Linux Kernel  3.7.1
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via_aux_vt1636.c
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1 /*
2  * Copyright 2011 Florian Tobias Schandinat <[email protected]>
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 
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 }