linux-kernel - [PATCH v4 2/4] dt-bindings: can: can-transceiver: Document new binding

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Date:   Wed, 9 Aug 2017 19:59:14 -0500
From:   Franklin S Cooper Jr <fcooper@...com>
To:     <linux-kernel@...r.kernel.org>, <devicetree@...r.kernel.org>,
        <netdev@...r.kernel.org>, <linux-can@...r.kernel.org>,
        <wg@...ndegger.com>, <mkl@...gutronix.de>, <robh+dt@...nel.org>,
        <quentin.schulz@...e-electrons.com>,
        <dev.kurt@...dijck-laurijssen.be>, <andrew@...n.ch>,
        <sergei.shtylyov@...entembedded.com>, <socketcan@...tkopp.net>
CC:     Franklin S Cooper Jr <fcooper@...com>
Subject: [PATCH v4 2/4] dt-bindings: can: can-transceiver: Document new binding

Add documentation to describe usage of the new can-transceiver binding.
This new binding is applicable for any CAN device therefore it exists as
its own document.

Signed-off-by: Franklin S Cooper Jr <fcooper@...com>
---
Version 4 changes:
Drop unit address.
Switch from using fixed-transceiver to can-transceiver

 .../bindings/net/can/can-transceiver.txt           | 24 ++++++++++++++++++++++
 1 file changed, 24 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/net/can/can-transceiver.txt

diff --git a/Documentation/devicetree/bindings/net/can/can-transceiver.txt b/Documentation/devicetree/bindings/net/can/can-transceiver.txt
new file mode 100644
index 0000000..2c31dc0
--- /dev/null
+++ b/Documentation/devicetree/bindings/net/can/can-transceiver.txt
@@ -0,0 +1,24 @@
+Generic CAN transceiver Device Tree binding
+------------------------------
+
+CAN transceiver typically limits the max speed in standard CAN and CAN FD
+modes. Typically these limitations are static and the transceivers themselves
+provide no way to detect this limitation at runtime. For this situation,
+the "can-transceiver" node can be used.
+
+Required Properties:
+ max-bitrate:	a positive non 0 value that determines the max
+		speed that CAN/CAN-FD can run. Any other value
+		will be ignored.
+
+Examples:
+
+Based on Texas Instrument's TCAN1042HGV CAN Transceiver
+
+m_can0 {
+	....
+	can-transceiver@ {
+		max-bitrate = <5000000>;
+	};
+	...
+};
-- 
2.9.4.dirty