kernel-ark/arch/arm/plat-s3c24xx/gpio.c
Ben Dooks 7987bd7a70 ARM: S3C24XX: Update missed gpio calls to use gpiolib
Update a couple of S3C24XX and S3C2412 files that are still
using the GPIO number to register mapping calls to get the
s3c_gpio_chip and use the base field from that.

Signed-off-by: Ben Dooks <ben-linux@fluff.org>
2010-05-18 19:06:33 +09:00

97 lines
2.4 KiB
C

/* linux/arch/arm/plat-s3c24xx/gpio.c
*
* Copyright (c) 2004-2010 Simtec Electronics
* Ben Dooks <ben@simtec.co.uk>
*
* S3C24XX GPIO support
*
* 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 <linux/kernel.h>
#include <linux/init.h>
#include <linux/module.h>
#include <linux/interrupt.h>
#include <linux/ioport.h>
#include <linux/gpio.h>
#include <linux/io.h>
#include <mach/hardware.h>
#include <mach/gpio-fns.h>
#include <asm/irq.h>
#include <mach/regs-gpio.h>
#include <plat/gpio-core.h>
/* gpiolib wrappers until these are totally eliminated */
void s3c2410_gpio_pullup(unsigned int pin, unsigned int to)
{
int ret;
WARN_ON(to); /* should be none of these left */
if (!to) {
/* if pull is enabled, try first with up, and if that
* fails, try using down */
ret = s3c_gpio_setpull(pin, S3C_GPIO_PULL_UP);
if (ret)
s3c_gpio_setpull(pin, S3C_GPIO_PULL_DOWN);
} else {
s3c_gpio_setpull(pin, S3C_GPIO_PULL_NONE);
}
}
EXPORT_SYMBOL(s3c2410_gpio_pullup);
void s3c2410_gpio_setpin(unsigned int pin, unsigned int to)
{
/* do this via gpiolib until all users removed */
gpio_request(pin, "temporary");
gpio_set_value(pin, to);
gpio_free(pin);
}
EXPORT_SYMBOL(s3c2410_gpio_setpin);
unsigned int s3c2410_gpio_getpin(unsigned int pin)
{
struct s3c_gpio_chip *chip = s3c_gpiolib_getchip(pin);
unsigned long offs = pin - chip->chip.base;
return __raw_readl(chip->base + 0x04) & (1<< offs);
}
EXPORT_SYMBOL(s3c2410_gpio_getpin);
unsigned int s3c2410_modify_misccr(unsigned int clear, unsigned int change)
{
unsigned long flags;
unsigned long misccr;
local_irq_save(flags);
misccr = __raw_readl(S3C24XX_MISCCR);
misccr &= ~clear;
misccr ^= change;
__raw_writel(misccr, S3C24XX_MISCCR);
local_irq_restore(flags);
return misccr;
}
EXPORT_SYMBOL(s3c2410_modify_misccr);