diff options
Diffstat (limited to 'Documentation/i2c/muxes/i2c-mux-gpio')
| -rw-r--r-- | Documentation/i2c/muxes/i2c-mux-gpio | 20 |
1 files changed, 10 insertions, 10 deletions
diff --git a/Documentation/i2c/muxes/i2c-mux-gpio b/Documentation/i2c/muxes/i2c-mux-gpio index d4d91a53fc39..7a8d7d261632 100644 --- a/Documentation/i2c/muxes/i2c-mux-gpio +++ b/Documentation/i2c/muxes/i2c-mux-gpio @@ -1,11 +1,11 @@ -Kernel driver i2c-gpio-mux +Kernel driver i2c-mux-gpio Author: Peter Korsgaard <peter.korsgaard@barco.com> Description ----------- -i2c-gpio-mux is an i2c mux driver providing access to I2C bus segments +i2c-mux-gpio is an i2c mux driver providing access to I2C bus segments from a master I2C bus and a hardware MUX controlled through GPIO pins. E.G.: @@ -26,16 +26,16 @@ according to the settings of the GPIO pins 1..N. Usage ----- -i2c-gpio-mux uses the platform bus, so you need to provide a struct +i2c-mux-gpio uses the platform bus, so you need to provide a struct platform_device with the platform_data pointing to a struct -gpio_i2cmux_platform_data with the I2C adapter number of the master +i2c_mux_gpio_platform_data with the I2C adapter number of the master bus, the number of bus segments to create and the GPIO pins used -to control it. See include/linux/i2c-gpio-mux.h for details. +to control it. See include/linux/i2c-mux-gpio.h for details. E.G. something like this for a MUX providing 4 bus segments controlled through 3 GPIO pins: -#include <linux/i2c-gpio-mux.h> +#include <linux/i2c-mux-gpio.h> #include <linux/platform_device.h> static const unsigned myboard_gpiomux_gpios[] = { @@ -46,7 +46,7 @@ static const unsigned myboard_gpiomux_values[] = { 0, 1, 2, 3 }; -static struct gpio_i2cmux_platform_data myboard_i2cmux_data = { +static struct i2c_mux_gpio_platform_data myboard_i2cmux_data = { .parent = 1, .base_nr = 2, /* optional */ .values = myboard_gpiomux_values, @@ -57,7 +57,7 @@ static struct gpio_i2cmux_platform_data myboard_i2cmux_data = { }; static struct platform_device myboard_i2cmux = { - .name = "i2c-gpio-mux", + .name = "i2c-mux-gpio", .id = 0, .dev = { .platform_data = &myboard_i2cmux_data, @@ -66,14 +66,14 @@ static struct platform_device myboard_i2cmux = { If you don't know the absolute GPIO pin numbers at registration time, you can instead provide a chip name (.chip_name) and relative GPIO pin -numbers, and the i2c-gpio-mux driver will do the work for you, +numbers, and the i2c-mux-gpio driver will do the work for you, including deferred probing if the GPIO chip isn't immediately available. Device Registration ------------------- -When registering your i2c-gpio-mux device, you should pass the number +When registering your i2c-mux-gpio device, you should pass the number of any GPIO pin it uses as the device ID. This guarantees that every instance has a different ID. |