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/linux/Documentation/devicetree/bindings/auxdisplay/
H A Dhit,hd44780.yaml1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
3 ---
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
10 - Geert Uytterhoeven <geert@linux-m68k.org>
15 interface, which can be used in either 4-bit or 8-bit mode. By using a
24 data-gpios:
26 GPIO pins connected to the data signal lines DB0-DB7 (8-bit mode) or
27 DB4-DB7 (4-bit mode) of the LCD Controller's bus interface.
29 - maxItems: 4
30 - maxItems: 8
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/linux/drivers/gpio/
H A Dgpio-max3191x.c1 // SPDX-License-Identifier: GPL-2.0-only
3 * gpio-max3191x.c - GPIO driver for Maxim MAX3191x industrial serializer
8 * Multiple chips can be daisy-chained, the spec does not impose
11 * Either of two modes is selectable: In 8-bit mode, only the state
13 * In 16-bit mode, an additional status byte is clocked out with
17 * readout of non-faulting chips in the same daisy-chain.
21 * daisy-chain.
23 * If the chips are hardwired to 8-bit mode ("modesel" pulled high),
24 * gpio-pisosr.c can be used alternatively to this driver.
30 * https://datasheets.maximintegrated.com/en/ds/MAX31953-MAX31963.pdf
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