release/src-rt-6.x/linux/linux-2.6/include/asm-arm/arch-ixp4xx/gpio.h

   1 /*
   2  * linux/include/asm-arm/arch-ixp4xx/gpio.h
   3  *
   4  * IXP4XX GPIO wrappers for arch-neutral GPIO calls
   5  *
   6  * Written by Milan Svoboda <msvoboda@ra.rockwell.com>
   7  * Based on PXA implementation by Philipp Zabel <philipp.zabel@gmail.com>
   8  *
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License as published by
  11  * the Free Software Foundation; either version 2 of the License, or
  12  * (at your option) any later version.
  13  *
  14  * This program is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  17  * GNU General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU General Public License
  20  * along with this program; if not, write to the Free Software
  21  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  22  *
  23  */
  24
  25 #ifndef __ASM_ARCH_IXP4XX_GPIO_H
  26 #define __ASM_ARCH_IXP4XX_GPIO_H
  27
  28 #include <asm/hardware.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 static inline int gpio_direction_input(unsigned gpio)
  41 {
  42         gpio_line_config(gpio, IXP4XX_GPIO_IN);
  43         return 0;
  44 }
  45
  46 static inline int gpio_direction_output(unsigned gpio, int level)
  47 {
  48         gpio_line_set(gpio, level);
  49         gpio_line_config(gpio, IXP4XX_GPIO_OUT);
  50         return 0;
  51 }
  52
  53 static inline int gpio_get_value(unsigned gpio)
  54 {
  55         int value;
  56
  57         gpio_line_get(gpio, &value);
  58
  59         return value;
  60 }
  61
  62 static inline void gpio_set_value(unsigned gpio, int value)
  63 {
  64         gpio_line_set(gpio, value);
  65 }
  66
  67 #include <asm-generic/gpio.h>                   /* cansleep wrappers */
  68
  69 extern int gpio_to_irq(int gpio);
  70 extern int irq_to_gpio(int gpio);
  71
  72 #endif
  73