Searched +full:quasi +full:- +full:bidirectional (Results 1 – 4 of 4) sorted by relevance
1 /* SPDX-License-Identifier: GPL-2.0 */6 * struct pcf857x_platform_data - data to set up pcf857x driver8 * @n_latch: optional bit-inverse of initial register value; if20 * The @setup callback may be used with the kind of board-specific glue21 * which hands the (now-valid) GPIOs to other drivers, or which puts24 * These GPIO chips are only "quasi-bidirectional"; read the chip specs
1 # 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 expanders10 - Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>13 The PCF857x-compatible chips have "quasi-bidirectional" I/O lines that can be14 driven high by a pull-up current source or driven low to ground. This25 - maxim,max732826 - maxim,max732927 - nxp,pca8574[all …]
1 // SPDX-License-Identifier: GPL-2.0-or-later63 * that pin be used as an input; it's not an open-drain model, but acts64 * a bit like one. This is described as "quasi-bidirectional"; read the84 /*-------------------------------------------------------------------------*/86 /* Talk to 8-bit I/O expander */98 /* Talk to 16-bit I/O expander */120 /*-------------------------------------------------------------------------*/127 mutex_lock(&gpio->lock); in pcf857x_input()128 gpio->out |= (1 << offset); in pcf857x_input()129 status = gpio->write(gpio->client, gpio->out); in pcf857x_input()[all …]
1 # SPDX-License-Identifier: GPL-2.0-only57 non-sleeping contexts. They can make bitbanged serial protocols116 tristate "GPIO driver for 74xx-ICs with MMIO access"120 Say yes here to support GPIO functionality for 74xx-compatible ICs136 If driver is built as a module it will be called gpio-altera.297 tristate "Generic memory-mapped GPIO controller support (MMIO platform device)"300 Say yes here to support basic platform_device memory-mapped GPIO controllers.319 This GPIO controller supports double-edge interrupt and multi-core338 ICH-based chipsets. Currently supported devices: ICH6, ICH7, ICH8379 bool "Loongson-2/3 GPIO support"[all …]
