include/linux/platform_data/gpio-davinci.h

   1 /*
   2  * DaVinci GPIO Platform Related Defines
   3  *
   4  * Copyright (C) 2013 Texas Instruments Incorporated - http://www.ti.com/
   5  *
   6  * This program is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU General Public License as
   8  * published by the Free Software Foundation version 2.
   9  *
  10  * This program is distributed "as is" WITHOUT ANY WARRANTY of any
  11  * kind, whether express or implied; without even the implied warranty
  12  * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  */
  15
  16 #ifndef __DAVINCI_GPIO_PLATFORM_H
  17 #define __DAVINCI_GPIO_PLATFORM_H
  18
  19 #include <linux/io.h>
  20 #include <linux/spinlock.h>
  21
  22 #include <asm-generic/gpio.h>
  23
  24 struct davinci_gpio_platform_data {
  25         u32     ngpio;
  26         u32     gpio_unbanked;
  27 };
  28
  29
  30 struct davinci_gpio_controller {
  31         struct gpio_chip        chip;
  32         struct irq_domain       *irq_domain;
  33         /* Serialize access to GPIO registers */
  34         spinlock_t              lock;
  35         void __iomem            *regs;
  36         void __iomem            *set_data;
  37         void __iomem            *clr_data;
  38         void __iomem            *in_data;
  39         int                     gpio_unbanked;
  40         unsigned                gpio_irq;
  41 };
  42
  43 /*
  44  * basic gpio routines
  45  */
  46 #define GPIO(X)         (X)     /* 0 <= X <= (DAVINCI_N_GPIO - 1) */
  47
  48 /* Convert GPIO signal to GPIO pin number */
  49 #define GPIO_TO_PIN(bank, gpio) (16 * (bank) + (gpio))
  50
  51 static inline u32 __gpio_mask(unsigned gpio)
  52 {
  53         return 1 << (gpio % 32);
  54 }
  55 #endif