The pins associated with m_can have to have a special configuration to
be able to wakeup the SoC from some system states. This configuration is
described in the wakeup pinctrl state while the default state describes
the default configuration.

Also m_can can be a wakeup-source if capable of wakeup.

Signed-off-by: Markus Schneider-Pargmann <msp@baylibre.com>
---
 .../devicetree/bindings/net/can/bosch,m_can.yaml       | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)

diff --git a/Documentation/devicetree/bindings/net/can/bosch,m_can.yaml b/Documentation/devicetree/bindings/net/can/bosch,m_can.yaml
index c4887522e8fe97c3947357b4dbd4ecf20ee8100a..0c1f9fa7371897d45539ead49c9d290fb4966f30 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 +138,8 @@ properties:
     minItems: 1
     maxItems: 2
 
+  wakeup-source: true
+
 required:
   - compatible
   - reg

-- 
2.47.2

On Thu, Mar 06, 2025 at 12:14:41PM +0100, Markus Schneider-Pargmann wrote:
> +  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 +138,8 @@ properties:
>      minItems: 1
>      maxItems: 2
>  
> +  wakeup-source: true

If this patchset depends on dtschema pull, then this should be narrowed
to specific type, I think. Otherwise how exactly your drivers are going
to work if this is just "wakeup-source;"?

Best regards,
Krzysztof