ARM: dts: imx7-colibri: add MCP2515 CAN controller

The Colibri Evaluation Carrier Board provides a MCP2515 CAN
controller connected via SPI. Note that the i.MX 7 provides
an internal CAN controller which is much better suited for CAN
operations. Using the MCP2515 with a Colibri iMX7 module is
mainly useful to test the SPI interface.

Signed-off-by: Stefan Agner <[e-mail]>
Reviewed-by: Fabio Estevam <[e-mail]>
Signed-off-by: Shawn Guo <[e-mail]>

arch/arm/boot/dts/imx7-colibri-eval-v3.dtsi

···
 		stdout-path = "serial0:115200n8";
 	};
 
+	/* fixed crystal dedicated to mpc258x */
+	clk16m: clk16m {
+		compatible = "fixed-clock";
+		#clock-cells = <0>;
+		clock-frequency = <16000000>;
+	};
+
 	panel: panel {
 		compatible = "edt,et057090dhu";
 		backlight = <&bl>;
···
 
 &adc2 {
 	status = "okay";
+};
+
+&ecspi3 {
+	status = "okay";
+
+	mcp2515: can@0 {
+		compatible = "microchip,mcp2515";
+		pinctrl-names = "default";
+		pinctrl-0 = <&pinctrl_can_int>;
+		reg = <0>;
+		clocks = <&clk16m>;
+		interrupt-parent = <&gpio5>;
+		interrupts = <2 IRQ_TYPE_EDGE_FALLING>;
+		spi-max-frequency = <10000000>;
+		vdd-supply = <&reg_3v3>;
+		xceiver-supply = <&reg_5v0>;
+		status = "okay";
+	};
 };
 
 &fec1 {

arch/arm/boot/dts/imx7-colibri.dtsi

···
 	cpu-supply = <&reg_DCDC2>;
 };
 
+&ecspi3 {
+	pinctrl-names = "default";
+	pinctrl-0 = <&pinctrl_ecspi3 &pinctrl_ecspi3_cs>;
+	cs-gpios = <&gpio4 11 GPIO_ACTIVE_HIGH>;
+};
+
 &fec1 {
 	pinctrl-names = "default";
 	pinctrl-0 = <&pinctrl_enet1>;
···
 		fsl,pins = <
 			MX7D_PAD_ENET1_RGMII_RD3__GPIO7_IO3	0x74 /* SODIMM 55 */
 			MX7D_PAD_ENET1_RGMII_RD2__GPIO7_IO2	0x74 /* SODIMM 63 */
-			MX7D_PAD_SD1_RESET_B__GPIO5_IO2		0X14 /* SODIMM 73 */
 			MX7D_PAD_SAI1_RX_SYNC__GPIO6_IO16	0x14 /* SODIMM 77 */
 			MX7D_PAD_EPDC_DATA09__GPIO2_IO9		0x14 /* SODIMM 89 */
 			MX7D_PAD_EPDC_DATA08__GPIO2_IO8		0x74 /* SODIMM 91 */
···
 	pinctrl_i2c1_int: i2c1-int-grp { /* PMIC / TOUCH */
 		fsl,pins = <
 			MX7D_PAD_GPIO1_IO13__GPIO1_IO13	0x79
+		>;
+	};
+
+	pinctrl_can_int: can-int-grp {
+		fsl,pins = <
+			MX7D_PAD_SD1_RESET_B__GPIO5_IO2		0X14 /* SODIMM 73 */
 		>;
 	};