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 #define MAX_REGS_BANKS          5
  25
  26 struct davinci_gpio_platform_data {
  27         u32     ngpio;
  28         u32     gpio_unbanked;
  29 };
  30
  31 struct davinci_gpio_irq_data {
  32         void __iomem                    *regs;
  33         struct davinci_gpio_controller  *chip;
  34         int                             bank_num;
  35 };
  36
  37 struct davinci_gpio_controller {
  38         struct gpio_chip        chip;
  39         struct irq_domain       *irq_domain;
  40         /* Serialize access to GPIO registers */
  41         spinlock_t              lock;
  42         void __iomem            *regs[MAX_REGS_BANKS];
  43         int                     gpio_unbanked;
  44         unsigned int            base_irq;
  45         unsigned int            base;
  46 };
  47
  48 /*
  49  * basic gpio routines
  50  */
  51 #define GPIO(X)         (X)     /* 0 <= X <= (DAVINCI_N_GPIO - 1) */
  52
  53 /* Convert GPIO signal to GPIO pin number */
  54 #define GPIO_TO_PIN(bank, gpio) (16 * (bank) + (gpio))
  55
  56 static inline u32 __gpio_mask(unsigned gpio)
  57 {
  58         return 1 << (gpio % 32);
  59 }
  60 #endif