1 /* linux/arch/arm/plat-s3c/include/plat/gpio-core.h
3 * Copyright 2008 Simtec Electronics
4 * http://armlinux.simtec.co.uk/
5 * Ben Dooks <ben@simtec.co.uk>
7 * S3C Platform - GPIO core
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License version 2 as
11 * published by the Free Software Foundation.
14 /* Define the core gpiolib support functions that the s3c platforms may
15 * need to extend or change depending on the hardware and the s3c chip
16 * selected at build or found at run time.
18 * These definitions are not intended for driver inclusion, there is
19 * nothing here that should not live outside the platform and core
24 * struct s3c_gpio_chip - wrapper for specific implementation of gpio
25 * @chip: The chip structure to be exported via gpiolib.
26 * @base: The base pointer to the gpio configuration registers.
28 * This wrapper provides the necessary information for the Samsung
29 * specific gpios being registered with gpiolib.
31 struct s3c_gpio_chip {
32 struct gpio_chip chip;
36 static inline struct s3c_gpio_chip *to_s3c_gpio(struct gpio_chip *gpc)
38 return container_of(gpc, struct s3c_gpio_chip, chip);
41 /** s3c_gpiolib_add() - add the s3c specific version of a gpio_chip.
42 * @chip: The chip to register
44 * This is a wrapper to gpiochip_add() that takes our specific gpio chip
45 * information and makes the necessary alterations for the platform and
46 * notes the information for use with the configuration systems and any
47 * other parts of the system.
49 extern void s3c_gpiolib_add(struct s3c_gpio_chip *chip);