release/src-rt-6.x.4708/linux/linux-2.6.36/arch/arm/mach-lpc32xx/include/mach/gpio.h

   1 /*
   2  * arch/arm/mach-lpc32xx/include/mach/gpio.h
   3  *
   4  * Author: Kevin Wells <kevin.wells@nxp.com>
   5  *
   6  * Copyright (C) 2010 NXP Semiconductors
   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
  19 #ifndef __ASM_ARCH_GPIO_H
  20 #define __ASM_ARCH_GPIO_H
  21
  22 #include <asm-generic/gpio.h>
  23
  24 /*
  25  * Note!
  26  * Muxed GP pins need to be setup to the GP state in the board level
  27  * code prior to using this driver.
  28  * GPI pins : 28xP3 group
  29  * GPO pins : 24xP3 group
  30  * GPIO pins: 8xP0 group, 24xP1 group, 13xP2 group, 6xP3 group
  31  */
  32
  33 #define LPC32XX_GPIO_P0_MAX 8
  34 #define LPC32XX_GPIO_P1_MAX 24
  35 #define LPC32XX_GPIO_P2_MAX 13
  36 #define LPC32XX_GPIO_P3_MAX 6
  37 #define LPC32XX_GPI_P3_MAX 28
  38 #define LPC32XX_GPO_P3_MAX 24
  39
  40 #define LPC32XX_GPIO_P0_GRP 0
  41 #define LPC32XX_GPIO_P1_GRP (LPC32XX_GPIO_P0_GRP + LPC32XX_GPIO_P0_MAX)
  42 #define LPC32XX_GPIO_P2_GRP (LPC32XX_GPIO_P1_GRP + LPC32XX_GPIO_P1_MAX)
  43 #define LPC32XX_GPIO_P3_GRP (LPC32XX_GPIO_P2_GRP + LPC32XX_GPIO_P2_MAX)
  44 #define LPC32XX_GPI_P3_GRP (LPC32XX_GPIO_P3_GRP + LPC32XX_GPIO_P3_MAX)
  45 #define LPC32XX_GPO_P3_GRP (LPC32XX_GPI_P3_GRP + LPC32XX_GPI_P3_MAX)
  46
  47 /*
  48  * A specific GPIO can be selected with this macro
  49  * ie, GPIO_05 can be selected with LPC32XX_GPIO(LPC32XX_GPIO_P3_GRP, 5)
  50  * See the LPC32x0 User's guide for GPIO group numbers
  51  */
  52 #define LPC32XX_GPIO(x, y) ((x) + (y))
  53
  54 static inline int gpio_get_value(unsigned gpio)
  55 {
  56         return __gpio_get_value(gpio);
  57 }
  58
  59 static inline void gpio_set_value(unsigned gpio, int value)
  60 {
  61         __gpio_set_value(gpio, value);
  62 }
  63
  64 static inline int gpio_cansleep(unsigned gpio)
  65 {
  66         return __gpio_cansleep(gpio);
  67 }
  68
  69 static inline int gpio_to_irq(unsigned gpio)
  70 {
  71         return __gpio_to_irq(gpio);
  72 }
  73
  74 #endif