Messages in this thread |  | | Date | Wed, 6 Jan 2021 12:37:30 +0100 | From | Ralf Schlatterbeck <> | Subject | [PATCH 0/1] auxdisplay: Add I2C gpio expander example |
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The Hitachi HD44780 is often used together with a PCF8574 based I2C I/O expander. It was non-obvious to me that the existing parallel connected version of the auxdisplay driver can already handle this configuration with appropriate device tree magic. This patch documents the necessary incantations in an example.
That this is not only non-obvious to me is documented by at least two I2C kernel implementations for the display out there.
Thanks to Geert Uytterhoeven for pointing out how this is done. Thanks to Miguel Ojeda for extensively commenting on my previous patch.
.../bindings/auxdisplay/hit,hd44780.yaml | 31 ++++++++++++++++++- 1 file changed, 30 insertions(+), 1 deletion(-)
Ralf -- Ralf Schlatterbeck Tel: +43/2243/26465-16 Open Source Consulting www: www.runtux.com Reichergasse 131, A-3411 Weidling email: office@runtux.com
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