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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: Trevor Woerner <twoerner@gmail.com>
Link: http://dl.linux-sunxi.org/D1/D1_Nezha_development_board_schematic_diagram_20210224.pdf
Acked-by: Conor Dooley <conor.dooley@microchip.com>
Link: https://lore.kernel.org/r/20230210025132.36605-2-twoerner@gmail.com
Signed-off-by: Jernej Skrabec <jernej.skrabec@gmail.com>
This commit is contained in:
Trevor Woerner 2023-02-09 21:51:32 -05:00 committed by Jernej Skrabec
parent 23ca1dd442
commit fce449f5ba
1 changed files with 72 additions and 0 deletions
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72
arch/riscv/boot/dts/allwinner/sun20i-d1-nezha.dts
View File

@ -1,6 +1,25 @@
// 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 @@
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 @@
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]";
};