config FB_OLPC_DCON tristate "One Laptop Per Child Display CONtroller support" depends on OLPC && FB depends on I2C depends on (GPIO_CS5535 || GPIO_CS5535=n) select BACKLIGHT_CLASS_DEVICE ---help--- In order to support very low power operation, the XO laptop uses a secondary Display CONtroller, or DCON. This secondary controller is present in the video pipeline between the primary display controller (integrate into the processor or chipset) and the LCD panel. It allows the main processor/display controller to be completely powered off while still retaining an image on the display. This controller is only available on OLPC platforms. Unless you have one of these platforms, you will want to say 'N'. config FB_OLPC_DCON_1 bool "OLPC XO-1 DCON support" depends on FB_OLPC_DCON && GPIO_CS5535 default y ---help--- Enable support for the DCON in XO-1 model laptops. The kernel communicates with the DCON using model-specific code. If you have an XO-1 (or if you're unsure what model you have), you should say 'Y'. config FB_OLPC_DCON_1_5 bool "OLPC XO-1.5 DCON support" depends on FB_OLPC_DCON && ACPI default y ---help--- Enable support for the DCON in XO-1.5 model laptops. The kernel communicates with the DCON using model-specific code. If you have an XO-1.5 (or if you're unsure what model you have), you should say 'Y'.