1# SPDX-License-Identifier: GPL-2.0 2config FB_OLPC_DCON 3 tristate "One Laptop Per Child Display CONtroller support" 4 depends on OLPC && FB 5 depends on I2C 6 depends on (GPIO_CS5535 || GPIO_CS5535=n) 7 select BACKLIGHT_CLASS_DEVICE 8 help 9 In order to support very low power operation, the XO laptop uses a 10 secondary Display CONtroller, or DCON. This secondary controller 11 is present in the video pipeline between the primary display 12 controller (integrate into the processor or chipset) and the LCD 13 panel. It allows the main processor/display controller to be 14 completely powered off while still retaining an image on the display. 15 This controller is only available on OLPC platforms. Unless you have 16 one of these platforms, you will want to say 'N'. 17 18config FB_OLPC_DCON_1 19 bool "OLPC XO-1 DCON support" 20 depends on FB_OLPC_DCON && GPIO_CS5535 21 default y 22 help 23 Enable support for the DCON in XO-1 model laptops. The kernel 24 communicates with the DCON using model-specific code. If you 25 have an XO-1 (or if you're unsure what model you have), you should 26 say 'Y'. 27 28config FB_OLPC_DCON_1_5 29 bool "OLPC XO-1.5 DCON support" 30 depends on FB_OLPC_DCON && ACPI 31 default y 32 help 33 Enable support for the DCON in XO-1.5 model laptops. The kernel 34 communicates with the DCON using model-specific code. If you 35 have an XO-1.5 (or if you're unsure what model you have), you 36 should say 'Y'. 37