Messages in this thread | | | From | Geert Uytterhoeven <> | Date | Wed, 6 Dec 2017 16:04:10 +0100 | Subject | Re: [PATCH] video: hd44780: Add hd44780 lcd display driver |
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Hi Lars,
On Wed, Dec 6, 2017 at 2:52 PM, Lars Poeschel <poeschel@lemonage.de> 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@lemonage.de>
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@linux-m68k.org
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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