target/linux/ramips/files/arch/mips/include/asm/mach-ralink/ramips_gpio.h

   1 /*
   2  * Ralink SoC specific GPIO support
   3  *
   4  * Copyright (C) 2011 Gabor Juhos <juhosg@openwrt.org>
   5  *
   6  * This program is free software; you can redistribute it and/or modify it
   7  * under the terms of the GNU General Public License version 2 as published
   8  * by the Free Software Foundation.
   9  */
  10
  11 #ifndef _RAMIPS_GPIO_H
  12 #define _RAMIPS_GPIO_H
  13
  14 #include <linux/gpio.h>
  15 #include <linux/spinlock.h>
  16
  17 enum ramips_gpio_reg {
  18         RAMIPS_GPIO_REG_INT = 0,        /* Interrupt status */
  19         RAMIPS_GPIO_REG_EDGE,
  20         RAMIPS_GPIO_REG_RENA,
  21         RAMIPS_GPIO_REG_FENA,
  22         RAMIPS_GPIO_REG_DATA,
  23         RAMIPS_GPIO_REG_DIR,            /* Direction, 0:in, 1: out */
  24         RAMIPS_GPIO_REG_POL,            /* Polarity, 0: normal, 1: invert */
  25         RAMIPS_GPIO_REG_SET,
  26         RAMIPS_GPIO_REG_RESET,
  27         RAMIPS_GPIO_REG_TOGGLE,
  28         RAMIPS_GPIO_REG_MAX
  29 };
  30
  31 struct ramips_gpio_chip {
  32         struct gpio_chip chip;
  33         unsigned long map_base;
  34         unsigned long map_size;
  35         u8 regs[RAMIPS_GPIO_REG_MAX];
  36
  37         spinlock_t lock;
  38         void __iomem *regs_base;
  39 };
  40
  41 struct ramips_gpio_data {
  42         unsigned int num_chips;
  43         struct ramips_gpio_chip *chips;
  44 };
  45
  46 int ramips_gpio_init(struct ramips_gpio_data *data);
  47
  48 #endif /* _RAMIPS_GPIO_H */