linux/include/linux/i2c-mux-gpio.h
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   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 */
  31struct 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 */
  44
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