diff options
Diffstat (limited to 'Documentation')
| -rw-r--r-- | Documentation/i2c/busses/i2c-viapro | 6 | ||||
| -rw-r--r-- | Documentation/i2c/muxes/i2c-mux-gpio | 18 |
2 files changed, 23 insertions, 1 deletions
diff --git a/Documentation/i2c/busses/i2c-viapro b/Documentation/i2c/busses/i2c-viapro index 2e758b0e9456..b88f91ae580e 100644 --- a/Documentation/i2c/busses/i2c-viapro +++ b/Documentation/i2c/busses/i2c-viapro @@ -20,7 +20,10 @@ Supported adapters: Datasheet: available on http://linux.via.com.tw * VIA Technologies, Inc. VX855/VX875 - Datasheet: Availability unknown + Datasheet: available on http://linux.via.com.tw + + * VIA Technologies, Inc. VX900 + Datasheet: available on http://linux.via.com.tw Authors: Kyösti Mälkki <kmalkki@cc.hut.fi>, @@ -57,6 +60,7 @@ Your lspci -n listing must show one of these : device 1106:8324 (CX700) device 1106:8353 (VX800/VX820) device 1106:8409 (VX855/VX875) + device 1106:8410 (VX900) If none of these show up, you should look in the BIOS for settings like enable ACPI / SMBus or even USB. diff --git a/Documentation/i2c/muxes/i2c-mux-gpio b/Documentation/i2c/muxes/i2c-mux-gpio index bd9b2299b739..d4d91a53fc39 100644 --- a/Documentation/i2c/muxes/i2c-mux-gpio +++ b/Documentation/i2c/muxes/i2c-mux-gpio @@ -63,3 +63,21 @@ static struct platform_device myboard_i2cmux = { .platform_data = &myboard_i2cmux_data, }, }; + +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, +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 +of any GPIO pin it uses as the device ID. This guarantees that every +instance has a different ID. + +Alternatively, if you don't need a stable device name, you can simply +pass PLATFORM_DEVID_AUTO as the device ID, and the platform core will +assign a dynamic ID to your device. If you do not know the absolute +GPIO pin numbers at registration time, this is even the only option. |