dt-bindings: can: m_can: Add wakeup properties

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 add the sleep state which is already in
use by some devicetrees.

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

Signed-off-by: Markus Schneider-Pargmann (TI.com) <msp@baylibre.com>
Reviewed-by: Dhruva Gole <d-gole@ti.com>
Reviewed-by: Rob Herring (Arm) <robh@kernel.org>
Link: https://patch.msgid.link/20251001-topic-mcan-wakeup-source-v6-12-v10-1-4ab508ac5d1e@baylibre.com
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>

Documentation/devicetree/bindings/net/can/bosch,m_can.yaml

@@ -109,6 +109,26 @@ properties:
         maximum: 32
     minItems: 1
 
+  pinctrl-0:
+    description: Default pinctrl state
+
+  pinctrl-1:
+    description: Can be "sleep" or "wakeup" pinctrl state
+
+  pinctrl-2:
+    description: Can be "sleep" or "wakeup" pinctrl state
+
+  pinctrl-names:
+    description:
+      When present should contain at least "default" describing the default pin
+      states. Other states are "sleep" which describes the pinstate when
+      sleeping and "wakeup" describing the pins if wakeup is enabled.
+    minItems: 1
+    items:
+      - const: default
+      - enum: [ sleep, wakeup ]
+      - const: wakeup
+
   power-domains:
     description:
       Power domain provider node and an args specifier containing
@@ -125,6 +145,11 @@ properties:
     minItems: 1
     maxItems: 2
 
+  wakeup-source:
+    $ref: /schemas/types.yaml#/definitions/phandle-array
+    description:
+      List of phandles to system idle states in which mcan can wakeup the system.
+
 required:
   - compatible
   - reg