include/linux/of_gpio.h

1 /* SPDX-License-Identifier: GPL-2.0+ */
5  * Copyright (c) 2007-2008  MontaVista Software, Inc.
21  * This is Linux-specific flags. By default controllers' and Linux' mapping
23  * Linux-specific in their .xlate callback. Though, 1:1 mapping is recommended.
52 extern int of_get_named_gpio_flags(struct device_node *np,
53 		const char *list_name, int index, enum of_gpio_flags *flags);
55 extern int of_mm_gpiochip_add_data(struct device_node *np,
58 static inline int of_mm_gpiochip_add(struct device_node *np,  in of_mm_gpiochip_add()
70 static inline int of_get_named_gpio_flags(struct device_node *np,  in of_get_named_gpio_flags()
71 		const char *list_name, int index, enum of_gpio_flags *flags)  in of_get_named_gpio_flags()
76 	return -ENOSYS;  in of_get_named_gpio_flags()
82  * of_gpio_named_count() - Count GPIOs for a device
83  * @np:		device node to count GPIOs for
86  * The function returns the count of GPIOs specified for a node.
88  *   Number of gpios defined in property,
89  *   -EINVAL for an incorrectly formed gpios property, or
90  *   -ENOENT for a missing gpios property
93  * gpios = <0
98  * The above example defines four GPIOs, two of which are not specified.
101 static inline int of_gpio_named_count(struct device_node *np, const char* propname)  in of_gpio_named_count()
103 	return of_count_phandle_with_args(np, propname, "#gpio-cells");  in of_gpio_named_count()
107  * of_gpio_count() - Count GPIOs for a device
108  * @np:		device node to count GPIOs for
110  * Same as of_gpio_named_count, but hard coded to use the 'gpios' property
112 static inline int of_gpio_count(struct device_node *np)  in of_gpio_count()
114 	return of_gpio_named_count(np, "gpios");  in of_gpio_count()
117 static inline int of_get_gpio_flags(struct device_node *np, int index,  in of_get_gpio_flags()
120 	return of_get_named_gpio_flags(np, "gpios", index, flags);  in of_get_gpio_flags()
124  * of_get_named_gpio() - Get a GPIO number to use with GPIO API
132 static inline int of_get_named_gpio(struct device_node *np,  in of_get_named_gpio()
133                                    const char *propname, int index)  in of_get_named_gpio()
139  * of_get_gpio() - Get a GPIO number to use with GPIO API
146 static inline int of_get_gpio(struct device_node *np, int index)  in of_get_gpio()