dtoverlays: Add overlay for HD44780 via I2C PCF8574 backpack #6293
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pelwell
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arch/arm/boot/dts/overlays/README
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| pin_bl GPIO pin for enabling/disabling the display | ||
| backlight. (default 3) | ||
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| display_height Height of the display in characters |
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The dimensions have default values but they aren't documented?
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They weren't documented for hd44780-lcd on which this was based.
Now documented in both.
Many HD44780 LCD displays are connected via very common I2C GPIO expander. We have an overlay for connecting the displays directly to GPIOs, but not one for it connected via a backpack. Add such an overlay. Signed-off-by: Dave Stevenson <[email protected]>
The default values defining a 16x2 display weren't documented, so add them. Signed-off-by: Dave Stevenson <[email protected]>
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kernel: spi: dw: Fix non-DMA transmit-only transfers See: raspberrypi/linux#6286 kernel: ARM: dts: bcm2712: Fix invalid polling-delay-passive setting See: raspberrypi/linux#6290 kernel: dtoverlays: Add overlay for HD44780 via I2C PCF8574 backpack See: raspberrypi/linux#6293 kernel: DTS: bcm2712: enable SD slot CQE by default on Pi 5 See: raspberrypi/linux#6301
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kernel: spi: dw: Fix non-DMA transmit-only transfers See: raspberrypi/linux#6286 kernel: ARM: dts: bcm2712: Fix invalid polling-delay-passive setting See: raspberrypi/linux#6290 kernel: dtoverlays: Add overlay for HD44780 via I2C PCF8574 backpack See: raspberrypi/linux#6293 kernel: DTS: bcm2712: enable SD slot CQE by default on Pi 5 See: raspberrypi/linux#6301
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Many HD44780 LCD displays are connected via very common I2C GPIO expander.
We have an overlay for connecting the displays directly to GPIOs, but not one for it connected via a backpack. Add such an overlay.
Requested https://forums.raspberrypi.com/viewtopic.php?t=374408