drivers/regulator/mt6315-regulator.c - linux - Git at Google

 // SPDX-License-Identifier: GPL-2.0
 //
 // Copyright (c) 2021 MediaTek Inc.

 #include <linux/module.h>
 #include <linux/of.h>
 #include <linux/regmap.h>
 #include <linux/regulator/driver.h>
 #include <linux/regulator/machine.h>
 #include <linux/regulator/mt6315-regulator.h>
 #include <linux/regulator/of_regulator.h>
 #include <linux/spmi.h>

 #define MT6315_BUCK_MODE_AUTO		0
 #define MT6315_BUCK_MODE_FORCE_PWM	1
 #define MT6315_BUCK_MODE_LP		2

 struct mt6315_regulator_info {
 	struct regulator_desc desc;
 	u32 status_reg;
 	u32 lp_mode_mask;
 	u32 lp_mode_shift;
 };

 struct mt_regulator_init_data {
 	u32 modeset_mask[MT6315_VBUCK_MAX];
 };

 struct mt6315_chip {
 	struct device *dev;
 	struct regmap *regmap;
 };

 #define MT_BUCK(_name, _bid, _vsel)				\
 [_bid] = {							\
 	.desc = {						\
 		.name = _name,					\
 		.of_match = of_match_ptr(_name),		\
 		.regulators_node = "regulators",		\
 		.ops = &mt6315_volt_range_ops,			\
 		.type = REGULATOR_VOLTAGE,			\
 		.id = _bid,					\
 		.owner = THIS_MODULE,				\
 		.n_voltages = 0xc0,				\
 		.linear_ranges = mt_volt_range1,		\
 		.n_linear_ranges = ARRAY_SIZE(mt_volt_range1),	\
 		.vsel_reg = _vsel,				\
 		.vsel_mask = 0xff,				\
 		.enable_reg = MT6315_BUCK_TOP_CON0,		\
 		.enable_mask = BIT(_bid),			\
 		.of_map_mode = mt6315_map_mode,			\
 	},							\
 	.status_reg = _bid##_DBG4,				\
 	.lp_mode_mask = BIT(_bid),				\
 	.lp_mode_shift = _bid,					\
 }

 static const struct linear_range mt_volt_range1[] = {
 	REGULATOR_LINEAR_RANGE(0, 0, 0xbf, 6250),
 };

 static unsigned int mt6315_map_mode(unsigned int mode)
 {
 	switch (mode) {
 	case MT6315_BUCK_MODE_AUTO:
 		return REGULATOR_MODE_NORMAL;
 	case MT6315_BUCK_MODE_FORCE_PWM:
 		return REGULATOR_MODE_FAST;
 	case MT6315_BUCK_MODE_LP:
 		return REGULATOR_MODE_IDLE;
 	default:
 		return REGULATOR_MODE_INVALID;
 	}
 }

 static unsigned int mt6315_regulator_get_mode(struct regulator_dev *rdev)
 {
 	struct mt_regulator_init_data *init = rdev_get_drvdata(rdev);
 	const struct mt6315_regulator_info *info;
 	int ret, regval;
 	u32 modeset_mask;

 	info = container_of(rdev->desc, struct mt6315_regulator_info, desc);
 	modeset_mask = init->modeset_mask[rdev_get_id(rdev)];
 	ret = regmap_read(rdev->regmap, MT6315_BUCK_TOP_4PHASE_ANA_CON42, &regval);
 	if (ret != 0) {
 		dev_err(&rdev->dev, "Failed to get mode: %d\n", ret);
 		return ret;
 	}

 	if ((regval & modeset_mask) == modeset_mask)
 		return REGULATOR_MODE_FAST;

 	ret = regmap_read(rdev->regmap, MT6315_BUCK_TOP_CON1, &regval);
 	if (ret != 0) {
 		dev_err(&rdev->dev, "Failed to get lp mode: %d\n", ret);
 		return ret;
 	}

 	if (regval & info->lp_mode_mask)
 		return REGULATOR_MODE_IDLE;
 	else
 		return REGULATOR_MODE_NORMAL;
 }

 static int mt6315_regulator_set_mode(struct regulator_dev *rdev,
 				     u32 mode)
 {
 	struct mt_regulator_init_data *init = rdev_get_drvdata(rdev);
 	const struct mt6315_regulator_info *info;
 	int ret, val, curr_mode;
 	u32 modeset_mask;

 	info = container_of(rdev->desc, struct mt6315_regulator_info, desc);
 	modeset_mask = init->modeset_mask[rdev_get_id(rdev)];
 	curr_mode = mt6315_regulator_get_mode(rdev);
 	switch (mode) {
 	case REGULATOR_MODE_FAST:
 		ret = regmap_update_bits(rdev->regmap,
 					 MT6315_BUCK_TOP_4PHASE_ANA_CON42,
 					 modeset_mask,
 					 modeset_mask);
 		break;
 	case REGULATOR_MODE_NORMAL:
 		if (curr_mode == REGULATOR_MODE_FAST) {
 			ret = regmap_update_bits(rdev->regmap,
 						 MT6315_BUCK_TOP_4PHASE_ANA_CON42,
 						 modeset_mask,
 						 0);
 		} else if (curr_mode == REGULATOR_MODE_IDLE) {
 			ret = regmap_update_bits(rdev->regmap,
 						 MT6315_BUCK_TOP_CON1,
 						 info->lp_mode_mask,
 						 0);
 			usleep_range(100, 110);
 		} else {
 			ret = -EINVAL;
 		}
 		break;
 	case REGULATOR_MODE_IDLE:
 		val = MT6315_BUCK_MODE_LP >> 1;
 		val <<= info->lp_mode_shift;
 		ret = regmap_update_bits(rdev->regmap,
 					 MT6315_BUCK_TOP_CON1,
 					 info->lp_mode_mask,
 					 val);
 		break;
 	default:
 		ret = -EINVAL;
 		dev_err(&rdev->dev, "Unsupported mode: %d\n", mode);
 		break;
 	}

 	if (ret != 0) {
 		dev_err(&rdev->dev, "Failed to set mode: %d\n", ret);
 		return ret;
 	}

 	return 0;
 }

 static int mt6315_get_status(struct regulator_dev *rdev)
 {
 	const struct mt6315_regulator_info *info;
 	int ret;
 	u32 regval;

 	info = container_of(rdev->desc, struct mt6315_regulator_info, desc);
 	ret = regmap_read(rdev->regmap, info->status_reg, &regval);
 	if (ret < 0) {
 		dev_err(&rdev->dev, "Failed to get enable reg: %d\n", ret);
 		return ret;
 	}

 	return (regval & BIT(0)) ? REGULATOR_STATUS_ON : REGULATOR_STATUS_OFF;
 }

 static const struct regulator_ops mt6315_volt_range_ops = {
 	.list_voltage = regulator_list_voltage_linear_range,
 	.map_voltage = regulator_map_voltage_linear_range,
 	.set_voltage_sel = regulator_set_voltage_sel_regmap,
 	.get_voltage_sel = regulator_get_voltage_sel_regmap,
 	.set_voltage_time_sel = regulator_set_voltage_time_sel,
 	.enable = regulator_enable_regmap,
 	.disable = regulator_disable_regmap,
 	.is_enabled = regulator_is_enabled_regmap,
 	.get_status = mt6315_get_status,
 	.set_mode = mt6315_regulator_set_mode,
 	.get_mode = mt6315_regulator_get_mode,
 };

 static const struct mt6315_regulator_info mt6315_regulators[MT6315_VBUCK_MAX] = {
 	MT_BUCK("vbuck1", MT6315_VBUCK1, MT6315_BUCK_TOP_ELR0),
 	MT_BUCK("vbuck2", MT6315_VBUCK2, MT6315_BUCK_TOP_ELR2),
 	MT_BUCK("vbuck3", MT6315_VBUCK3, MT6315_BUCK_TOP_ELR4),
 	MT_BUCK("vbuck4", MT6315_VBUCK4, MT6315_BUCK_TOP_ELR6),
 };

 static const struct regmap_config mt6315_regmap_config = {
 	.reg_bits	= 16,
 	.val_bits	= 8,
 	.max_register	= 0x16d0,
 	.fast_io	= true,
 };

 static const struct of_device_id mt6315_of_match[] = {
 	{
 		.compatible = "mediatek,mt6315-regulator",
 	}, {
 		/* sentinel */
 	},
 };
 MODULE_DEVICE_TABLE(of, mt6315_of_match);

 static int mt6315_regulator_probe(struct spmi_device *pdev)
 {
 	struct device *dev = &pdev->dev;
 	struct regmap *regmap;
 	struct mt6315_chip *chip;
 	struct mt_regulator_init_data *init_data;
 	struct regulator_config config = {};
 	struct regulator_dev *rdev;
 	int i;

 	regmap = devm_regmap_init_spmi_ext(pdev, &mt6315_regmap_config);
 	if (IS_ERR(regmap))
 		return PTR_ERR(regmap);

 	chip = devm_kzalloc(dev, sizeof(struct mt6315_chip), GFP_KERNEL);
 	if (!chip)
 		return -ENOMEM;

 	init_data = devm_kzalloc(dev, sizeof(struct mt_regulator_init_data), GFP_KERNEL);
 	if (!init_data)
 		return -ENOMEM;

 	switch (pdev->usid) {
 	case MT6315_PP:
 		init_data->modeset_mask[MT6315_VBUCK1] = BIT(MT6315_VBUCK1) | BIT(MT6315_VBUCK2) |
 							 BIT(MT6315_VBUCK4);
 		break;
 	case MT6315_SP:
 	case MT6315_RP:
 		init_data->modeset_mask[MT6315_VBUCK1] = BIT(MT6315_VBUCK1) | BIT(MT6315_VBUCK2);
 		break;
 	default:
 		init_data->modeset_mask[MT6315_VBUCK1] = BIT(MT6315_VBUCK1);
 		break;
 	}
 	for (i = MT6315_VBUCK2; i < MT6315_VBUCK_MAX; i++)
 		init_data->modeset_mask[i] = BIT(i);

 	chip->dev = dev;
 	chip->regmap = regmap;
 	dev_set_drvdata(dev, chip);

 	config.dev = dev;
 	config.regmap = regmap;
 	for (i = MT6315_VBUCK1; i < MT6315_VBUCK_MAX; i++) {
 		config.driver_data = init_data;
 		rdev = devm_regulator_register(dev, &mt6315_regulators[i].desc, &config);
 		if (IS_ERR(rdev)) {
 			dev_err(dev, "Failed to register %s\n",
 				mt6315_regulators[i].desc.name);
 			return PTR_ERR(rdev);
 		}
 	}

 	return 0;
 }

 static void mt6315_regulator_shutdown(struct spmi_device *pdev)
 {
 	struct mt6315_chip *chip = dev_get_drvdata(&pdev->dev);
 	int ret = 0;

 	ret |= regmap_write(chip->regmap, MT6315_TOP_TMA_KEY_H, PROTECTION_KEY_H);
 	ret |= regmap_write(chip->regmap, MT6315_TOP_TMA_KEY, PROTECTION_KEY);
 	ret |= regmap_update_bits(chip->regmap, MT6315_TOP2_ELR7, 1, 1);
 	ret |= regmap_write(chip->regmap, MT6315_TOP_TMA_KEY, 0);
 	ret |= regmap_write(chip->regmap, MT6315_TOP_TMA_KEY_H, 0);
 	if (ret < 0)
 		dev_err(&pdev->dev, "[%#x] Failed to enable power off sequence. %d\n",
 			   pdev->usid, ret);
 }

 static struct spmi_driver mt6315_regulator_driver = {
 	.driver		= {
 		.name	= "mt6315-regulator",
 		.probe_type = PROBE_PREFER_ASYNCHRONOUS,
 		.of_match_table = mt6315_of_match,
 	},
 	.probe = mt6315_regulator_probe,
 	.shutdown = mt6315_regulator_shutdown,
 };

 module_spmi_driver(mt6315_regulator_driver);

 MODULE_AUTHOR("Hsin-Hsiung Wang <hsin-hsiung.wang@mediatek.com>");
 MODULE_DESCRIPTION("Regulator Driver for MediaTek MT6315 PMIC");
 MODULE_LICENSE("GPL");
	// SPDX-License-Identifier: GPL-2.0
	//
	// Copyright (c) 2021 MediaTek Inc.

	#include <linux/module.h>
	#include <linux/of.h>
	#include <linux/regmap.h>
	#include <linux/regulator/driver.h>
	#include <linux/regulator/machine.h>
	#include <linux/regulator/mt6315-regulator.h>
	#include <linux/regulator/of_regulator.h>
	#include <linux/spmi.h>

	#define MT6315_BUCK_MODE_AUTO 0
	#define MT6315_BUCK_MODE_FORCE_PWM 1
	#define MT6315_BUCK_MODE_LP 2

	struct mt6315_regulator_info {
	struct regulator_desc desc;
	u32 status_reg;
	u32 lp_mode_mask;
	u32 lp_mode_shift;
	};

	struct mt_regulator_init_data {
	u32 modeset_mask[MT6315_VBUCK_MAX];
	};

	struct mt6315_chip {
	struct device *dev;
	struct regmap *regmap;
	};

	#define MT_BUCK(_name, _bid, _vsel) \
	[_bid] = { \
	.desc = { \
	.name = _name, \
	.of_match = of_match_ptr(_name), \
	.regulators_node = "regulators", \
	.ops = &mt6315_volt_range_ops, \
	.type = REGULATOR_VOLTAGE, \
	.id = _bid, \
	.owner = THIS_MODULE, \
	.n_voltages = 0xc0, \
	.linear_ranges = mt_volt_range1, \
	.n_linear_ranges = ARRAY_SIZE(mt_volt_range1), \
	.vsel_reg = _vsel, \
	.vsel_mask = 0xff, \
	.enable_reg = MT6315_BUCK_TOP_CON0, \
	.enable_mask = BIT(_bid), \
	.of_map_mode = mt6315_map_mode, \
	}, \
	.status_reg = _bid##_DBG4, \
	.lp_mode_mask = BIT(_bid), \
	.lp_mode_shift = _bid, \
	}

	static const struct linear_range mt_volt_range1[] = {
	REGULATOR_LINEAR_RANGE(0, 0, 0xbf, 6250),
	};

	static unsigned int mt6315_map_mode(unsigned int mode)
	{
	switch (mode) {
	case MT6315_BUCK_MODE_AUTO:
	return REGULATOR_MODE_NORMAL;
	case MT6315_BUCK_MODE_FORCE_PWM:
	return REGULATOR_MODE_FAST;
	case MT6315_BUCK_MODE_LP:
	return REGULATOR_MODE_IDLE;
	default:
	return REGULATOR_MODE_INVALID;
	}
	}

	static unsigned int mt6315_regulator_get_mode(struct regulator_dev *rdev)
	{
	struct mt_regulator_init_data *init = rdev_get_drvdata(rdev);
	const struct mt6315_regulator_info *info;
	int ret, regval;
	u32 modeset_mask;

	info = container_of(rdev->desc, struct mt6315_regulator_info, desc);
	modeset_mask = init->modeset_mask[rdev_get_id(rdev)];
	ret = regmap_read(rdev->regmap, MT6315_BUCK_TOP_4PHASE_ANA_CON42, &regval);
	if (ret != 0) {
	dev_err(&rdev->dev, "Failed to get mode: %d\n", ret);
	return ret;
	}

	if ((regval & modeset_mask) == modeset_mask)
	return REGULATOR_MODE_FAST;

	ret = regmap_read(rdev->regmap, MT6315_BUCK_TOP_CON1, &regval);
	if (ret != 0) {
	dev_err(&rdev->dev, "Failed to get lp mode: %d\n", ret);
	return ret;
	}

	if (regval & info->lp_mode_mask)
	return REGULATOR_MODE_IDLE;
	else
	return REGULATOR_MODE_NORMAL;
	}

	static int mt6315_regulator_set_mode(struct regulator_dev *rdev,
	u32 mode)
	{
	struct mt_regulator_init_data *init = rdev_get_drvdata(rdev);
	const struct mt6315_regulator_info *info;
	int ret, val, curr_mode;
	u32 modeset_mask;

	info = container_of(rdev->desc, struct mt6315_regulator_info, desc);
	modeset_mask = init->modeset_mask[rdev_get_id(rdev)];
	curr_mode = mt6315_regulator_get_mode(rdev);
	switch (mode) {
	case REGULATOR_MODE_FAST:
	ret = regmap_update_bits(rdev->regmap,
	MT6315_BUCK_TOP_4PHASE_ANA_CON42,
	modeset_mask,
	modeset_mask);
	break;
	case REGULATOR_MODE_NORMAL:
	if (curr_mode == REGULATOR_MODE_FAST) {
	ret = regmap_update_bits(rdev->regmap,
	MT6315_BUCK_TOP_4PHASE_ANA_CON42,
	modeset_mask,
	0);
	} else if (curr_mode == REGULATOR_MODE_IDLE) {
	ret = regmap_update_bits(rdev->regmap,
	MT6315_BUCK_TOP_CON1,
	info->lp_mode_mask,
	0);
	usleep_range(100, 110);
	} else {
	ret = -EINVAL;
	}
	break;
	case REGULATOR_MODE_IDLE:
	val = MT6315_BUCK_MODE_LP >> 1;
	val <<= info->lp_mode_shift;
	ret = regmap_update_bits(rdev->regmap,
	MT6315_BUCK_TOP_CON1,
	info->lp_mode_mask,
	val);
	break;
	default:
	ret = -EINVAL;
	dev_err(&rdev->dev, "Unsupported mode: %d\n", mode);
	break;
	}

	if (ret != 0) {
	dev_err(&rdev->dev, "Failed to set mode: %d\n", ret);
	return ret;
	}

	return 0;
	}

	static int mt6315_get_status(struct regulator_dev *rdev)
	{
	const struct mt6315_regulator_info *info;
	int ret;
	u32 regval;

	info = container_of(rdev->desc, struct mt6315_regulator_info, desc);
	ret = regmap_read(rdev->regmap, info->status_reg, &regval);
	if (ret < 0) {
	dev_err(&rdev->dev, "Failed to get enable reg: %d\n", ret);
	return ret;
	}

	return (regval & BIT(0)) ? REGULATOR_STATUS_ON : REGULATOR_STATUS_OFF;
	}

	static const struct regulator_ops mt6315_volt_range_ops = {
	.list_voltage = regulator_list_voltage_linear_range,
	.map_voltage = regulator_map_voltage_linear_range,
	.set_voltage_sel = regulator_set_voltage_sel_regmap,
	.get_voltage_sel = regulator_get_voltage_sel_regmap,
	.set_voltage_time_sel = regulator_set_voltage_time_sel,
	.enable = regulator_enable_regmap,
	.disable = regulator_disable_regmap,
	.is_enabled = regulator_is_enabled_regmap,
	.get_status = mt6315_get_status,
	.set_mode = mt6315_regulator_set_mode,
	.get_mode = mt6315_regulator_get_mode,
	};

	static const struct mt6315_regulator_info mt6315_regulators[MT6315_VBUCK_MAX] = {
	MT_BUCK("vbuck1", MT6315_VBUCK1, MT6315_BUCK_TOP_ELR0),
	MT_BUCK("vbuck2", MT6315_VBUCK2, MT6315_BUCK_TOP_ELR2),
	MT_BUCK("vbuck3", MT6315_VBUCK3, MT6315_BUCK_TOP_ELR4),
	MT_BUCK("vbuck4", MT6315_VBUCK4, MT6315_BUCK_TOP_ELR6),
	};

	static const struct regmap_config mt6315_regmap_config = {
	.reg_bits = 16,
	.val_bits = 8,
	.max_register = 0x16d0,
	.fast_io = true,
	};

	static const struct of_device_id mt6315_of_match[] = {
	{
	.compatible = "mediatek,mt6315-regulator",
	}, {
	/* sentinel */
	},
	};
	MODULE_DEVICE_TABLE(of, mt6315_of_match);

	static int mt6315_regulator_probe(struct spmi_device *pdev)
	{
	struct device *dev = &pdev->dev;
	struct regmap *regmap;
	struct mt6315_chip *chip;
	struct mt_regulator_init_data *init_data;
	struct regulator_config config = {};
	struct regulator_dev *rdev;
	int i;

	regmap = devm_regmap_init_spmi_ext(pdev, &mt6315_regmap_config);
	if (IS_ERR(regmap))
	return PTR_ERR(regmap);

	chip = devm_kzalloc(dev, sizeof(struct mt6315_chip), GFP_KERNEL);
	if (!chip)
	return -ENOMEM;

	init_data = devm_kzalloc(dev, sizeof(struct mt_regulator_init_data), GFP_KERNEL);
	if (!init_data)
	return -ENOMEM;

	switch (pdev->usid) {
	case MT6315_PP:
	init_data->modeset_mask[MT6315_VBUCK1] = BIT(MT6315_VBUCK1) \| BIT(MT6315_VBUCK2) \|
	BIT(MT6315_VBUCK4);
	break;
	case MT6315_SP:
	case MT6315_RP:
	init_data->modeset_mask[MT6315_VBUCK1] = BIT(MT6315_VBUCK1) \| BIT(MT6315_VBUCK2);
	break;
	default:
	init_data->modeset_mask[MT6315_VBUCK1] = BIT(MT6315_VBUCK1);
	break;
	}
	for (i = MT6315_VBUCK2; i < MT6315_VBUCK_MAX; i++)
	init_data->modeset_mask[i] = BIT(i);

	chip->dev = dev;
	chip->regmap = regmap;
	dev_set_drvdata(dev, chip);

	config.dev = dev;
	config.regmap = regmap;
	for (i = MT6315_VBUCK1; i < MT6315_VBUCK_MAX; i++) {
	config.driver_data = init_data;
	rdev = devm_regulator_register(dev, &mt6315_regulators[i].desc, &config);
	if (IS_ERR(rdev)) {
	dev_err(dev, "Failed to register %s\n",
	mt6315_regulators[i].desc.name);
	return PTR_ERR(rdev);
	}
	}

	return 0;
	}

	static void mt6315_regulator_shutdown(struct spmi_device *pdev)
	{
	struct mt6315_chip *chip = dev_get_drvdata(&pdev->dev);
	int ret = 0;

	ret \|= regmap_write(chip->regmap, MT6315_TOP_TMA_KEY_H, PROTECTION_KEY_H);
	ret \|= regmap_write(chip->regmap, MT6315_TOP_TMA_KEY, PROTECTION_KEY);
	ret \|= regmap_update_bits(chip->regmap, MT6315_TOP2_ELR7, 1, 1);
	ret \|= regmap_write(chip->regmap, MT6315_TOP_TMA_KEY, 0);
	ret \|= regmap_write(chip->regmap, MT6315_TOP_TMA_KEY_H, 0);
	if (ret < 0)
	dev_err(&pdev->dev, "[%#x] Failed to enable power off sequence. %d\n",
	pdev->usid, ret);
	}

	static struct spmi_driver mt6315_regulator_driver = {
	.driver = {
	.name = "mt6315-regulator",
	.probe_type = PROBE_PREFER_ASYNCHRONOUS,
	.of_match_table = mt6315_of_match,
	},
	.probe = mt6315_regulator_probe,
	.shutdown = mt6315_regulator_shutdown,
	};

	module_spmi_driver(mt6315_regulator_driver);

	MODULE_AUTHOR("Hsin-Hsiung Wang <hsin-hsiung.wang@mediatek.com>");
	MODULE_DESCRIPTION("Regulator Driver for MediaTek MT6315 PMIC");
	MODULE_LICENSE("GPL");