1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3  * Copyright 2011 Florian Tobias Schandinat <FlorianSchandinat@gmx.de>
4  */
5 /*
6  * driver for VIA VT1636 LVDS Transmitter
7  */
8 
9 #include <linux/slab.h>
10 #include "via_aux.h"
11 
12 
13 static const char *name = "VT1636 LVDS Transmitter";
14 
15 
via_aux_vt1636_probe(struct via_aux_bus * bus)16 void via_aux_vt1636_probe(struct via_aux_bus *bus)
17 {
18 	struct via_aux_drv drv = {
19 		.bus	=	bus,
20 		.addr	=	0x40,
21 		.name	=	name};
22 	/* check vendor id and device id */
23 	const u8 id[] = {0x06, 0x11, 0x45, 0x33}, len = ARRAY_SIZE(id);
24 	u8 tmp[ARRAY_SIZE(id)];
25 
26 	if (!via_aux_read(&drv, 0x00, tmp, len) || memcmp(id, tmp, len))
27 		return;
28 
29 	printk(KERN_INFO "viafb: Found %s\n", name);
30 	via_aux_add(&drv);
31 }
32