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# SPDX-License-Identifier: GPL-2.0
config FB_OLPC_DCON
tristate "One Laptop Per Child Display CONtroller support"
depends on OLPC && FB
depends on I2C
depends on BACKLIGHT_LCD_SUPPORT
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'.
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