linux-kernel - [PATCH v9 1/4] dt-bindings: can: m

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Message-Id: <20250820-topic-mcan-wakeup-source-v6-12-v9-1-0ac13f2ddd67@baylibre.com>
Date: Wed, 20 Aug 2025 14:42:25 +0200
From: Markus Schneider-Pargmann <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>
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>, 
 Vincent MAILHOL <mailhol.vincent@...adoo.fr>, linux-can@...r.kernel.org, 
 devicetree@...r.kernel.org, linux-kernel@...r.kernel.org, 
 Markus Schneider-Pargmann <msp@...libre.com>
Subject: [PATCH v9 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 <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 c4887522e8fe97c3947357b4dbd4ecf20ee8100a..0e00be18a8be681634f25378bb2cdef034dc4e6b 100644
--- a/Documentation/devicetree/bindings/net/can/bosch,m_can.yaml
+++ b/Documentation/devicetree/bindings/net/can/bosch,m_can.yaml
@@ -106,6 +106,26 @@ 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
+      - const: sleep
+      - const: wakeup
+
   power-domains:
     description:
       Power domain provider node and an args specifier containing
@@ -122,6 +142,11 @@ 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

-- 
2.50.1