include/linux/gpio-i2cmux.h

   1 /*
   2  * gpio-i2cmux interface to platform code
   3  *
   4  * Peter Korsgaard <peter.korsgaard@barco.com>
   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 version 2 as
   8  * published by the Free Software Foundation.
   9  */
  10
  11 #ifndef _LINUX_GPIO_I2CMUX_H
  12 #define _LINUX_GPIO_I2CMUX_H
  13
  14 /* MUX has no specific idle mode */
  15 #define GPIO_I2CMUX_NO_IDLE     ((unsigned)-1)
  16
  17 /**
  18  * struct gpio_i2cmux_platform_data - Platform-dependent data for gpio-i2cmux
  19  * @parent: Parent I2C bus adapter number
  20  * @base_nr: Base I2C bus number to number adapters from or zero for dynamic
  21  * @values: Array of bitmasks of GPIO settings (low/high) for each
  22  *      position
  23  * @n_values: Number of multiplexer positions (busses to instantiate)
  24  * @gpios: Array of GPIO numbers used to control MUX
  25  * @n_gpios: Number of GPIOs used to control MUX
  26  * @idle: Bitmask to write to MUX when idle or GPIO_I2CMUX_NO_IDLE if not used
  27  */
  28 struct gpio_i2cmux_platform_data {
  29         int parent;
  30         int base_nr;
  31         const unsigned *values;
  32         int n_values;
  33         const unsigned *gpios;
  34         int n_gpios;
  35         unsigned idle;
  36 };
  37
  38 #endif /* _LINUX_GPIO_I2CMUX_H */