arch/arm/mach-pxa/hx4700/hx4700_bl.c

   1 /*
   2  * LCD backlight support for iPAQ HX4700
   3  *
   4  * Copyright (c) 2005 Ian Molton
   5  * Copyright (c) 2005 SDG Systems, LLC
   6  * Copyright (c) 2006 Todd Blumer <todd@sdgsystems.com>
   7  *
   8  * This file is subject to the terms and conditions of the GNU General Public
   9  * License.  See the file COPYING in the main directory of this archive for
  10  * more details.
  11  *
  12  * 2006-10-07    Anton Vorontsov <cbou@mail.ru>
  13  * Convert backlight control code to use corgi-bl driver.
  14  */
  15
  16 #include <linux/platform_device.h>
  17 #include <linux/corgi_bl.h>
  18 #include <asm/arch/hardware.h>
  19 #include <asm/arch/pxa-regs.h>
  20
  21 static
  22 void hx4700_set_bl_intensity(int intensity)
  23 {
  24         if (intensity < 7) intensity = 0;
  25         PWM_CTRL1 = 1;
  26         PWM_PERVAL1 = 0xC8;
  27         PWM_PWDUTY1 = intensity;
  28         return;
  29 }
  30
  31 static
  32 struct corgibl_machinfo hx4700_bl_machinfo = {
  33         .max_intensity = 0xC8,
  34         .default_intensity = 0xC8/4,
  35         .limit_mask = 0xFF,
  36         .set_bl_intensity = hx4700_set_bl_intensity
  37 };
  38
  39 struct platform_device hx4700_bl = {
  40         .name = "corgi-bl",
  41         .dev = {
  42                 .platform_data = &hx4700_bl_machinfo
  43         }
  44 };