linux-kernel - [PATCH 1/2] dt-bindings: phy: ti,tcan104x-can: Document mux-states property

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Message-ID: <20211202131002.12217-2-a-govindraju@ti.com>
Date:   Thu, 2 Dec 2021 18:40:01 +0530
From:   Aswath Govindraju <a-govindraju@...com>
To:     unlisted-recipients:; (no To-header on input)
CC:     Aswath Govindraju <a-govindraju@...com>,
        Wolfgang Grandegger <wg@...ndegger.com>,
        Marc Kleine-Budde <mkl@...gutronix.de>,
        Kishon Vijay Abraham I <kishon@...com>,
        Vinod Koul <vkoul@...nel.org>,
        Rob Herring <robh+dt@...nel.org>, <linux-can@...r.kernel.org>,
        <linux-phy@...ts.infradead.org>, <devicetree@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>
Subject: [PATCH 1/2] 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@...com>
---
 .../devicetree/bindings/phy/ti,tcan104x-can.yaml    | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/Documentation/devicetree/bindings/phy/ti,tcan104x-can.yaml b/Documentation/devicetree/bindings/phy/ti,tcan104x-can.yaml
index 6107880e5246..5b2b08016635 100644
--- a/Documentation/devicetree/bindings/phy/ti,tcan104x-can.yaml
+++ b/Documentation/devicetree/bindings/phy/ti,tcan104x-can.yaml
@@ -37,6 +37,18 @@ properties:
       max bit rate supported in bps
     minimum: 1
 
+  mux-states:
+    description:
+      mux controller node to route the signals from controller to
+      transceiver. Depending on the mux chip and the control lines
+      in it, the first and second parameters can be used for
+      representing control line and state. The number of arguments
+      is to be used based on '#mux-state-cells' property in the
+      mux-controller node. If '#mux-state-cells' is equal to
+      one then, then the argument to be used would be the state.
+      If it is set to two, then the first argument is the control
+      line and the second argument would be its corresponding state.
+
 required:
   - compatible
   - '#phy-cells'
@@ -53,4 +65,5 @@ examples:
       max-bitrate = <5000000>;
       standby-gpios = <&wakeup_gpio1 16 GPIO_ACTIVE_LOW>;
       enable-gpios = <&main_gpio1 67 GPIO_ACTIVE_HIGH>;
+      mux-states = <&mux0 1>;
     };
-- 
2.17.1