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/linux/Documentation/devicetree/bindings/gpio/
H A Dadi,ds4520-gpio.yaml1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
3 ---
4 $id: http://devicetree.org/schemas/gpio/adi,ds4520-gpio.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
7 title: DS4520 I2C GPIO expander
10 - Okan Sahin <okan.sahin@analog.com>
15 - adi,ds4520-gpio
20 gpio-controller: true
22 "#gpio-cells":
30 - compatible
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/linux/drivers/gpio/
H A Dgpio-ds4520.c1 // SPDX-License-Identifier: GPL-2.0-or-later
4 * Driver for the DS4520 I/O Expander
8 #include <linux/gpio/driver.h>
9 #include <linux/gpio/regmap.h>
26 struct device *dev = &client->dev; in ds4520_gpio_probe()
51 { .compatible = "adi,ds4520-gpio" },
57 { "ds4520-gpio" },
64 .name = "ds4520-gpio",
72 MODULE_DESCRIPTION("DS4520 I/O Expander");
H A DKconfig1 # SPDX-License-Identifier: GPL-2.0-only
3 # GPIO infrastructure and drivers
10 bool "GPIO Support"
12 This enables GPIO support through the generic GPIO library.
14 one or more of the GPIO drivers below.
50 this symbol, but new drivers should use the generic gpio-regmap
54 bool "Debug GPIO calls"
57 Say Y here to add some extra checks and diagnostics to GPIO calls.
60 non-sleeping contexts. They can make bitbanged serial protocols
65 bool "/sys/class/gpio/... (sysfs interface)" if EXPERT
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