drivers/regulator/arizona-micsupp.c - LeafOS-Devices/android_kernel_samsung_gta4xl - Gitiles

 /*
  * arizona-micsupp.c  --  Microphone 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/of.h>
 #include <linux/platform_device.h>
 #include <linux/regulator/driver.h>
 #include <linux/regulator/machine.h>
 #include <linux/regulator/of_regulator.h>
 #include <linux/gpio.h>
 #include <linux/slab.h>
 #include <linux/workqueue.h>
 #include <sound/soc.h>

 #include <linux/mfd/arizona/core.h>
 #include <linux/mfd/arizona/pdata.h>
 #include <linux/mfd/arizona/registers.h>

 #include <linux/mfd/madera/core.h>
 #include <linux/mfd/madera/pdata.h>
 #include <linux/mfd/madera/registers.h>

 #include <linux/regulator/arizona-micsupp.h>

 struct arizona_micsupp {
 	struct regulator_dev *regulator;
 	struct regmap *regmap;
 	struct snd_soc_dapm_context **dapm;
 	unsigned int enable_reg;
 	struct device *dev;

 	struct regulator_consumer_supply supply;
 	struct regulator_init_data init_data;

 	struct work_struct check_cp_work;
 	struct arizona_micsupp_forced_bypass forced_bypass;
 };

 static void arizona_micsupp_check_cp(struct work_struct *work)
 {
 	struct arizona_micsupp *micsupp =
 		container_of(work, struct arizona_micsupp, check_cp_work);
 	struct snd_soc_dapm_context *dapm = *micsupp->dapm;
 	struct snd_soc_component *component;
 	struct arizona_micsupp_forced_bypass *bypass = &micsupp->forced_bypass;
 	bool sync = false;

 	if (dapm) {
 		component = snd_soc_dapm_to_component(dapm);

 		snd_soc_dapm_mutex_lock(dapm);
 		mutex_lock(&bypass->lock);

 		if (!bypass->forced) {
 			if (bypass->enabled && bypass->regulated)
 				snd_soc_component_force_enable_pin_unlocked(
 								component,
 								"MICSUPP");
 			else
 				snd_soc_component_disable_pin_unlocked(
 								component,
 								"MICSUPP");
 			sync = true;
 		}

 		mutex_unlock(&bypass->lock);
 		snd_soc_dapm_mutex_unlock(dapm);

 		if (sync)
 			snd_soc_dapm_sync(dapm);
 	}
 }

 static int arizona_micsupp_enable(struct regulator_dev *rdev)
 {
 	struct arizona_micsupp *micsupp = rdev_get_drvdata(rdev);
 	struct arizona_micsupp_forced_bypass *bypass = &micsupp->forced_bypass;
 	int ret;

 	mutex_lock(&bypass->lock);
 	bypass->enabled = true;
 	ret = regulator_enable_regmap(rdev);
 	mutex_unlock(&bypass->lock);

 	if (ret == 0)
 		schedule_work(&micsupp->check_cp_work);

 	return ret;
 }

 static int arizona_micsupp_disable(struct regulator_dev *rdev)
 {
 	struct arizona_micsupp *micsupp = rdev_get_drvdata(rdev);
 	struct arizona_micsupp_forced_bypass *bypass = &micsupp->forced_bypass;
 	int ret;

 	mutex_lock(&bypass->lock);
 	bypass->enabled = false;
 	ret = regulator_disable_regmap(rdev);
 	mutex_unlock(&bypass->lock);

 	if (ret == 0)
 		schedule_work(&micsupp->check_cp_work);

 	return ret;
 }

 static int arizona_micsupp_set_bypass(struct regulator_dev *rdev, bool ena)
 {
 	struct arizona_micsupp *micsupp = rdev_get_drvdata(rdev);
 	struct arizona_micsupp_forced_bypass *bypass = &micsupp->forced_bypass;
 	int ret = 0;

 	mutex_lock(&bypass->lock);
 	bypass->regulated = !ena;
 	if (!bypass->forced)
 		ret = regulator_set_bypass_regmap(rdev, ena);
 	mutex_unlock(&bypass->lock);

 	if (ret == 0)
 		schedule_work(&micsupp->check_cp_work);

 	return ret;
 }

 static const struct regulator_ops arizona_micsupp_ops = {
 	.enable = arizona_micsupp_enable,
 	.disable = arizona_micsupp_disable,
 	.is_enabled = regulator_is_enabled_regmap,

 	.list_voltage = regulator_list_voltage_linear_range,
 	.map_voltage = regulator_map_voltage_linear_range,

 	.get_voltage_sel = regulator_get_voltage_sel_regmap,
 	.set_voltage_sel = regulator_set_voltage_sel_regmap,

 	.get_bypass = regulator_get_bypass_regmap,
 	.set_bypass = arizona_micsupp_set_bypass,
 };

 static const struct regulator_linear_range arizona_micsupp_ranges[] = {
 	REGULATOR_LINEAR_RANGE(1700000, 0,    0x1e, 50000),
 	REGULATOR_LINEAR_RANGE(3300000, 0x1f, 0x1f, 0),
 };

 static const struct regulator_desc arizona_micsupp = {
 	.name = "MICVDD",
 	.supply_name = "CPVDD",
 	.type = REGULATOR_VOLTAGE,
 	.n_voltages = 32,
 	.ops = &arizona_micsupp_ops,

 	.vsel_reg = ARIZONA_LDO2_CONTROL_1,
 	.vsel_mask = ARIZONA_LDO2_VSEL_MASK,
 	.enable_reg = ARIZONA_MIC_CHARGE_PUMP_1,
 	.enable_mask = ARIZONA_CPMIC_ENA,
 	.bypass_reg = ARIZONA_MIC_CHARGE_PUMP_1,
 	.bypass_mask = ARIZONA_CPMIC_BYPASS,

 	.linear_ranges = arizona_micsupp_ranges,
 	.n_linear_ranges = ARRAY_SIZE(arizona_micsupp_ranges),

 	.enable_time = 3000,

 	.owner = THIS_MODULE,
 };

 static const struct regulator_linear_range arizona_micsupp_ext_ranges[] = {
 	REGULATOR_LINEAR_RANGE(900000,  0,    0x14, 25000),
 	REGULATOR_LINEAR_RANGE(1500000, 0x15, 0x27, 100000),
 };

 static const struct regulator_desc arizona_micsupp_ext = {
 	.name = "MICVDD",
 	.supply_name = "CPVDD",
 	.type = REGULATOR_VOLTAGE,
 	.n_voltages = 40,
 	.ops = &arizona_micsupp_ops,

 	.vsel_reg = ARIZONA_LDO2_CONTROL_1,
 	.vsel_mask = ARIZONA_LDO2_VSEL_MASK,
 	.enable_reg = ARIZONA_MIC_CHARGE_PUMP_1,
 	.enable_mask = ARIZONA_CPMIC_ENA,
 	.bypass_reg = ARIZONA_MIC_CHARGE_PUMP_1,
 	.bypass_mask = ARIZONA_CPMIC_BYPASS,

 	.linear_ranges = arizona_micsupp_ext_ranges,
 	.n_linear_ranges = ARRAY_SIZE(arizona_micsupp_ext_ranges),

 	.enable_time = 3000,

 	.owner = THIS_MODULE,
 };

 static const struct regulator_init_data arizona_micsupp_default = {
 	.constraints = {
 		.valid_ops_mask = REGULATOR_CHANGE_STATUS |
 				REGULATOR_CHANGE_VOLTAGE |
 				REGULATOR_CHANGE_BYPASS,
 		.min_uV = 1700000,
 		.max_uV = 3300000,
 	},

 	.num_consumer_supplies = 1,
 };

 static const struct regulator_init_data arizona_micsupp_ext_default = {
 	.constraints = {
 		.valid_ops_mask = REGULATOR_CHANGE_STATUS |
 				REGULATOR_CHANGE_VOLTAGE |
 				REGULATOR_CHANGE_BYPASS,
 		.min_uV = 900000,
 		.max_uV = 3300000,
 	},

 	.num_consumer_supplies = 1,
 };

 static const struct regulator_desc madera_micsupp = {
 	.name = "MICVDD",
 	.supply_name = "CPVDD1",
 	.type = REGULATOR_VOLTAGE,
 	.n_voltages = 40,
 	.ops = &arizona_micsupp_ops,

 	.vsel_reg = MADERA_LDO2_CONTROL_1,
 	.vsel_mask = MADERA_LDO2_VSEL_MASK,
 	.enable_reg = MADERA_MIC_CHARGE_PUMP_1,
 	.enable_mask = MADERA_CPMIC_ENA,
 	.bypass_reg = MADERA_MIC_CHARGE_PUMP_1,
 	.bypass_mask = MADERA_CPMIC_BYPASS,

 	.linear_ranges = arizona_micsupp_ext_ranges,
 	.n_linear_ranges = ARRAY_SIZE(arizona_micsupp_ext_ranges),

 	.enable_time = 3000,

 	.owner = THIS_MODULE,
 };

 static int arizona_micsupp_of_get_pdata(struct arizona_micsupp_pdata *pdata,
 					struct regulator_config *config,
 					const struct regulator_desc *desc)
 {
 	struct arizona_micsupp *micsupp = config->driver_data;
 	struct device_node *np;
 	struct regulator_init_data *init_data;

 	np = of_get_child_by_name(config->dev->of_node, "micvdd");

 	if (np) {
 		config->of_node = np;

 		init_data = of_get_regulator_init_data(config->dev, np, desc);

 		if (init_data) {
 			init_data->consumer_supplies = &micsupp->supply;
 			init_data->num_consumer_supplies = 1;

 			pdata->init_data = init_data;
 		}
 	}

 	return 0;
 }

 static int arizona_micsupp_common_init(struct platform_device *pdev,
 				       struct arizona_micsupp *micsupp,
 				       const struct regulator_desc *desc,
 				       struct arizona_micsupp_pdata *pdata)
 {
 	struct regulator_config config = { };
 	int ret;

 	INIT_WORK(&micsupp->check_cp_work, arizona_micsupp_check_cp);
 	mutex_init(&micsupp->forced_bypass.lock);

 	micsupp->init_data.consumer_supplies = &micsupp->supply;
 	micsupp->supply.supply = "MICVDD";
 	micsupp->supply.dev_name = dev_name(micsupp->dev);
 	micsupp->enable_reg = desc->enable_reg;

 	config.dev = micsupp->dev;
 	config.driver_data = micsupp;
 	config.regmap = micsupp->regmap;

 	if (IS_ENABLED(CONFIG_OF)) {
 		if (!dev_get_platdata(micsupp->dev)) {
 			ret = arizona_micsupp_of_get_pdata(pdata, &config,
 							   desc);
 			if (ret < 0)
 				return ret;
 		}
 	}

 	if (pdata->init_data)
 		config.init_data = pdata->init_data;
 	else
 		config.init_data = &micsupp->init_data;

 	/* Default to regulated mode */
 	regmap_update_bits(micsupp->regmap, micsupp->enable_reg,
 			   ARIZONA_CPMIC_BYPASS, 0);
 	micsupp->forced_bypass.regulated = true;

 	micsupp->regulator = devm_regulator_register(&pdev->dev,
 						     desc,
 						     &config);

 	of_node_put(config.of_node);

 	if (IS_ERR(micsupp->regulator)) {
 		ret = PTR_ERR(micsupp->regulator);
 		dev_err(micsupp->dev, "Failed to register mic supply: %d\n",
 			ret);
 		return ret;
 	}

 	platform_set_drvdata(pdev, micsupp);

 	return 0;
 }

 static int arizona_micsupp_probe(struct platform_device *pdev)
 {
 	struct arizona *arizona = dev_get_drvdata(pdev->dev.parent);
 	const struct regulator_desc *desc;
 	struct arizona_micsupp *micsupp;

 	micsupp = devm_kzalloc(&pdev->dev, sizeof(*micsupp), GFP_KERNEL);
 	if (!micsupp)
 		return -ENOMEM;

 	micsupp->regmap = arizona->regmap;
 	micsupp->dapm = &arizona->dapm;
 	micsupp->dev = arizona->dev;

 	/*
 	 * Since the chip usually supplies itself we provide some
 	 * default init_data for it.  This will be overridden with
 	 * platform data if provided.
 	 */
 	switch (arizona->type) {
 	case WM5110:
 	case WM8280:
 		desc = &arizona_micsupp_ext;
 		micsupp->init_data = arizona_micsupp_ext_default;
 		break;
 	default:
 		desc = &arizona_micsupp;
 		micsupp->init_data = arizona_micsupp_default;
 		break;
 	}

 	return arizona_micsupp_common_init(pdev, micsupp, desc,
 					   &arizona->pdata.micvdd);
 }

 static int madera_micsupp_probe(struct platform_device *pdev)
 {
 	struct madera *madera = dev_get_drvdata(pdev->dev.parent);
 	struct arizona_micsupp *micsupp;

 	micsupp = devm_kzalloc(&pdev->dev, sizeof(*micsupp), GFP_KERNEL);
 	if (!micsupp)
 		return -ENOMEM;

 	micsupp->regmap = madera->regmap;
 	micsupp->dapm = &madera->dapm;
 	micsupp->dev = madera->dev;
 	micsupp->init_data = arizona_micsupp_ext_default;
 	madera->micsupp_forced_bypass = &micsupp->forced_bypass;

 	return arizona_micsupp_common_init(pdev, micsupp, &madera_micsupp,
 					   &madera->pdata.micvdd);
 }

 static struct platform_driver arizona_micsupp_driver = {
 	.probe = arizona_micsupp_probe,
 	.driver		= {
 		.name	= "arizona-micsupp",
 	},
 };

 static struct platform_driver madera_micsupp_driver = {
 	.probe = madera_micsupp_probe,
 	.driver		= {
 		.name	= "madera-micsupp",
 		.suppress_bind_attrs = true,
 	},
 };

 static struct platform_driver * const arizona_micsupp_drivers[] = {
 	&arizona_micsupp_driver,
 	&madera_micsupp_driver,
 };

 static int __init arizona_micsupp_init(void)
 {
 	return platform_register_drivers(arizona_micsupp_drivers,
 					 ARRAY_SIZE(arizona_micsupp_drivers));
 }
 module_init(arizona_micsupp_init);

 static void __exit arizona_micsupp_exit(void)
 {
 	platform_unregister_drivers(arizona_micsupp_drivers,
 				    ARRAY_SIZE(arizona_micsupp_drivers));
 }
 module_exit(arizona_micsupp_exit);

 /* Module information */
 MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");
 MODULE_DESCRIPTION("Arizona microphone supply driver");
 MODULE_LICENSE("GPL");
 MODULE_ALIAS("platform:arizona-micsupp");
 MODULE_ALIAS("platform:madera-micsupp");
	/*
	* arizona-micsupp.c -- Microphone 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/of.h>
	#include <linux/platform_device.h>
	#include <linux/regulator/driver.h>
	#include <linux/regulator/machine.h>
	#include <linux/regulator/of_regulator.h>
	#include <linux/gpio.h>
	#include <linux/slab.h>
	#include <linux/workqueue.h>
	#include <sound/soc.h>

	#include <linux/mfd/arizona/core.h>
	#include <linux/mfd/arizona/pdata.h>
	#include <linux/mfd/arizona/registers.h>

	#include <linux/mfd/madera/core.h>
	#include <linux/mfd/madera/pdata.h>
	#include <linux/mfd/madera/registers.h>

	#include <linux/regulator/arizona-micsupp.h>

	struct arizona_micsupp {
	struct regulator_dev *regulator;
	struct regmap *regmap;
	struct snd_soc_dapm_context **dapm;
	unsigned int enable_reg;
	struct device *dev;

	struct regulator_consumer_supply supply;
	struct regulator_init_data init_data;

	struct work_struct check_cp_work;
	struct arizona_micsupp_forced_bypass forced_bypass;
	};

	static void arizona_micsupp_check_cp(struct work_struct *work)
	{
	struct arizona_micsupp *micsupp =
	container_of(work, struct arizona_micsupp, check_cp_work);
	struct snd_soc_dapm_context dapm = micsupp->dapm;
	struct snd_soc_component *component;
	struct arizona_micsupp_forced_bypass *bypass = &micsupp->forced_bypass;
	bool sync = false;

	if (dapm) {
	component = snd_soc_dapm_to_component(dapm);

	snd_soc_dapm_mutex_lock(dapm);
	mutex_lock(&bypass->lock);

	if (!bypass->forced) {
	if (bypass->enabled && bypass->regulated)
	snd_soc_component_force_enable_pin_unlocked(
	component,
	"MICSUPP");
	else
	snd_soc_component_disable_pin_unlocked(
	component,
	"MICSUPP");
	sync = true;
	}

	mutex_unlock(&bypass->lock);
	snd_soc_dapm_mutex_unlock(dapm);

	if (sync)
	snd_soc_dapm_sync(dapm);
	}
	}

	static int arizona_micsupp_enable(struct regulator_dev *rdev)
	{
	struct arizona_micsupp *micsupp = rdev_get_drvdata(rdev);
	struct arizona_micsupp_forced_bypass *bypass = &micsupp->forced_bypass;
	int ret;

	mutex_lock(&bypass->lock);
	bypass->enabled = true;
	ret = regulator_enable_regmap(rdev);
	mutex_unlock(&bypass->lock);

	if (ret == 0)
	schedule_work(&micsupp->check_cp_work);

	return ret;
	}

	static int arizona_micsupp_disable(struct regulator_dev *rdev)
	{
	struct arizona_micsupp *micsupp = rdev_get_drvdata(rdev);
	struct arizona_micsupp_forced_bypass *bypass = &micsupp->forced_bypass;
	int ret;

	mutex_lock(&bypass->lock);
	bypass->enabled = false;
	ret = regulator_disable_regmap(rdev);
	mutex_unlock(&bypass->lock);

	if (ret == 0)
	schedule_work(&micsupp->check_cp_work);

	return ret;
	}

	static int arizona_micsupp_set_bypass(struct regulator_dev *rdev, bool ena)
	{
	struct arizona_micsupp *micsupp = rdev_get_drvdata(rdev);
	struct arizona_micsupp_forced_bypass *bypass = &micsupp->forced_bypass;
	int ret = 0;

	mutex_lock(&bypass->lock);
	bypass->regulated = !ena;
	if (!bypass->forced)
	ret = regulator_set_bypass_regmap(rdev, ena);
	mutex_unlock(&bypass->lock);

	if (ret == 0)
	schedule_work(&micsupp->check_cp_work);

	return ret;
	}

	static const struct regulator_ops arizona_micsupp_ops = {
	.enable = arizona_micsupp_enable,
	.disable = arizona_micsupp_disable,
	.is_enabled = regulator_is_enabled_regmap,

	.list_voltage = regulator_list_voltage_linear_range,
	.map_voltage = regulator_map_voltage_linear_range,

	.get_voltage_sel = regulator_get_voltage_sel_regmap,
	.set_voltage_sel = regulator_set_voltage_sel_regmap,

	.get_bypass = regulator_get_bypass_regmap,
	.set_bypass = arizona_micsupp_set_bypass,
	};

	static const struct regulator_linear_range arizona_micsupp_ranges[] = {
	REGULATOR_LINEAR_RANGE(1700000, 0, 0x1e, 50000),
	REGULATOR_LINEAR_RANGE(3300000, 0x1f, 0x1f, 0),
	};

	static const struct regulator_desc arizona_micsupp = {
	.name = "MICVDD",
	.supply_name = "CPVDD",
	.type = REGULATOR_VOLTAGE,
	.n_voltages = 32,
	.ops = &arizona_micsupp_ops,

	.vsel_reg = ARIZONA_LDO2_CONTROL_1,
	.vsel_mask = ARIZONA_LDO2_VSEL_MASK,
	.enable_reg = ARIZONA_MIC_CHARGE_PUMP_1,
	.enable_mask = ARIZONA_CPMIC_ENA,
	.bypass_reg = ARIZONA_MIC_CHARGE_PUMP_1,
	.bypass_mask = ARIZONA_CPMIC_BYPASS,

	.linear_ranges = arizona_micsupp_ranges,
	.n_linear_ranges = ARRAY_SIZE(arizona_micsupp_ranges),

	.enable_time = 3000,

	.owner = THIS_MODULE,
	};

	static const struct regulator_linear_range arizona_micsupp_ext_ranges[] = {
	REGULATOR_LINEAR_RANGE(900000, 0, 0x14, 25000),
	REGULATOR_LINEAR_RANGE(1500000, 0x15, 0x27, 100000),
	};

	static const struct regulator_desc arizona_micsupp_ext = {
	.name = "MICVDD",
	.supply_name = "CPVDD",
	.type = REGULATOR_VOLTAGE,
	.n_voltages = 40,
	.ops = &arizona_micsupp_ops,

	.vsel_reg = ARIZONA_LDO2_CONTROL_1,
	.vsel_mask = ARIZONA_LDO2_VSEL_MASK,
	.enable_reg = ARIZONA_MIC_CHARGE_PUMP_1,
	.enable_mask = ARIZONA_CPMIC_ENA,
	.bypass_reg = ARIZONA_MIC_CHARGE_PUMP_1,
	.bypass_mask = ARIZONA_CPMIC_BYPASS,

	.linear_ranges = arizona_micsupp_ext_ranges,
	.n_linear_ranges = ARRAY_SIZE(arizona_micsupp_ext_ranges),

	.enable_time = 3000,

	.owner = THIS_MODULE,
	};

	static const struct regulator_init_data arizona_micsupp_default = {
	.constraints = {
	.valid_ops_mask = REGULATOR_CHANGE_STATUS \|
	REGULATOR_CHANGE_VOLTAGE \|
	REGULATOR_CHANGE_BYPASS,
	.min_uV = 1700000,
	.max_uV = 3300000,
	},

	.num_consumer_supplies = 1,
	};

	static const struct regulator_init_data arizona_micsupp_ext_default = {
	.constraints = {
	.valid_ops_mask = REGULATOR_CHANGE_STATUS \|
	REGULATOR_CHANGE_VOLTAGE \|
	REGULATOR_CHANGE_BYPASS,
	.min_uV = 900000,
	.max_uV = 3300000,
	},

	.num_consumer_supplies = 1,
	};

	static const struct regulator_desc madera_micsupp = {
	.name = "MICVDD",
	.supply_name = "CPVDD1",
	.type = REGULATOR_VOLTAGE,
	.n_voltages = 40,
	.ops = &arizona_micsupp_ops,

	.vsel_reg = MADERA_LDO2_CONTROL_1,
	.vsel_mask = MADERA_LDO2_VSEL_MASK,
	.enable_reg = MADERA_MIC_CHARGE_PUMP_1,
	.enable_mask = MADERA_CPMIC_ENA,
	.bypass_reg = MADERA_MIC_CHARGE_PUMP_1,
	.bypass_mask = MADERA_CPMIC_BYPASS,

	.linear_ranges = arizona_micsupp_ext_ranges,
	.n_linear_ranges = ARRAY_SIZE(arizona_micsupp_ext_ranges),

	.enable_time = 3000,

	.owner = THIS_MODULE,
	};

	static int arizona_micsupp_of_get_pdata(struct arizona_micsupp_pdata *pdata,
	struct regulator_config *config,
	const struct regulator_desc *desc)
	{
	struct arizona_micsupp *micsupp = config->driver_data;
	struct device_node *np;
	struct regulator_init_data *init_data;

	np = of_get_child_by_name(config->dev->of_node, "micvdd");

	if (np) {
	config->of_node = np;

	init_data = of_get_regulator_init_data(config->dev, np, desc);

	if (init_data) {
	init_data->consumer_supplies = &micsupp->supply;
	init_data->num_consumer_supplies = 1;

	pdata->init_data = init_data;
	}
	}

	return 0;
	}

	static int arizona_micsupp_common_init(struct platform_device *pdev,
	struct arizona_micsupp *micsupp,
	const struct regulator_desc *desc,
	struct arizona_micsupp_pdata *pdata)
	{
	struct regulator_config config = { };
	int ret;

	INIT_WORK(&micsupp->check_cp_work, arizona_micsupp_check_cp);
	mutex_init(&micsupp->forced_bypass.lock);

	micsupp->init_data.consumer_supplies = &micsupp->supply;
	micsupp->supply.supply = "MICVDD";
	micsupp->supply.dev_name = dev_name(micsupp->dev);
	micsupp->enable_reg = desc->enable_reg;

	config.dev = micsupp->dev;
	config.driver_data = micsupp;
	config.regmap = micsupp->regmap;

	if (IS_ENABLED(CONFIG_OF)) {
	if (!dev_get_platdata(micsupp->dev)) {
	ret = arizona_micsupp_of_get_pdata(pdata, &config,
	desc);
	if (ret < 0)
	return ret;
	}
	}

	if (pdata->init_data)
	config.init_data = pdata->init_data;
	else
	config.init_data = &micsupp->init_data;

	/* Default to regulated mode */
	regmap_update_bits(micsupp->regmap, micsupp->enable_reg,
	ARIZONA_CPMIC_BYPASS, 0);
	micsupp->forced_bypass.regulated = true;

	micsupp->regulator = devm_regulator_register(&pdev->dev,
	desc,
	&config);

	of_node_put(config.of_node);

	if (IS_ERR(micsupp->regulator)) {
	ret = PTR_ERR(micsupp->regulator);
	dev_err(micsupp->dev, "Failed to register mic supply: %d\n",
	ret);
	return ret;
	}

	platform_set_drvdata(pdev, micsupp);

	return 0;
	}

	static int arizona_micsupp_probe(struct platform_device *pdev)
	{
	struct arizona *arizona = dev_get_drvdata(pdev->dev.parent);
	const struct regulator_desc *desc;
	struct arizona_micsupp *micsupp;

	micsupp = devm_kzalloc(&pdev->dev, sizeof(*micsupp), GFP_KERNEL);
	if (!micsupp)
	return -ENOMEM;

	micsupp->regmap = arizona->regmap;
	micsupp->dapm = &arizona->dapm;
	micsupp->dev = arizona->dev;

	/*
	* Since the chip usually supplies itself we provide some
	* default init_data for it. This will be overridden with
	* platform data if provided.
	*/
	switch (arizona->type) {
	case WM5110:
	case WM8280:
	desc = &arizona_micsupp_ext;
	micsupp->init_data = arizona_micsupp_ext_default;
	break;
	default:
	desc = &arizona_micsupp;
	micsupp->init_data = arizona_micsupp_default;
	break;
	}

	return arizona_micsupp_common_init(pdev, micsupp, desc,
	&arizona->pdata.micvdd);
	}

	static int madera_micsupp_probe(struct platform_device *pdev)
	{
	struct madera *madera = dev_get_drvdata(pdev->dev.parent);
	struct arizona_micsupp *micsupp;

	micsupp = devm_kzalloc(&pdev->dev, sizeof(*micsupp), GFP_KERNEL);
	if (!micsupp)
	return -ENOMEM;

	micsupp->regmap = madera->regmap;
	micsupp->dapm = &madera->dapm;
	micsupp->dev = madera->dev;
	micsupp->init_data = arizona_micsupp_ext_default;
	madera->micsupp_forced_bypass = &micsupp->forced_bypass;

	return arizona_micsupp_common_init(pdev, micsupp, &madera_micsupp,
	&madera->pdata.micvdd);
	}

	static struct platform_driver arizona_micsupp_driver = {
	.probe = arizona_micsupp_probe,
	.driver = {
	.name = "arizona-micsupp",
	},
	};

	static struct platform_driver madera_micsupp_driver = {
	.probe = madera_micsupp_probe,
	.driver = {
	.name = "madera-micsupp",
	.suppress_bind_attrs = true,
	},
	};

	static struct platform_driver * const arizona_micsupp_drivers[] = {
	&arizona_micsupp_driver,
	&madera_micsupp_driver,
	};

	static int __init arizona_micsupp_init(void)
	{
	return platform_register_drivers(arizona_micsupp_drivers,
	ARRAY_SIZE(arizona_micsupp_drivers));
	}
	module_init(arizona_micsupp_init);

	static void __exit arizona_micsupp_exit(void)
	{
	platform_unregister_drivers(arizona_micsupp_drivers,
	ARRAY_SIZE(arizona_micsupp_drivers));
	}
	module_exit(arizona_micsupp_exit);

	/* Module information */
	MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");
	MODULE_DESCRIPTION("Arizona microphone supply driver");
	MODULE_LICENSE("GPL");
	MODULE_ALIAS("platform:arizona-micsupp");
	MODULE_ALIAS("platform:madera-micsupp");