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