linux-kernel - Re: [PATCH 1/4] dt-bindings: power: reset: atmel,sama5d2-shdwc: add lpm binding

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Message-ID: <20250915002100.GA2297583-robh@kernel.org>
Date: Sun, 14 Sep 2025 19:21:00 -0500
From: Rob Herring <robh@...nel.org>
To: Ryan.Wanner@...rochip.com
Cc: claudiu.beznea@...on.dev, sre@...nel.org, krzk+dt@...nel.org,
	conor+dt@...nel.org, nicolas.ferre@...rochip.com,
	alexandre.belloni@...tlin.com, linux@...linux.org.uk,
	linux-pm@...r.kernel.org, devicetree@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
	Varshini Rajendran <varshini.rajendran@...rochip.com>
Subject: Re: [PATCH 1/4] dt-bindings: power: reset: atmel,sama5d2-shdwc: add
 lpm binding

On Wed, Sep 10, 2025 at 09:20:36AM -0700, Ryan.Wanner@...rochip.com wrote:
> From: Varshini Rajendran <varshini.rajendran@...rochip.com>
> 
> Add microchip,lpm-connection binding which allows to specify the devices
> the SHDWC's LPM pin is connected.

What is LPM? It's not defined anywhere in this patch.

> 
> Signed-off-by: Varshini Rajendran <varshini.rajendran@...rochip.com>
> [ryan.wanner@...rochip.com: Add sam9x7-shdwc SoC to properties check]
> Signed-off-by: Ryan Wanner <Ryan.Wanner@...rochip.com>
> ---
>  .../power/reset/atmel,sama5d2-shdwc.yaml         | 16 ++++++++++++++++
>  1 file changed, 16 insertions(+)
> 
> diff --git a/Documentation/devicetree/bindings/power/reset/atmel,sama5d2-shdwc.yaml b/Documentation/devicetree/bindings/power/reset/atmel,sama5d2-shdwc.yaml
> index 9c34249b2d6d..b1a8ccd0873d 100644
> --- a/Documentation/devicetree/bindings/power/reset/atmel,sama5d2-shdwc.yaml
> +++ b/Documentation/devicetree/bindings/power/reset/atmel,sama5d2-shdwc.yaml
> @@ -56,6 +56,10 @@ properties:
>      description: enable real-time timer wake-up
>      type: boolean
>  
> +  microchip,lpm-connection:
> +    description: list of phandles to devices which are connected to SHDWC's LPM pin
> +    $ref: /schemas/types.yaml#/definitions/phandle

This only allows 1 phandle.

> +
>  patternProperties:
>    "^input@[0-15]$":
>      description:
> @@ -96,6 +100,18 @@ allOf:
>        properties:
>          atmel,wakeup-rtt-timer: false
>  
> +  - if:
> +      properties:
> +        compatible:
> +          contains:
> +            enum:
> +              - atmel,sama5d2-shdwc
> +              - microchip,sam9x60-shdwc
> +              - microchip,sam9x7-shdwc
> +    then:
> +      properties:
> +        microchip,lpm-connection: false
> +
>  additionalProperties: false
>  
>  examples:
> -- 
> 2.43.0
>