1 /*
2 * arch/arm/mach-ixp4xx/include/mach/gpio.h
3 *
4 * IXP4XX GPIO wrappers for arch-neutral GPIO calls
5 *
6 * Written by Milan Svoboda <msvoboda@ra.rockwell.com>
7 * Based on PXA implementation by Philipp Zabel <philipp.zabel@gmail.com>
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version.
13 *
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
18 *
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
22 *
23 */
24
25 #ifndef __ASM_ARCH_IXP4XX_GPIO_H
26 #define __ASM_ARCH_IXP4XX_GPIO_H
27
28 #include <linux/kernel.h>
29 #include <mach/hardware.h>
30
gpio_request(unsigned gpio,const char * label)31 static inline int gpio_request(unsigned gpio, const char *label)
32 {
33 return 0;
34 }
35
gpio_free(unsigned gpio)36 static inline void gpio_free(unsigned gpio)
37 {
38 might_sleep();
39
40 return;
41 }
42
gpio_direction_input(unsigned gpio)43 static inline int gpio_direction_input(unsigned gpio)
44 {
45 gpio_line_config(gpio, IXP4XX_GPIO_IN);
46 return 0;
47 }
48
gpio_direction_output(unsigned gpio,int level)49 static inline int gpio_direction_output(unsigned gpio, int level)
50 {
51 gpio_line_set(gpio, level);
52 gpio_line_config(gpio, IXP4XX_GPIO_OUT);
53 return 0;
54 }
55
gpio_get_value(unsigned gpio)56 static inline int gpio_get_value(unsigned gpio)
57 {
58 int value;
59
60 gpio_line_get(gpio, &value);
61
62 return value;
63 }
64
gpio_set_value(unsigned gpio,int value)65 static inline void gpio_set_value(unsigned gpio, int value)
66 {
67 gpio_line_set(gpio, value);
68 }
69
70 #include <asm-generic/gpio.h> /* cansleep wrappers */
71
72 extern int gpio_to_irq(int gpio);
73 extern int irq_to_gpio(int gpio);
74
75 #endif
76
77