tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1/*
2 * linux/include/asm-arm/arch-pxa/gpio.h
3 *
4 * PXA 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_PXA_GPIO_H
25#define __ASM_ARCH_PXA_GPIO_H
26
27#include <asm/arch/pxa-regs.h>
28#include <asm/irq.h>
29#include <asm/hardware.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 return pxa_gpio_mode(gpio | GPIO_IN);
44}
45
46static inline int gpio_direction_output(unsigned gpio, int value)
47{
48 return pxa_gpio_mode(gpio | GPIO_OUT |
49 (value ? GPIO_DFLT_HIGH : GPIO_DFLT_LOW));
50}
51
52static inline int __gpio_get_value(unsigned gpio)
53{
54 return GPLR(gpio) & GPIO_bit(gpio);
55}
56
57#define gpio_get_value(gpio) \
58 (__builtin_constant_p(gpio) ? \
59 __gpio_get_value(gpio) : \
60 pxa_gpio_get_value(gpio))
61
62static inline void __gpio_set_value(unsigned gpio, int value)
63{
64 if (value)
65 GPSR(gpio) = GPIO_bit(gpio);
66 else
67 GPCR(gpio) = GPIO_bit(gpio);
68}
69
70#define gpio_set_value(gpio,value) \
71 (__builtin_constant_p(gpio) ? \
72 __gpio_set_value(gpio, value) : \
73 pxa_gpio_set_value(gpio, value))
74
75#include <asm-generic/gpio.h> /* cansleep wrappers */
76
77#define gpio_to_irq(gpio) IRQ_GPIO(gpio)
78#define irq_to_gpio(irq) IRQ_TO_GPIO(irq)
79
80
81#endif