arch/arm/mach-s3c2400/gpio.c

   1 /* linux/arch/arm/mach-s3c2400/gpio.c
   2  *
   3  * Copyright (c) 2006 Lucas Correia Villa Real <lucasvr@gobolinux.org>
   4  *
   5  * S3C2400 GPIO support
   6  *
   7  * This program is free software; you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License as published by
   9  * the Free Software Foundation; either version 2 of the License, or
  10  * (at your option) any later version.
  11  *
  12  * This program is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  * GNU General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU General Public License
  18  * along with this program; if not, write to the Free Software
  19  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  20 */
  21
  22 #include <linux/kernel.h>
  23 #include <linux/init.h>
  24 #include <linux/module.h>
  25 #include <linux/interrupt.h>
  26 #include <linux/ioport.h>
  27
  28 #include <asm/hardware.h>
  29 #include <asm/irq.h>
  30 #include <asm/io.h>
  31
  32 #include <asm/arch/regs-gpio.h>
  33
  34 int s3c2400_gpio_getirq(unsigned int pin)
  35 {
  36         if (pin < S3C2410_GPE0 || pin > S3C2400_GPE7_EINT7)
  37                 return -1;  /* not valid interrupts */
  38
  39         return (pin - S3C2410_GPE0) + IRQ_EINT0;
  40 }
  41
  42 EXPORT_SYMBOL(s3c2400_gpio_getirq);