Xilinx Axi CAN/Zynq CANPS controller Device Tree Bindings
---------------------------------------------------------

Required properties:
- compatible		: Should be "xlnx,zynq-can-1.0" for Zynq CAN
			  controllers and "xlnx,axi-can-1.00.a" for Axi CAN
			  controllers.
- reg			: Physical base address and size of the Axi CAN/Zynq
			  CANPS registers map.
- interrupts		: Property with a value describing the interrupt
			  number.
- interrupt-parent	: Must be core interrupt controller
- clock-names		: List of input clock names - "can_clk", "pclk"
			  (For CANPS), "can_clk" , "s_axi_aclk"(For AXI CAN)
			  (See clock bindings for details).
- clocks		: Clock phandles (see clock bindings for details).
- tx-fifo-depth		: Can Tx fifo depth.
- rx-fifo-depth		: Can Rx fifo depth.


Example:

For Zynq CANPS Dts file:
	zynq_can_0: can@e0008000 {
			compatible = "xlnx,zynq-can-1.0";
			clocks = <&clkc 19>, <&clkc 36>;
			clock-names = "can_clk", "pclk";
			reg = <0xe0008000 0x1000>;
			interrupts = <0 28 4>;
			interrupt-parent = <&intc>;
			tx-fifo-depth = <0x40>;
			rx-fifo-depth = <0x40>;
		};
For Axi CAN Dts file:
	axi_can_0: axi-can@40000000 {
			compatible = "xlnx,axi-can-1.00.a";
			clocks = <&clkc 0>, <&clkc 1>;
			clock-names = "can_clk","s_axi_aclk" ;
			reg = <0x40000000 0x10000>;
			interrupt-parent = <&intc>;
			interrupts = <0 59 1>;
			tx-fifo-depth = <0x40>;
			rx-fifo-depth = <0x40>;
		};

Add xilinx CAN device tree bindings documentation
can: Add xilinx CAN device tree bindings documentation

Add xilinx CAN bindings documentation.

Signed-off-by: Kedareswara rao Appana <43034f06b1941b15bbb27630d0367a1723aa7d6e@xilinx.com>
Acked-by: Rob Herring <fbb37eacae100e13076d5c4b46f06cfa4d6fa9f8@kernel.org>
Signed-off-by: Marc Kleine-Budde <4a0ea1158d3cc63151119c05b1bff00c0bdbf421@pengutronix.de>
