release/src-rt-6.x.4708/linux/linux-2.6.36/arch/arm/mach-tegra/include/mach/gpio.h

   1 /*
   2  * arch/arm/mach-tegra/include/mach/gpio.h
   3  *
   4  * Copyright (C) 2010 Google, Inc.
   5  *
   6  * Author:
   7  *      Erik Gilling <konkers@google.com>
   8  *
   9  * This software is licensed under the terms of the GNU General Public
  10  * License version 2, as published by the Free Software Foundation, and
  11  * may be copied, distributed, and modified under those terms.
  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  */
  19
  20 #ifndef __MACH_TEGRA_GPIO_H
  21 #define __MACH_TEGRA_GPIO_H
  22
  23 #include <mach/irqs.h>
  24
  25 #define ARCH_NR_GPIOS           INT_GPIO_NR
  26
  27 #include <asm-generic/gpio.h>
  28
  29 #define gpio_get_value          __gpio_get_value
  30 #define gpio_set_value          __gpio_set_value
  31 #define gpio_cansleep           __gpio_cansleep
  32
  33 #define TEGRA_GPIO_TO_IRQ(gpio) (INT_GPIO_BASE + (gpio))
  34 #define TEGRA_IRQ_TO_GPIO(irq) ((gpio) - INT_GPIO_BASE)
  35
  36 static inline int gpio_to_irq(unsigned int gpio)
  37 {
  38         if (gpio < ARCH_NR_GPIOS)
  39                 return INT_GPIO_BASE + gpio;
  40         return -EINVAL;
  41 }
  42
  43 static inline int irq_to_gpio(unsigned int irq)
  44 {
  45         if ((irq >= INT_GPIO_BASE) && (irq < INT_GPIO_BASE + INT_GPIO_NR))
  46                 return irq - INT_GPIO_BASE;
  47         return -EINVAL;
  48 }
  49
  50 void tegra_gpio_enable(int gpio);
  51 void tegra_gpio_disable(int gpio);
  52
  53 #endif