/* * arch/arm/plat-iop/gpio.c * GPIO handling for Intel IOP3xx processors. * * Copyright (C) 2006 Lennert Buytenhek <buytenh@wantstofly.org> * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or (at * your option) any later version. */ #include <linux/device.h> #include <asm/hardware/iop3xx.h> void gpio_line_config(int line, int direction) { unsigned long flags; local_irq_save(flags); if (direction == GPIO_IN) { *IOP3XX_GPOE |= 1 << line; } else if (direction == GPIO_OUT) { *IOP3XX_GPOE &= ~(1 << line); } local_irq_restore(flags); } EXPORT_SYMBOL(gpio_line_config); int gpio_line_get(int line) { return !!(*IOP3XX_GPID & (1 << line)); } EXPORT_SYMBOL(gpio_line_get); void gpio_line_set(int line, int value) { unsigned long flags; local_irq_save(flags); if (value == GPIO_LOW) { *IOP3XX_GPOD &= ~(1 << line); } else if (value == GPIO_HIGH) { *IOP3XX_GPOD |= 1 << line; } local_irq_restore(flags); } EXPORT_SYMBOL(gpio_line_set);