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 int 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");