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Searched +full:quasi +full:- +full:bidirectional (Results 1 – 7 of 7) sorted by relevance

/kernel/linux/linux-5.10/include/linux/platform_data/
Dpcf857x.h1 /* SPDX-License-Identifier: GPL-2.0 */
6 * struct pcf857x_platform_data - data to set up pcf857x driver
8 * @n_latch: optional bit-inverse of initial register value; if
20 * The @setup callback may be used with the kind of board-specific glue
21 * which hands the (now-valid) GPIOs to other drivers, or which puts
24 * These GPIO chips are only "quasi-bidirectional"; read the chip specs
/kernel/linux/linux-6.6/Documentation/devicetree/bindings/gpio/
Dnxp,pcf8575.yaml1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
3 ---
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
7 title: PCF857x-compatible I/O expanders
10 - Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
13 The PCF857x-compatible chips have "quasi-bidirectional" I/O lines that can be
14 driven high by a pull-up current source or driven low to ground. This
25 - maxim,max7328
26 - maxim,max7329
27 - nxp,pca8574
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/kernel/linux/linux-5.10/Documentation/devicetree/bindings/gpio/
Dgpio-pcf857x.txt1 * PCF857x-compatible I/O expanders
3 The PCF857x-compatible chips have "quasi-bidirectional" I/O lines that can be
4 driven high by a pull-up current source or driven low to ground. This combines
14 - compatible: should be one of the following.
15 - "maxim,max7328": For the Maxim MAX7378
16 - "maxim,max7329": For the Maxim MAX7329
17 - "nxp,pca8574": For the NXP PCA8574
18 - "nxp,pca8575": For the NXP PCA8575
19 - "nxp,pca9670": For the NXP PCA9670
20 - "nxp,pca9671": For the NXP PCA9671
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/kernel/linux/linux-5.10/drivers/gpio/
Dgpio-pcf857x.c1 // SPDX-License-Identifier: GPL-2.0-or-later
63 * that pin be used as an input; it's not an open-drain model, but acts
64 * a bit like one. This is described as "quasi-bidirectional"; read the
85 /*-------------------------------------------------------------------------*/
87 /* Talk to 8-bit I/O expander */
99 /* Talk to 16-bit I/O expander */
121 /*-------------------------------------------------------------------------*/
128 mutex_lock(&gpio->lock); in pcf857x_input()
129 gpio->out |= (1 << offset); in pcf857x_input()
130 status = gpio->write(gpio->client, gpio->out); in pcf857x_input()
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DKconfig1 # SPDX-License-Identifier: GPL-2.0-only
57 non-sleeping contexts. They can make bitbanged serial protocols
115 tristate "GPIO driver for 74xx-ICs with MMIO access"
119 Say yes here to support GPIO functionality for 74xx-compatible ICs
135 If driver is built as a module it will be called gpio-altera.
285 tristate "Generic memory-mapped GPIO controller support (MMIO platform device)"
288 Say yes here to support basic platform_device memory-mapped GPIO controllers.
316 ICH-based chipsets. Currently supported devices: ICH6, ICH7, ICH8
334 depends on ARM # For <asm/mach-types.h>
352 bool "Loongson-2/3 GPIO support"
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/kernel/linux/linux-6.6/drivers/gpio/
Dgpio-pcf857x.c1 // SPDX-License-Identifier: GPL-2.0-or-later
59 * that pin be used as an input; it's not an open-drain model, but acts
60 * a bit like one. This is described as "quasi-bidirectional"; read the
80 /*-------------------------------------------------------------------------*/
82 /* Talk to 8-bit I/O expander */
94 /* Talk to 16-bit I/O expander */
116 /*-------------------------------------------------------------------------*/
123 mutex_lock(&gpio->lock); in pcf857x_input()
124 gpio->out |= (1 << offset); in pcf857x_input()
125 status = gpio->write(gpio->client, gpio->out); in pcf857x_input()
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DKconfig1 # SPDX-License-Identifier: GPL-2.0-only
47 this symbol, but new drivers should use the generic gpio-regmap
57 non-sleeping contexts. They can make bitbanged serial protocols
118 Enables support for the idio-16 library functions. The idio-16 library
120 ACCES IDIO-16 family such as the 104-IDIO-16 and the PCI-IDIO-16.
122 If built as a module its name will be gpio-idio-16.
128 tristate "GPIO driver for 74xx-ICs with MMIO access"
132 Say yes here to support GPIO functionality for 74xx-compatible ICs
149 If driver is built as a module it will be called gpio-altera.
310 tristate "Generic memory-mapped GPIO controller support (MMIO platform device)"
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