PB-SPI1-ETH-CLICK.dts

/*
 * Copyright (C) 2017 Robert Nelson <robertcnelson@gmail.com>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 *
 * https://www.mikroe.com/eth-click
 * https://download.mikroe.com/documents/add-on-boards/click/eth/eth-click-manual-v100.pdf
 */

/dts-v1/;
/plugin/;

#include <dt-bindings/gpio/gpio.h>
#include <dt-bindings/pinctrl/am33xx.h>
#include <dt-bindings/interrupt-controller/irq.h>

/ {
	/*
	 * Helper to show loaded overlays under: /proc/device-tree/chosen/overlays/
	 */
	fragment@0 {
		target-path="/";
		__overlay__ {

			chosen {
				overlays {
					PB-SPI1-ETH-CLICK = __TIMESTAMP__;
				};
			};
		};
	};

	/*
	 * Free up the pins used by the cape from the pinmux helpers.
	 */
	fragment@1 {
		target = <&ocp>;
		__overlay__ {
			P1_34_pinmux { status = "disabled"; };
			P2_25_pinmux { status = "disabled"; };	/* MOSI - gpio1_9 */
			P2_27_pinmux { status = "disabled"; };	/* MISO - gpio1_8 */
			P2_29_pinmux { status = "disabled"; };	/* CLK - gpio0_7 */
			P2_31_pinmux { status = "disabled"; };	/* CS - gpio0_19 */
			P2_33_pinmux { status = "disabled"; };
		};
	};

	fragment@2 {
		target = <&am33xx_pinmux>;
		__overlay__ {
			enc28j60_pins: pinmux_enc28j60_pins {
				pinctrl-single,pins = <
					AM33XX_IOPAD(0x0828, PIN_INPUT | MUX_MODE7 ) /* (T11) gpmc_ad10.gpio0[26] INT */
					AM33XX_IOPAD(0x0834, PIN_INPUT | MUX_MODE7 ) /* (R12) gpmc_ad13.gpio1[13] RESET */
				>;
			};

			pb_spi1_pins: pinmux_pb_spi1_pins {
				pinctrl-single,pins = <
					AM33XX_IOPAD(0x0964, PIN_INPUT | MUX_MODE4 ) /* (C18) eCAP0_in_PWM0_out.spi1_sclk */
					AM33XX_IOPAD(0x0968, PIN_INPUT | MUX_MODE4 ) /* (E18) uart0_ctsn.spi1_d0 */
					AM33XX_IOPAD(0x096c, PIN_INPUT | MUX_MODE4 ) /* (E17) uart0_rtsn.spi1_d1 */
					AM33XX_IOPAD(0x09b0, PIN_INPUT | MUX_MODE4 ) /* (A15) xdma_event_intr0.spi1_cs1 */
				>;
			};
		};
	};

	fragment@3 {
		target = <&spi1>;
		__overlay__ {
			status = "okay";
			pinctrl-names = "default";
			pinctrl-0 = <&pb_spi1_pins>;

			channel@0{ status = "disabled"; };
			channel@1{ status = "disabled"; };
		};
	};

	fragment@4 {
		target = <&spi1>;
		__overlay__ {
			#address-cells = <1>;
			#size-cells = <0>;

			enc28j60: ethernet@1 {
				compatible = "microchip,enc28j60";
				pinctrl-names = "default";
				pinctrl-0 = <&enc28j60_pins>;
				reg = <0x1>;
				interrupt-parent = <&gpio0>;
				interrupts = <26 IRQ_TYPE_EDGE_FALLING>;
				spi-max-frequency = <16000000>;
				local-mac-address = [ 00 00 00 00 00 00 ];
			};
		};
	};
};