63 строки
1.3 KiB
C
63 строки
1.3 KiB
C
/* linux/arch/arm/mach-s3c2412/gpio.c
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*
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* Copyright (c) 2007 Simtec Electronics
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* Ben Dooks <ben@simtec.co.uk>
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*
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* http://armlinux.simtec.co.uk/.
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*
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* S3C2412/S3C2413 specific GPIO support
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#include <linux/kernel.h>
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#include <linux/types.h>
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#include <linux/module.h>
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#include <linux/interrupt.h>
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#include <linux/gpio.h>
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#include <asm/mach/arch.h>
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#include <asm/mach/map.h>
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#include <mach/regs-gpio.h>
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#include <mach/hardware.h>
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#include <plat/gpio-core.h>
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int s3c2412_gpio_set_sleepcfg(unsigned int pin, unsigned int state)
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{
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struct samsung_gpio_chip *chip = samsung_gpiolib_getchip(pin);
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unsigned long offs = pin - chip->chip.base;
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unsigned long flags;
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unsigned long slpcon;
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offs *= 2;
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if (pin < S3C2410_GPB(0))
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return -EINVAL;
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if (pin >= S3C2410_GPF(0) &&
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pin <= S3C2410_GPG(16))
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return -EINVAL;
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if (pin > S3C2410_GPH(16))
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return -EINVAL;
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local_irq_save(flags);
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slpcon = __raw_readl(chip->base + 0x0C);
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slpcon &= ~(3 << offs);
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slpcon |= state << offs;
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__raw_writel(slpcon, chip->base + 0x0C);
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local_irq_restore(flags);
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return 0;
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}
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EXPORT_SYMBOL(s3c2412_gpio_set_sleepcfg);
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