/*

   * TI TPS6591x GPIO driver

   *
   * Copyright 2010 Texas Instruments Inc.
   *
   * Author: Graeme Gregory <gg@slimlogic.co.uk>
   * Author: Jorge Eduardo Candelaria jedu@slimlogic.co.uk>
   *
   *  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/kernel.h>
  #include <linux/module.h>
  #include <linux/errno.h>
  #include <linux/gpio.h>
  #include <linux/i2c.h>
  #include <linux/mfd/tps65910.h>
  
  static int tps65910_gpio_get(struct gpio_chip *gc, unsigned offset)
  {
  	struct tps65910 *tps65910 = container_of(gc, struct tps65910, gpio);
  	uint8_t val;

  	tps65910->read(tps65910, TPS65910_GPIO0 + offset, 1, &val);

  	if (val & GPIO_STS_MASK)

  		return 1;
  
  	return 0;
  }
  
  static void tps65910_gpio_set(struct gpio_chip *gc, unsigned offset,
  			      int value)
  {
  	struct tps65910 *tps65910 = container_of(gc, struct tps65910, gpio);
  
  	if (value)

  		tps65910_set_bits(tps65910, TPS65910_GPIO0 + offset,
  						GPIO_SET_MASK);

  	else

  		tps65910_clear_bits(tps65910, TPS65910_GPIO0 + offset,
  						GPIO_SET_MASK);

  }
  
  static int tps65910_gpio_output(struct gpio_chip *gc, unsigned offset,
  				int value)
  {
  	struct tps65910 *tps65910 = container_of(gc, struct tps65910, gpio);
  
  	/* Set the initial value */
  	tps65910_gpio_set(gc, 0, value);

  	return tps65910_set_bits(tps65910, TPS65910_GPIO0 + offset,
  						GPIO_CFG_MASK);

  }
  
  static int tps65910_gpio_input(struct gpio_chip *gc, unsigned offset)
  {
  	struct tps65910 *tps65910 = container_of(gc, struct tps65910, gpio);

  	return tps65910_clear_bits(tps65910, TPS65910_GPIO0 + offset,
  						GPIO_CFG_MASK);

  }
  
  void tps65910_gpio_init(struct tps65910 *tps65910, int gpio_base)
  {
  	int ret;
  
  	if (!gpio_base)
  		return;
  
  	tps65910->gpio.owner		= THIS_MODULE;
  	tps65910->gpio.label		= tps65910->i2c_client->name;
  	tps65910->gpio.dev		= tps65910->dev;
  	tps65910->gpio.base		= gpio_base;

  
  	switch(tps65910_chip_id(tps65910)) {
  	case TPS65910:
  		tps65910->gpio.ngpio	= 6;

  		break;

  	case TPS65911:
  		tps65910->gpio.ngpio	= 9;

  		break;

  	default:
  		return;
  	}

  	tps65910->gpio.can_sleep	= 1;
  
  	tps65910->gpio.direction_input	= tps65910_gpio_input;
  	tps65910->gpio.direction_output	= tps65910_gpio_output;
  	tps65910->gpio.set		= tps65910_gpio_set;
  	tps65910->gpio.get		= tps65910_gpio_get;
  
  	ret = gpiochip_add(&tps65910->gpio);
  
  	if (ret)
  		dev_warn(tps65910->dev, "GPIO registration failed: %d
  ", ret);
  }