drivers/regulator/tps68470-regulator.c - linux - Git at Google

 // SPDX-License-Identifier: GPL-2.0
 //
 // Regulator driver for TPS68470 PMIC
 //
 // Copyright (c) 2021 Red Hat Inc.
 // Copyright (C) 2018 Intel Corporation
 //
 // Authors:
 //	Hans de Goede <hdegoede@redhat.com>
 //	Zaikuo Wang <zaikuo.wang@intel.com>
 //	Tianshu Qiu <tian.shu.qiu@intel.com>
 //	Jian Xu Zheng <jian.xu.zheng@intel.com>
 //	Yuning Pu <yuning.pu@intel.com>
 //	Rajmohan Mani <rajmohan.mani@intel.com>

 #include <linux/clk.h>
 #include <linux/device.h>
 #include <linux/err.h>
 #include <linux/init.h>
 #include <linux/kernel.h>
 #include <linux/mfd/tps68470.h>
 #include <linux/module.h>
 #include <linux/platform_data/tps68470.h>
 #include <linux/platform_device.h>
 #include <linux/regulator/driver.h>
 #include <linux/regulator/machine.h>

 struct tps68470_regulator_data {
 	struct clk *clk;
 };

 #define TPS68470_REGULATOR(_name, _id, _ops, _n,			\
 			   _vr, _vm, _er, _em, _lr, _nlr)		\
 	[TPS68470_ ## _name] = {					\
 		.name			= # _name,			\
 		.id			= _id,				\
 		.ops			= &_ops,			\
 		.n_voltages		= _n,				\
 		.type			= REGULATOR_VOLTAGE,		\
 		.owner			= THIS_MODULE,			\
 		.vsel_reg		= _vr,				\
 		.vsel_mask		= _vm,				\
 		.enable_reg		= _er,				\
 		.enable_mask		= _em,				\
 		.linear_ranges		= _lr,				\
 		.n_linear_ranges	= _nlr,				\
 	}

 static const struct linear_range tps68470_ldo_ranges[] = {
 	REGULATOR_LINEAR_RANGE(875000, 0, 125, 17800),
 };

 static const struct linear_range tps68470_core_ranges[] = {
 	REGULATOR_LINEAR_RANGE(900000, 0, 42, 25000),
 };

 static int tps68470_regulator_enable(struct regulator_dev *rdev)
 {
 	struct tps68470_regulator_data *data = rdev->reg_data;
 	int ret;

 	/* The Core buck regulator needs the PMIC's PLL to be enabled */
 	if (rdev->desc->id == TPS68470_CORE) {
 		ret = clk_prepare_enable(data->clk);
 		if (ret) {
 			dev_err(&rdev->dev, "Error enabling TPS68470 clock\n");
 			return ret;
 		}
 	}

 	return regulator_enable_regmap(rdev);
 }

 static int tps68470_regulator_disable(struct regulator_dev *rdev)
 {
 	struct tps68470_regulator_data *data = rdev->reg_data;

 	if (rdev->desc->id == TPS68470_CORE)
 		clk_disable_unprepare(data->clk);

 	return regulator_disable_regmap(rdev);
 }

 /* Operations permitted on DCDCx, LDO2, LDO3 and LDO4 */
 static const struct regulator_ops tps68470_regulator_ops = {
 	.is_enabled		= regulator_is_enabled_regmap,
 	.enable			= tps68470_regulator_enable,
 	.disable		= tps68470_regulator_disable,
 	.get_voltage_sel	= regulator_get_voltage_sel_regmap,
 	.set_voltage_sel	= regulator_set_voltage_sel_regmap,
 	.list_voltage		= regulator_list_voltage_linear_range,
 	.map_voltage		= regulator_map_voltage_linear_range,
 };

 static const struct regulator_ops tps68470_always_on_reg_ops = {
 	.get_voltage_sel	= regulator_get_voltage_sel_regmap,
 	.set_voltage_sel	= regulator_set_voltage_sel_regmap,
 	.list_voltage		= regulator_list_voltage_linear_range,
 	.map_voltage		= regulator_map_voltage_linear_range,
 };

 static const struct regulator_desc regulators[] = {
 	TPS68470_REGULATOR(CORE, TPS68470_CORE, tps68470_regulator_ops, 43,
 			   TPS68470_REG_VDVAL, TPS68470_VDVAL_DVOLT_MASK,
 			   TPS68470_REG_VDCTL, TPS68470_VDCTL_EN_MASK,
 			   tps68470_core_ranges, ARRAY_SIZE(tps68470_core_ranges)),
 	TPS68470_REGULATOR(ANA, TPS68470_ANA, tps68470_regulator_ops, 126,
 			   TPS68470_REG_VAVAL, TPS68470_VAVAL_AVOLT_MASK,
 			   TPS68470_REG_VACTL, TPS68470_VACTL_EN_MASK,
 			   tps68470_ldo_ranges, ARRAY_SIZE(tps68470_ldo_ranges)),
 	TPS68470_REGULATOR(VCM, TPS68470_VCM, tps68470_regulator_ops, 126,
 			   TPS68470_REG_VCMVAL, TPS68470_VCMVAL_VCVOLT_MASK,
 			   TPS68470_REG_VCMCTL, TPS68470_VCMCTL_EN_MASK,
 			   tps68470_ldo_ranges, ARRAY_SIZE(tps68470_ldo_ranges)),
 	TPS68470_REGULATOR(VIO, TPS68470_VIO, tps68470_always_on_reg_ops, 126,
 			   TPS68470_REG_VIOVAL, TPS68470_VIOVAL_IOVOLT_MASK,
 			   0, 0,
 			   tps68470_ldo_ranges, ARRAY_SIZE(tps68470_ldo_ranges)),
 /*
  * (1) This regulator must have the same voltage as VIO if S_IO LDO is used to
  *     power a sensor/VCM which I2C is daisy chained behind the PMIC.
  * (2) If there is no I2C daisy chain it can be set freely.
  */
 	TPS68470_REGULATOR(VSIO, TPS68470_VSIO, tps68470_regulator_ops, 126,
 			   TPS68470_REG_VSIOVAL, TPS68470_VSIOVAL_IOVOLT_MASK,
 			   TPS68470_REG_S_I2C_CTL, TPS68470_S_I2C_CTL_EN_MASK,
 			   tps68470_ldo_ranges, ARRAY_SIZE(tps68470_ldo_ranges)),
 	TPS68470_REGULATOR(AUX1, TPS68470_AUX1, tps68470_regulator_ops, 126,
 			   TPS68470_REG_VAUX1VAL, TPS68470_VAUX1VAL_AUX1VOLT_MASK,
 			   TPS68470_REG_VAUX1CTL, TPS68470_VAUX1CTL_EN_MASK,
 			   tps68470_ldo_ranges, ARRAY_SIZE(tps68470_ldo_ranges)),
 	TPS68470_REGULATOR(AUX2, TPS68470_AUX2, tps68470_regulator_ops, 126,
 			   TPS68470_REG_VAUX2VAL, TPS68470_VAUX2VAL_AUX2VOLT_MASK,
 			   TPS68470_REG_VAUX2CTL, TPS68470_VAUX2CTL_EN_MASK,
 			   tps68470_ldo_ranges, ARRAY_SIZE(tps68470_ldo_ranges)),
 };

 static int tps68470_regulator_probe(struct platform_device *pdev)
 {
 	struct device *dev = &pdev->dev;
 	struct tps68470_regulator_platform_data *pdata = dev_get_platdata(dev);
 	struct tps68470_regulator_data *data;
 	struct regulator_config config = { };
 	struct regulator_dev *rdev;
 	int i;

 	data = devm_kzalloc(dev, sizeof(*data), GFP_KERNEL);
 	if (!data)
 		return -ENOMEM;

 	data->clk = devm_clk_get(dev, "tps68470-clk");
 	if (IS_ERR(data->clk))
 		return dev_err_probe(dev, PTR_ERR(data->clk), "getting tps68470-clk\n");

 	config.dev = dev->parent;
 	config.regmap = dev_get_drvdata(dev->parent);
 	config.driver_data = data;

 	for (i = 0; i < TPS68470_NUM_REGULATORS; i++) {
 		if (pdata)
 			config.init_data = pdata->reg_init_data[i];
 		else
 			config.init_data = NULL;

 		rdev = devm_regulator_register(dev, &regulators[i], &config);
 		if (IS_ERR(rdev))
 			return dev_err_probe(dev, PTR_ERR(rdev),
 					     "registering %s regulator\n",
 					     regulators[i].name);
 	}

 	return 0;
 }

 static struct platform_driver tps68470_regulator_driver = {
 	.driver = {
 		.name = "tps68470-regulator",
 		.probe_type = PROBE_PREFER_ASYNCHRONOUS,
 	},
 	.probe = tps68470_regulator_probe,
 };

 /*
  * The ACPI tps68470 probe-ordering depends on the clk/gpio/regulator drivers
  * registering before the drivers for the camera-sensors which use them bind.
  * subsys_initcall() ensures this when the drivers are builtin.
  */
 static int __init tps68470_regulator_init(void)
 {
 	return platform_driver_register(&tps68470_regulator_driver);
 }
 subsys_initcall(tps68470_regulator_init);

 static void __exit tps68470_regulator_exit(void)
 {
 	platform_driver_unregister(&tps68470_regulator_driver);
 }
 module_exit(tps68470_regulator_exit);

 MODULE_ALIAS("platform:tps68470-regulator");
 MODULE_DESCRIPTION("TPS68470 voltage regulator driver");
 MODULE_LICENSE("GPL v2");
	// SPDX-License-Identifier: GPL-2.0
	//
	// Regulator driver for TPS68470 PMIC
	//
	// Copyright (c) 2021 Red Hat Inc.
	// Copyright (C) 2018 Intel Corporation
	//
	// Authors:
	// Hans de Goede <hdegoede@redhat.com>
	// Zaikuo Wang <zaikuo.wang@intel.com>
	// Tianshu Qiu <tian.shu.qiu@intel.com>
	// Jian Xu Zheng <jian.xu.zheng@intel.com>
	// Yuning Pu <yuning.pu@intel.com>
	// Rajmohan Mani <rajmohan.mani@intel.com>

	#include <linux/clk.h>
	#include <linux/device.h>
	#include <linux/err.h>
	#include <linux/init.h>
	#include <linux/kernel.h>
	#include <linux/mfd/tps68470.h>
	#include <linux/module.h>
	#include <linux/platform_data/tps68470.h>
	#include <linux/platform_device.h>
	#include <linux/regulator/driver.h>
	#include <linux/regulator/machine.h>

	struct tps68470_regulator_data {
	struct clk *clk;
	};

	#define TPS68470_REGULATOR(_name, _id, _ops, _n, \
	_vr, _vm, _er, _em, _lr, _nlr) \
	[TPS68470_ ## _name] = { \
	.name = # _name, \
	.id = _id, \
	.ops = &_ops, \
	.n_voltages = _n, \
	.type = REGULATOR_VOLTAGE, \
	.owner = THIS_MODULE, \
	.vsel_reg = _vr, \
	.vsel_mask = _vm, \
	.enable_reg = _er, \
	.enable_mask = _em, \
	.linear_ranges = _lr, \
	.n_linear_ranges = _nlr, \
	}

	static const struct linear_range tps68470_ldo_ranges[] = {
	REGULATOR_LINEAR_RANGE(875000, 0, 125, 17800),
	};

	static const struct linear_range tps68470_core_ranges[] = {
	REGULATOR_LINEAR_RANGE(900000, 0, 42, 25000),
	};

	static int tps68470_regulator_enable(struct regulator_dev *rdev)
	{
	struct tps68470_regulator_data *data = rdev->reg_data;
	int ret;

	/* The Core buck regulator needs the PMIC's PLL to be enabled */
	if (rdev->desc->id == TPS68470_CORE) {
	ret = clk_prepare_enable(data->clk);
	if (ret) {
	dev_err(&rdev->dev, "Error enabling TPS68470 clock\n");
	return ret;
	}
	}

	return regulator_enable_regmap(rdev);
	}

	static int tps68470_regulator_disable(struct regulator_dev *rdev)
	{
	struct tps68470_regulator_data *data = rdev->reg_data;

	if (rdev->desc->id == TPS68470_CORE)
	clk_disable_unprepare(data->clk);

	return regulator_disable_regmap(rdev);
	}

	/* Operations permitted on DCDCx, LDO2, LDO3 and LDO4 */
	static const struct regulator_ops tps68470_regulator_ops = {
	.is_enabled = regulator_is_enabled_regmap,
	.enable = tps68470_regulator_enable,
	.disable = tps68470_regulator_disable,
	.get_voltage_sel = regulator_get_voltage_sel_regmap,
	.set_voltage_sel = regulator_set_voltage_sel_regmap,
	.list_voltage = regulator_list_voltage_linear_range,
	.map_voltage = regulator_map_voltage_linear_range,
	};

	static const struct regulator_ops tps68470_always_on_reg_ops = {
	.get_voltage_sel = regulator_get_voltage_sel_regmap,
	.set_voltage_sel = regulator_set_voltage_sel_regmap,
	.list_voltage = regulator_list_voltage_linear_range,
	.map_voltage = regulator_map_voltage_linear_range,
	};

	static const struct regulator_desc regulators[] = {
	TPS68470_REGULATOR(CORE, TPS68470_CORE, tps68470_regulator_ops, 43,
	TPS68470_REG_VDVAL, TPS68470_VDVAL_DVOLT_MASK,
	TPS68470_REG_VDCTL, TPS68470_VDCTL_EN_MASK,
	tps68470_core_ranges, ARRAY_SIZE(tps68470_core_ranges)),
	TPS68470_REGULATOR(ANA, TPS68470_ANA, tps68470_regulator_ops, 126,
	TPS68470_REG_VAVAL, TPS68470_VAVAL_AVOLT_MASK,
	TPS68470_REG_VACTL, TPS68470_VACTL_EN_MASK,
	tps68470_ldo_ranges, ARRAY_SIZE(tps68470_ldo_ranges)),
	TPS68470_REGULATOR(VCM, TPS68470_VCM, tps68470_regulator_ops, 126,
	TPS68470_REG_VCMVAL, TPS68470_VCMVAL_VCVOLT_MASK,
	TPS68470_REG_VCMCTL, TPS68470_VCMCTL_EN_MASK,
	tps68470_ldo_ranges, ARRAY_SIZE(tps68470_ldo_ranges)),
	TPS68470_REGULATOR(VIO, TPS68470_VIO, tps68470_always_on_reg_ops, 126,
	TPS68470_REG_VIOVAL, TPS68470_VIOVAL_IOVOLT_MASK,
	0, 0,
	tps68470_ldo_ranges, ARRAY_SIZE(tps68470_ldo_ranges)),
	/*
	* (1) This regulator must have the same voltage as VIO if S_IO LDO is used to
	* power a sensor/VCM which I2C is daisy chained behind the PMIC.
	* (2) If there is no I2C daisy chain it can be set freely.
	*/
	TPS68470_REGULATOR(VSIO, TPS68470_VSIO, tps68470_regulator_ops, 126,
	TPS68470_REG_VSIOVAL, TPS68470_VSIOVAL_IOVOLT_MASK,
	TPS68470_REG_S_I2C_CTL, TPS68470_S_I2C_CTL_EN_MASK,
	tps68470_ldo_ranges, ARRAY_SIZE(tps68470_ldo_ranges)),
	TPS68470_REGULATOR(AUX1, TPS68470_AUX1, tps68470_regulator_ops, 126,
	TPS68470_REG_VAUX1VAL, TPS68470_VAUX1VAL_AUX1VOLT_MASK,
	TPS68470_REG_VAUX1CTL, TPS68470_VAUX1CTL_EN_MASK,
	tps68470_ldo_ranges, ARRAY_SIZE(tps68470_ldo_ranges)),
	TPS68470_REGULATOR(AUX2, TPS68470_AUX2, tps68470_regulator_ops, 126,
	TPS68470_REG_VAUX2VAL, TPS68470_VAUX2VAL_AUX2VOLT_MASK,
	TPS68470_REG_VAUX2CTL, TPS68470_VAUX2CTL_EN_MASK,
	tps68470_ldo_ranges, ARRAY_SIZE(tps68470_ldo_ranges)),
	};

	static int tps68470_regulator_probe(struct platform_device *pdev)
	{
	struct device *dev = &pdev->dev;
	struct tps68470_regulator_platform_data *pdata = dev_get_platdata(dev);
	struct tps68470_regulator_data *data;
	struct regulator_config config = { };
	struct regulator_dev *rdev;
	int i;

	data = devm_kzalloc(dev, sizeof(*data), GFP_KERNEL);
	if (!data)
	return -ENOMEM;

	data->clk = devm_clk_get(dev, "tps68470-clk");
	if (IS_ERR(data->clk))
	return dev_err_probe(dev, PTR_ERR(data->clk), "getting tps68470-clk\n");

	config.dev = dev->parent;
	config.regmap = dev_get_drvdata(dev->parent);
	config.driver_data = data;

	for (i = 0; i < TPS68470_NUM_REGULATORS; i++) {
	if (pdata)
	config.init_data = pdata->reg_init_data[i];
	else
	config.init_data = NULL;

	rdev = devm_regulator_register(dev, &regulators[i], &config);
	if (IS_ERR(rdev))
	return dev_err_probe(dev, PTR_ERR(rdev),
	"registering %s regulator\n",
	regulators[i].name);
	}

	return 0;
	}

	static struct platform_driver tps68470_regulator_driver = {
	.driver = {
	.name = "tps68470-regulator",
	.probe_type = PROBE_PREFER_ASYNCHRONOUS,
	},
	.probe = tps68470_regulator_probe,
	};

	/*
	* The ACPI tps68470 probe-ordering depends on the clk/gpio/regulator drivers
	* registering before the drivers for the camera-sensors which use them bind.
	* subsys_initcall() ensures this when the drivers are builtin.
	*/
	static int __init tps68470_regulator_init(void)
	{
	return platform_driver_register(&tps68470_regulator_driver);
	}
	subsys_initcall(tps68470_regulator_init);

	static void __exit tps68470_regulator_exit(void)
	{
	platform_driver_unregister(&tps68470_regulator_driver);
	}
	module_exit(tps68470_regulator_exit);

	MODULE_ALIAS("platform:tps68470-regulator");
	MODULE_DESCRIPTION("TPS68470 voltage regulator driver");
	MODULE_LICENSE("GPL v2");