drivers/video/fbdev/via/via_aux_ch7301.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  * Copyright 2011 Florian Tobias Schandinat <FlorianSchandinat@gmx.de>
   4  */
   5 /*
   6  * driver for Chrontel CH7301 DVI Transmitter
   7  */
   8
   9 #include <linux/slab.h>
  10 #include "via_aux.h"
  11
  12
  13 static const char *name = "CH7301 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         u8 tmp;
  23
  24         if (!via_aux_read(&drv, 0x4B, &tmp, 1) || tmp != 0x17)
  25                 return;
  26
  27         printk(KERN_INFO "viafb: Found %s at address 0x%x\n", name, addr);
  28         via_aux_add(&drv);
  29 }
  30
  31 void via_aux_ch7301_probe(struct via_aux_bus *bus)
  32 {
  33         probe(bus, 0x75);
  34         probe(bus, 0x76);
  35 }