.* property to an array. Users of the
> reboot-mode schema will need to specify the maxItems of the mode-.*
> properties. Existing users will all be 1.
> 
> Signed-off-by: Elliot Berman <quic_eberman@...cinc.com>
> ---
>  .../devicetree/bindings/power/reset/nvmem-reboot-mode.yaml        | 5 +++++
>  Documentation/devicetree/bindings/power/reset/qcom,pon.yaml       | 8 ++++++++
>  Documentation/devicetree/bindings/power/reset/reboot-mode.yaml    | 4 ++--
>  .../devicetree/bindings/power/reset/syscon-reboot-mode.yaml       | 5 +++++
>  4 files changed, 20 insertions(+), 2 deletions(-)
> 
> diff --git a/Documentation/devicetree/bindings/power/reset/nvmem-reboot-mode.yaml b/Documentation/devicetree/bindings/power/reset/nvmem-reboot-mode.yaml
> index 627f8a6078c2..9b9bbc0f29e7 100644
> --- a/Documentation/devicetree/bindings/power/reset/nvmem-reboot-mode.yaml
> +++ b/Documentation/devicetree/bindings/power/reset/nvmem-reboot-mode.yaml
> @@ -31,6 +31,11 @@ properties:
>  allOf:
>    - $ref: reboot-mode.yaml#
>  
> +patternProperties:
> +  "^mode-.*$":
> +    items:
> +      maxItems: 1

Drop 'items'. Otherwise, you are defining constraints of a matrix.

> +
>  required:
>    - compatible
>    - nvmem-cells
> diff --git a/Documentation/devicetree/bindings/power/reset/qcom,pon.yaml b/Documentation/devicetree/bindings/power/reset/qcom,pon.yaml
> index fc8105a7b9b2..4c87ff5ecc9a 100644
> --- a/Documentation/devicetree/bindings/power/reset/qcom,pon.yaml
> +++ b/Documentation/devicetree/bindings/power/reset/qcom,pon.yaml
> @@ -54,6 +54,11 @@ required:
>    - compatible
>    - reg
>  
> +patternProperties:
> +  "^mode-.*$":
> +    items:
> +      maxItems: 1
> +
>  unevaluatedProperties: false
>  
>  allOf:
> @@ -75,6 +80,9 @@ allOf:
>          reg-names:
>            items:
>              - const: pon
> +    else:
> +      patternProperties:
> +        "^mode-.*$": false
>  
>      # Special case for pm8941, which doesn't store reset mode
>    - if:
> diff --git a/Documentation/devicetree/bindings/power/reset/reboot-mode.yaml b/Documentation/devicetree/bindings/power/reset/reboot-mode.yaml
> index ad0a0b95cec1..523602fb82d2 100644
> --- a/Documentation/devicetree/bindings/power/reset/reboot-mode.yaml
> +++ b/Documentation/devicetree/bindings/power/reset/reboot-mode.yaml
> @@ -28,13 +28,13 @@ description: |
>  
>  properties:
>    mode-normal:
> -    $ref: /schemas/types.yaml#/definitions/uint32
> +    $ref: "#/patternProperties/^mode-.*$"

No need for this. The pattern schema will be applied already. Also, a 
$ref to a regex is fragile as it won't work for some regex patterns.

>      description:
>        Default value to set on a reboot if no command was provided.
>  
>  patternProperties:
>    "^mode-.*$":
> -    $ref: /schemas/types.yaml#/definitions/uint32
> +    $ref: /schemas/types.yaml#/definitions/uint32-array
>  
>  additionalProperties: true
>  
> diff --git a/Documentation/devicetree/bindings/power/reset/syscon-reboot-mode.yaml b/Documentation/devicetree/bindings/power/reset/syscon-reboot-mode.yaml
> index b6acff199cde..e9d2e3b27885 100644
> --- a/Documentation/devicetree/bindings/power/reset/syscon-reboot-mode.yaml
> +++ b/Documentation/devicetree/bindings/power/reset/syscon-reboot-mode.yaml
> @@ -32,6 +32,11 @@ properties:
>  allOf:
>    - $ref: reboot-mode.yaml#
>  
> +patternProperties:
> +  "^mode-.*$":
> +    items:
> +      maxItems: 1
> +
>  unevaluatedProperties: false
>  
>  required:
> 
> -- 
> 2.34.1
>