From e7065e20d9a6a8ee4a8b31ebe71d6c00a0f45354 Mon Sep 17 00:00:00 2001 From: Jean Delvare Date: Sat, 28 Apr 2012 15:32:06 +0200 Subject: i2c: Rename last mux driver to standard pattern Update the MAINTAINERS entry and all other references accordingly. Based on an original patch by Wolfram Sang. Signed-off-by: Jean Delvare Acked-by: Peter Korsgaard [wsa: fixed merge conflict due to rework in i2c_add_mux_adapter()] Signed-off-by: Wolfram Sang --- Documentation/i2c/muxes/gpio-i2cmux | 65 ------------------------------------ Documentation/i2c/muxes/i2c-mux-gpio | 65 ++++++++++++++++++++++++++++++++++++ 2 files changed, 65 insertions(+), 65 deletions(-) delete mode 100644 Documentation/i2c/muxes/gpio-i2cmux create mode 100644 Documentation/i2c/muxes/i2c-mux-gpio (limited to 'Documentation') diff --git a/Documentation/i2c/muxes/gpio-i2cmux b/Documentation/i2c/muxes/gpio-i2cmux deleted file mode 100644 index 811cd78..0000000 --- a/Documentation/i2c/muxes/gpio-i2cmux +++ /dev/null @@ -1,65 +0,0 @@ -Kernel driver gpio-i2cmux - -Author: Peter Korsgaard - -Description ------------ - -gpio-i2cmux 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.: - - ---------- ---------- Bus segment 1 - - - - - - | | SCL/SDA | |-------------- | | - | |------------| | - | | | | Bus segment 2 | | - | Linux | GPIO 1..N | MUX |--------------- Devices - | |------------| | | | - | | | | Bus segment M - | | | |---------------| | - ---------- ---------- - - - - - - -SCL/SDA of the master I2C bus is multiplexed to bus segment 1..M -according to the settings of the GPIO pins 1..N. - -Usage ------ - -gpio-i2cmux 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 -bus, the number of bus segments to create and the GPIO pins used -to control it. See include/linux/gpio-i2cmux.h for details. - -E.G. something like this for a MUX providing 4 bus segments -controlled through 3 GPIO pins: - -#include -#include - -static const unsigned myboard_gpiomux_gpios[] = { - AT91_PIN_PC26, AT91_PIN_PC25, AT91_PIN_PC24 -}; - -static const unsigned myboard_gpiomux_values[] = { - 0, 1, 2, 3 -}; - -static struct gpio_i2cmux_platform_data myboard_i2cmux_data = { - .parent = 1, - .base_nr = 2, /* optional */ - .values = myboard_gpiomux_values, - .n_values = ARRAY_SIZE(myboard_gpiomux_values), - .gpios = myboard_gpiomux_gpios, - .n_gpios = ARRAY_SIZE(myboard_gpiomux_gpios), - .idle = 4, /* optional */ -}; - -static struct platform_device myboard_i2cmux = { - .name = "gpio-i2cmux", - .id = 0, - .dev = { - .platform_data = &myboard_i2cmux_data, - }, -}; diff --git a/Documentation/i2c/muxes/i2c-mux-gpio b/Documentation/i2c/muxes/i2c-mux-gpio new file mode 100644 index 0000000..bd9b229 --- /dev/null +++ b/Documentation/i2c/muxes/i2c-mux-gpio @@ -0,0 +1,65 @@ +Kernel driver i2c-gpio-mux + +Author: Peter Korsgaard + +Description +----------- + +i2c-gpio-mux 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.: + + ---------- ---------- Bus segment 1 - - - - - + | | SCL/SDA | |-------------- | | + | |------------| | + | | | | Bus segment 2 | | + | Linux | GPIO 1..N | MUX |--------------- Devices + | |------------| | | | + | | | | Bus segment M + | | | |---------------| | + ---------- ---------- - - - - - + +SCL/SDA of the master I2C bus is multiplexed to bus segment 1..M +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 +platform_device with the platform_data pointing to a struct +gpio_i2cmux_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. + +E.G. something like this for a MUX providing 4 bus segments +controlled through 3 GPIO pins: + +#include +#include + +static const unsigned myboard_gpiomux_gpios[] = { + AT91_PIN_PC26, AT91_PIN_PC25, AT91_PIN_PC24 +}; + +static const unsigned myboard_gpiomux_values[] = { + 0, 1, 2, 3 +}; + +static struct gpio_i2cmux_platform_data myboard_i2cmux_data = { + .parent = 1, + .base_nr = 2, /* optional */ + .values = myboard_gpiomux_values, + .n_values = ARRAY_SIZE(myboard_gpiomux_values), + .gpios = myboard_gpiomux_gpios, + .n_gpios = ARRAY_SIZE(myboard_gpiomux_gpios), + .idle = 4, /* optional */ +}; + +static struct platform_device myboard_i2cmux = { + .name = "i2c-gpio-mux", + .id = 0, + .dev = { + .platform_data = &myboard_i2cmux_data, + }, +}; -- cgit v1.1