Linux Kernel  3.7.1
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iop3xx-gpio.h
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1 /*
2  * arch/arm/include/asm/hardware/iop3xx-gpio.h
3  *
4  * IOP3xx GPIO wrappers
5  *
6  * Copyright (c) 2008 Arnaud Patard <[email protected]>
7  * Based on IXP4XX gpio.h file
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_ARM_HARDWARE_IOP3XX_GPIO_H
26 #define __ASM_ARM_HARDWARE_IOP3XX_GPIO_H
27 
28 #include <mach/hardware.h>
29 #include <asm-generic/gpio.h>
30 
31 #define __ARM_GPIOLIB_COMPLEX
32 
33 #define IOP3XX_N_GPIOS 8
34 
35 static inline int gpio_get_value(unsigned gpio)
36 {
37  if (gpio > IOP3XX_N_GPIOS)
38  return __gpio_get_value(gpio);
39 
40  return gpio_line_get(gpio);
41 }
42 
43 static inline void gpio_set_value(unsigned gpio, int value)
44 {
45  if (gpio > IOP3XX_N_GPIOS) {
46  __gpio_set_value(gpio, value);
47  return;
48  }
49  gpio_line_set(gpio, value);
50 }
51 
52 static inline int gpio_cansleep(unsigned gpio)
53 {
54  if (gpio < IOP3XX_N_GPIOS)
55  return 0;
56  else
57  return __gpio_cansleep(gpio);
58 }
59 
60 /*
61  * The GPIOs are not generating any interrupt
62  * Note : manuals are not clear about this
63  */
64 static inline int gpio_to_irq(int gpio)
65 {
66  return -EINVAL;
67 }
68 
69 static inline int irq_to_gpio(int gpio)
70 {
71  return -EINVAL;
72 }
73 
74 #endif
75