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72edd84a LB |
1 | /* |
2 | * arch/arm/plat-iop/gpio.c | |
3 | * GPIO handling for Intel IOP3xx processors. | |
4 | * | |
5 | * Copyright (C) 2006 Lennert Buytenhek <buytenh@wantstofly.org> | |
6 | * | |
7 | * This program is free software; you can redistribute it and/or modify | |
8 | * it under the terms of the GNU General Public License as published by | |
9 | * the Free Software Foundation; either version 2 of the License, or (at | |
10 | * your option) any later version. | |
11 | */ | |
12 | ||
13 | #include <linux/device.h> | |
14 | #include <asm/hardware/iop3xx.h> | |
15 | ||
16 | void gpio_line_config(int line, int direction) | |
17 | { | |
18 | unsigned long flags; | |
19 | ||
20 | local_irq_save(flags); | |
21 | if (direction == GPIO_IN) { | |
22 | *IOP3XX_GPOE |= 1 << line; | |
23 | } else if (direction == GPIO_OUT) { | |
24 | *IOP3XX_GPOE &= ~(1 << line); | |
25 | } | |
26 | local_irq_restore(flags); | |
27 | } | |
28 | EXPORT_SYMBOL(gpio_line_config); | |
29 | ||
30 | int gpio_line_get(int line) | |
31 | { | |
32 | return !!(*IOP3XX_GPID & (1 << line)); | |
33 | } | |
34 | EXPORT_SYMBOL(gpio_line_get); | |
35 | ||
36 | void gpio_line_set(int line, int value) | |
37 | { | |
38 | unsigned long flags; | |
39 | ||
40 | local_irq_save(flags); | |
41 | if (value == GPIO_LOW) { | |
42 | *IOP3XX_GPOD &= ~(1 << line); | |
43 | } else if (value == GPIO_HIGH) { | |
44 | *IOP3XX_GPOD |= 1 << line; | |
45 | } | |
46 | local_irq_restore(flags); | |
47 | } | |
48 | EXPORT_SYMBOL(gpio_line_set); |