include/linux/i2c-mux-gpio.h

   1 /*
   2  * i2c-mux-gpio 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_I2C_MUX_GPIO_H
  12 #define _LINUX_I2C_MUX_GPIO_H
  13
  14 /* MUX has no specific idle mode */
  15 #define I2C_MUX_GPIO_NO_IDLE    ((unsigned)-1)
  16
  17 /**
  18  * struct i2c_mux_gpio_platform_data - Platform-dependent data for i2c-mux-gpio
  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  * @classes: Optional I2C auto-detection classes
  25  * @gpio_chip: Optional GPIO chip name; if set, GPIO pin numbers are given
  26  *      relative to the base GPIO number of that chip
  27  * @gpios: Array of GPIO numbers used to control MUX
  28  * @n_gpios: Number of GPIOs used to control MUX
  29  * @idle: Bitmask to write to MUX when idle or GPIO_I2CMUX_NO_IDLE if not used
  30  */
  31 struct i2c_mux_gpio_platform_data {
  32         int parent;
  33         int base_nr;
  34         const unsigned *values;
  35         int n_values;
  36         const unsigned *classes;
  37         char *gpio_chip;
  38         const unsigned *gpios;
  39         int n_gpios;
  40         unsigned idle;
  41 };
  42
  43 #endif /* _LINUX_I2C_MUX_GPIO_H */