/*
   * arch/arm/plat-iop/gpio.c
   * GPIO handling for Intel IOP3xx processors.
   *
   * Copyright (C) 2006 Lennert Buytenhek <buytenh@wantstofly.org>
   *
   * This program is free software; you can redistribute it and/or modify
   * it under the terms of the GNU General Public License as published by
   * the Free Software Foundation; either version 2 of the License, or (at
   * your option) any later version.
   */

  #include <linux/err.h>
  #include <linux/module.h>
  #include <linux/gpio/driver.h>

  #include <linux/platform_device.h>

  #define IOP3XX_GPOE	0x0000
  #define IOP3XX_GPID	0x0004
  #define IOP3XX_GPOD	0x0008

  static int iop3xx_gpio_probe(struct platform_device *pdev)

  {

  	struct resource *res;

  	struct gpio_chip *gc;
  	void __iomem *base;
  	int err;
  
  	gc = devm_kzalloc(&pdev->dev, sizeof(*gc), GFP_KERNEL);
  	if (!gc)
  		return -ENOMEM;

  
  	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);

  	base = devm_ioremap_resource(&pdev->dev, res);

  	if (IS_ERR(base))
  		return PTR_ERR(base);

  	err = bgpio_init(gc, &pdev->dev, 1, base + IOP3XX_GPID,
  			 base + IOP3XX_GPOD, NULL, NULL, base + IOP3XX_GPOE, 0);
  	if (err)
  		return err;
  
  	gc->base = 0;
  	gc->owner = THIS_MODULE;
  
  	return devm_gpiochip_add_data(&pdev->dev, gc, NULL);

  }

  
  static struct platform_driver iop3xx_gpio_driver = {
  	.driver = {
  		.name = "gpio-iop",

  	},
  	.probe = iop3xx_gpio_probe,
  };
  
  static int __init iop3xx_gpio_init(void)
  {
  	return platform_driver_register(&iop3xx_gpio_driver);
  }
  arch_initcall(iop3xx_gpio_init);

  
  MODULE_DESCRIPTION("GPIO handling for Intel IOP3xx processors");
  MODULE_AUTHOR("Lennert Buytenhek <buytenh@wantstofly.org>");
  MODULE_LICENSE("GPL");