linux-kernel - [PATCH v10 1/4] dt-bindings: can: m

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Message-Id: <20251001-topic-mcan-wakeup-source-v6-12-v10-1-4ab508ac5d1e@baylibre.com>
Date: Wed, 01 Oct 2025 16:30:19 +0200
From: "Markus Schneider-Pargmann (TI.com)" <msp@...libre.com>
To: Chandrasekar Ramakrishnan <rcsekar@...sung.com>, 
 Marc Kleine-Budde <mkl@...gutronix.de>, Rob Herring <robh@...nel.org>, 
 Krzysztof Kozlowski <krzk+dt@...nel.org>, 
 Conor Dooley <conor+dt@...nel.org>, Vincent Mailhol <mailhol@...nel.org>
Cc: Vishal Mahaveer <vishalm@...com>, Kevin Hilman <khilman@...libre.com>, 
 Dhruva Gole <d-gole@...com>, Sebin Francis <sebin.francis@...com>, 
 Kendall Willis <k-willis@...com>, Akashdeep Kaur <a-kaur@...com>, 
 Simon Horman <horms@...nel.org>, linux-can@...r.kernel.org, 
 devicetree@...r.kernel.org, linux-kernel@...r.kernel.org, 
 "Markus Schneider-Pargmann (TI.com)" <msp@...libre.com>, 
 Vincent Mailhol <mailhol@...nel.org>
Subject: [PATCH v10 1/4] 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@...libre.com>
---
 .../devicetree/bindings/net/can/bosch,m_can.yaml   | 25 ++++++++++++++++++++++
 1 file changed, 25 insertions(+)

diff --git a/Documentation/devicetree/bindings/net/can/bosch,m_can.yaml b/Documentation/devicetree/bindings/net/can/bosch,m_can.yaml
index 61ef60d8f1c78c40a6c8458ed30b940b1121d83f..2c9d37975bedd652b3060ab11ba75c37565edaad 100644
--- a/Documentation/devicetree/bindings/net/can/bosch,m_can.yaml
+++ b/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

-- 
2.51.0