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