drivers/regulator/arizona-ldo1.c - kernel/common - Git at Google

 /*
  * arizona-ldo1.c  --  LDO1 supply for Arizona devices
  *
  * Copyright 2012 Wolfson Microelectronics PLC.
  *
  * Author: Mark Brown <[email protected]>
  *
  *  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/gpio/consumer.h>
 #include <linux/platform_device.h>
 #include <linux/regulator/driver.h>
 #include <linux/regulator/machine.h>
 #include <linux/regulator/of_regulator.h>
 #include <linux/slab.h>

 #include <linux/regulator/arizona-ldo1.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 regmap *regmap;

 	struct regulator_consumer_supply supply;
 	struct regulator_init_data init_data;

 	struct gpio_desc *ena_gpiod;
 };

 static int arizona_ldo1_hc_set_voltage_sel(struct regulator_dev *rdev,
 					   unsigned sel)
 {
 	struct regmap *regmap = rdev_get_regmap(rdev);
 	unsigned int val;
 	int ret;

 	if (sel == rdev->desc->n_voltages - 1)
 		val = ARIZONA_LDO1_HI_PWR;
 	else
 		val = 0;

 	ret = regmap_update_bits(regmap, ARIZONA_LDO1_CONTROL_2,
 				 ARIZONA_LDO1_HI_PWR, val);
 	if (ret != 0)
 		return ret;

 	if (val)
 		return 0;

 	return regulator_set_voltage_sel_regmap(rdev, sel);
 }

 static int arizona_ldo1_hc_get_voltage_sel(struct regulator_dev *rdev)
 {
 	struct regmap *regmap = rdev_get_regmap(rdev);
 	unsigned int val;
 	int ret;

 	ret = regmap_read(regmap, ARIZONA_LDO1_CONTROL_2, &val);
 	if (ret != 0)
 		return ret;

 	if (val & ARIZONA_LDO1_HI_PWR)
 		return rdev->desc->n_voltages - 1;

 	return regulator_get_voltage_sel_regmap(rdev);
 }

 static const struct regulator_ops arizona_ldo1_hc_ops = {
 	.list_voltage = regulator_list_voltage_linear_range,
 	.map_voltage = regulator_map_voltage_linear_range,
 	.get_voltage_sel = arizona_ldo1_hc_get_voltage_sel,
 	.set_voltage_sel = arizona_ldo1_hc_set_voltage_sel,
 	.get_bypass = regulator_get_bypass_regmap,
 	.set_bypass = regulator_set_bypass_regmap,
 };

 static const struct regulator_linear_range arizona_ldo1_hc_ranges[] = {
 	REGULATOR_LINEAR_RANGE(900000, 0, 0x6, 50000),
 	REGULATOR_LINEAR_RANGE(1800000, 0x7, 0x7, 0),
 };

 static const struct regulator_desc arizona_ldo1_hc = {
 	.name = "LDO1",
 	.supply_name = "LDOVDD",
 	.type = REGULATOR_VOLTAGE,
 	.ops = &arizona_ldo1_hc_ops,

 	.vsel_reg = ARIZONA_LDO1_CONTROL_1,
 	.vsel_mask = ARIZONA_LDO1_VSEL_MASK,
 	.bypass_reg = ARIZONA_LDO1_CONTROL_1,
 	.bypass_mask = ARIZONA_LDO1_BYPASS,
 	.linear_ranges = arizona_ldo1_hc_ranges,
 	.n_linear_ranges = ARRAY_SIZE(arizona_ldo1_hc_ranges),
 	.n_voltages = 8,
 	.enable_time = 1500,
 	.ramp_delay = 24000,

 	.owner = THIS_MODULE,
 };

 static const 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,
 };

 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,
 	.min_uV = 900000,
 	.uV_step = 25000,
 	.n_voltages = 13,
 	.enable_time = 500,
 	.ramp_delay = 24000,

 	.owner = THIS_MODULE,
 };

 static const struct regulator_init_data arizona_ldo1_dvfs = {
 	.constraints = {
 		.min_uV = 1200000,
 		.max_uV = 1800000,
 		.valid_ops_mask = REGULATOR_CHANGE_STATUS |
 				  REGULATOR_CHANGE_VOLTAGE,
 	},
 	.num_consumer_supplies = 1,
 };

 static const struct regulator_init_data arizona_ldo1_default = {
 	.constraints = {
 		.valid_ops_mask = REGULATOR_CHANGE_STATUS,
 	},
 	.num_consumer_supplies = 1,
 };

 static const struct regulator_init_data arizona_ldo1_wm5110 = {
 	.constraints = {
 		.min_uV = 1175000,
 		.max_uV = 1200000,
 		.valid_ops_mask = REGULATOR_CHANGE_STATUS |
 				  REGULATOR_CHANGE_VOLTAGE,
 	},
 	.num_consumer_supplies = 1,
 };

 static int arizona_ldo1_of_get_pdata(struct arizona_ldo1_pdata *pdata,
 				     struct regulator_config *config,
 				     const struct regulator_desc *desc,
 				     bool *external_dcvdd)
 {
 	struct arizona_ldo1 *ldo1 = config->driver_data;
 	struct device_node *np = config->dev->of_node;
 	struct device_node *init_node, *dcvdd_node;
 	struct regulator_init_data *init_data;

 	init_node = of_get_child_by_name(np, "ldo1");
 	dcvdd_node = of_parse_phandle(np, "DCVDD-supply", 0);

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

 		init_data = of_get_regulator_init_data(config->dev, init_node,
 						       desc);
 		if (init_data) {
 			init_data->consumer_supplies = &ldo1->supply;
 			init_data->num_consumer_supplies = 1;

 			if (dcvdd_node && dcvdd_node != init_node)
 				*external_dcvdd = true;

 			pdata->init_data = init_data;
 		}
 	} else if (dcvdd_node) {
 		*external_dcvdd = true;
 	}

 	of_node_put(dcvdd_node);

 	return 0;
 }

 static int arizona_ldo1_common_init(struct platform_device *pdev,
 				    struct arizona_ldo1 *ldo1,
 				    const struct regulator_desc *desc,
 				    struct arizona_ldo1_pdata *pdata,
 				    bool *external_dcvdd)
 {
 	struct device *parent_dev = pdev->dev.parent;
 	struct regulator_config config = { };
 	int ret;

 	*external_dcvdd = false;

 	ldo1->supply.supply = "DCVDD";
 	ldo1->init_data.consumer_supplies = &ldo1->supply;
 	ldo1->supply.dev_name = dev_name(parent_dev);

 	config.dev = parent_dev;
 	config.driver_data = ldo1;
 	config.regmap = ldo1->regmap;

 	if (IS_ENABLED(CONFIG_OF)) {
 		if (!dev_get_platdata(parent_dev)) {
 			ret = arizona_ldo1_of_get_pdata(pdata,
 							&config, desc,
 							external_dcvdd);
 			if (ret < 0)
 				return ret;
 		}
 	}

 	/* We assume that high output = regulator off
 	 * Don't use devm, since we need to get against the parent device
 	 * so clean up would happen at the wrong time
 	 */
 	config.ena_gpiod = gpiod_get_optional(parent_dev, "wlf,ldoena",
 				GPIOD_OUT_LOW | GPIOD_FLAGS_BIT_NONEXCLUSIVE);
 	if (IS_ERR(config.ena_gpiod))
 		return PTR_ERR(config.ena_gpiod);

 	ldo1->ena_gpiod = config.ena_gpiod;

 	if (pdata->init_data)
 		config.init_data = pdata->init_data;
 	else
 		config.init_data = &ldo1->init_data;

 	/*
 	 * LDO1 can only be used to supply DCVDD so if it has no
 	 * consumers then DCVDD is supplied externally.
 	 */
 	if (config.init_data->num_consumer_supplies == 0)
 		*external_dcvdd = true;

 	ldo1->regulator = devm_regulator_register(&pdev->dev, desc, &config);

 	of_node_put(config.of_node);

 	if (IS_ERR(ldo1->regulator)) {
 		ret = PTR_ERR(ldo1->regulator);
 		dev_err(&pdev->dev, "Failed to register LDO1 supply: %d\n",
 			ret);
 		return ret;
 	}

 	platform_set_drvdata(pdev, ldo1);

 	return 0;
 }

 static int arizona_ldo1_probe(struct platform_device *pdev)
 {
 	struct arizona *arizona = dev_get_drvdata(pdev->dev.parent);
 	struct arizona_ldo1 *ldo1;
 	const struct regulator_desc *desc;
 	bool external_dcvdd;
 	int ret;

 	ldo1 = devm_kzalloc(&pdev->dev, sizeof(*ldo1), GFP_KERNEL);
 	if (!ldo1)
 		return -ENOMEM;

 	ldo1->regmap = arizona->regmap;

 	/*
 	 * 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 WM5102:
 	case WM8997:
 	case WM8998:
 	case WM1814:
 		desc = &arizona_ldo1_hc;
 		ldo1->init_data = arizona_ldo1_dvfs;
 		break;
 	case WM5110:
 	case WM8280:
 		desc = &arizona_ldo1;
 		ldo1->init_data = arizona_ldo1_wm5110;
 		break;
 	default:
 		desc = &arizona_ldo1;
 		ldo1->init_data = arizona_ldo1_default;
 		break;
 	}

 	ret = arizona_ldo1_common_init(pdev, ldo1, desc,
 				       &arizona->pdata.ldo1,
 				       &external_dcvdd);
 	if (ret == 0)
 		arizona->external_dcvdd = external_dcvdd;

 	return ret;
 }

 static int arizona_ldo1_remove(struct platform_device *pdev)
 {
 	struct arizona_ldo1 *ldo1 = platform_get_drvdata(pdev);

 	if (ldo1->ena_gpiod)
 		gpiod_put(ldo1->ena_gpiod);

 	return 0;
 }

 static struct platform_driver arizona_ldo1_driver = {
 	.probe = arizona_ldo1_probe,
 	.remove = arizona_ldo1_remove,
 	.driver		= {
 		.name	= "arizona-ldo1",
 	},
 };

 module_platform_driver(arizona_ldo1_driver);

 /* Module information */
 MODULE_AUTHOR("Mark Brown <[email protected]>");
 MODULE_DESCRIPTION("Arizona LDO1 driver");
 MODULE_LICENSE("GPL");
 MODULE_ALIAS("platform:arizona-ldo1");
	/*
	* arizona-ldo1.c -- LDO1 supply for Arizona devices
	*
	* Copyright 2012 Wolfson Microelectronics PLC.
	*
	* Author: Mark Brown <[email protected]>
	*
	* 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/gpio/consumer.h>
	#include <linux/platform_device.h>
	#include <linux/regulator/driver.h>
	#include <linux/regulator/machine.h>
	#include <linux/regulator/of_regulator.h>
	#include <linux/slab.h>

	#include <linux/regulator/arizona-ldo1.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 regmap *regmap;

	struct regulator_consumer_supply supply;
	struct regulator_init_data init_data;

	struct gpio_desc *ena_gpiod;
	};

	static int arizona_ldo1_hc_set_voltage_sel(struct regulator_dev *rdev,
	unsigned sel)
	{
	struct regmap *regmap = rdev_get_regmap(rdev);
	unsigned int val;
	int ret;

	if (sel == rdev->desc->n_voltages - 1)
	val = ARIZONA_LDO1_HI_PWR;
	else
	val = 0;

	ret = regmap_update_bits(regmap, ARIZONA_LDO1_CONTROL_2,
	ARIZONA_LDO1_HI_PWR, val);
	if (ret != 0)
	return ret;

	if (val)
	return 0;

	return regulator_set_voltage_sel_regmap(rdev, sel);
	}

	static int arizona_ldo1_hc_get_voltage_sel(struct regulator_dev *rdev)
	{
	struct regmap *regmap = rdev_get_regmap(rdev);
	unsigned int val;
	int ret;

	ret = regmap_read(regmap, ARIZONA_LDO1_CONTROL_2, &val);
	if (ret != 0)
	return ret;

	if (val & ARIZONA_LDO1_HI_PWR)
	return rdev->desc->n_voltages - 1;

	return regulator_get_voltage_sel_regmap(rdev);
	}

	static const struct regulator_ops arizona_ldo1_hc_ops = {
	.list_voltage = regulator_list_voltage_linear_range,
	.map_voltage = regulator_map_voltage_linear_range,
	.get_voltage_sel = arizona_ldo1_hc_get_voltage_sel,
	.set_voltage_sel = arizona_ldo1_hc_set_voltage_sel,
	.get_bypass = regulator_get_bypass_regmap,
	.set_bypass = regulator_set_bypass_regmap,
	};

	static const struct regulator_linear_range arizona_ldo1_hc_ranges[] = {
	REGULATOR_LINEAR_RANGE(900000, 0, 0x6, 50000),
	REGULATOR_LINEAR_RANGE(1800000, 0x7, 0x7, 0),
	};

	static const struct regulator_desc arizona_ldo1_hc = {
	.name = "LDO1",
	.supply_name = "LDOVDD",
	.type = REGULATOR_VOLTAGE,
	.ops = &arizona_ldo1_hc_ops,

	.vsel_reg = ARIZONA_LDO1_CONTROL_1,
	.vsel_mask = ARIZONA_LDO1_VSEL_MASK,
	.bypass_reg = ARIZONA_LDO1_CONTROL_1,
	.bypass_mask = ARIZONA_LDO1_BYPASS,
	.linear_ranges = arizona_ldo1_hc_ranges,
	.n_linear_ranges = ARRAY_SIZE(arizona_ldo1_hc_ranges),
	.n_voltages = 8,
	.enable_time = 1500,
	.ramp_delay = 24000,

	.owner = THIS_MODULE,
	};

	static const 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,
	};

	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,
	.min_uV = 900000,
	.uV_step = 25000,
	.n_voltages = 13,
	.enable_time = 500,
	.ramp_delay = 24000,

	.owner = THIS_MODULE,
	};

	static const struct regulator_init_data arizona_ldo1_dvfs = {
	.constraints = {
	.min_uV = 1200000,
	.max_uV = 1800000,
	.valid_ops_mask = REGULATOR_CHANGE_STATUS \|
	REGULATOR_CHANGE_VOLTAGE,
	},
	.num_consumer_supplies = 1,
	};

	static const struct regulator_init_data arizona_ldo1_default = {
	.constraints = {
	.valid_ops_mask = REGULATOR_CHANGE_STATUS,
	},
	.num_consumer_supplies = 1,
	};

	static const struct regulator_init_data arizona_ldo1_wm5110 = {
	.constraints = {
	.min_uV = 1175000,
	.max_uV = 1200000,
	.valid_ops_mask = REGULATOR_CHANGE_STATUS \|
	REGULATOR_CHANGE_VOLTAGE,
	},
	.num_consumer_supplies = 1,
	};

	static int arizona_ldo1_of_get_pdata(struct arizona_ldo1_pdata *pdata,
	struct regulator_config *config,
	const struct regulator_desc *desc,
	bool *external_dcvdd)
	{
	struct arizona_ldo1 *ldo1 = config->driver_data;
	struct device_node *np = config->dev->of_node;
	struct device_node init_node, dcvdd_node;
	struct regulator_init_data *init_data;

	init_node = of_get_child_by_name(np, "ldo1");
	dcvdd_node = of_parse_phandle(np, "DCVDD-supply", 0);

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

	init_data = of_get_regulator_init_data(config->dev, init_node,
	desc);
	if (init_data) {
	init_data->consumer_supplies = &ldo1->supply;
	init_data->num_consumer_supplies = 1;

	if (dcvdd_node && dcvdd_node != init_node)
	*external_dcvdd = true;

	pdata->init_data = init_data;
	}
	} else if (dcvdd_node) {
	*external_dcvdd = true;
	}

	of_node_put(dcvdd_node);

	return 0;
	}

	static int arizona_ldo1_common_init(struct platform_device *pdev,
	struct arizona_ldo1 *ldo1,
	const struct regulator_desc *desc,
	struct arizona_ldo1_pdata *pdata,
	bool *external_dcvdd)
	{
	struct device *parent_dev = pdev->dev.parent;
	struct regulator_config config = { };
	int ret;

	*external_dcvdd = false;

	ldo1->supply.supply = "DCVDD";
	ldo1->init_data.consumer_supplies = &ldo1->supply;
	ldo1->supply.dev_name = dev_name(parent_dev);

	config.dev = parent_dev;
	config.driver_data = ldo1;
	config.regmap = ldo1->regmap;

	if (IS_ENABLED(CONFIG_OF)) {
	if (!dev_get_platdata(parent_dev)) {
	ret = arizona_ldo1_of_get_pdata(pdata,
	&config, desc,
	external_dcvdd);
	if (ret < 0)
	return ret;
	}
	}

	/* We assume that high output = regulator off
	* Don't use devm, since we need to get against the parent device
	* so clean up would happen at the wrong time
	*/
	config.ena_gpiod = gpiod_get_optional(parent_dev, "wlf,ldoena",
	GPIOD_OUT_LOW \| GPIOD_FLAGS_BIT_NONEXCLUSIVE);
	if (IS_ERR(config.ena_gpiod))
	return PTR_ERR(config.ena_gpiod);

	ldo1->ena_gpiod = config.ena_gpiod;

	if (pdata->init_data)
	config.init_data = pdata->init_data;
	else
	config.init_data = &ldo1->init_data;

	/*
	* LDO1 can only be used to supply DCVDD so if it has no
	* consumers then DCVDD is supplied externally.
	*/
	if (config.init_data->num_consumer_supplies == 0)
	*external_dcvdd = true;

	ldo1->regulator = devm_regulator_register(&pdev->dev, desc, &config);

	of_node_put(config.of_node);

	if (IS_ERR(ldo1->regulator)) {
	ret = PTR_ERR(ldo1->regulator);
	dev_err(&pdev->dev, "Failed to register LDO1 supply: %d\n",
	ret);
	return ret;
	}

	platform_set_drvdata(pdev, ldo1);

	return 0;
	}

	static int arizona_ldo1_probe(struct platform_device *pdev)
	{
	struct arizona *arizona = dev_get_drvdata(pdev->dev.parent);
	struct arizona_ldo1 *ldo1;
	const struct regulator_desc *desc;
	bool external_dcvdd;
	int ret;

	ldo1 = devm_kzalloc(&pdev->dev, sizeof(*ldo1), GFP_KERNEL);
	if (!ldo1)
	return -ENOMEM;

	ldo1->regmap = arizona->regmap;

	/*
	* 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 WM5102:
	case WM8997:
	case WM8998:
	case WM1814:
	desc = &arizona_ldo1_hc;
	ldo1->init_data = arizona_ldo1_dvfs;
	break;
	case WM5110:
	case WM8280:
	desc = &arizona_ldo1;
	ldo1->init_data = arizona_ldo1_wm5110;
	break;
	default:
	desc = &arizona_ldo1;
	ldo1->init_data = arizona_ldo1_default;
	break;
	}

	ret = arizona_ldo1_common_init(pdev, ldo1, desc,
	&arizona->pdata.ldo1,
	&external_dcvdd);
	if (ret == 0)
	arizona->external_dcvdd = external_dcvdd;

	return ret;
	}

	static int arizona_ldo1_remove(struct platform_device *pdev)
	{
	struct arizona_ldo1 *ldo1 = platform_get_drvdata(pdev);

	if (ldo1->ena_gpiod)
	gpiod_put(ldo1->ena_gpiod);

	return 0;
	}

	static struct platform_driver arizona_ldo1_driver = {
	.probe = arizona_ldo1_probe,
	.remove = arizona_ldo1_remove,
	.driver = {
	.name = "arizona-ldo1",
	},
	};

	module_platform_driver(arizona_ldo1_driver);

	/* Module information */
	MODULE_AUTHOR("Mark Brown <[email protected]>");
	MODULE_DESCRIPTION("Arizona LDO1 driver");
	MODULE_LICENSE("GPL");
	MODULE_ALIAS("platform:arizona-ldo1");