1 /*
2 * Copyright 2011 Florian Tobias Schandinat <FlorianSchandinat@gmx.de>
3 *
4 * This program is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU General Public
6 * License as published by the Free Software Foundation;
7 * either version 2, or (at your option) any later version.
8 *
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTIES OR REPRESENTATIONS; without even
11 * the implied warranty of MERCHANTABILITY or FITNESS FOR
12 * A PARTICULAR PURPOSE.See the GNU General Public License
13 * for more details.
14 *
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, write to the Free Software
17 * Foundation, Inc.,
18 * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
19 */
20 /*
21 * driver for VIA VT1636 LVDS Transmitter
22 */
23
24 #include <linux/slab.h>
25 #include "via_aux.h"
26
27
28 static const char *name = "VT1636 LVDS Transmitter";
29
30
via_aux_vt1636_probe(struct via_aux_bus * bus)31 void via_aux_vt1636_probe(struct via_aux_bus *bus)
32 {
33 struct via_aux_drv drv = {
34 .bus = bus,
35 .addr = 0x40,
36 .name = name};
37 /* check vendor id and device id */
38 const u8 id[] = {0x06, 0x11, 0x45, 0x33}, len = ARRAY_SIZE(id);
39 u8 tmp[len];
40
41 if (!via_aux_read(&drv, 0x00, tmp, len) || memcmp(id, tmp, len))
42 return;
43
44 printk(KERN_INFO "viafb: Found %s\n", name);
45 via_aux_add(&drv);
46 }
47