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>
25 #define DRVNAME "fb_ili9481"
29 static int default_init_sequence[] = {
31 /* SLP_OUT - Sleep out */
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. */
47 -1, 0xC8, 0x00, 0x32, 0x36, 0x45, 0x06, 0x16,
48 0x37, 0x75, 0x77, 0x54, 0x0C, 0x00,
54 static void set_addr_win(struct fbtft_par *par, int xs, int ys, int xe, int ye)
57 write_reg(par, 0x2a, xs >> 8, xs & 0xff, xe >> 8, xe & 0xff);
60 write_reg(par, 0x2b, ys >> 8, ys & 0xff, ye >> 8, ye & 0xff);
69 static int set_var(struct fbtft_par *par)
71 switch (par->info->var.rotate) {
73 write_reg(par, 0x36, ROWxCOL | HFLIP | VFLIP | (par->bgr << 3));
76 write_reg(par, 0x36, VFLIP | (par->bgr << 3));
79 write_reg(par, 0x36, ROWxCOL | (par->bgr << 3));
82 write_reg(par, 0x36, HFLIP | (par->bgr << 3));
89 static struct fbtft_display display = {
93 .init_sequence = default_init_sequence,
95 .set_addr_win = set_addr_win,
100 FBTFT_REGISTER_DRIVER(DRVNAME, "ilitek,ili9481", &display);
102 MODULE_ALIAS("spi:" DRVNAME);
103 MODULE_ALIAS("platform:" DRVNAME);
104 MODULE_ALIAS("spi:ili9481");
105 MODULE_ALIAS("platform:ili9481");
107 MODULE_DESCRIPTION("FB driver for the ILI9481 LCD Controller");
108 MODULE_AUTHOR("Petr Olivka");
109 MODULE_LICENSE("GPL");