text: /*
   * arizona-ldo1.c  --  LDO1 supply for Arizona devices
   *
   * Copyright 2012 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/module.h>
  #include <linux/moduleparam.h>
  #include <linux/init.h>
  #include <linux/bitops.h>
  #include <linux/err.h>
  #include <linux/platform_device.h>
  #include <linux/regulator/driver.h>
  #include <linux/regulator/machine.h>
  #include <linux/gpio.h>
  #include <linux/slab.h>
  
  #include <linux/mfd/arizona/core.h>
  #include <linux/mfd/arizona/pdata.h>
  #include <linux/mfd/arizona/registers.h>
  
  struct arizona_ldo1 {
  	struct regulator_dev *regulator;
  	struct arizona *arizona;
  
  	struct regulator_consumer_supply supply;
  	struct regulator_init_data init_data;
  };
  
  static struct regulator_ops arizona_ldo1_ops = {
  	.list_voltage = regulator_list_voltage_linear,
  	.map_voltage = regulator_map_voltage_linear,
  	.get_voltage_sel = regulator_get_voltage_sel_regmap,
  	.set_voltage_sel = regulator_set_voltage_sel_regmap,
  	.get_bypass = regulator_get_bypass_regmap,
  	.set_bypass = regulator_set_bypass_regmap,
  };
  
  static const struct regulator_desc arizona_ldo1 = {
  	.name = "LDO1",
  	.supply_name = "LDOVDD",
  	.type = REGULATOR_VOLTAGE,
  	.ops = &arizona_ldo1_ops,
  
  	.vsel_reg = ARIZONA_LDO1_CONTROL_1,
  	.vsel_mask = ARIZONA_LDO1_VSEL_MASK,
  	.bypass_reg = ARIZONA_LDO1_CONTROL_1,
  	.bypass_mask = ARIZONA_LDO1_BYPASS,
  	.min_uV = 900000,
  	.uV_step = 50000,
  	.n_voltages = 6,
  
  	.owner = THIS_MODULE,
  };
  
  static const struct regulator_init_data arizona_ldo1_default = {
  	.constraints = {
  		.valid_ops_mask = REGULATOR_CHANGE_STATUS,
  	},
  	.num_consumer_supplies = 1,
  };
  
  static __devinit int arizona_ldo1_probe(struct platform_device *pdev)
  {
  	struct arizona *arizona = dev_get_drvdata(pdev->dev.parent);
  	struct regulator_config config = { };
  	struct arizona_ldo1 *ldo1;
  	int ret;
  
  	ldo1 = devm_kzalloc(&pdev->dev, sizeof(*ldo1), GFP_KERNEL);
  	if (ldo1 == NULL) {
  		dev_err(&pdev->dev, "Unable to allocate private data\n");
  		return -ENOMEM;
  	}
  
  	ldo1->arizona = arizona;
  
  	/*
  	 * Since the chip usually supplies itself we provide some
  	 * default init_data for it.  This will be overridden with
  	 * platform data if provided.
  	 */
  	ldo1->init_data = arizona_ldo1_default;
  	ldo1->init_data.consumer_supplies = &ldo1->supply;
  	ldo1->supply.supply = "DCVDD";
  	ldo1->supply.dev_name = dev_name(arizona->dev);
  
  	config.dev = arizona->dev;
  	config.driver_data = ldo1;
  	config.regmap = arizona->regmap;
  	config.ena_gpio = arizona->pdata.ldoena;
  
  	if (arizona->pdata.ldo1)
  		config.init_data = arizona->pdata.ldo1;
  	else
  		config.init_data = &ldo1->init_data;
  
  	ldo1->regulator = regulator_register(&arizona_ldo1, &config);
  	if (IS_ERR(ldo1->regulator)) {
  		ret = PTR_ERR(ldo1->regulator);
  		dev_err(arizona->dev, "Failed to register LDO1 supply: %d\n",
  			ret);
  		return ret;
  	}
  
  	platform_set_drvdata(pdev, ldo1);
  
  	return 0;
  }
  
  static __devexit int arizona_ldo1_remove(struct platform_device *pdev)
  {
  	struct arizona_ldo1 *ldo1 = platform_get_drvdata(pdev);
  
  	regulator_unregister(ldo1->regulator);
  
  	return 0;
  }
  
  static struct platform_driver arizona_ldo1_driver = {
  	.probe = arizona_ldo1_probe,
  	.remove = __devexit_p(arizona_ldo1_remove),
  	.driver		= {
  		.name	= "arizona-ldo1",
  		.owner	= THIS_MODULE,
  	},
  };
  
  module_platform_driver(arizona_ldo1_driver);
  
  /* Module information */
  MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");
  MODULE_DESCRIPTION("Arizona LDO1 driver");
  MODULE_LICENSE("GPL");
  MODULE_ALIAS("platform:arizona-ldo1");
  