dt-binding: can: mcp25xxfd: document device tree bindings

Add device-tree bindings for Microcip CanFD Controller mcp2517fd

--
Changelog:
  V1 -> V2: new more generic name based on feedback from microchip
            cleanup of dt custom properties removing (most) gpio functions
  V2 -> V3: added vendor-prefix for gpio-opendrain
            s/_/-/
            added gpio-controller
  V3 -> V4: resend
            added: Reviewed-by: Rob Herring <robh@kernel.org>
  V7 -> V8: added support for mcp2518fd
            added microchip,gpio0-xstandby
            removed Reviewed-by because of changes

Signed-off-by: Martin Sperl <kernel@martin.sperl.org>
(cherry picked from commit ca3c427d353bafffa51d38da57e49f61ba16dbbf)

1 files changed, 34 insertions, 0 deletions

diff --git a/Documentation/devicetree/bindings/net/can/microchip,mcp25xxfd.txt b/Documentation/devicetree/bindings/net/can/microchip,mcp25xxfd.txt
new file mode 100644
index 000000000000..d53754d6d2a4
--- /dev/null
+++ b/Documentation/devicetree/bindings/net/can/microchip,mcp25xxfd.txt
@@ -0,0 +1,34 @@
+* Microchip MCP2517 stand-alone CAN controller device tree bindings
+
+Required properties:
+ - compatible: Should be one of the following:
+   - "microchip,mcp2517fd" for MCP2517fd.
+   - "microchip,mcp2518fd" for MCP2518fd.
+ - reg: SPI chip select.
+ - clocks: The clock feeding the CAN controller.
+ - interrupt-parent: The parent interrupt controller.
+ - interrupts: Should contain IRQ line for the CAN controller.
+ - gpio-controller: Marks the device node as a GPIO controller
+
+Optional properties:
+ - vdd-supply: Regulator that powers the CAN controller.
+ - xceiver-supply: Regulator that powers the CAN transceiver.
+ - microchip,clock-out-div = <0|1|2|4|10>: Clock output pin divider
+					   0 = Start of Frame output
+					   default: 10
+ - microchip,clock-div2: bool: divide the internal clock by 2
+ - microchip,gpio-open-drain: bool: enable open-drain for all pins
+                                    (except cantx)
+ - microchip,gpio0-xstandby: bool: enable xstandby functionality on gpio 0
+
+Example:
+	can0: can@1 {
+		compatible = "microchip,mcp2517fd";
+		reg = <1>;
+		clocks = <&clk24m>;
+		interrupt-parent = <&gpio4>;
+		interrupts = <13 0x8>;
+		vdd-supply = <&reg5v0>;
+		xceiver-supply = <&reg5v0>;
+		gpio-controller;
+	};