arch/arm/plat-mxc/include/mach/gpio.h

   1 /*
   2  * Copyright 2007 Freescale Semiconductor, Inc. All Rights Reserved.
   3  * Copyright 2008 Juergen Beisert, kernel@pengutronix.de
   4  *
   5  * This program is free software; you can redistribute it and/or
   6  * modify it under the terms of the GNU General Public License
   7  * as published by the Free Software Foundation; either version 2
   8  * of the License, or (at your option) any later version.
   9  * This program is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License
  15  * along with this program; if not, write to the Free Software
  16  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
  17  */
  18
  19 #ifndef __ASM_ARCH_MXC_GPIO_H__
  20 #define __ASM_ARCH_MXC_GPIO_H__
  21
  22 #include <linux/spinlock.h>
  23 #include <mach/hardware.h>
  24 #include <asm-generic/gpio.h>
  25
  26
  27 /* There's a off-by-one betweem the gpio bank number and the gpiochip */
  28 /* range e.g. GPIO_1_5 is gpio 5 under linux */
  29 #define IMX_GPIO_NR(bank, nr)           (((bank) - 1) * 32 + (nr))
  30
  31 /* use gpiolib dispatchers */
  32 #define gpio_get_value          __gpio_get_value
  33 #define gpio_set_value          __gpio_set_value
  34 #define gpio_cansleep           __gpio_cansleep
  35
  36 #define gpio_to_irq(gpio)       (MXC_GPIO_IRQ_START + (gpio))
  37 #define irq_to_gpio(irq)        ((irq) - MXC_GPIO_IRQ_START)
  38
  39 struct mxc_gpio_port {
  40         void __iomem *base;
  41         int irq;
  42         int irq_high;
  43         int virtual_irq_start;
  44         struct gpio_chip chip;
  45         u32 both_edges;
  46         spinlock_t lock;
  47 };
  48
  49 int mxc_gpio_init(struct mxc_gpio_port*, int);
  50
  51 #endif