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 VT1632 DVI Transmitter 7 */ 8 9 #include <linux/slab.h> 10 #include "via_aux.h" 11 12 13 static const char *name = "VT1632 DVI Transmitter"; 14 15 16 static void probe(struct via_aux_bus *bus, u8 addr) 17 { 18 struct via_aux_drv drv = { 19 .bus = bus, 20 .addr = addr, 21 .name = name}; 22 /* check vendor id and device id */ 23 const u8 id[] = {0x06, 0x11, 0x92, 0x31}, 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 at address 0x%x\n", name, addr); 30 via_aux_add(&drv); 31 } 32 33 void via_aux_vt1632_probe(struct via_aux_bus *bus) 34 { 35 u8 i; 36 37 for (i = 0x08; i <= 0x0F; i++) 38 probe(bus, i); 39 } 40