/*
   * wm831x-spi.c  --  SPI access for Wolfson WM831x PMICs
   *
   * Copyright 2009,2010 Wolfson Microelectronics PLC.
   *
   * Author: Mark Brown <broonie@opensource.wolfsonmicro.com>
   *
   *  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/pm.h>

  #include <linux/spi/spi.h>

  #include <linux/regmap.h>
  #include <linux/err.h>

  
  #include <linux/mfd/wm831x/core.h>

  static int __devinit wm831x_spi_probe(struct spi_device *spi)
  {

  	const struct spi_device_id *id = spi_get_device_id(spi);

  	struct wm831x *wm831x;
  	enum wm831x_parent type;

  	int ret;

  	type = (enum wm831x_parent)id->driver_data;

  
  	wm831x = kzalloc(sizeof(struct wm831x), GFP_KERNEL);
  	if (wm831x == NULL)
  		return -ENOMEM;
  
  	spi->bits_per_word = 16;
  	spi->mode = SPI_MODE_0;
  
  	dev_set_drvdata(&spi->dev, wm831x);
  	wm831x->dev = &spi->dev;

  	wm831x->regmap = regmap_init_spi(spi, &wm831x_regmap_config);

  	if (IS_ERR(wm831x->regmap)) {
  		ret = PTR_ERR(wm831x->regmap);
  		dev_err(wm831x->dev, "Failed to allocate register map: %d
  ",
  			ret);
  		kfree(wm831x);
  		return ret;
  	}

  
  	return wm831x_device_init(wm831x, type, spi->irq);
  }
  
  static int __devexit wm831x_spi_remove(struct spi_device *spi)
  {
  	struct wm831x *wm831x = dev_get_drvdata(&spi->dev);
  
  	wm831x_device_exit(wm831x);
  
  	return 0;
  }

  static int wm831x_spi_suspend(struct device *dev)

  {

  	struct wm831x *wm831x = dev_get_drvdata(dev);

  
  	return wm831x_device_suspend(wm831x);
  }

  static void wm831x_spi_shutdown(struct spi_device *spi)
  {
  	struct wm831x *wm831x = dev_get_drvdata(&spi->dev);
  
  	wm831x_device_shutdown(wm831x);
  }

  static const struct dev_pm_ops wm831x_spi_pm = {
  	.freeze = wm831x_spi_suspend,
  	.suspend = wm831x_spi_suspend,
  };

  static const struct spi_device_id wm831x_spi_ids[] = {
  	{ "wm8310", WM8310 },
  	{ "wm8311", WM8311 },
  	{ "wm8312", WM8312 },
  	{ "wm8320", WM8320 },
  	{ "wm8321", WM8321 },
  	{ "wm8325", WM8325 },
  	{ "wm8326", WM8326 },
  	{ },

  };

  MODULE_DEVICE_TABLE(spi, wm831x_spi_id);

  static struct spi_driver wm831x_spi_driver = {

  	.driver = {

  		.name	= "wm831x",

  		.bus	= &spi_bus_type,
  		.owner	= THIS_MODULE,

  		.pm	= &wm831x_spi_pm,

  	},

  	.id_table	= wm831x_spi_ids,

  	.probe		= wm831x_spi_probe,
  	.remove		= __devexit_p(wm831x_spi_remove),

  	.shutdown	= wm831x_spi_shutdown,

  };

  static int __init wm831x_spi_init(void)
  {
  	int ret;

  	ret = spi_register_driver(&wm831x_spi_driver);

  	if (ret != 0)

  		pr_err("Failed to register WM831x SPI driver: %d
  ", ret);

  	return 0;
  }
  subsys_initcall(wm831x_spi_init);
  
  static void __exit wm831x_spi_exit(void)
  {

  	spi_unregister_driver(&wm831x_spi_driver);

  }
  module_exit(wm831x_spi_exit);
  
  MODULE_DESCRIPTION("SPI support for WM831x/2x AudioPlus PMICs");
  MODULE_LICENSE("GPL");
  MODULE_AUTHOR("Mark Brown");