linux/include/linux/atmel-pwm-bl.h
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   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 */
  32struct 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 */
  44
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