include/linux/atmel-pwm-bl.h

   1 /*
   2  * Copyright (C) 2007 Atmel Corporation
   3  *
   4  * Driver for the AT32AP700X PS/2 controller (PSIF).
   5  *
   6  * This program is free software; you can redistribute it and/or modify it
   7  * under the terms of the GNU General Public License version 2 as published
   8  * by the Free Software Foundation.
   9  */
  10
  11 #ifndef __INCLUDE_ATMEL_PWM_BL_H
  12 #define __INCLUDE_ATMEL_PWM_BL_H
  13
  14 /**
  15  * struct atmel_pwm_bl_platform_data
  16  * @pwm_channel: which PWM channel in the PWM module to use.
  17  * @pwm_frequency: PWM frequency to generate, the driver will try to be as
  18  *      close as the prescaler allows.
  19  * @pwm_compare_max: value to use in the PWM channel compare register.
  20  * @pwm_duty_max: maximum duty cycle value, must be less than or equal to
  21  *      pwm_compare_max.
  22  * @pwm_duty_min: minimum duty cycle value, must be less than pwm_duty_max.
  23  * @pwm_active_low: set to one if the low part of the PWM signal increases the
  24  *      brightness of the backlight.
  25  * @gpio_on: GPIO line to control the backlight on/off, set to -1 if not used.
  26  * @on_active_low: set to one if the on/off signal is on when GPIO is low.
  27  *
  28  * This struct must be added to the platform device in the board code. It is
  29  * used by the atmel-pwm-bl driver to setup the GPIO to control on/off and the
  30  * PWM device.
  31  */
  32 struct atmel_pwm_bl_platform_data {
  33         unsigned int pwm_channel;
  34         unsigned int pwm_frequency;
  35         unsigned int pwm_compare_max;
  36         unsigned int pwm_duty_max;
  37         unsigned int pwm_duty_min;
  38         unsigned int pwm_active_low;
  39         int gpio_on;
  40         unsigned int on_active_low;
  41 };
  42
  43 #endif /* __INCLUDE_ATMEL_PWM_BL_H */