1 /* linux/arch/arm/mach-s3c2412/gpio.c
2  *
3  * Copyright (c) 2007 Simtec Electronics
4  *	Ben Dooks <ben@simtec.co.uk>
5  *
6  * http://armlinux.simtec.co.uk/.
7  *
8  * S3C2412/S3C2413 specific GPIO support
9  *
10  * This program is free software; you can redistribute it and/or modify
11  * it under the terms of the GNU General Public License version 2 as
12  * published by the Free Software Foundation.
13 */
14 
15 #include <linux/kernel.h>
16 #include <linux/types.h>
17 #include <linux/module.h>
18 #include <linux/interrupt.h>
19 #include <linux/gpio.h>
20 
21 #include <asm/mach/arch.h>
22 #include <asm/mach/map.h>
23 
24 #include <mach/regs-gpio.h>
25 #include <mach/hardware.h>
26 
27 #include <plat/gpio-core.h>
28 
s3c2412_gpio_set_sleepcfg(unsigned int pin,unsigned int state)29 int s3c2412_gpio_set_sleepcfg(unsigned int pin, unsigned int state)
30 {
31 	struct samsung_gpio_chip *chip = samsung_gpiolib_getchip(pin);
32 	unsigned long offs = pin - chip->chip.base;
33 	unsigned long flags;
34 	unsigned long slpcon;
35 
36 	offs *= 2;
37 
38 	if (pin < S3C2410_GPB(0))
39 		return -EINVAL;
40 
41 	if (pin >= S3C2410_GPF(0) &&
42 	    pin <= S3C2410_GPG(16))
43 		return -EINVAL;
44 
45 	if (pin > S3C2410_GPH(16))
46 		return -EINVAL;
47 
48 	local_irq_save(flags);
49 
50 	slpcon = __raw_readl(chip->base + 0x0C);
51 
52 	slpcon &= ~(3 << offs);
53 	slpcon |= state << offs;
54 
55 	__raw_writel(slpcon, chip->base + 0x0C);
56 
57 	local_irq_restore(flags);
58 
59 	return 0;
60 }
61 
62 EXPORT_SYMBOL(s3c2412_gpio_set_sleepcfg);
63