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
31 static inline int gpio_request(unsigned gpio, const char *label)
32 {
33 return 0;
34 }
35
36 static inline void gpio_free(unsigned gpio)
37 {
38 return;
39 }
40
41 static inline int gpio_direction_input(unsigned gpio)
42 {
43 s3c2410_gpio_cfgpin(gpio, S3C2410_GPIO_INPUT);
44 return 0;
45 }
46
47 static 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 /* FIXME implement irq_to_gpio() */
67
68 #endif
69
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