drivers/regulator/max77693-regulator.c - kernel/msm-5.4 - Gitiles

 /*
  * max77693.c - Regulator driver for the Maxim 77693 and 77843
  *
  * Copyright (C) 2013-2015 Samsung Electronics
  * Jonghwa Lee <jonghwa3.lee@samsung.com>
  * Krzysztof Kozlowski <krzk@kernel.org>
  *
  * 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.
  *
  * This program is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  * GNU General Public License for more details.
  *
  * You should have received a copy of the GNU General Public License
  * along with this program; if not, write to the Free Software
  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  *
  * This driver is based on max77686.c
  */

 #include <linux/err.h>
 #include <linux/slab.h>
 #include <linux/platform_device.h>
 #include <linux/module.h>
 #include <linux/export.h>
 #include <linux/regulator/driver.h>
 #include <linux/regulator/machine.h>
 #include <linux/mfd/max77693.h>
 #include <linux/mfd/max77693-common.h>
 #include <linux/mfd/max77693-private.h>
 #include <linux/mfd/max77843-private.h>
 #include <linux/regulator/of_regulator.h>
 #include <linux/regmap.h>

 /*
  * ID for MAX77843 regulators.
  * There is no need for such for MAX77693.
  */
 enum max77843_regulator_type {
 	MAX77843_SAFEOUT1 = 0,
 	MAX77843_SAFEOUT2,
 	MAX77843_CHARGER,

 	MAX77843_NUM,
 };

 /* Register differences between chargers: MAX77693 and MAX77843 */
 struct chg_reg_data {
 	unsigned int linear_reg;
 	unsigned int linear_mask;
 	unsigned int uA_step;
 	unsigned int min_sel;
 };

 /*
  * MAX77693 CHARGER regulator - Min : 20mA, Max : 2580mA, step : 20mA
  * 0x00, 0x01, 0x2, 0x03	= 60 mA
  * 0x04 ~ 0x7E			= (60 + (X - 3) * 20) mA
  * Actually for MAX77693 the driver manipulates the maximum input current,
  * not the fast charge current (output). This should be fixed.
  *
  * On MAX77843 the calculation formula is the same (except values).
  * Fortunately it properly manipulates the fast charge current.
  */
 static int max77693_chg_get_current_limit(struct regulator_dev *rdev)
 {
 	const struct chg_reg_data *reg_data = rdev_get_drvdata(rdev);
 	unsigned int chg_min_uA = rdev->constraints->min_uA;
 	unsigned int chg_max_uA = rdev->constraints->max_uA;
 	unsigned int reg, sel;
 	unsigned int val;
 	int ret;

 	ret = regmap_read(rdev->regmap, reg_data->linear_reg, &reg);
 	if (ret < 0)
 		return ret;

 	sel = reg & reg_data->linear_mask;

 	/* the first four codes for charger current are all 60mA */
 	if (sel <= reg_data->min_sel)
 		sel = 0;
 	else
 		sel -= reg_data->min_sel;

 	val = chg_min_uA + reg_data->uA_step * sel;
 	if (val > chg_max_uA)
 		return -EINVAL;

 	return val;
 }

 static int max77693_chg_set_current_limit(struct regulator_dev *rdev,
 						int min_uA, int max_uA)
 {
 	const struct chg_reg_data *reg_data = rdev_get_drvdata(rdev);
 	unsigned int chg_min_uA = rdev->constraints->min_uA;
 	int sel = 0;

 	while (chg_min_uA + reg_data->uA_step * sel < min_uA)
 		sel++;

 	if (chg_min_uA + reg_data->uA_step * sel > max_uA)
 		return -EINVAL;

 	/* the first four codes for charger current are all 60mA */
 	sel += reg_data->min_sel;

 	return regmap_write(rdev->regmap, reg_data->linear_reg, sel);
 }
 /* end of CHARGER regulator ops */

 /* Returns regmap suitable for given regulator on chosen device */
 static struct regmap *max77693_get_regmap(enum max77693_types type,
 					  struct max77693_dev *max77693,
 					  int reg_id)
 {
 	if (type == TYPE_MAX77693)
 		return max77693->regmap;

 	/* Else: TYPE_MAX77843 */
 	switch (reg_id) {
 	case MAX77843_SAFEOUT1:
 	case MAX77843_SAFEOUT2:
 		return max77693->regmap;
 	case MAX77843_CHARGER:
 		return max77693->regmap_chg;
 	default:
 		return max77693->regmap;
 	}
 }

 static const unsigned int max77693_safeout_table[] = {
 	4850000,
 	4900000,
 	4950000,
 	3300000,
 };

 static const struct regulator_ops max77693_safeout_ops = {
 	.list_voltage		= regulator_list_voltage_table,
 	.is_enabled		= regulator_is_enabled_regmap,
 	.enable			= regulator_enable_regmap,
 	.disable		= regulator_disable_regmap,
 	.get_voltage_sel	= regulator_get_voltage_sel_regmap,
 	.set_voltage_sel	= regulator_set_voltage_sel_regmap,
 };

 static struct regulator_ops max77693_charger_ops = {
 	.is_enabled		= regulator_is_enabled_regmap,
 	.enable			= regulator_enable_regmap,
 	.disable		= regulator_disable_regmap,
 	.get_current_limit	= max77693_chg_get_current_limit,
 	.set_current_limit	= max77693_chg_set_current_limit,
 };

 #define max77693_regulator_desc_esafeout(_num)	{		\
 	.name		= "ESAFEOUT"#_num,			\
 	.id		= MAX77693_ESAFEOUT##_num,		\
 	.of_match	= of_match_ptr("ESAFEOUT"#_num),	\
 	.regulators_node	= of_match_ptr("regulators"),	\
 	.n_voltages	= 4,					\
 	.ops		= &max77693_safeout_ops,		\
 	.type		= REGULATOR_VOLTAGE,			\
 	.owner		= THIS_MODULE,				\
 	.volt_table	= max77693_safeout_table,		\
 	.vsel_reg	= MAX77693_CHG_REG_SAFEOUT_CTRL,	\
 	.vsel_mask	= SAFEOUT_CTRL_SAFEOUT##_num##_MASK,	\
 	.enable_reg	= MAX77693_CHG_REG_SAFEOUT_CTRL,	\
 	.enable_mask	= SAFEOUT_CTRL_ENSAFEOUT##_num##_MASK ,	\
 }

 static const struct regulator_desc max77693_supported_regulators[] = {
 	max77693_regulator_desc_esafeout(1),
 	max77693_regulator_desc_esafeout(2),
 	{
 		.name = "CHARGER",
 		.id = MAX77693_CHARGER,
 		.of_match = of_match_ptr("CHARGER"),
 		.regulators_node = of_match_ptr("regulators"),
 		.ops = &max77693_charger_ops,
 		.type = REGULATOR_CURRENT,
 		.owner = THIS_MODULE,
 		.enable_reg = MAX77693_CHG_REG_CHG_CNFG_00,
 		.enable_mask = CHG_CNFG_00_CHG_MASK |
 				CHG_CNFG_00_BUCK_MASK,
 		.enable_val = CHG_CNFG_00_CHG_MASK | CHG_CNFG_00_BUCK_MASK,
 	},
 };

 static const struct chg_reg_data max77693_chg_reg_data = {
 	.linear_reg	= MAX77693_CHG_REG_CHG_CNFG_09,
 	.linear_mask	= CHG_CNFG_09_CHGIN_ILIM_MASK,
 	.uA_step	= 20000,
 	.min_sel	= 3,
 };

 #define	max77843_regulator_desc_esafeout(num)	{			\
 	.name		= "SAFEOUT" # num,				\
 	.id		= MAX77843_SAFEOUT ## num,			\
 	.ops		= &max77693_safeout_ops,			\
 	.of_match	= of_match_ptr("SAFEOUT" # num),		\
 	.regulators_node = of_match_ptr("regulators"),			\
 	.type		= REGULATOR_VOLTAGE,				\
 	.owner		= THIS_MODULE,					\
 	.n_voltages	= ARRAY_SIZE(max77693_safeout_table),		\
 	.volt_table	= max77693_safeout_table,			\
 	.enable_reg	= MAX77843_SYS_REG_SAFEOUTCTRL,			\
 	.enable_mask	= MAX77843_REG_SAFEOUTCTRL_ENSAFEOUT ## num,	\
 	.vsel_reg	= MAX77843_SYS_REG_SAFEOUTCTRL,			\
 	.vsel_mask	= MAX77843_REG_SAFEOUTCTRL_SAFEOUT ## num ## _MASK, \
 }

 static const struct regulator_desc max77843_supported_regulators[] = {
 	[MAX77843_SAFEOUT1] = max77843_regulator_desc_esafeout(1),
 	[MAX77843_SAFEOUT2] = max77843_regulator_desc_esafeout(2),
 	[MAX77843_CHARGER] = {
 		.name		= "CHARGER",
 		.id		= MAX77843_CHARGER,
 		.ops		= &max77693_charger_ops,
 		.of_match	= of_match_ptr("CHARGER"),
 		.regulators_node = of_match_ptr("regulators"),
 		.type		= REGULATOR_CURRENT,
 		.owner		= THIS_MODULE,
 		.enable_reg	= MAX77843_CHG_REG_CHG_CNFG_00,
 		.enable_mask	= MAX77843_CHG_MASK,
 		.enable_val	= MAX77843_CHG_MASK,
 	},
 };

 static const struct chg_reg_data max77843_chg_reg_data = {
 	.linear_reg	= MAX77843_CHG_REG_CHG_CNFG_02,
 	.linear_mask	= MAX77843_CHG_FAST_CHG_CURRENT_MASK,
 	.uA_step	= MAX77843_CHG_FAST_CHG_CURRENT_STEP,
 	.min_sel	= 2,
 };

 static int max77693_pmic_probe(struct platform_device *pdev)
 {
 	enum max77693_types type = platform_get_device_id(pdev)->driver_data;
 	struct max77693_dev *iodev = dev_get_drvdata(pdev->dev.parent);
 	const struct regulator_desc *regulators;
 	unsigned int regulators_size;
 	int i;
 	struct regulator_config config = { };

 	config.dev = iodev->dev;

 	switch (type) {
 	case TYPE_MAX77693:
 		regulators = max77693_supported_regulators;
 		regulators_size = ARRAY_SIZE(max77693_supported_regulators);
 		config.driver_data = (void *)&max77693_chg_reg_data;
 		break;
 	case TYPE_MAX77843:
 		regulators = max77843_supported_regulators;
 		regulators_size = ARRAY_SIZE(max77843_supported_regulators);
 		config.driver_data = (void *)&max77843_chg_reg_data;
 		break;
 	default:
 		dev_err(&pdev->dev, "Unsupported device type: %u\n", type);
 		return -ENODEV;
 	}

 	for (i = 0; i < regulators_size; i++) {
 		struct regulator_dev *rdev;

 		config.regmap = max77693_get_regmap(type, iodev,
 						    regulators[i].id);

 		rdev = devm_regulator_register(&pdev->dev,
 						&regulators[i], &config);
 		if (IS_ERR(rdev)) {
 			dev_err(&pdev->dev,
 				"Failed to initialize regulator-%d\n", i);
 			return PTR_ERR(rdev);
 		}
 	}

 	return 0;
 }

 static const struct platform_device_id max77693_pmic_id[] = {
 	{ "max77693-pmic", TYPE_MAX77693 },
 	{ "max77843-regulator", TYPE_MAX77843 },
 	{},
 };

 MODULE_DEVICE_TABLE(platform, max77693_pmic_id);

 static struct platform_driver max77693_pmic_driver = {
 	.driver = {
 		   .name = "max77693-pmic",
 		   },
 	.probe = max77693_pmic_probe,
 	.id_table = max77693_pmic_id,
 };

 static int __init max77693_pmic_init(void)
 {
 	return platform_driver_register(&max77693_pmic_driver);
 }
 subsys_initcall(max77693_pmic_init);

 static void __exit max77693_pmic_cleanup(void)
 {
 	platform_driver_unregister(&max77693_pmic_driver);
 }
 module_exit(max77693_pmic_cleanup);

 MODULE_DESCRIPTION("MAXIM 77693/77843 regulator driver");
 MODULE_AUTHOR("Jonghwa Lee <jonghwa3.lee@samsung.com>");
 MODULE_AUTHOR("Krzysztof Kozlowski <krzk@kernel.org>");
 MODULE_LICENSE("GPL");
	/*
	* max77693.c - Regulator driver for the Maxim 77693 and 77843
	*
	* Copyright (C) 2013-2015 Samsung Electronics
	* Jonghwa Lee <jonghwa3.lee@samsung.com>
	* Krzysztof Kozlowski <krzk@kernel.org>
	*
	* 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.
	*
	* This program is distributed in the hope that it will be useful,
	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	* GNU General Public License for more details.
	*
	* You should have received a copy of the GNU General Public License
	* along with this program; if not, write to the Free Software
	* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
	*
	* This driver is based on max77686.c
	*/

	#include <linux/err.h>
	#include <linux/slab.h>
	#include <linux/platform_device.h>
	#include <linux/module.h>
	#include <linux/export.h>
	#include <linux/regulator/driver.h>
	#include <linux/regulator/machine.h>
	#include <linux/mfd/max77693.h>
	#include <linux/mfd/max77693-common.h>
	#include <linux/mfd/max77693-private.h>
	#include <linux/mfd/max77843-private.h>
	#include <linux/regulator/of_regulator.h>
	#include <linux/regmap.h>

	/*
	* ID for MAX77843 regulators.
	* There is no need for such for MAX77693.
	*/
	enum max77843_regulator_type {
	MAX77843_SAFEOUT1 = 0,
	MAX77843_SAFEOUT2,
	MAX77843_CHARGER,

	MAX77843_NUM,
	};

	/* Register differences between chargers: MAX77693 and MAX77843 */
	struct chg_reg_data {
	unsigned int linear_reg;
	unsigned int linear_mask;
	unsigned int uA_step;
	unsigned int min_sel;
	};

	/*
	* MAX77693 CHARGER regulator - Min : 20mA, Max : 2580mA, step : 20mA
	* 0x00, 0x01, 0x2, 0x03 = 60 mA
	* 0x04 ~ 0x7E = (60 + (X - 3) * 20) mA
	* Actually for MAX77693 the driver manipulates the maximum input current,
	* not the fast charge current (output). This should be fixed.
	*
	* On MAX77843 the calculation formula is the same (except values).
	* Fortunately it properly manipulates the fast charge current.
	*/
	static int max77693_chg_get_current_limit(struct regulator_dev *rdev)
	{
	const struct chg_reg_data *reg_data = rdev_get_drvdata(rdev);
	unsigned int chg_min_uA = rdev->constraints->min_uA;
	unsigned int chg_max_uA = rdev->constraints->max_uA;
	unsigned int reg, sel;
	unsigned int val;
	int ret;

	ret = regmap_read(rdev->regmap, reg_data->linear_reg, &reg);
	if (ret < 0)
	return ret;

	sel = reg & reg_data->linear_mask;

	/* the first four codes for charger current are all 60mA */
	if (sel <= reg_data->min_sel)
	sel = 0;
	else
	sel -= reg_data->min_sel;

	val = chg_min_uA + reg_data->uA_step * sel;
	if (val > chg_max_uA)
	return -EINVAL;

	return val;
	}

	static int max77693_chg_set_current_limit(struct regulator_dev *rdev,
	int min_uA, int max_uA)
	{
	const struct chg_reg_data *reg_data = rdev_get_drvdata(rdev);
	unsigned int chg_min_uA = rdev->constraints->min_uA;
	int sel = 0;

	while (chg_min_uA + reg_data->uA_step * sel < min_uA)
	sel++;

	if (chg_min_uA + reg_data->uA_step * sel > max_uA)
	return -EINVAL;

	/* the first four codes for charger current are all 60mA */
	sel += reg_data->min_sel;

	return regmap_write(rdev->regmap, reg_data->linear_reg, sel);
	}
	/* end of CHARGER regulator ops */

	/* Returns regmap suitable for given regulator on chosen device */
	static struct regmap *max77693_get_regmap(enum max77693_types type,
	struct max77693_dev *max77693,
	int reg_id)
	{
	if (type == TYPE_MAX77693)
	return max77693->regmap;

	/* Else: TYPE_MAX77843 */
	switch (reg_id) {
	case MAX77843_SAFEOUT1:
	case MAX77843_SAFEOUT2:
	return max77693->regmap;
	case MAX77843_CHARGER:
	return max77693->regmap_chg;
	default:
	return max77693->regmap;
	}
	}

	static const unsigned int max77693_safeout_table[] = {
	4850000,
	4900000,
	4950000,
	3300000,
	};

	static const struct regulator_ops max77693_safeout_ops = {
	.list_voltage = regulator_list_voltage_table,
	.is_enabled = regulator_is_enabled_regmap,
	.enable = regulator_enable_regmap,
	.disable = regulator_disable_regmap,
	.get_voltage_sel = regulator_get_voltage_sel_regmap,
	.set_voltage_sel = regulator_set_voltage_sel_regmap,
	};

	static struct regulator_ops max77693_charger_ops = {
	.is_enabled = regulator_is_enabled_regmap,
	.enable = regulator_enable_regmap,
	.disable = regulator_disable_regmap,
	.get_current_limit = max77693_chg_get_current_limit,
	.set_current_limit = max77693_chg_set_current_limit,
	};

	#define max77693_regulator_desc_esafeout(_num) { \
	.name = "ESAFEOUT"#_num, \
	.id = MAX77693_ESAFEOUT##_num, \
	.of_match = of_match_ptr("ESAFEOUT"#_num), \
	.regulators_node = of_match_ptr("regulators"), \
	.n_voltages = 4, \
	.ops = &max77693_safeout_ops, \
	.type = REGULATOR_VOLTAGE, \
	.owner = THIS_MODULE, \
	.volt_table = max77693_safeout_table, \
	.vsel_reg = MAX77693_CHG_REG_SAFEOUT_CTRL, \
	.vsel_mask = SAFEOUT_CTRL_SAFEOUT##_num##_MASK, \
	.enable_reg = MAX77693_CHG_REG_SAFEOUT_CTRL, \
	.enable_mask = SAFEOUT_CTRL_ENSAFEOUT##_num##_MASK , \
	}

	static const struct regulator_desc max77693_supported_regulators[] = {
	max77693_regulator_desc_esafeout(1),
	max77693_regulator_desc_esafeout(2),
	{
	.name = "CHARGER",
	.id = MAX77693_CHARGER,
	.of_match = of_match_ptr("CHARGER"),
	.regulators_node = of_match_ptr("regulators"),
	.ops = &max77693_charger_ops,
	.type = REGULATOR_CURRENT,
	.owner = THIS_MODULE,
	.enable_reg = MAX77693_CHG_REG_CHG_CNFG_00,
	.enable_mask = CHG_CNFG_00_CHG_MASK \|
	CHG_CNFG_00_BUCK_MASK,
	.enable_val = CHG_CNFG_00_CHG_MASK \| CHG_CNFG_00_BUCK_MASK,
	},
	};

	static const struct chg_reg_data max77693_chg_reg_data = {
	.linear_reg = MAX77693_CHG_REG_CHG_CNFG_09,
	.linear_mask = CHG_CNFG_09_CHGIN_ILIM_MASK,
	.uA_step = 20000,
	.min_sel = 3,
	};

	#define max77843_regulator_desc_esafeout(num) { \
	.name = "SAFEOUT" # num, \
	.id = MAX77843_SAFEOUT ## num, \
	.ops = &max77693_safeout_ops, \
	.of_match = of_match_ptr("SAFEOUT" # num), \
	.regulators_node = of_match_ptr("regulators"), \
	.type = REGULATOR_VOLTAGE, \
	.owner = THIS_MODULE, \
	.n_voltages = ARRAY_SIZE(max77693_safeout_table), \
	.volt_table = max77693_safeout_table, \
	.enable_reg = MAX77843_SYS_REG_SAFEOUTCTRL, \
	.enable_mask = MAX77843_REG_SAFEOUTCTRL_ENSAFEOUT ## num, \
	.vsel_reg = MAX77843_SYS_REG_SAFEOUTCTRL, \
	.vsel_mask = MAX77843_REG_SAFEOUTCTRL_SAFEOUT ## num ## _MASK, \
	}

	static const struct regulator_desc max77843_supported_regulators[] = {
	[MAX77843_SAFEOUT1] = max77843_regulator_desc_esafeout(1),
	[MAX77843_SAFEOUT2] = max77843_regulator_desc_esafeout(2),
	[MAX77843_CHARGER] = {
	.name = "CHARGER",
	.id = MAX77843_CHARGER,
	.ops = &max77693_charger_ops,
	.of_match = of_match_ptr("CHARGER"),
	.regulators_node = of_match_ptr("regulators"),
	.type = REGULATOR_CURRENT,
	.owner = THIS_MODULE,
	.enable_reg = MAX77843_CHG_REG_CHG_CNFG_00,
	.enable_mask = MAX77843_CHG_MASK,
	.enable_val = MAX77843_CHG_MASK,
	},
	};

	static const struct chg_reg_data max77843_chg_reg_data = {
	.linear_reg = MAX77843_CHG_REG_CHG_CNFG_02,
	.linear_mask = MAX77843_CHG_FAST_CHG_CURRENT_MASK,
	.uA_step = MAX77843_CHG_FAST_CHG_CURRENT_STEP,
	.min_sel = 2,
	};

	static int max77693_pmic_probe(struct platform_device *pdev)
	{
	enum max77693_types type = platform_get_device_id(pdev)->driver_data;
	struct max77693_dev *iodev = dev_get_drvdata(pdev->dev.parent);
	const struct regulator_desc *regulators;
	unsigned int regulators_size;
	int i;
	struct regulator_config config = { };

	config.dev = iodev->dev;

	switch (type) {
	case TYPE_MAX77693:
	regulators = max77693_supported_regulators;
	regulators_size = ARRAY_SIZE(max77693_supported_regulators);
	config.driver_data = (void *)&max77693_chg_reg_data;
	break;
	case TYPE_MAX77843:
	regulators = max77843_supported_regulators;
	regulators_size = ARRAY_SIZE(max77843_supported_regulators);
	config.driver_data = (void *)&max77843_chg_reg_data;
	break;
	default:
	dev_err(&pdev->dev, "Unsupported device type: %u\n", type);
	return -ENODEV;
	}

	for (i = 0; i < regulators_size; i++) {
	struct regulator_dev *rdev;

	config.regmap = max77693_get_regmap(type, iodev,
	regulators[i].id);

	rdev = devm_regulator_register(&pdev->dev,
	&regulators[i], &config);
	if (IS_ERR(rdev)) {
	dev_err(&pdev->dev,
	"Failed to initialize regulator-%d\n", i);
	return PTR_ERR(rdev);
	}
	}

	return 0;
	}

	static const struct platform_device_id max77693_pmic_id[] = {
	{ "max77693-pmic", TYPE_MAX77693 },
	{ "max77843-regulator", TYPE_MAX77843 },
	{},
	};

	MODULE_DEVICE_TABLE(platform, max77693_pmic_id);

	static struct platform_driver max77693_pmic_driver = {
	.driver = {
	.name = "max77693-pmic",
	},
	.probe = max77693_pmic_probe,
	.id_table = max77693_pmic_id,
	};

	static int __init max77693_pmic_init(void)
	{
	return platform_driver_register(&max77693_pmic_driver);
	}
	subsys_initcall(max77693_pmic_init);

	static void __exit max77693_pmic_cleanup(void)
	{
	platform_driver_unregister(&max77693_pmic_driver);
	}
	module_exit(max77693_pmic_cleanup);

	MODULE_DESCRIPTION("MAXIM 77693/77843 regulator driver");
	MODULE_AUTHOR("Jonghwa Lee <jonghwa3.lee@samsung.com>");
	MODULE_AUTHOR("Krzysztof Kozlowski <krzk@kernel.org>");
	MODULE_LICENSE("GPL");