drivers/regulator/arizona-micsupp.c - nest-cam/v366/kernel_backports - Git at Google

 /*
  * 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/platform_device.h>
 #include <linux/regulator/driver.h>
 #include <linux/regulator/machine.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>

 struct arizona_micsupp {
 	struct regulator_dev *regulator;
 	struct arizona *arizona;

 	struct regulator_consumer_supply supply;
 	struct regulator_init_data init_data;

 	struct work_struct check_cp_work;
 };

 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->arizona->dapm;
 	struct arizona *arizona = micsupp->arizona;
 	struct regmap *regmap = arizona->regmap;
 	unsigned int reg;
 	int ret;

 	ret = regmap_read(regmap, ARIZONA_MIC_CHARGE_PUMP_1, &reg);
 	if (ret != 0) {
 		dev_err(arizona->dev, "Failed to read CP state: %d\n", ret);
 		return;
 	}

 	if (dapm) {
 		if ((reg & (ARIZONA_CPMIC_ENA | ARIZONA_CPMIC_BYPASS)) ==
 		    ARIZONA_CPMIC_ENA)
 			snd_soc_dapm_force_enable_pin(dapm, "MICSUPP");
 		else
 			snd_soc_dapm_disable_pin(dapm, "MICSUPP");

 		snd_soc_dapm_sync(dapm);
 	}
 }

 static int arizona_micsupp_enable(struct regulator_dev *rdev)
 {
 	struct arizona_micsupp *micsupp = rdev_get_drvdata(rdev);
 	int ret;

 	ret = regulator_enable_regmap(rdev);

 	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);
 	int ret;

 	ret = regulator_disable_regmap(rdev);
 	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);
 	int ret;

 	ret = regulator_set_bypass_regmap(rdev, ena);
 	if (ret == 0)
 		schedule_work(&micsupp->check_cp_work);

 	return ret;
 }

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

 	micsupp = devm_kzalloc(&pdev->dev, sizeof(*micsupp), GFP_KERNEL);
 	if (micsupp == NULL) {
 		dev_err(&pdev->dev, "Unable to allocate private data\n");
 		return -ENOMEM;
 	}

 	micsupp->arizona = arizona;
 	INIT_WORK(&micsupp->check_cp_work, arizona_micsupp_check_cp);

 	/*
 	 * 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:
 		desc = &arizona_micsupp_ext;
 		micsupp->init_data = arizona_micsupp_ext_default;
 		break;
 	default:
 		desc = &arizona_micsupp;
 		micsupp->init_data = arizona_micsupp_default;
 		break;
 	}

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

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

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

 	/* Default to regulated mode until the API supports bypass */
 	regmap_update_bits(arizona->regmap, ARIZONA_MIC_CHARGE_PUMP_1,
 			   ARIZONA_CPMIC_BYPASS, 0);

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

 	platform_set_drvdata(pdev, micsupp);

 	return 0;
 }

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

 module_platform_driver(arizona_micsupp_driver);

 /* Module information */
 MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");
 MODULE_DESCRIPTION("Arizona microphone supply driver");
 MODULE_LICENSE("GPL");
 MODULE_ALIAS("platform:arizona-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/platform_device.h>
	#include <linux/regulator/driver.h>
	#include <linux/regulator/machine.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>

	struct arizona_micsupp {
	struct regulator_dev *regulator;
	struct arizona *arizona;

	struct regulator_consumer_supply supply;
	struct regulator_init_data init_data;

	struct work_struct check_cp_work;
	};

	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->arizona->dapm;
	struct arizona *arizona = micsupp->arizona;
	struct regmap *regmap = arizona->regmap;
	unsigned int reg;
	int ret;

	ret = regmap_read(regmap, ARIZONA_MIC_CHARGE_PUMP_1, &reg);
	if (ret != 0) {
	dev_err(arizona->dev, "Failed to read CP state: %d\n", ret);
	return;
	}

	if (dapm) {
	if ((reg & (ARIZONA_CPMIC_ENA \| ARIZONA_CPMIC_BYPASS)) ==
	ARIZONA_CPMIC_ENA)
	snd_soc_dapm_force_enable_pin(dapm, "MICSUPP");
	else
	snd_soc_dapm_disable_pin(dapm, "MICSUPP");

	snd_soc_dapm_sync(dapm);
	}
	}

	static int arizona_micsupp_enable(struct regulator_dev *rdev)
	{
	struct arizona_micsupp *micsupp = rdev_get_drvdata(rdev);
	int ret;

	ret = regulator_enable_regmap(rdev);

	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);
	int ret;

	ret = regulator_disable_regmap(rdev);
	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);
	int ret;

	ret = regulator_set_bypass_regmap(rdev, ena);
	if (ret == 0)
	schedule_work(&micsupp->check_cp_work);

	return ret;
	}

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

	micsupp = devm_kzalloc(&pdev->dev, sizeof(*micsupp), GFP_KERNEL);
	if (micsupp == NULL) {
	dev_err(&pdev->dev, "Unable to allocate private data\n");
	return -ENOMEM;
	}

	micsupp->arizona = arizona;
	INIT_WORK(&micsupp->check_cp_work, arizona_micsupp_check_cp);

	/*
	* 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:
	desc = &arizona_micsupp_ext;
	micsupp->init_data = arizona_micsupp_ext_default;
	break;
	default:
	desc = &arizona_micsupp;
	micsupp->init_data = arizona_micsupp_default;
	break;
	}

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

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

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

	/* Default to regulated mode until the API supports bypass */
	regmap_update_bits(arizona->regmap, ARIZONA_MIC_CHARGE_PUMP_1,
	ARIZONA_CPMIC_BYPASS, 0);

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

	platform_set_drvdata(pdev, micsupp);

	return 0;
	}

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

	module_platform_driver(arizona_micsupp_driver);

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