[PATCH 1/3] ARM: driver for the character LCD found in ARM refdesigns

[Colin Tuckley]

> -----Original Message-----
> kernel-bounces at lists.infradead.org] On Behalf Of Linus Walleij

> This adds a driver for the character LCD found on the ARM Versatile
> and RealView Platform Baseboards. It doesn't do very much more than
> display the text "ARM Linux" on the first line and the linux banner
> on the second line, but that's still useful.

> The 4bit mode is the only one that seems to work. I tried putting
> the display into 8bit mode and failed miserably.

I've had a check with the hardware guys. Our self-test software uses the 4-bit mode, the 8-bit mode is untested.


> The IRQ is stated in the reference manual as "don't use" because it
> is "reserved for future use" but I implemented it anyway.

The answer seems to be that "future use" means "for an OS".

Colin

--
Colin Tuckley - ARM Ltd.
110 Fulbourn Rd
Cambridge, CB1 9NJ
Tel: +44 1223 400536


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