1/* 2 * linux/include/asm-arm/arch-s3c2410/gpio.h 3 * 4 * S3C2410 GPIO wrappers for arch-neutral GPIO calls 5 * 6 * Written by Philipp Zabel <philipp.zabel@gmail.com> 7 * 8 * This program is free software; you can redistribute it and/or modify 9 * it under the terms of the GNU General Public License as published by 10 * the Free Software Foundation; either version 2 of the License, or 11 * (at your option) any later version. 12 * 13 * This program is distributed in the hope that it will be useful, 14 * but WITHOUT ANY WARRANTY; without even the implied warranty of 15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 16 * GNU General Public License for more details. 17 * 18 * You should have received a copy of the GNU General Public License 19 * along with this program; if not, write to the Free Software 20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 21 * 22 */ 23 24#ifndef __ASM_ARCH_S3C2410_GPIO_H 25#define __ASM_ARCH_S3C2410_GPIO_H 26 27#include <asm/irq.h> 28#include <asm/hardware.h> 29#include <asm/arch/regs-gpio.h> 30 31static inline int gpio_request(unsigned gpio, const char *label) 32{ 33 return 0; 34} 35 36static inline void gpio_free(unsigned gpio) 37{ 38 return; 39} 40 41static inline int gpio_direction_input(unsigned gpio) 42{ 43 s3c2410_gpio_cfgpin(gpio, S3C2410_GPIO_INPUT); 44 return 0; 45} 46 47static inline int gpio_direction_output(unsigned gpio, int value) 48{ 49 s3c2410_gpio_cfgpin(gpio, S3C2410_GPIO_OUTPUT); 50 /* REVISIT can we write the value first, to avoid glitching? */ 51 s3c2410_gpio_setpin(gpio, value); 52 return 0; 53} 54 55#define gpio_get_value(gpio) s3c2410_gpio_getpin(gpio) 56#define gpio_set_value(gpio,value) s3c2410_gpio_setpin(gpio, value) 57 58#include <asm-generic/gpio.h> /* cansleep wrappers */ 59 60#ifdef CONFIG_CPU_S3C2400 61#define gpio_to_irq(gpio) s3c2400_gpio_getirq(gpio) 62#else 63#define gpio_to_irq(gpio) s3c2410_gpio_getirq(gpio) 64#endif 65 66 67#endif 68