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Overlay for GalaxyCore GC9A01 displays (#5086)
This includes an overlay for easy use of displays based on GalaxyCore's GC9A01 single chip driver, attaching them on `spi0` as `fb1` framebuffer.
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| /* | ||
| Device Tree overlay for Galaxycore GC9A01A single chip driver | ||
| for use on SPI TFT LCD, 240x240 65K RGB | ||
| Based on Galaxycore's GC9A01A datasheet Rev.1.0 (2019/07/02) | ||
| Copyright (C) 2022, Julianno F. C. Silva (@juliannojungle) | ||
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| This program is free software: you can redistribute it and/or modify | ||
| it under the terms of the GNU Affero General Public License as published | ||
| by the Free Software Foundation, either version 3 of the License, or | ||
| (at your option) any later version. | ||
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| This program is distributed in the hope that it will be useful, | ||
| but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | ||
| GNU Affero General Public License for more details. | ||
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| You should have received a copy of the GNU Affero General Public License | ||
| along with this program. If not, see <https://www.gnu.org/licenses/agpl-3.0.html>. | ||
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| Init sequence partially based on Waveshare team's Arduino LCD_Driver V1.0 (2020/12/09). | ||
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| Permission is hereby granted, free of UBYTEge, to any person obtaining a copy | ||
| of this software and associated documnetation files (the "Software"), to deal | ||
| in the Software without restriction, including without limitation the rights | ||
| to use, copy, modify, merge, publish, distribute, sublicense, and/or sell | ||
| copies of the Software, and to permit persons to whom the Software is | ||
| furished to do so, subject to the following conditions: | ||
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| The above copyright notice and this permission notice shall be included in | ||
| all copies or substantial portions of the Software. | ||
| */ | ||
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| /dts-v1/; | ||
| /plugin/; | ||
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| / { | ||
| compatible = "brcm,bcm2835"; | ||
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| fragment@0 { | ||
| target = <&spi0>; | ||
| __overlay__ { | ||
| status = "okay"; | ||
| spidev@0 { | ||
| status = "disabled"; | ||
| }; | ||
| }; | ||
| }; | ||
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| fragment@1 { | ||
| target = <&gpio>; | ||
| __overlay__ { | ||
| gc9a01_pins: gc9a01_pins { | ||
| brcm,pins = <25 27>; | ||
| brcm,function = <1 1>; /* out */ | ||
| brcm,pull = <0 0>; /* none */ | ||
| }; | ||
| }; | ||
| }; | ||
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| fragment@2 { | ||
| target = <&spi0>; | ||
| __overlay__ { | ||
| /* needed to avoid dtc warning */ | ||
| #address-cells = <1>; | ||
| #size-cells = <0>; | ||
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| gc9a01: gc9a01@0 { | ||
| compatible = "ilitek,ili9340"; | ||
| reg = <0>; | ||
| pinctrl-names = "default"; | ||
| pinctrl-0 = <&gc9a01_pins>; | ||
| reset-gpios = <&gpio 27 1>; | ||
| dc-gpios = <&gpio 25 0>; | ||
| led-gpios = <&gpio 18 0>; | ||
| spi-max-frequency = <40000000>; | ||
| buswidth = <8>; | ||
| width = <240>; | ||
| height = <240>; | ||
| rotate = <0>; | ||
| fps = <50>; | ||
| bgr; | ||
| debug = <0>; | ||
| init = < | ||
| 0x01000011 /* Sleep mode OFF */ | ||
| 0x02000078 /* Delay 120ms */ | ||
| 0x010000EF /* Inter register enable 2 */ | ||
| 0x010000EB 0x14 | ||
| /* BEGIN set inter_command HIGH */ | ||
| 0x010000FE /* Inter register enable 1 */ | ||
| 0x010000EF /* Inter register enable 2 */ | ||
| /* END set inter_command HIGH */ | ||
| 0x010000EB 0x14 | ||
| 0x01000084 0x40 | ||
| 0x01000085 0xFF | ||
| 0x01000086 0xFF | ||
| 0x01000087 0xFF | ||
| 0x01000088 0x0A | ||
| 0x01000089 0x21 | ||
| 0x0100008A 0x00 | ||
| 0x0100008B 0x80 | ||
| 0x0100008C 0x01 | ||
| 0x0100008D 0x01 | ||
| 0x0100008E 0xFF | ||
| 0x0100008F 0xFF | ||
| 0x010000B6 0x00 0x00 /* Display function control */ | ||
| 0x01000036 0x08 /* Memory access control */ | ||
| 0x0100003A 0x05 /* Pixel format */ | ||
| 0x01000090 0x08 0x08 0x08 0x08 | ||
| 0x010000BD 0x06 | ||
| 0x010000BC 0x00 | ||
| 0x010000FF 0x60 0x01 0x04 | ||
| 0x010000C3 0x13 /* Voltage regulator 1a */ | ||
| 0x010000C4 0x13 /* Voltage regulator 1b */ | ||
| 0x010000C9 0x22 /* Voltage regulator 2a */ | ||
| 0x010000BE 0x11 | ||
| 0x010000E1 0x10 0x0E | ||
| 0x010000DF 0x21 0x0c 0x02 | ||
| 0x010000F0 0x45 0x09 0x08 0x08 0x26 0x2A /* Set gamma1 */ | ||
| 0x010000F1 0x43 0x70 0x72 0x36 0x37 0x6F /* Set gamma2 */ | ||
| 0x010000F2 0x45 0x09 0x08 0x08 0x26 0x2A /* Set gamma3 */ | ||
| 0x010000F3 0x43 0x70 0x72 0x36 0x37 0x6F /* Set gamma4 */ | ||
| 0x010000ED 0x1B 0x0B | ||
| 0x010000AE 0x77 | ||
| 0x010000CD 0x63 | ||
| 0x01000070 0x07 0x07 0x04 0x0E 0x0F 0x09 0x07 0x08 0x03 | ||
| 0x010000E8 0x34 /* Frame rate */ | ||
| 0x01000062 0x18 0x0D 0x71 0xED 0x70 0x70 0x18 0x0F 0x71 0xEF 0x70 0x70 | ||
| 0x01000063 0x18 0x11 0x71 0xF1 0x70 0x70 0x18 0x13 0x71 0xF3 0x70 0x70 | ||
| 0x01000064 0x28 0x29 0xF1 0x01 0xF1 0x00 0x07 | ||
| 0x01000066 0x3C 0x00 0xCD 0x67 0x45 0x45 0x10 0x00 0x00 0x00 | ||
| 0x01000067 0x00 0x3C 0x00 0x00 0x00 0x01 0x54 0x10 0x32 0x98 | ||
| 0x01000074 0x10 0x85 0x80 0x00 0x00 0x4E 0x00 | ||
| 0x01000098 0x3e 0x07 | ||
| 0x01000035 /* Tearing effect ON */ | ||
| 0x01000021 /* Display inversion ON */ | ||
| 0x01000011 /* Sleep mode OFF */ | ||
| 0x0200000C /* Delay 12ms */ | ||
| 0x01000029 /* Display ON */ | ||
| 0x02000014 /* Delay 20ms */ | ||
| >; | ||
| }; | ||
| }; | ||
| }; | ||
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| __overrides__ { | ||
| speed = <&gc9a01>,"spi-max-frequency:0"; | ||
| rotate = <&gc9a01>,"rotate:0"; | ||
| width = <&gc9a01>,"width:0"; | ||
| height = <&gc9a01>,"height:0"; | ||
| fps = <&gc9a01>,"fps:0"; | ||
| debug = <&gc9a01>,"debug:0"; | ||
| }; | ||
| }; |