linux-imx

/*

 * arch/arm/mach-ks8695/gpio.c

 *

 * Copyright (C) 2006 Andrew Victor

 * Updated to GPIOLIB, Copyright 2008 Simtec Electronics

 *                     Daniel Silverstone <dsilvers@simtec.co.uk>

 *

 * This program is free software; you can redistribute it and/or modify

 * it under the terms of the GNU General Public License version 2 as

 * published by the Free Software Foundation.

 *

 * 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 <linux/gpio/driver.h>

#include <linux/kernel.h>

#include <linux/mm.h>

#include <linux/init.h>

#include <linux/debugfs.h>

#include <linux/seq_file.h>

#include <linux/module.h>

#include <linux/io.h>

​

#include <mach/hardware.h>

#include <asm/mach/irq.h>

​

#include <mach/regs-gpio.h>

#include <mach/gpio-ks8695.h>

​

/*

 * Configure a GPIO line for either GPIO function, or its internal

 * function (Interrupt, Timer, etc).

 */

static void ks8695_gpio_mode(unsigned int pin, short gpio)

{

    unsigned int enable[] = { IOPC_IOEINT0EN, IOPC_IOEINT1EN, IOPC_IOEINT2EN, IOPC_IOEINT3EN, IOPC_IOTIM0EN, IOPC_IOTIM1EN };

    unsigned long x, flags;

​

    if (pin > KS8695_GPIO_5)    /* only GPIO 0..5 have internal functions */

        return;

​

    local_irq_save(flags);

​

    x = __raw_readl(KS8695_GPIO_VA + KS8695_IOPC);

    if (gpio)           /* GPIO: set bit to 0 */

        x &= ~enable[pin];

    else                /* Internal function: set bit to 1 */

        x |= enable[pin];

    __raw_writel(x, KS8695_GPIO_VA + KS8695_IOPC);

​

    local_irq_restore(flags);

}

​

​

static unsigned short gpio_irq[] = { KS8695_IRQ_EXTERN0, KS8695_IRQ_EXTERN1, KS8695_IRQ_EXTERN2, KS8695_IRQ_EXTERN3 };

​

/*