include/linux/gpio-fan.h

   1 /*
   2  * include/linux/gpio-fan.h
   3  *
   4  * Platform data structure for GPIO fan driver
   5  *
   6  * This file is licensed under the terms of the GNU General Public
   7  * License version 2.  This program is licensed "as is" without any
   8  * warranty of any kind, whether express or implied.
   9  */
  10
  11 #ifndef __LINUX_GPIO_FAN_H
  12 #define __LINUX_GPIO_FAN_H
  13
  14 struct gpio_fan_alarm {
  15         unsigned        gpio;
  16         unsigned        active_low;
  17 };
  18
  19 struct gpio_fan_speed {
  20         int rpm;
  21         int ctrl_val;
  22 };
  23
  24 struct gpio_fan_platform_data {
  25         int                     num_ctrl;
  26         unsigned                *ctrl;  /* fan control GPIOs. */
  27         struct gpio_fan_alarm   *alarm; /* fan alarm GPIO. */
  28         /*
  29          * Speed conversion array: rpm from/to GPIO bit field.
  30          * This array _must_ be sorted in ascending rpm order.
  31          */
  32         int                     num_speed;
  33         struct gpio_fan_speed   *speed;
  34 };
  35
  36 #endif /* __LINUX_GPIO_FAN_H */