1 /* arch/arm/mach-s3c24100/include/mach/gpio-core.h
2  *
3  * Copyright 2008 Openmoko, Inc.
4  * Copyright 2008 Simtec Electronics
5  *      Ben Dooks <ben@simtec.co.uk>
6  *      http://armlinux.simtec.co.uk/
7  *
8  * S3C2410 - GPIO core support
9  *
10  * This program is free software; you can redistribute it and/or modify
11  * it under the terms of the GNU General Public License version 2 as
12  * published by the Free Software Foundation.
13 */
14 
15 #ifndef __ASM_ARCH_GPIO_CORE_H
16 #define __ASM_ARCH_GPIO_CORE_H __FILE__
17 
18 #include <mach/regs-gpio.h>
19 
20 extern struct s3c_gpio_chip s3c24xx_gpios[];
21 
s3c_gpiolib_getchip(unsigned int pin)22 static inline struct s3c_gpio_chip *s3c_gpiolib_getchip(unsigned int pin)
23 {
24 	struct s3c_gpio_chip *chip;
25 
26 	if (pin > S3C_GPIO_END)
27 		return NULL;
28 
29 	chip = &s3c24xx_gpios[pin/32];
30 	return ((pin - chip->chip.base) < chip->chip.ngpio) ? chip : NULL;
31 }
32 
33 #endif /* __ASM_ARCH_GPIO_CORE_H */
34