drivers/regulator/bd71837-regulator.c - third_party/kernel - Git at Google

 // SPDX-License-Identifier: GPL-2.0
 // Copyright (C) 2018 ROHM Semiconductors
 // bd71837-regulator.c ROHM BD71837MWV regulator driver

 #include <linux/delay.h>
 #include <linux/err.h>
 #include <linux/gpio.h>
 #include <linux/interrupt.h>
 #include <linux/kernel.h>
 #include <linux/mfd/rohm-bd718x7.h>
 #include <linux/module.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>

 struct bd71837_pmic {
 	struct regulator_desc descs[BD71837_REGULATOR_CNT];
 	struct bd71837 *mfd;
 	struct platform_device *pdev;
 	struct regulator_dev *rdev[BD71837_REGULATOR_CNT];
 };

 /*
  * BUCK1/2/3/4
  * BUCK1RAMPRATE[1:0] BUCK1 DVS ramp rate setting
  * 00: 10.00mV/usec 10mV 1uS
  * 01: 5.00mV/usec	10mV 2uS
  * 10: 2.50mV/usec	10mV 4uS
  * 11: 1.25mV/usec	10mV 8uS
  */
 static int bd71837_buck1234_set_ramp_delay(struct regulator_dev *rdev,
 					   int ramp_delay)
 {
 	struct bd71837_pmic *pmic = rdev_get_drvdata(rdev);
 	struct bd71837 *mfd = pmic->mfd;
 	int id = rdev->desc->id;
 	unsigned int ramp_value = BUCK_RAMPRATE_10P00MV;

 	dev_dbg(&pmic->pdev->dev, "Buck[%d] Set Ramp = %d\n", id + 1,
 		ramp_delay);
 	switch (ramp_delay) {
 	case 1 ... 1250:
 		ramp_value = BUCK_RAMPRATE_1P25MV;
 		break;
 	case 1251 ... 2500:
 		ramp_value = BUCK_RAMPRATE_2P50MV;
 		break;
 	case 2501 ... 5000:
 		ramp_value = BUCK_RAMPRATE_5P00MV;
 		break;
 	case 5001 ... 10000:
 		ramp_value = BUCK_RAMPRATE_10P00MV;
 		break;
 	default:
 		ramp_value = BUCK_RAMPRATE_10P00MV;
 		dev_err(&pmic->pdev->dev,
 			"%s: ramp_delay: %d not supported, setting 10000mV//us\n",
 			rdev->desc->name, ramp_delay);
 	}

 	return regmap_update_bits(mfd->regmap, BD71837_REG_BUCK1_CTRL + id,
 				  BUCK_RAMPRATE_MASK, ramp_value << 6);
 }

 /* Bucks 1 to 4 support DVS. PWM mode is used when voltage is changed.
  * Bucks 5 to 8 and LDOs can use PFM and must be disabled when voltage
  * is changed. Hence we return -EBUSY for these if voltage is changed
  * when BUCK/LDO is enabled.
  */
 static int bd71837_set_voltage_sel_restricted(struct regulator_dev *rdev,
 						    unsigned int sel)
 {
 	if (regulator_is_enabled_regmap(rdev))
 		return -EBUSY;

 	return regulator_set_voltage_sel_regmap(rdev, sel);
 }

 static struct regulator_ops bd71837_ldo_regulator_ops = {
 	.enable = regulator_enable_regmap,
 	.disable = regulator_disable_regmap,
 	.is_enabled = regulator_is_enabled_regmap,
 	.list_voltage = regulator_list_voltage_linear_range,
 	.set_voltage_sel = bd71837_set_voltage_sel_restricted,
 	.get_voltage_sel = regulator_get_voltage_sel_regmap,
 };

 static struct regulator_ops bd71837_ldo_regulator_nolinear_ops = {
 	.enable = regulator_enable_regmap,
 	.disable = regulator_disable_regmap,
 	.is_enabled = regulator_is_enabled_regmap,
 	.list_voltage = regulator_list_voltage_table,
 	.set_voltage_sel = bd71837_set_voltage_sel_restricted,
 	.get_voltage_sel = regulator_get_voltage_sel_regmap,
 };

 static struct regulator_ops bd71837_buck_regulator_ops = {
 	.enable = regulator_enable_regmap,
 	.disable = regulator_disable_regmap,
 	.is_enabled = regulator_is_enabled_regmap,
 	.list_voltage = regulator_list_voltage_linear_range,
 	.set_voltage_sel = bd71837_set_voltage_sel_restricted,
 	.get_voltage_sel = regulator_get_voltage_sel_regmap,
 	.set_voltage_time_sel = regulator_set_voltage_time_sel,
 };

 static struct regulator_ops bd71837_buck_regulator_nolinear_ops = {
 	.enable = regulator_enable_regmap,
 	.disable = regulator_disable_regmap,
 	.is_enabled = regulator_is_enabled_regmap,
 	.list_voltage = regulator_list_voltage_table,
 	.set_voltage_sel = bd71837_set_voltage_sel_restricted,
 	.get_voltage_sel = regulator_get_voltage_sel_regmap,
 	.set_voltage_time_sel = regulator_set_voltage_time_sel,
 };

 static struct regulator_ops bd71837_buck1234_regulator_ops = {
 	.enable = regulator_enable_regmap,
 	.disable = regulator_disable_regmap,
 	.is_enabled = regulator_is_enabled_regmap,
 	.list_voltage = regulator_list_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,
 	.set_ramp_delay = bd71837_buck1234_set_ramp_delay,
 };

 /*
  * BUCK1/2/3/4
  * 0.70 to 1.30V (10mV step)
  */
 static const struct regulator_linear_range bd71837_buck1234_voltage_ranges[] = {
 	REGULATOR_LINEAR_RANGE(700000, 0x00, 0x3C, 10000),
 	REGULATOR_LINEAR_RANGE(1300000, 0x3D, 0x3F, 0),
 };

 /*
  * BUCK5
  * 0.9V to 1.35V ()
  */
 static const struct regulator_linear_range bd71837_buck5_voltage_ranges[] = {
 	REGULATOR_LINEAR_RANGE(700000, 0x00, 0x03, 100000),
 	REGULATOR_LINEAR_RANGE(1050000, 0x04, 0x05, 50000),
 	REGULATOR_LINEAR_RANGE(1200000, 0x06, 0x07, 150000),
 };

 /*
  * BUCK6
  * 3.0V to 3.3V (step 100mV)
  */
 static const struct regulator_linear_range bd71837_buck6_voltage_ranges[] = {
 	REGULATOR_LINEAR_RANGE(3000000, 0x00, 0x03, 100000),
 };

 /*
  * BUCK7
  * 000 = 1.605V
  * 001 = 1.695V
  * 010 = 1.755V
  * 011 = 1.8V (Initial)
  * 100 = 1.845V
  * 101 = 1.905V
  * 110 = 1.95V
  * 111 = 1.995V
  */
 static const unsigned int buck_7_volts[] = {
 	1605000, 1695000, 1755000, 1800000, 1845000, 1905000, 1950000, 1995000
 };

 /*
  * BUCK8
  * 0.8V to 1.40V (step 10mV)
  */
 static const struct regulator_linear_range bd71837_buck8_voltage_ranges[] = {
 	REGULATOR_LINEAR_RANGE(800000, 0x00, 0x3C, 10000),
 	REGULATOR_LINEAR_RANGE(1400000, 0x3D, 0x3F, 0),
 };

 /*
  * LDO1
  * 3.0 to 3.3V (100mV step)
  */
 static const struct regulator_linear_range bd71837_ldo1_voltage_ranges[] = {
 	REGULATOR_LINEAR_RANGE(3000000, 0x00, 0x03, 100000),
 };

 /*
  * LDO2
  * 0.8 or 0.9V
  */
 static const unsigned int ldo_2_volts[] = {
 	900000, 800000
 };

 /*
  * LDO3
  * 1.8 to 3.3V (100mV step)
  */
 static const struct regulator_linear_range bd71837_ldo3_voltage_ranges[] = {
 	REGULATOR_LINEAR_RANGE(1800000, 0x00, 0x0F, 100000),
 };

 /*
  * LDO4
  * 0.9 to 1.8V (100mV step)
  */
 static const struct regulator_linear_range bd71837_ldo4_voltage_ranges[] = {
 	REGULATOR_LINEAR_RANGE(900000, 0x00, 0x09, 100000),
 	REGULATOR_LINEAR_RANGE(1800000, 0x0A, 0x0F, 0),
 };

 /*
  * LDO5
  * 1.8 to 3.3V (100mV step)
  */
 static const struct regulator_linear_range bd71837_ldo5_voltage_ranges[] = {
 	REGULATOR_LINEAR_RANGE(1800000, 0x00, 0x0F, 100000),
 };

 /*
  * LDO6
  * 0.9 to 1.8V (100mV step)
  */
 static const struct regulator_linear_range bd71837_ldo6_voltage_ranges[] = {
 	REGULATOR_LINEAR_RANGE(900000, 0x00, 0x09, 100000),
 	REGULATOR_LINEAR_RANGE(1800000, 0x0A, 0x0F, 0),
 };

 /*
  * LDO7
  * 1.8 to 3.3V (100mV step)
  */
 static const struct regulator_linear_range bd71837_ldo7_voltage_ranges[] = {
 	REGULATOR_LINEAR_RANGE(1800000, 0x00, 0x0F, 100000),
 };

 static const struct regulator_desc bd71837_regulators[] = {
 	{
 		.name = "buck1",
 		.of_match = of_match_ptr("BUCK1"),
 		.regulators_node = of_match_ptr("regulators"),
 		.id = BD71837_BUCK1,
 		.ops = &bd71837_buck1234_regulator_ops,
 		.type = REGULATOR_VOLTAGE,
 		.n_voltages = BD71837_BUCK1_VOLTAGE_NUM,
 		.linear_ranges = bd71837_buck1234_voltage_ranges,
 		.n_linear_ranges = ARRAY_SIZE(bd71837_buck1234_voltage_ranges),
 		.vsel_reg = BD71837_REG_BUCK1_VOLT_RUN,
 		.vsel_mask = BUCK1_RUN_MASK,
 		.enable_reg = BD71837_REG_BUCK1_CTRL,
 		.enable_mask = BD71837_BUCK_EN,
 		.owner = THIS_MODULE,
 	},
 	{
 		.name = "buck2",
 		.of_match = of_match_ptr("BUCK2"),
 		.regulators_node = of_match_ptr("regulators"),
 		.id = BD71837_BUCK2,
 		.ops = &bd71837_buck1234_regulator_ops,
 		.type = REGULATOR_VOLTAGE,
 		.n_voltages = BD71837_BUCK2_VOLTAGE_NUM,
 		.linear_ranges = bd71837_buck1234_voltage_ranges,
 		.n_linear_ranges = ARRAY_SIZE(bd71837_buck1234_voltage_ranges),
 		.vsel_reg = BD71837_REG_BUCK2_VOLT_RUN,
 		.vsel_mask = BUCK2_RUN_MASK,
 		.enable_reg = BD71837_REG_BUCK2_CTRL,
 		.enable_mask = BD71837_BUCK_EN,
 		.owner = THIS_MODULE,
 	},
 	{
 		.name = "buck3",
 		.of_match = of_match_ptr("BUCK3"),
 		.regulators_node = of_match_ptr("regulators"),
 		.id = BD71837_BUCK3,
 		.ops = &bd71837_buck1234_regulator_ops,
 		.type = REGULATOR_VOLTAGE,
 		.n_voltages = BD71837_BUCK3_VOLTAGE_NUM,
 		.linear_ranges = bd71837_buck1234_voltage_ranges,
 		.n_linear_ranges = ARRAY_SIZE(bd71837_buck1234_voltage_ranges),
 		.vsel_reg = BD71837_REG_BUCK3_VOLT_RUN,
 		.vsel_mask = BUCK3_RUN_MASK,
 		.enable_reg = BD71837_REG_BUCK3_CTRL,
 		.enable_mask = BD71837_BUCK_EN,
 		.owner = THIS_MODULE,
 	},
 	{
 		.name = "buck4",
 		.of_match = of_match_ptr("BUCK4"),
 		.regulators_node = of_match_ptr("regulators"),
 			.id = BD71837_BUCK4,
 		.ops = &bd71837_buck1234_regulator_ops,
 		.type = REGULATOR_VOLTAGE,
 		.n_voltages = BD71837_BUCK4_VOLTAGE_NUM,
 		.linear_ranges = bd71837_buck1234_voltage_ranges,
 		.n_linear_ranges = ARRAY_SIZE(bd71837_buck1234_voltage_ranges),
 		.vsel_reg = BD71837_REG_BUCK4_VOLT_RUN,
 		.vsel_mask = BUCK4_RUN_MASK,
 		.enable_reg = BD71837_REG_BUCK4_CTRL,
 		.enable_mask = BD71837_BUCK_EN,
 		.owner = THIS_MODULE,
 	},
 	{
 		.name = "buck5",
 		.of_match = of_match_ptr("BUCK5"),
 		.regulators_node = of_match_ptr("regulators"),
 		.id = BD71837_BUCK5,
 		.ops = &bd71837_buck_regulator_ops,
 		.type = REGULATOR_VOLTAGE,
 		.n_voltages = BD71837_BUCK5_VOLTAGE_NUM,
 		.linear_ranges = bd71837_buck5_voltage_ranges,
 		.n_linear_ranges = ARRAY_SIZE(bd71837_buck5_voltage_ranges),
 		.vsel_reg = BD71837_REG_BUCK5_VOLT,
 		.vsel_mask = BUCK5_MASK,
 		.enable_reg = BD71837_REG_BUCK5_CTRL,
 		.enable_mask = BD71837_BUCK_EN,
 		.owner = THIS_MODULE,
 	},
 	{
 		.name = "buck6",
 		.of_match = of_match_ptr("BUCK6"),
 		.regulators_node = of_match_ptr("regulators"),
 		.id = BD71837_BUCK6,
 		.ops = &bd71837_buck_regulator_ops,
 		.type = REGULATOR_VOLTAGE,
 		.n_voltages = BD71837_BUCK6_VOLTAGE_NUM,
 		.linear_ranges = bd71837_buck6_voltage_ranges,
 		.n_linear_ranges = ARRAY_SIZE(bd71837_buck6_voltage_ranges),
 		.vsel_reg = BD71837_REG_BUCK6_VOLT,
 		.vsel_mask = BUCK6_MASK,
 		.enable_reg = BD71837_REG_BUCK6_CTRL,
 		.enable_mask = BD71837_BUCK_EN,
 		.owner = THIS_MODULE,
 	},
 	{
 		.name = "buck7",
 		.of_match = of_match_ptr("BUCK7"),
 		.regulators_node = of_match_ptr("regulators"),
 		.id = BD71837_BUCK7,
 		.ops = &bd71837_buck_regulator_nolinear_ops,
 		.type = REGULATOR_VOLTAGE,
 		.volt_table = &buck_7_volts[0],
 		.n_voltages = ARRAY_SIZE(buck_7_volts),
 		.vsel_reg = BD71837_REG_BUCK7_VOLT,
 		.vsel_mask = BUCK7_MASK,
 		.enable_reg = BD71837_REG_BUCK7_CTRL,
 		.enable_mask = BD71837_BUCK_EN,
 		.owner = THIS_MODULE,
 	},
 	{
 		.name = "buck8",
 		.of_match = of_match_ptr("BUCK8"),
 		.regulators_node = of_match_ptr("regulators"),
 		.id = BD71837_BUCK8,
 		.ops = &bd71837_buck_regulator_ops,
 		.type = REGULATOR_VOLTAGE,
 		.n_voltages = BD71837_BUCK8_VOLTAGE_NUM,
 		.linear_ranges = bd71837_buck8_voltage_ranges,
 		.n_linear_ranges = ARRAY_SIZE(bd71837_buck8_voltage_ranges),
 		.vsel_reg = BD71837_REG_BUCK8_VOLT,
 		.vsel_mask = BUCK8_MASK,
 		.enable_reg = BD71837_REG_BUCK8_CTRL,
 		.enable_mask = BD71837_BUCK_EN,
 		.owner = THIS_MODULE,
 	},
 	{
 		.name = "ldo1",
 		.of_match = of_match_ptr("LDO1"),
 		.regulators_node = of_match_ptr("regulators"),
 		.id = BD71837_LDO1,
 		.ops = &bd71837_ldo_regulator_ops,
 		.type = REGULATOR_VOLTAGE,
 		.n_voltages = BD71837_LDO1_VOLTAGE_NUM,
 		.linear_ranges = bd71837_ldo1_voltage_ranges,
 		.n_linear_ranges = ARRAY_SIZE(bd71837_ldo1_voltage_ranges),
 		.vsel_reg = BD71837_REG_LDO1_VOLT,
 		.vsel_mask = LDO1_MASK,
 		.enable_reg = BD71837_REG_LDO1_VOLT,
 		.enable_mask = BD71837_LDO_EN,
 		.owner = THIS_MODULE,
 	},
 	{
 		.name = "ldo2",
 		.of_match = of_match_ptr("LDO2"),
 		.regulators_node = of_match_ptr("regulators"),
 		.id = BD71837_LDO2,
 		.ops = &bd71837_ldo_regulator_nolinear_ops,
 		.type = REGULATOR_VOLTAGE,
 		.volt_table = &ldo_2_volts[0],
 		.vsel_reg = BD71837_REG_LDO2_VOLT,
 		.vsel_mask = LDO2_MASK,
 		.n_voltages = ARRAY_SIZE(ldo_2_volts),
 		.n_voltages = BD71837_LDO2_VOLTAGE_NUM,
 		.enable_reg = BD71837_REG_LDO2_VOLT,
 		.enable_mask = BD71837_LDO_EN,
 		.owner = THIS_MODULE,
 	},
 	{
 		.name = "ldo3",
 		.of_match = of_match_ptr("LDO3"),
 		.regulators_node = of_match_ptr("regulators"),
 		.id = BD71837_LDO3,
 		.ops = &bd71837_ldo_regulator_ops,
 		.type = REGULATOR_VOLTAGE,
 		.n_voltages = BD71837_LDO3_VOLTAGE_NUM,
 		.linear_ranges = bd71837_ldo3_voltage_ranges,
 		.n_linear_ranges = ARRAY_SIZE(bd71837_ldo3_voltage_ranges),
 		.vsel_reg = BD71837_REG_LDO3_VOLT,
 		.vsel_mask = LDO3_MASK,
 		.enable_reg = BD71837_REG_LDO3_VOLT,
 		.enable_mask = BD71837_LDO_EN,
 		.owner = THIS_MODULE,
 	},
 	{
 		.name = "ldo4",
 		.of_match = of_match_ptr("LDO4"),
 		.regulators_node = of_match_ptr("regulators"),
 		.id = BD71837_LDO4,
 		.ops = &bd71837_ldo_regulator_ops,
 		.type = REGULATOR_VOLTAGE,
 		.n_voltages = BD71837_LDO4_VOLTAGE_NUM,
 		.linear_ranges = bd71837_ldo4_voltage_ranges,
 		.n_linear_ranges = ARRAY_SIZE(bd71837_ldo4_voltage_ranges),
 		.vsel_reg = BD71837_REG_LDO4_VOLT,
 		.vsel_mask = LDO4_MASK,
 		.enable_reg = BD71837_REG_LDO4_VOLT,
 		.enable_mask = BD71837_LDO_EN,
 		.owner = THIS_MODULE,
 	},
 	{
 		.name = "ldo5",
 		.of_match = of_match_ptr("LDO5"),
 		.regulators_node = of_match_ptr("regulators"),
 		.id = BD71837_LDO5,
 		.ops = &bd71837_ldo_regulator_ops,
 		.type = REGULATOR_VOLTAGE,
 		.n_voltages = BD71837_LDO5_VOLTAGE_NUM,
 		.linear_ranges = bd71837_ldo5_voltage_ranges,
 		.n_linear_ranges = ARRAY_SIZE(bd71837_ldo5_voltage_ranges),
 		/* LDO5 is supplied by buck6 */
 		.supply_name = "buck6",
 		.vsel_reg = BD71837_REG_LDO5_VOLT,
 		.vsel_mask = LDO5_MASK,
 		.enable_reg = BD71837_REG_LDO5_VOLT,
 		.enable_mask = BD71837_LDO_EN,
 		.owner = THIS_MODULE,
 	},
 	{
 		.name = "ldo6",
 		.of_match = of_match_ptr("LDO6"),
 		.regulators_node = of_match_ptr("regulators"),
 		.id = BD71837_LDO6,
 		.ops = &bd71837_ldo_regulator_ops,
 		.type = REGULATOR_VOLTAGE,
 		.n_voltages = BD71837_LDO6_VOLTAGE_NUM,
 		.linear_ranges = bd71837_ldo6_voltage_ranges,
 		.n_linear_ranges = ARRAY_SIZE(bd71837_ldo6_voltage_ranges),
 		/* LDO6 is supplied by buck7 */
 		.supply_name = "buck7",
 		.vsel_reg = BD71837_REG_LDO6_VOLT,
 		.vsel_mask = LDO6_MASK,
 		.enable_reg = BD71837_REG_LDO6_VOLT,
 		.enable_mask = BD71837_LDO_EN,
 		.owner = THIS_MODULE,
 	},
 	{
 		.name = "ldo7",
 		.of_match = of_match_ptr("LDO7"),
 		.regulators_node = of_match_ptr("regulators"),
 		.id = BD71837_LDO7,
 		.ops = &bd71837_ldo_regulator_ops,
 		.type = REGULATOR_VOLTAGE,
 		.n_voltages = BD71837_LDO7_VOLTAGE_NUM,
 		.linear_ranges = bd71837_ldo7_voltage_ranges,
 		.n_linear_ranges = ARRAY_SIZE(bd71837_ldo7_voltage_ranges),
 		.vsel_reg = BD71837_REG_LDO7_VOLT,
 		.vsel_mask = LDO7_MASK,
 		.enable_reg = BD71837_REG_LDO7_VOLT,
 		.enable_mask = BD71837_LDO_EN,
 		.owner = THIS_MODULE,
 	},
 };

 struct reg_init {
 	unsigned int reg;
 	unsigned int mask;
 };

 static int bd71837_probe(struct platform_device *pdev)
 {
 	struct bd71837_pmic *pmic;
 	struct regulator_config config = { 0 };
 	struct reg_init pmic_regulator_inits[] = {
 		{
 			.reg = BD71837_REG_BUCK1_CTRL,
 			.mask = BD71837_BUCK_SEL,
 		}, {
 			.reg = BD71837_REG_BUCK2_CTRL,
 			.mask = BD71837_BUCK_SEL,
 		}, {
 			.reg = BD71837_REG_BUCK3_CTRL,
 			.mask = BD71837_BUCK_SEL,
 		}, {
 			.reg = BD71837_REG_BUCK4_CTRL,
 			.mask = BD71837_BUCK_SEL,
 		}, {
 			.reg = BD71837_REG_BUCK5_CTRL,
 			.mask = BD71837_BUCK_SEL,
 		}, {
 			.reg = BD71837_REG_BUCK6_CTRL,
 			.mask = BD71837_BUCK_SEL,
 		}, {
 			.reg = BD71837_REG_BUCK7_CTRL,
 			.mask = BD71837_BUCK_SEL,
 		}, {
 			.reg = BD71837_REG_BUCK8_CTRL,
 			.mask = BD71837_BUCK_SEL,
 		}, {
 			.reg = BD71837_REG_LDO1_VOLT,
 			.mask = BD71837_LDO_SEL,
 		}, {
 			.reg = BD71837_REG_LDO2_VOLT,
 			.mask = BD71837_LDO_SEL,
 		}, {
 			.reg = BD71837_REG_LDO3_VOLT,
 			.mask = BD71837_LDO_SEL,
 		}, {
 			.reg = BD71837_REG_LDO4_VOLT,
 			.mask = BD71837_LDO_SEL,
 		}, {
 			.reg = BD71837_REG_LDO5_VOLT,
 			.mask = BD71837_LDO_SEL,
 		}, {
 			.reg = BD71837_REG_LDO6_VOLT,
 			.mask = BD71837_LDO_SEL,
 		}, {
 			.reg = BD71837_REG_LDO7_VOLT,
 			.mask = BD71837_LDO_SEL,
 		}
 	};

 	int i, err;

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

 	memcpy(pmic->descs, bd71837_regulators, sizeof(pmic->descs));

 	pmic->pdev = pdev;
 	pmic->mfd = dev_get_drvdata(pdev->dev.parent);

 	if (!pmic->mfd) {
 		dev_err(&pdev->dev, "No MFD driver data\n");
 		err = -EINVAL;
 		goto err;
 	}
 	platform_set_drvdata(pdev, pmic);

 	/* Register LOCK release */
 	err = regmap_update_bits(pmic->mfd->regmap, BD71837_REG_REGLOCK,
 				 (REGLOCK_PWRSEQ | REGLOCK_VREG), 0);
 	if (err) {
 		dev_err(&pmic->pdev->dev, "Failed to unlock PMIC (%d)\n", err);
 		goto err;
 	} else {
 		dev_dbg(&pmic->pdev->dev, "Unlocked lock register 0x%x\n",
 			BD71837_REG_REGLOCK);
 	}

 	/*
 	 * There is a HW quirk in BD71837. The shutdown sequence timings for
 	 * bucks/LDOs which are controlled via register interface are changed.
 	 * At PMIC poweroff the voltage for BUCK6/7 is cut immediately at the
 	 * beginning of shut-down sequence. As bucks 6 and 7 are parent
 	 * supplies for LDO5 and LDO6 - this causes LDO5/6 voltage
 	 * monitoring to errorneously detect under voltage and force PMIC to
 	 * emergency state instead of poweroff. In order to avoid this we
 	 * disable voltage monitoring for LDO5 and LDO6
 	 */
 	err = regmap_update_bits(pmic->mfd->regmap, BD718XX_REG_MVRFLTMASK2,
 				 BD718XX_LDO5_VRMON80 | BD718XX_LDO6_VRMON80,
 				 BD718XX_LDO5_VRMON80 | BD718XX_LDO6_VRMON80);
 	if (err) {
 		dev_err(&pmic->pdev->dev,
 			"Failed to disable voltage monitoring\n");
 		goto err;
 	}

 	for (i = 0; i < ARRAY_SIZE(pmic_regulator_inits); i++) {

 		struct regulator_desc *desc;
 		struct regulator_dev *rdev;

 		desc = &pmic->descs[i];

 		config.dev = pdev->dev.parent;
 		config.driver_data = pmic;
 		config.regmap = pmic->mfd->regmap;

 		rdev = devm_regulator_register(&pdev->dev, desc, &config);
 		if (IS_ERR(rdev)) {
 			dev_err(pmic->mfd->dev,
 				"failed to register %s regulator\n",
 				desc->name);
 			err = PTR_ERR(rdev);
 			goto err;
 		}
 		/* Regulator register gets the regulator constraints and
 		 * applies them (set_machine_constraints). This should have
 		 * turned the control register(s) to correct values and we
 		 * can now switch the control from PMIC state machine to the
 		 * register interface
 		 */
 		err = regmap_update_bits(pmic->mfd->regmap,
 					 pmic_regulator_inits[i].reg,
 					 pmic_regulator_inits[i].mask,
 					 0xFFFFFFFF);
 		if (err) {
 			dev_err(&pmic->pdev->dev,
 				"Failed to write BUCK/LDO SEL bit for (%s)\n",
 				desc->name);
 			goto err;
 		}

 		pmic->rdev[i] = rdev;
 	}

 err:
 	return err;
 }

 static struct platform_driver bd71837_regulator = {
 	.driver = {
 		.name = "bd71837-pmic",
 	},
 	.probe = bd71837_probe,
 };

 module_platform_driver(bd71837_regulator);

 MODULE_AUTHOR("Matti Vaittinen <matti.vaittinen@fi.rohmeurope.com>");
 MODULE_DESCRIPTION("BD71837 voltage regulator driver");
 MODULE_LICENSE("GPL");
	// SPDX-License-Identifier: GPL-2.0
	// Copyright (C) 2018 ROHM Semiconductors
	// bd71837-regulator.c ROHM BD71837MWV regulator driver

	#include <linux/delay.h>
	#include <linux/err.h>
	#include <linux/gpio.h>
	#include <linux/interrupt.h>
	#include <linux/kernel.h>
	#include <linux/mfd/rohm-bd718x7.h>
	#include <linux/module.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>

	struct bd71837_pmic {
	struct regulator_desc descs[BD71837_REGULATOR_CNT];
	struct bd71837 *mfd;
	struct platform_device *pdev;
	struct regulator_dev *rdev[BD71837_REGULATOR_CNT];
	};

	/*
	* BUCK1/2/3/4
	* BUCK1RAMPRATE[1:0] BUCK1 DVS ramp rate setting
	* 00: 10.00mV/usec 10mV 1uS
	* 01: 5.00mV/usec 10mV 2uS
	* 10: 2.50mV/usec 10mV 4uS
	* 11: 1.25mV/usec 10mV 8uS
	*/
	static int bd71837_buck1234_set_ramp_delay(struct regulator_dev *rdev,
	int ramp_delay)
	{
	struct bd71837_pmic *pmic = rdev_get_drvdata(rdev);
	struct bd71837 *mfd = pmic->mfd;
	int id = rdev->desc->id;
	unsigned int ramp_value = BUCK_RAMPRATE_10P00MV;

	dev_dbg(&pmic->pdev->dev, "Buck[%d] Set Ramp = %d\n", id + 1,
	ramp_delay);
	switch (ramp_delay) {
	case 1 ... 1250:
	ramp_value = BUCK_RAMPRATE_1P25MV;
	break;
	case 1251 ... 2500:
	ramp_value = BUCK_RAMPRATE_2P50MV;
	break;
	case 2501 ... 5000:
	ramp_value = BUCK_RAMPRATE_5P00MV;
	break;
	case 5001 ... 10000:
	ramp_value = BUCK_RAMPRATE_10P00MV;
	break;
	default:
	ramp_value = BUCK_RAMPRATE_10P00MV;
	dev_err(&pmic->pdev->dev,
	"%s: ramp_delay: %d not supported, setting 10000mV//us\n",
	rdev->desc->name, ramp_delay);
	}

	return regmap_update_bits(mfd->regmap, BD71837_REG_BUCK1_CTRL + id,
	BUCK_RAMPRATE_MASK, ramp_value << 6);
	}

	/* Bucks 1 to 4 support DVS. PWM mode is used when voltage is changed.
	* Bucks 5 to 8 and LDOs can use PFM and must be disabled when voltage
	* is changed. Hence we return -EBUSY for these if voltage is changed
	* when BUCK/LDO is enabled.
	*/
	static int bd71837_set_voltage_sel_restricted(struct regulator_dev *rdev,
	unsigned int sel)
	{
	if (regulator_is_enabled_regmap(rdev))
	return -EBUSY;

	return regulator_set_voltage_sel_regmap(rdev, sel);
	}

	static struct regulator_ops bd71837_ldo_regulator_ops = {
	.enable = regulator_enable_regmap,
	.disable = regulator_disable_regmap,
	.is_enabled = regulator_is_enabled_regmap,
	.list_voltage = regulator_list_voltage_linear_range,
	.set_voltage_sel = bd71837_set_voltage_sel_restricted,
	.get_voltage_sel = regulator_get_voltage_sel_regmap,
	};

	static struct regulator_ops bd71837_ldo_regulator_nolinear_ops = {
	.enable = regulator_enable_regmap,
	.disable = regulator_disable_regmap,
	.is_enabled = regulator_is_enabled_regmap,
	.list_voltage = regulator_list_voltage_table,
	.set_voltage_sel = bd71837_set_voltage_sel_restricted,
	.get_voltage_sel = regulator_get_voltage_sel_regmap,
	};

	static struct regulator_ops bd71837_buck_regulator_ops = {
	.enable = regulator_enable_regmap,
	.disable = regulator_disable_regmap,
	.is_enabled = regulator_is_enabled_regmap,
	.list_voltage = regulator_list_voltage_linear_range,
	.set_voltage_sel = bd71837_set_voltage_sel_restricted,
	.get_voltage_sel = regulator_get_voltage_sel_regmap,
	.set_voltage_time_sel = regulator_set_voltage_time_sel,
	};

	static struct regulator_ops bd71837_buck_regulator_nolinear_ops = {
	.enable = regulator_enable_regmap,
	.disable = regulator_disable_regmap,
	.is_enabled = regulator_is_enabled_regmap,
	.list_voltage = regulator_list_voltage_table,
	.set_voltage_sel = bd71837_set_voltage_sel_restricted,
	.get_voltage_sel = regulator_get_voltage_sel_regmap,
	.set_voltage_time_sel = regulator_set_voltage_time_sel,
	};

	static struct regulator_ops bd71837_buck1234_regulator_ops = {
	.enable = regulator_enable_regmap,
	.disable = regulator_disable_regmap,
	.is_enabled = regulator_is_enabled_regmap,
	.list_voltage = regulator_list_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,
	.set_ramp_delay = bd71837_buck1234_set_ramp_delay,
	};

	/*
	* BUCK1/2/3/4
	* 0.70 to 1.30V (10mV step)
	*/
	static const struct regulator_linear_range bd71837_buck1234_voltage_ranges[] = {
	REGULATOR_LINEAR_RANGE(700000, 0x00, 0x3C, 10000),
	REGULATOR_LINEAR_RANGE(1300000, 0x3D, 0x3F, 0),
	};

	/*
	* BUCK5
	* 0.9V to 1.35V ()
	*/
	static const struct regulator_linear_range bd71837_buck5_voltage_ranges[] = {
	REGULATOR_LINEAR_RANGE(700000, 0x00, 0x03, 100000),
	REGULATOR_LINEAR_RANGE(1050000, 0x04, 0x05, 50000),
	REGULATOR_LINEAR_RANGE(1200000, 0x06, 0x07, 150000),
	};

	/*
	* BUCK6
	* 3.0V to 3.3V (step 100mV)
	*/
	static const struct regulator_linear_range bd71837_buck6_voltage_ranges[] = {
	REGULATOR_LINEAR_RANGE(3000000, 0x00, 0x03, 100000),
	};

	/*
	* BUCK7
	* 000 = 1.605V
	* 001 = 1.695V
	* 010 = 1.755V
	* 011 = 1.8V (Initial)
	* 100 = 1.845V
	* 101 = 1.905V
	* 110 = 1.95V
	* 111 = 1.995V
	*/
	static const unsigned int buck_7_volts[] = {
	1605000, 1695000, 1755000, 1800000, 1845000, 1905000, 1950000, 1995000
	};

	/*
	* BUCK8
	* 0.8V to 1.40V (step 10mV)
	*/
	static const struct regulator_linear_range bd71837_buck8_voltage_ranges[] = {
	REGULATOR_LINEAR_RANGE(800000, 0x00, 0x3C, 10000),
	REGULATOR_LINEAR_RANGE(1400000, 0x3D, 0x3F, 0),
	};

	/*
	* LDO1
	* 3.0 to 3.3V (100mV step)
	*/
	static const struct regulator_linear_range bd71837_ldo1_voltage_ranges[] = {
	REGULATOR_LINEAR_RANGE(3000000, 0x00, 0x03, 100000),
	};

	/*
	* LDO2
	* 0.8 or 0.9V
	*/
	static const unsigned int ldo_2_volts[] = {
	900000, 800000
	};

	/*
	* LDO3
	* 1.8 to 3.3V (100mV step)
	*/
	static const struct regulator_linear_range bd71837_ldo3_voltage_ranges[] = {
	REGULATOR_LINEAR_RANGE(1800000, 0x00, 0x0F, 100000),
	};

	/*
	* LDO4
	* 0.9 to 1.8V (100mV step)
	*/
	static const struct regulator_linear_range bd71837_ldo4_voltage_ranges[] = {
	REGULATOR_LINEAR_RANGE(900000, 0x00, 0x09, 100000),
	REGULATOR_LINEAR_RANGE(1800000, 0x0A, 0x0F, 0),
	};

	/*
	* LDO5
	* 1.8 to 3.3V (100mV step)
	*/
	static const struct regulator_linear_range bd71837_ldo5_voltage_ranges[] = {
	REGULATOR_LINEAR_RANGE(1800000, 0x00, 0x0F, 100000),
	};

	/*
	* LDO6
	* 0.9 to 1.8V (100mV step)
	*/
	static const struct regulator_linear_range bd71837_ldo6_voltage_ranges[] = {
	REGULATOR_LINEAR_RANGE(900000, 0x00, 0x09, 100000),
	REGULATOR_LINEAR_RANGE(1800000, 0x0A, 0x0F, 0),
	};

	/*
	* LDO7
	* 1.8 to 3.3V (100mV step)
	*/
	static const struct regulator_linear_range bd71837_ldo7_voltage_ranges[] = {
	REGULATOR_LINEAR_RANGE(1800000, 0x00, 0x0F, 100000),
	};

	static const struct regulator_desc bd71837_regulators[] = {
	{
	.name = "buck1",
	.of_match = of_match_ptr("BUCK1"),
	.regulators_node = of_match_ptr("regulators"),
	.id = BD71837_BUCK1,
	.ops = &bd71837_buck1234_regulator_ops,
	.type = REGULATOR_VOLTAGE,
	.n_voltages = BD71837_BUCK1_VOLTAGE_NUM,
	.linear_ranges = bd71837_buck1234_voltage_ranges,
	.n_linear_ranges = ARRAY_SIZE(bd71837_buck1234_voltage_ranges),
	.vsel_reg = BD71837_REG_BUCK1_VOLT_RUN,
	.vsel_mask = BUCK1_RUN_MASK,
	.enable_reg = BD71837_REG_BUCK1_CTRL,
	.enable_mask = BD71837_BUCK_EN,
	.owner = THIS_MODULE,
	},
	{
	.name = "buck2",
	.of_match = of_match_ptr("BUCK2"),
	.regulators_node = of_match_ptr("regulators"),
	.id = BD71837_BUCK2,
	.ops = &bd71837_buck1234_regulator_ops,
	.type = REGULATOR_VOLTAGE,
	.n_voltages = BD71837_BUCK2_VOLTAGE_NUM,
	.linear_ranges = bd71837_buck1234_voltage_ranges,
	.n_linear_ranges = ARRAY_SIZE(bd71837_buck1234_voltage_ranges),
	.vsel_reg = BD71837_REG_BUCK2_VOLT_RUN,
	.vsel_mask = BUCK2_RUN_MASK,
	.enable_reg = BD71837_REG_BUCK2_CTRL,
	.enable_mask = BD71837_BUCK_EN,
	.owner = THIS_MODULE,
	},
	{
	.name = "buck3",
	.of_match = of_match_ptr("BUCK3"),
	.regulators_node = of_match_ptr("regulators"),
	.id = BD71837_BUCK3,
	.ops = &bd71837_buck1234_regulator_ops,
	.type = REGULATOR_VOLTAGE,
	.n_voltages = BD71837_BUCK3_VOLTAGE_NUM,
	.linear_ranges = bd71837_buck1234_voltage_ranges,
	.n_linear_ranges = ARRAY_SIZE(bd71837_buck1234_voltage_ranges),
	.vsel_reg = BD71837_REG_BUCK3_VOLT_RUN,
	.vsel_mask = BUCK3_RUN_MASK,
	.enable_reg = BD71837_REG_BUCK3_CTRL,
	.enable_mask = BD71837_BUCK_EN,
	.owner = THIS_MODULE,
	},
	{
	.name = "buck4",
	.of_match = of_match_ptr("BUCK4"),
	.regulators_node = of_match_ptr("regulators"),
	.id = BD71837_BUCK4,
	.ops = &bd71837_buck1234_regulator_ops,
	.type = REGULATOR_VOLTAGE,
	.n_voltages = BD71837_BUCK4_VOLTAGE_NUM,
	.linear_ranges = bd71837_buck1234_voltage_ranges,
	.n_linear_ranges = ARRAY_SIZE(bd71837_buck1234_voltage_ranges),
	.vsel_reg = BD71837_REG_BUCK4_VOLT_RUN,
	.vsel_mask = BUCK4_RUN_MASK,
	.enable_reg = BD71837_REG_BUCK4_CTRL,
	.enable_mask = BD71837_BUCK_EN,
	.owner = THIS_MODULE,
	},
	{
	.name = "buck5",
	.of_match = of_match_ptr("BUCK5"),
	.regulators_node = of_match_ptr("regulators"),
	.id = BD71837_BUCK5,
	.ops = &bd71837_buck_regulator_ops,
	.type = REGULATOR_VOLTAGE,
	.n_voltages = BD71837_BUCK5_VOLTAGE_NUM,
	.linear_ranges = bd71837_buck5_voltage_ranges,
	.n_linear_ranges = ARRAY_SIZE(bd71837_buck5_voltage_ranges),
	.vsel_reg = BD71837_REG_BUCK5_VOLT,
	.vsel_mask = BUCK5_MASK,
	.enable_reg = BD71837_REG_BUCK5_CTRL,
	.enable_mask = BD71837_BUCK_EN,
	.owner = THIS_MODULE,
	},
	{
	.name = "buck6",
	.of_match = of_match_ptr("BUCK6"),
	.regulators_node = of_match_ptr("regulators"),
	.id = BD71837_BUCK6,
	.ops = &bd71837_buck_regulator_ops,
	.type = REGULATOR_VOLTAGE,
	.n_voltages = BD71837_BUCK6_VOLTAGE_NUM,
	.linear_ranges = bd71837_buck6_voltage_ranges,
	.n_linear_ranges = ARRAY_SIZE(bd71837_buck6_voltage_ranges),
	.vsel_reg = BD71837_REG_BUCK6_VOLT,
	.vsel_mask = BUCK6_MASK,
	.enable_reg = BD71837_REG_BUCK6_CTRL,
	.enable_mask = BD71837_BUCK_EN,
	.owner = THIS_MODULE,
	},
	{
	.name = "buck7",
	.of_match = of_match_ptr("BUCK7"),
	.regulators_node = of_match_ptr("regulators"),
	.id = BD71837_BUCK7,
	.ops = &bd71837_buck_regulator_nolinear_ops,
	.type = REGULATOR_VOLTAGE,
	.volt_table = &buck_7_volts[0],
	.n_voltages = ARRAY_SIZE(buck_7_volts),
	.vsel_reg = BD71837_REG_BUCK7_VOLT,
	.vsel_mask = BUCK7_MASK,
	.enable_reg = BD71837_REG_BUCK7_CTRL,
	.enable_mask = BD71837_BUCK_EN,
	.owner = THIS_MODULE,
	},
	{
	.name = "buck8",
	.of_match = of_match_ptr("BUCK8"),
	.regulators_node = of_match_ptr("regulators"),
	.id = BD71837_BUCK8,
	.ops = &bd71837_buck_regulator_ops,
	.type = REGULATOR_VOLTAGE,
	.n_voltages = BD71837_BUCK8_VOLTAGE_NUM,
	.linear_ranges = bd71837_buck8_voltage_ranges,
	.n_linear_ranges = ARRAY_SIZE(bd71837_buck8_voltage_ranges),
	.vsel_reg = BD71837_REG_BUCK8_VOLT,
	.vsel_mask = BUCK8_MASK,
	.enable_reg = BD71837_REG_BUCK8_CTRL,
	.enable_mask = BD71837_BUCK_EN,
	.owner = THIS_MODULE,
	},
	{
	.name = "ldo1",
	.of_match = of_match_ptr("LDO1"),
	.regulators_node = of_match_ptr("regulators"),
	.id = BD71837_LDO1,
	.ops = &bd71837_ldo_regulator_ops,
	.type = REGULATOR_VOLTAGE,
	.n_voltages = BD71837_LDO1_VOLTAGE_NUM,
	.linear_ranges = bd71837_ldo1_voltage_ranges,
	.n_linear_ranges = ARRAY_SIZE(bd71837_ldo1_voltage_ranges),
	.vsel_reg = BD71837_REG_LDO1_VOLT,
	.vsel_mask = LDO1_MASK,
	.enable_reg = BD71837_REG_LDO1_VOLT,
	.enable_mask = BD71837_LDO_EN,
	.owner = THIS_MODULE,
	},
	{
	.name = "ldo2",
	.of_match = of_match_ptr("LDO2"),
	.regulators_node = of_match_ptr("regulators"),
	.id = BD71837_LDO2,
	.ops = &bd71837_ldo_regulator_nolinear_ops,
	.type = REGULATOR_VOLTAGE,
	.volt_table = &ldo_2_volts[0],
	.vsel_reg = BD71837_REG_LDO2_VOLT,
	.vsel_mask = LDO2_MASK,
	.n_voltages = ARRAY_SIZE(ldo_2_volts),
	.n_voltages = BD71837_LDO2_VOLTAGE_NUM,
	.enable_reg = BD71837_REG_LDO2_VOLT,
	.enable_mask = BD71837_LDO_EN,
	.owner = THIS_MODULE,
	},
	{
	.name = "ldo3",
	.of_match = of_match_ptr("LDO3"),
	.regulators_node = of_match_ptr("regulators"),
	.id = BD71837_LDO3,
	.ops = &bd71837_ldo_regulator_ops,
	.type = REGULATOR_VOLTAGE,
	.n_voltages = BD71837_LDO3_VOLTAGE_NUM,
	.linear_ranges = bd71837_ldo3_voltage_ranges,
	.n_linear_ranges = ARRAY_SIZE(bd71837_ldo3_voltage_ranges),
	.vsel_reg = BD71837_REG_LDO3_VOLT,
	.vsel_mask = LDO3_MASK,
	.enable_reg = BD71837_REG_LDO3_VOLT,
	.enable_mask = BD71837_LDO_EN,
	.owner = THIS_MODULE,
	},
	{
	.name = "ldo4",
	.of_match = of_match_ptr("LDO4"),
	.regulators_node = of_match_ptr("regulators"),
	.id = BD71837_LDO4,
	.ops = &bd71837_ldo_regulator_ops,
	.type = REGULATOR_VOLTAGE,
	.n_voltages = BD71837_LDO4_VOLTAGE_NUM,
	.linear_ranges = bd71837_ldo4_voltage_ranges,
	.n_linear_ranges = ARRAY_SIZE(bd71837_ldo4_voltage_ranges),
	.vsel_reg = BD71837_REG_LDO4_VOLT,
	.vsel_mask = LDO4_MASK,
	.enable_reg = BD71837_REG_LDO4_VOLT,
	.enable_mask = BD71837_LDO_EN,
	.owner = THIS_MODULE,
	},
	{
	.name = "ldo5",
	.of_match = of_match_ptr("LDO5"),
	.regulators_node = of_match_ptr("regulators"),
	.id = BD71837_LDO5,
	.ops = &bd71837_ldo_regulator_ops,
	.type = REGULATOR_VOLTAGE,
	.n_voltages = BD71837_LDO5_VOLTAGE_NUM,
	.linear_ranges = bd71837_ldo5_voltage_ranges,
	.n_linear_ranges = ARRAY_SIZE(bd71837_ldo5_voltage_ranges),
	/* LDO5 is supplied by buck6 */
	.supply_name = "buck6",
	.vsel_reg = BD71837_REG_LDO5_VOLT,
	.vsel_mask = LDO5_MASK,
	.enable_reg = BD71837_REG_LDO5_VOLT,
	.enable_mask = BD71837_LDO_EN,
	.owner = THIS_MODULE,
	},
	{
	.name = "ldo6",
	.of_match = of_match_ptr("LDO6"),
	.regulators_node = of_match_ptr("regulators"),
	.id = BD71837_LDO6,
	.ops = &bd71837_ldo_regulator_ops,
	.type = REGULATOR_VOLTAGE,
	.n_voltages = BD71837_LDO6_VOLTAGE_NUM,
	.linear_ranges = bd71837_ldo6_voltage_ranges,
	.n_linear_ranges = ARRAY_SIZE(bd71837_ldo6_voltage_ranges),
	/* LDO6 is supplied by buck7 */
	.supply_name = "buck7",
	.vsel_reg = BD71837_REG_LDO6_VOLT,
	.vsel_mask = LDO6_MASK,
	.enable_reg = BD71837_REG_LDO6_VOLT,
	.enable_mask = BD71837_LDO_EN,
	.owner = THIS_MODULE,
	},
	{
	.name = "ldo7",
	.of_match = of_match_ptr("LDO7"),
	.regulators_node = of_match_ptr("regulators"),
	.id = BD71837_LDO7,
	.ops = &bd71837_ldo_regulator_ops,
	.type = REGULATOR_VOLTAGE,
	.n_voltages = BD71837_LDO7_VOLTAGE_NUM,
	.linear_ranges = bd71837_ldo7_voltage_ranges,
	.n_linear_ranges = ARRAY_SIZE(bd71837_ldo7_voltage_ranges),
	.vsel_reg = BD71837_REG_LDO7_VOLT,
	.vsel_mask = LDO7_MASK,
	.enable_reg = BD71837_REG_LDO7_VOLT,
	.enable_mask = BD71837_LDO_EN,
	.owner = THIS_MODULE,
	},
	};

	struct reg_init {
	unsigned int reg;
	unsigned int mask;
	};

	static int bd71837_probe(struct platform_device *pdev)
	{
	struct bd71837_pmic *pmic;
	struct regulator_config config = { 0 };
	struct reg_init pmic_regulator_inits[] = {
	{
	.reg = BD71837_REG_BUCK1_CTRL,
	.mask = BD71837_BUCK_SEL,
	}, {
	.reg = BD71837_REG_BUCK2_CTRL,
	.mask = BD71837_BUCK_SEL,
	}, {
	.reg = BD71837_REG_BUCK3_CTRL,
	.mask = BD71837_BUCK_SEL,
	}, {
	.reg = BD71837_REG_BUCK4_CTRL,
	.mask = BD71837_BUCK_SEL,
	}, {
	.reg = BD71837_REG_BUCK5_CTRL,
	.mask = BD71837_BUCK_SEL,
	}, {
	.reg = BD71837_REG_BUCK6_CTRL,
	.mask = BD71837_BUCK_SEL,
	}, {
	.reg = BD71837_REG_BUCK7_CTRL,
	.mask = BD71837_BUCK_SEL,
	}, {
	.reg = BD71837_REG_BUCK8_CTRL,
	.mask = BD71837_BUCK_SEL,
	}, {
	.reg = BD71837_REG_LDO1_VOLT,
	.mask = BD71837_LDO_SEL,
	}, {
	.reg = BD71837_REG_LDO2_VOLT,
	.mask = BD71837_LDO_SEL,
	}, {
	.reg = BD71837_REG_LDO3_VOLT,
	.mask = BD71837_LDO_SEL,
	}, {
	.reg = BD71837_REG_LDO4_VOLT,
	.mask = BD71837_LDO_SEL,
	}, {
	.reg = BD71837_REG_LDO5_VOLT,
	.mask = BD71837_LDO_SEL,
	}, {
	.reg = BD71837_REG_LDO6_VOLT,
	.mask = BD71837_LDO_SEL,
	}, {
	.reg = BD71837_REG_LDO7_VOLT,
	.mask = BD71837_LDO_SEL,
	}
	};

	int i, err;

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

	memcpy(pmic->descs, bd71837_regulators, sizeof(pmic->descs));

	pmic->pdev = pdev;
	pmic->mfd = dev_get_drvdata(pdev->dev.parent);

	if (!pmic->mfd) {
	dev_err(&pdev->dev, "No MFD driver data\n");
	err = -EINVAL;
	goto err;
	}
	platform_set_drvdata(pdev, pmic);

	/* Register LOCK release */
	err = regmap_update_bits(pmic->mfd->regmap, BD71837_REG_REGLOCK,
	(REGLOCK_PWRSEQ \| REGLOCK_VREG), 0);
	if (err) {
	dev_err(&pmic->pdev->dev, "Failed to unlock PMIC (%d)\n", err);
	goto err;
	} else {
	dev_dbg(&pmic->pdev->dev, "Unlocked lock register 0x%x\n",
	BD71837_REG_REGLOCK);
	}

	/*
	* There is a HW quirk in BD71837. The shutdown sequence timings for
	* bucks/LDOs which are controlled via register interface are changed.
	* At PMIC poweroff the voltage for BUCK6/7 is cut immediately at the
	* beginning of shut-down sequence. As bucks 6 and 7 are parent
	* supplies for LDO5 and LDO6 - this causes LDO5/6 voltage
	* monitoring to errorneously detect under voltage and force PMIC to
	* emergency state instead of poweroff. In order to avoid this we
	* disable voltage monitoring for LDO5 and LDO6
	*/
	err = regmap_update_bits(pmic->mfd->regmap, BD718XX_REG_MVRFLTMASK2,
	BD718XX_LDO5_VRMON80 \| BD718XX_LDO6_VRMON80,
	BD718XX_LDO5_VRMON80 \| BD718XX_LDO6_VRMON80);
	if (err) {
	dev_err(&pmic->pdev->dev,
	"Failed to disable voltage monitoring\n");
	goto err;
	}

	for (i = 0; i < ARRAY_SIZE(pmic_regulator_inits); i++) {

	struct regulator_desc *desc;
	struct regulator_dev *rdev;

	desc = &pmic->descs[i];

	config.dev = pdev->dev.parent;
	config.driver_data = pmic;
	config.regmap = pmic->mfd->regmap;

	rdev = devm_regulator_register(&pdev->dev, desc, &config);
	if (IS_ERR(rdev)) {
	dev_err(pmic->mfd->dev,
	"failed to register %s regulator\n",
	desc->name);
	err = PTR_ERR(rdev);
	goto err;
	}
	/* Regulator register gets the regulator constraints and
	* applies them (set_machine_constraints). This should have
	* turned the control register(s) to correct values and we
	* can now switch the control from PMIC state machine to the
	* register interface
	*/
	err = regmap_update_bits(pmic->mfd->regmap,
	pmic_regulator_inits[i].reg,
	pmic_regulator_inits[i].mask,
	0xFFFFFFFF);
	if (err) {
	dev_err(&pmic->pdev->dev,
	"Failed to write BUCK/LDO SEL bit for (%s)\n",
	desc->name);
	goto err;
	}

	pmic->rdev[i] = rdev;
	}

	err:
	return err;
	}

	static struct platform_driver bd71837_regulator = {
	.driver = {
	.name = "bd71837-pmic",
	},
	.probe = bd71837_probe,
	};

	module_platform_driver(bd71837_regulator);

	MODULE_AUTHOR("Matti Vaittinen <matti.vaittinen@fi.rohmeurope.com>");
	MODULE_DESCRIPTION("BD71837 voltage regulator driver");
	MODULE_LICENSE("GPL");