Messages in this thread | | | From | Geert Uytterhoeven <> | Date | Wed, 8 Feb 2017 18:19:03 +0100 | Subject | Re: [PATCH 13/13] auxdisplay: Add HD44780 Character LCD support |
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Hi Andy,
On Wed, Feb 8, 2017 at 5:27 PM, Andy Shevchenko <andy.shevchenko@gmail.com> wrote: > On Wed, Feb 8, 2017 at 3:41 PM, Geert Uytterhoeven <geert@linux-m68k.org> wrote: >> On Wed, Feb 8, 2017 at 2:38 PM, Andy Shevchenko >> <andy.shevchenko@gmail.com> wrote: >>> Btw, have you any plans to make an order among spreaded LCD drivers in >>> kernel? Perhaps we may gather them under auxdisplay hood? >> >> I have no such plan. I just had a long-standing personal interest in hd44780. > > I have one too regarding to I2C/SPI interfaced hardware. > If you remember it was an attempt for lcd-linux to be upstreamed, > which provides (besides i2c/spi bus drivers) those LCDs as tty > devices. > Also interesting feature to have.
I'm actually driving mine from SPI, using a 74HCT595 shift register and the 74x164 GPIO driver. Should work with i2c and a PCF8574 GPIO expander too, except that my SoC has 3.3V I/Os, while my display needs 5V, which is taken care of by the HCT shift register.
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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