dt-bindings: can: tcan4x5x: Document the ti,nwkrq-voltage-vio option

The nWKRQ pin supports an output voltage of either the internal reference
voltage (3.6V) or the reference voltage of
the digital interface 0-6V (VIO).
Add the devicetree option ti,nwkrq-voltage-vio to set it to VIO.

If this property is omitted the reset default, the internal reference
voltage, is used.

Signed-off-by: Sean Nyekjaer <sean@geanix.com>
Reviewed-by: Rob Herring (Arm) <robh@kernel.org>
Reviewed-by: Marc Kleine-Budde <mkl@pengutronix.de>
Link: https://patch.msgid.link/20241114-tcan-wkrqv-v5-1-a2d50833ed71@geanix.com
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>

diff --git a/Documentation/devicetree/bindings/net/can/ti,tcan4x5x.yaml b/Documentation/devicetree/bindings/net/can/ti,tcan4x5x.yaml
index afd9d315dea2ae4e2dcafd8fa98e1765af7ac2d3..384e15da27136c0bad39c4d9f6cc0456fb0d5b19 100644 (file)
--- a/Documentation/devicetree/bindings/net/can/ti,tcan4x5x.yaml
+++ b/Documentation/devicetree/bindings/net/can/ti,tcan4x5x.yaml
@@ -110,6 +110,13 @@ properties:
       Must be half or less of "clocks" frequency.
     maximum: 18000000
 
+  ti,nwkrq-voltage-vio:
+    type: boolean
+    description:
+      nWKRQ Pin GPO buffer voltage configuration.
+      Set nWKRQ to use VIO voltage rail.
+      When not set nWKRQ will use internal voltage rail.
+
   wakeup-source:
     $ref: /schemas/types.yaml#/definitions/flag
     description:
@@ -163,6 +170,7 @@ examples:
             device-state-gpios = <&gpio3 21 GPIO_ACTIVE_HIGH>;
             device-wake-gpios = <&gpio1 15 GPIO_ACTIVE_HIGH>;
             reset-gpios = <&gpio1 27 GPIO_ACTIVE_HIGH>;
+            ti,nwkrq-voltage-vio;
             wakeup-source;
         };
     };