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.
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
22 #include <linux/module.h>
23 #include <linux/kernel.h>
24 #include <linux/init.h>
25 #include <linux/delay.h>
29 #define DRVNAME "fb_ili9481"
33 static int default_init_sequence[] = {
35 /* SLP_OUT - Sleep out */
39 -1, 0xD0, 0x07, 0x42, 0x18,
41 -1, 0xD1, 0x00, 0x07, 0x10,
42 /* Power setting for norm. mode */
44 /* Panel driving setting */
45 -1, 0xC0, 0x10, 0x3B, 0x00, 0x02, 0x11,
46 /* Frame rate & inv. */
51 -1, 0xC8, 0x00, 0x32, 0x36, 0x45, 0x06, 0x16,
52 0x37, 0x75, 0x77, 0x54, 0x0C, 0x00,
58 static void set_addr_win(struct fbtft_par *par, int xs, int ys, int xe, int ye)
60 fbtft_par_dbg(DEBUG_SET_ADDR_WIN, par,
61 "%s(xs=%d, ys=%d, xe=%d, ye=%d)\n", __func__, xs, ys, xe, ye);
64 write_reg(par, 0x2a, xs >> 8, xs & 0xff, xe >> 8, xe & 0xff);
67 write_reg(par, 0x2b, ys >> 8, ys & 0xff, ye >> 8, ye & 0xff);
76 static int set_var(struct fbtft_par *par)
78 fbtft_par_dbg(DEBUG_INIT_DISPLAY, par, "%s()\n", __func__);
80 switch (par->info->var.rotate) {
82 write_reg(par, 0x36, ROWxCOL | HFLIP | VFLIP | (par->bgr << 3));
85 write_reg(par, 0x36, VFLIP | (par->bgr << 3));
88 write_reg(par, 0x36, ROWxCOL | (par->bgr << 3));
91 write_reg(par, 0x36, HFLIP | (par->bgr << 3));
98 static struct fbtft_display display = {
102 .init_sequence = default_init_sequence,
104 .set_addr_win = set_addr_win,
108 FBTFT_REGISTER_DRIVER(DRVNAME, "ilitek,ili9481", &display);
110 MODULE_ALIAS("spi:" DRVNAME);
111 MODULE_ALIAS("platform:" DRVNAME);
112 MODULE_ALIAS("spi:ili9481");
113 MODULE_ALIAS("platform:ili9481");
115 MODULE_DESCRIPTION("FB driver for the ILI9481 LCD Controller");
116 MODULE_AUTHOR("Petr Olivka");
117 MODULE_LICENSE("GPL");