Hi,

I'm trying to add SLCD support for the Jz4740 LCD controller, which has a 
"custom" interface allowing communication (8-18bit, serial/parallel) from CPU to 
LCD panel through some registers.

As this differs from how other LCD panels are currently implemented in Linux 
(mostly using SPI), and as my board needs LCD initialization, I've exported 
functions from the jz4740 FB driver which can be used by 
drivers/video/backlight/*.c users.

However, the problem I'm currently facing is that the LCD panel driver gets 
loaded prior to the framebuffer, which obviously can't work as the LCD 
controller IP hasn't been initialized yet.

I've considered the possibility of emulating an SPI master driver on-top of the 
LCD controller, but this seems like a lot of boiler-plate for not much added 
benefit.

I've looked into tricking the driver base code getting to probe the framebuffer 
before the LCD panel driver, but AFAICS this can only be reliably done by making 
the framebuffer a bus and the LCD panel its child (simply setting the 
framebuffer as its parent doesn't work).

I've attached a patch containing my current implementation.

Any pointers would be appreciated.

-- 
Maurus Cuelenaere