i2c-mux-gpio.h
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/*
* i2c-mux-gpio interface to platform code
*
* Peter Korsgaard <peter.korsgaard@barco.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#ifndef _LINUX_I2C_MUX_GPIO_H
#define _LINUX_I2C_MUX_GPIO_H
/* MUX has no specific idle mode */
#define I2C_MUX_GPIO_NO_IDLE ((unsigned)-1)
/**
* struct i2c_mux_gpio_platform_data - Platform-dependent data for i2c-mux-gpio
* @parent: Parent I2C bus adapter number
* @base_nr: Base I2C bus number to number adapters from or zero for dynamic
* @values: Array of bitmasks of GPIO settings (low/high) for each
* position
* @n_values: Number of multiplexer positions (busses to instantiate)
* @classes: Optional I2C auto-detection classes
* @gpio_chip: Optional GPIO chip name; if set, GPIO pin numbers are given
* relative to the base GPIO number of that chip
* @gpios: Array of GPIO numbers used to control MUX
* @n_gpios: Number of GPIOs used to control MUX
* @idle: Bitmask to write to MUX when idle or GPIO_I2CMUX_NO_IDLE if not used
*/
struct i2c_mux_gpio_platform_data {
int parent;
int base_nr;
const unsigned *values;
int n_values;
const unsigned *classes;
char *gpio_chip;
const unsigned *gpios;
int n_gpios;
unsigned idle;
};
#endif /* _LINUX_I2C_MUX_GPIO_H */