include/asm-arm/arch-sa1100/gpio.h

   1 /*
   2  * linux/include/asm-arm/arch-sa1100/gpio.h
   3  *
   4  * SA1100 GPIO wrappers for arch-neutral GPIO calls
   5  *
   6  * Written by Philipp Zabel <philipp.zabel@gmail.com>
   7  *
   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.
  12  *
  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.
  17  *
  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
  21  *
  22  */
  23
  24 #ifndef __ASM_ARCH_SA1100_GPIO_H
  25 #define __ASM_ARCH_SA1100_GPIO_H
  26
  27 #include <asm/hardware.h>
  28 #include <asm/irq.h>
  29
  30 static inline int gpio_request(unsigned gpio, const char *label)
  31 {
  32         return 0;
  33 }
  34
  35 static inline void gpio_free(unsigned gpio)
  36 {
  37         return;
  38 }
  39
  40 extern int gpio_direction_input(unsigned gpio);
  41 extern int gpio_direction_output(unsigned gpio, int value);
  42
  43
  44 static inline int gpio_get_value(unsigned gpio)
  45 {
  46         return GPLR & GPIO_GPIO(gpio);
  47 }
  48
  49 static inline void gpio_set_value(unsigned gpio, int value)
  50 {
  51         if (value)
  52                 GPSR = GPIO_GPIO(gpio);
  53         else
  54                 GPCR = GPIO_GPIO(gpio);
  55 }
  56
  57 #include <asm-generic/gpio.h>                   /* cansleep wrappers */
  58
  59 static inline unsigned gpio_to_irq(unsigned gpio)
  60 {
  61         if (gpio < 11)
  62                 return IRQ_GPIO0 + gpio;
  63         else
  64                 return IRQ_GPIO11 - 11 + gpio;
  65 }
  66
  67 static inline unsigned irq_to_gpio(unsigned irq)
  68 {
  69         if (irq < IRQ_GPIO11_27)
  70                 return irq - IRQ_GPIO0;
  71         else
  72                 return irq - IRQ_GPIO11 + 11;
  73 }
  74
  75 #endif