| Lennert Buytenhek | 72edd84 | 2006-09-18 23:23:07 +0100 | [diff] [blame] | 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); |