1 /* linux/arch/arm/plat-s3c24xx/gpio.c
3 * Copyright (c) 2004-2010 Simtec Electronics
4 * Ben Dooks <ben@simtec.co.uk>
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
23 #include <linux/kernel.h>
24 #include <linux/init.h>
25 #include <linux/module.h>
26 #include <linux/interrupt.h>
27 #include <linux/ioport.h>
28 #include <linux/gpio.h>
31 #include <mach/hardware.h>
32 #include <mach/gpio-fns.h>
35 #include <mach/regs-gpio.h>
37 /* gpiolib wrappers until these are totally eliminated */
39 void s3c2410_gpio_pullup(unsigned int pin, unsigned int to)
43 WARN_ON(to); /* should be none of these left */
46 /* if pull is enabled, try first with up, and if that
47 * fails, try using down */
49 ret = s3c_gpio_setpull(pin, S3C_GPIO_PULL_UP);
51 s3c_gpio_setpull(pin, S3C_GPIO_PULL_DOWN);
53 s3c_gpio_setpull(pin, S3C_GPIO_PULL_NONE);
56 EXPORT_SYMBOL(s3c2410_gpio_pullup);
58 void s3c2410_gpio_setpin(unsigned int pin, unsigned int to)
60 /* do this via gpiolib until all users removed */
62 gpio_request(pin, "temporary");
63 gpio_set_value(pin, to);
67 EXPORT_SYMBOL(s3c2410_gpio_setpin);
69 unsigned int s3c2410_gpio_getpin(unsigned int pin)
71 void __iomem *base = S3C24XX_GPIO_BASE(pin);
72 unsigned long offs = S3C2410_GPIO_OFFSET(pin);
74 return __raw_readl(base + 0x04) & (1<< offs);
77 EXPORT_SYMBOL(s3c2410_gpio_getpin);
79 unsigned int s3c2410_modify_misccr(unsigned int clear, unsigned int change)
84 local_irq_save(flags);
85 misccr = __raw_readl(S3C24XX_MISCCR);
88 __raw_writel(misccr, S3C24XX_MISCCR);
89 local_irq_restore(flags);
94 EXPORT_SYMBOL(s3c2410_modify_misccr);