Hi Lars,
On Wed, Dec 6, 2017 at 2:52 PM, Lars Poeschel <poeschel@xxxxxxxxxxx> wrote:
> This adds a console driver for hd44780 based character lcd displays and
> clones. The driver currently supports 20x4 character displays with
> character ROMs A00 and A02.
> The hardware wirings to the display have to be supplied to the kernel in
> the devicetree. The binding doc has the necessary information.
> There are also tons of these cheap displays sold with a serial
> interface. Many of them use a simple pcf8574 gpio expanders. An example
> for using that kind of display is also in the binding doc.
>
> Signed-off-by: Lars Poeschel <poeschel@xxxxxxxxxxx>
Thanks for your patch!
> ---
> .../bindings/video/console/hd44780con.txt | 42 ++
> drivers/video/console/Kconfig | 13 +
> drivers/video/console/Makefile | 1 +
> drivers/video/console/hd44780con.c | 676 +++++++++++++++++++++
I'm wondering if you could implement this on top of the existing charlcd
framework:
drivers/auxdisplay/charlcd.c
include/misc/charlcd.h
which can use the existing hd44780 backend:
Documentation/devicetree/bindings/auxdisplay/hit,hd44780.txt
drivers/auxdisplay/hd44780.c
That way it can be used on other character LCDs, like the one supported by
drivers/auxdisplay/panel.c.
Thanks!
P.S. I did something similar a long time ago, cfr.
https://github.com/geertu/hd44780/blob/master/lcdcon.c
Gr{oetje,eeting}s,
Geert
--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@xxxxxxxxxxxxxx
In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
-- Linus Torvalds
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