/* * arch/arm/mach-imx/gpio.c * * author: Sascha Hauer * Created: april 20th, 2004 * Copyright: Synertronixx GmbH * * Common code for i.MX machines * * 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. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA * */ #include <common.h> #include <mach/imx-regs.h> void gpio_set_value(unsigned gpio, int value) { if(value) DR(gpio >> GPIO_PORT_SHIFT) |= (1 << (gpio & GPIO_PIN_MASK)); else DR(gpio >> GPIO_PORT_SHIFT) &= ~(1 << (gpio & GPIO_PIN_MASK)); } int gpio_direction_input(unsigned gpio) { imx_gpio_mode(gpio | GPIO_IN | GPIO_GIUS | GPIO_GPIO); return 0; } int gpio_direction_output(unsigned gpio, int value) { gpio_set_value(gpio, value); imx_gpio_mode(gpio | GPIO_OUT | GPIO_GIUS | GPIO_GPIO); return 0; }