diff options
Diffstat (limited to 'include/linux/i2c-mux-gpio.h')
| -rw-r--r-- | include/linux/i2c-mux-gpio.h | 43 |
1 files changed, 43 insertions, 0 deletions
diff --git a/include/linux/i2c-mux-gpio.h b/include/linux/i2c-mux-gpio.h new file mode 100644 index 000000000..440610820 --- /dev/null +++ b/include/linux/i2c-mux-gpio.h @@ -0,0 +1,43 @@ +/* + * 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 */ |