Subject: Re: [PATCH v2 1/7] dt-bindings: can: m_can: Add wakeup properties

From: Rob Herring <[email-masked]>
Date: Tue, 30 Jul 2024 13:10:39 -0600

On Mon, Jul 29, 2024 at 09:41:29AM +0200, Markus Schneider-Pargmann wrote:
> m_can can be a wakeup source on some devices. Especially on some of the
> am62* SoCs pins, connected to m_can in the mcu, can be used to wakeup
> the SoC.
> 
> The wakeup-source property defines on which devices m_can can be used
> for wakeup.
> 
> The pins associated with m_can have to have a special configuration to
> be able to wakeup the SoC. This configuration is described in the wakeup
> pinctrl state while the default state describes the default
> configuration.
> 
> Signed-off-by: Markus Schneider-Pargmann <[email-masked]>
> ---
>  .../bindings/net/can/bosch,m_can.yaml         | 20 +++++++++++++++++++
>  1 file changed, 20 insertions(+)
> 
> diff --git a/Documentation/devicetree/bindings/net/can/bosch,m_can.yaml b/Documentation/devicetree/bindings/net/can/bosch,m_can.yaml
> index c4887522e8fe..ef63f6b8455d 100644
> --- a/Documentation/devicetree/bindings/net/can/bosch,m_can.yaml
> +++ b/Documentation/devicetree/bindings/net/can/bosch,m_can.yaml
> @@ -106,6 +106,22 @@ properties:
>          maximum: 32
>      minItems: 1
>  
> +  pinctrl-0:
> +    description: Default pinctrl state
> +
> +  pinctrl-1:
> +    description: Wakeup pinctrl state
> +
> +  pinctrl-names:
> +    description:
> +      When present should contain at least "default" describing the default pin
> +      states. The second state called "wakeup" describes the pins in their
> +      wakeup configuration required to exit sleep states.
> +    minItems: 1
> +    items:
> +      - const: default
> +      - const: wakeup
> +
>    power-domains:
>      description:
>        Power domain provider node and an args specifier containing
> @@ -122,6 +138,10 @@ properties:
>      minItems: 1
>      maxItems: 2
>  
> +  wakeup-source:
> +    $ref: /schemas/types.yaml#/definitions/flag

I thought we had a common schema defining the type, but we don't. I'm 
going to add it now. So just need:

wakeup-source: true

> +    description: This device is capable to wakeup the SoC.
> +
>  required:
>    - compatible
>    - reg
> -- 
> 2.45.2
>