Commit fce449f5 authored by Trevor Woerner's avatar Trevor Woerner Committed by Jernej Skrabec
Browse files

riscv: dts: nezha-d1: add gpio-line-names 



Add descriptive names so users can associate specific lines with their
respective pins on the 40-pin header according to the schematics.

Signed-off-by: default avatarTrevor Woerner <twoerner@gmail.com>
Link: http://dl.linux-sunxi.org/D1/D1_Nezha_development_board_schematic_diagram_20210224.pdf


Acked-by: default avatarConor Dooley <conor.dooley@microchip.com>
Link: https://lore.kernel.org/r/20230210025132.36605-2-twoerner@gmail.com


Signed-off-by: default avatarJernej Skrabec <jernej.skrabec@gmail.com>
parent 23ca1dd4

arch/riscv/boot/dts/allwinner/sun20i-d1-nezha.dts

+72 −0
Original line number Diff line number Diff line 
// SPDX-License-Identifier: (GPL-2.0+ or MIT)

// Copyright (C) 2021-2022 Samuel Holland <samuel@sholland.org>



/*

 * gpio line names

 *

 * The Nezha-D1 has a 40-pin IO header. Some of these pins are routed

 * directly to pads on the SoC, others come from an 8-bit pcf857x IO

 * expander. Therefore, these line names are specified in two places:

 * one set for the pcf857x, and one set for the pio controller.

 *

 * Lines which are routed to the 40-pin header are named as follows:

 *	<pin#> [<pin name>]

 * where:

 *	<pin#>		is the actual pin number of the 40-pin header

 *	<pin name>	is the name of the pin by function/gpio#

 *

 * For details regarding pin numbers and names see the schematics (under

 * "IO EXPAND"):

 * http://dl.linux-sunxi.org/D1/D1_Nezha_development_board_schematic_diagram_20210224.pdf

 */



#include <dt-bindings/gpio/gpio.h>

#include <dt-bindings/input/input.h>
@@ -90,6 +109,15 @@ pcf8574a: gpio@38 { 
		gpio-controller;

		#gpio-cells = <2>;

		#interrupt-cells = <2>;

		gpio-line-names =

			"pin13 [gpio8]",

			"pin16 [gpio10]",

			"pin18 [gpio11]",

			"pin26 [gpio17]",

			"pin22 [gpio14]",

			"pin28 [gpio19]",

			"pin37 [gpio23]",

			"pin11 [gpio6]";

	};

};
@@ -164,3 +192,47 @@ &usbphy { 
	usb1_vbus-supply = <&reg_vcc>;

	status = "okay";

};



&pio {

	gpio-line-names =

		/* Port A */

		"", "", "", "", "", "", "", "",

		"", "", "", "", "", "", "", "",

		"", "", "", "", "", "", "", "",

		"", "", "", "", "", "", "", "",

		/* Port B */

		"pin5 [gpio2/twi2-sck]",

		"pin3 [gpio1/twi2-sda]",

		"",

		"pin38 [gpio24/i2s2-din]",

		"pin40 [gpio25/i2s2-dout]",

		"pin12 [gpio7/i2s-clk]",

		"pin35 [gpio22/i2s2-lrck]",

		"",

		"pin8 [gpio4/uart0-txd]",

		"pin10 [gpio5/uart0-rxd]",

		"",

		"",

		"pin15 [gpio9]",

		"", "", "", "",

		"", "", "", "", "", "", "", "",

		"", "", "", "", "", "", "", "",

		/* Port C */

		"",

		"pin31 [gpio21]",

		"", "", "", "", "", "",

		"", "", "", "", "", "", "", "",

		"", "", "", "", "", "", "", "",

		"", "", "", "", "", "", "", "",

		/* Port D */

		"", "", "", "", "", "", "", "",

		"", "",

		"pin24 [gpio16/spi1-ce0]",

		"pin23 [gpio15/spi1-clk]",

		"pin19 [gpio12/spi1-mosi]",

		"pin21 [gpio13/spi1-miso]",

		"pin27 [gpio18/spi1-hold]",

		"pin29 [gpio20/spi1-wp]",

		"", "", "", "", "", "",

		"pin7 [gpio3/pwm]";

};