dt-bindings: phy: ti,tcan104x-can: Document mux-states property

On some boards, for routing CAN signals from controller to transceivers,
muxes might need to be set. This can be implemented using mux-states
property. Therefore, document the same in the respective bindings.
Signed-off-by: Aswath Govindraju <a-govindraju@ti.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20211216041012.16892-2-a-govindraju@ti.com

Documentation/devicetree/bindings/phy/ti,tcan104x-can.yaml

@@ -37,6 +37,12 @@ properties:
       max bit rate supported in bps
     minimum: 1
 
+  mux-states:
+    description:
+      mux controller node to route the signals from controller to
+      transceiver.
+    maxItems: 1
+
 required:
   - compatible
   - '#phy-cells'
@@ -53,4 +59,5 @@ examples:
       max-bitrate = <5000000>;
       standby-gpios = <&wakeup_gpio1 16 GPIO_ACTIVE_LOW>;
       enable-gpios = <&main_gpio1 67 GPIO_ACTIVE_HIGH>;
+      mux-states = <&mux0 1>;
     };