2 * FB driver for the ILI9481 LCD Controller
4 * Copyright (c) 2014 Petr Olivka
5 * Copyright (c) 2013 Noralf Tronnes
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 2 of the License, or
10 * (at your option) any later version.
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
18 #include <linux/module.h>
19 #include <linux/kernel.h>
20 #include <linux/init.h>
21 #include <linux/delay.h>
22 #include <video/mipi_display.h>
26 #define DRVNAME "fb_ili9481"
30 static const s16 default_init_sequence[] = {
31 /* SLP_OUT - Sleep out */
32 -1, MIPI_DCS_EXIT_SLEEP_MODE,
35 -1, 0xD0, 0x07, 0x42, 0x18,
37 -1, 0xD1, 0x00, 0x07, 0x10,
38 /* Power setting for norm. mode */
40 /* Panel driving setting */
41 -1, 0xC0, 0x10, 0x3B, 0x00, 0x02, 0x11,
42 /* Frame rate & inv. */
45 -1, MIPI_DCS_SET_PIXEL_FORMAT, 0x55,
47 -1, 0xC8, 0x00, 0x32, 0x36, 0x45, 0x06, 0x16,
48 0x37, 0x75, 0x77, 0x54, 0x0C, 0x00,
50 -1, MIPI_DCS_SET_DISPLAY_ON,
54 static void set_addr_win(struct fbtft_par *par, int xs, int ys, int xe, int ye)
56 write_reg(par, MIPI_DCS_SET_COLUMN_ADDRESS,
57 xs >> 8, xs & 0xff, xe >> 8, xe & 0xff);
59 write_reg(par, MIPI_DCS_SET_PAGE_ADDRESS,
60 ys >> 8, ys & 0xff, ye >> 8, ye & 0xff);
62 write_reg(par, MIPI_DCS_WRITE_MEMORY_START);
67 #define ROW_X_COL 0x20
68 static int set_var(struct fbtft_par *par)
70 switch (par->info->var.rotate) {
72 write_reg(par, MIPI_DCS_SET_ADDRESS_MODE,
73 ROW_X_COL | HFLIP | VFLIP | (par->bgr << 3));
76 write_reg(par, MIPI_DCS_SET_ADDRESS_MODE,
77 VFLIP | (par->bgr << 3));
80 write_reg(par, MIPI_DCS_SET_ADDRESS_MODE,
81 ROW_X_COL | (par->bgr << 3));
84 write_reg(par, MIPI_DCS_SET_ADDRESS_MODE,
85 HFLIP | (par->bgr << 3));
92 static struct fbtft_display display = {
96 .init_sequence = default_init_sequence,
98 .set_addr_win = set_addr_win,
103 FBTFT_REGISTER_DRIVER(DRVNAME, "ilitek,ili9481", &display);
105 MODULE_ALIAS("spi:" DRVNAME);
106 MODULE_ALIAS("platform:" DRVNAME);
107 MODULE_ALIAS("spi:ili9481");
108 MODULE_ALIAS("platform:ili9481");
110 MODULE_DESCRIPTION("FB driver for the ILI9481 LCD Controller");
111 MODULE_AUTHOR("Petr Olivka");
112 MODULE_LICENSE("GPL");