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

   1 /*
   2  * linux/include/asm-arm/arch-pxa/gpio.h
   3  *
   4  * PXA 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_PXA_GPIO_H
  25 #define __ASM_ARCH_PXA_GPIO_H
  26
  27 #include <asm/arch/pxa-regs.h>
  28 #include <asm/irq.h>
  29 #include <asm/hardware.h>
  30
  31 #include <asm-generic/gpio.h>
  32
  33
  34 /* NOTE: some PXAs have fewer on-chip GPIOs (like PXA255, with 85).
  35  * Those cases currently cause holes in the GPIO number space.
  36  */
  37 #define NR_BUILTIN_GPIO 128
  38
  39 static inline int gpio_get_value(unsigned gpio)
  40 {
  41         if (__builtin_constant_p(gpio) && (gpio < NR_BUILTIN_GPIO))
  42                 return GPLR(gpio) & GPIO_bit(gpio);
  43         else
  44                 return __gpio_get_value(gpio);
  45 }
  46
  47 static inline void gpio_set_value(unsigned gpio, int value)
  48 {
  49         if (__builtin_constant_p(gpio) && (gpio < NR_BUILTIN_GPIO)) {
  50                 if (value)
  51                         GPSR(gpio) = GPIO_bit(gpio);
  52                 else
  53                         GPCR(gpio) = GPIO_bit(gpio);
  54         } else {
  55                 __gpio_set_value(gpio, value);
  56         }
  57 }
  58
  59 #define gpio_cansleep __gpio_cansleep
  60
  61 #define gpio_to_irq(gpio)       IRQ_GPIO(gpio)
  62 #define irq_to_gpio(irq)        IRQ_TO_GPIO(irq)
  63
  64
  65 #endif