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 29int 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 62EXPORT_SYMBOL(s3c2412_gpio_set_sleepcfg); 63