release/src-rt-6.x.4708/linux/linux-2.6.36/arch/mips/cobalt/buttons.c

   1 /*
   2  *  Cobalt buttons platform device.
   3  *
   4  *  Copyright (C) 2007  Yoichi Yuasa <yuasa@linux-mips.org>
   5  *
   6  *  This program is free software; you can redistribute it and/or modify
   7  *  it under the terms of the GNU General Public License as published by
   8  *  the Free Software Foundation; either version 2 of the License, or
   9  *  (at your option) any later version.
  10  *
  11  *  This program is distributed in the hope that it will be useful,
  12  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  *  GNU General Public License for more details.
  15  *
  16  *  You should have received a copy of the GNU General Public License
  17  *  along with this program; if not, write to the Free Software
  18  *  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
  19  */
  20
  21 #include <linux/platform_device.h>
  22 #include <linux/errno.h>
  23 #include <linux/init.h>
  24
  25 static struct resource cobalt_buttons_resource __initdata = {
  26         .start  = 0x1d000000,
  27         .end    = 0x1d000003,
  28         .flags  = IORESOURCE_MEM,
  29 };
  30
  31 static __init int cobalt_add_buttons(void)
  32 {
  33         struct platform_device *pd;
  34         int error;
  35
  36         pd = platform_device_alloc("Cobalt buttons", -1);
  37         if (!pd)
  38                 return -ENOMEM;
  39
  40         error = platform_device_add_resources(pd, &cobalt_buttons_resource, 1);
  41         if (error)
  42                 goto err_free_device;
  43
  44         error = platform_device_add(pd);
  45         if (error)
  46                 goto err_free_device;
  47
  48         return 0;
  49
  50  err_free_device:
  51         platform_device_put(pd);
  52         return error;
  53 }
  54 device_initcall(cobalt_add_buttons);