// SPDX-License-Identifier: GPL-2.0
// Copyright (C) 2018 ROHM Semiconductors
// bd71837-regulator.c ROHM BD71837MWV/BD71847MWV regulator driver

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

/* Typical regulator startup times as per data sheet in uS */
#define BD71847_BUCK1_STARTUP_TIME 144
#define BD71847_BUCK2_STARTUP_TIME 162
#define BD71847_BUCK3_STARTUP_TIME 162
#define BD71847_BUCK4_STARTUP_TIME 240
#define BD71847_BUCK5_STARTUP_TIME 270
#define BD71847_BUCK6_STARTUP_TIME 200
#define BD71847_LDO1_STARTUP_TIME  440
#define BD71847_LDO2_STARTUP_TIME  370
#define BD71847_LDO3_STARTUP_TIME  310
#define BD71847_LDO4_STARTUP_TIME  400
#define BD71847_LDO5_STARTUP_TIME  530
#define BD71847_LDO6_STARTUP_TIME  400

#define BD71837_BUCK1_STARTUP_TIME 160
#define BD71837_BUCK2_STARTUP_TIME 180
#define BD71837_BUCK3_STARTUP_TIME 180
#define BD71837_BUCK4_STARTUP_TIME 180
#define BD71837_BUCK5_STARTUP_TIME 160
#define BD71837_BUCK6_STARTUP_TIME 240
#define BD71837_BUCK7_STARTUP_TIME 220
#define BD71837_BUCK8_STARTUP_TIME 200
#define BD71837_LDO1_STARTUP_TIME  440
#define BD71837_LDO2_STARTUP_TIME  370
#define BD71837_LDO3_STARTUP_TIME  310
#define BD71837_LDO4_STARTUP_TIME  400
#define BD71837_LDO5_STARTUP_TIME  310
#define BD71837_LDO6_STARTUP_TIME  400
#define BD71837_LDO7_STARTUP_TIME  530

/*
 * BD718(37/47/50) have two "enable control modes". ON/OFF can either be
 * controlled by software - or by PMIC internal HW state machine. Whether
 * regulator should be under SW or HW control can be defined from device-tree.
 * Let's provide separate ops for regulators to use depending on the "enable
 * control mode".
 */
#define BD718XX_HWOPNAME(swopname) swopname##_hwcontrol

#define BD718XX_OPS(name, _list_voltage, _map_voltage, _set_voltage_sel, \
		   _get_voltage_sel, _set_voltage_time_sel, _set_ramp_delay) \
static const struct regulator_ops name = {			\
	.enable = regulator_enable_regmap,			\
	.disable = regulator_disable_regmap,			\
	.is_enabled = regulator_is_enabled_regmap,		\
	.list_voltage = (_list_voltage),			\
	.map_voltage = (_map_voltage),				\
	.set_voltage_sel = (_set_voltage_sel),			\
	.get_voltage_sel = (_get_voltage_sel),			\
	.set_voltage_time_sel = (_set_voltage_time_sel),	\
	.set_ramp_delay = (_set_ramp_delay),			\
};								\
								\
static const struct regulator_ops BD718XX_HWOPNAME(name) = {	\
	.is_enabled = always_enabled_by_hwstate,		\
	.list_voltage = (_list_voltage),			\
	.map_voltage = (_map_voltage),				\
	.set_voltage_sel = (_set_voltage_sel),			\
	.get_voltage_sel = (_get_voltage_sel),			\
	.set_voltage_time_sel = (_set_voltage_time_sel),	\
	.set_ramp_delay = (_set_ramp_delay),			\
}								\

/*
 * 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 const unsigned int bd718xx_ramp_delay[] = { 10000, 5000, 2500, 1250 };

/* These functions are used when regulators are under HW state machine control.
 * We assume PMIC is in RUN state because SW running and able to query the
 * status. Most of the regulators have fixed ON or OFF state at RUN/IDLE so for
 * them we just return a constant. BD71837 BUCK3 and BUCK4 are exceptions as
 * they support configuring the ON/OFF state for RUN.
 *
 * Note for next hacker - these PMICs have a register where the HW state can be
 * read. If assuming RUN appears to be false in your use-case - you can
 * implement state reading (although that is not going to be atomic) before
 * returning the enable state.
 */
static int always_enabled_by_hwstate(struct regulator_dev *rdev)
{
	return 1;
}

static int never_enabled_by_hwstate(struct regulator_dev *rdev)
{
	return 0;
}

static int bd71837_get_buck34_enable_hwctrl(struct regulator_dev *rdev)
{
	int ret;
	unsigned int val;

	ret = regmap_read(rdev->regmap, rdev->desc->enable_reg, &val);
	if (ret)
		return ret;

	return !!(BD718XX_BUCK_RUN_ON & val);
}
/*
 * On BD71837 (not on BD71847, BD71850, ...)
 * 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.
 *
 * On BD71847, BD71850, ... The LDO voltage can be changed when LDO is
 * enabled. But if voltage is increased the LDO power-good monitoring
 * must be disabled for the duration of changing + 1mS to ensure voltage
 * has reached the higher level before HW does next under voltage detection
 * cycle.
 */
static int bd71837_set_voltage_sel_restricted(struct regulator_dev *rdev,
						    unsigned int sel)
{
	if (rdev->desc->ops->is_enabled(rdev))
		return -EBUSY;

	return regulator_set_voltage_sel_regmap(rdev, sel);
}

static void voltage_change_done(struct regulator_dev *rdev, unsigned int sel,
				unsigned int *mask)
{
	int ret;

	if (*mask) {
		/*
		 * Let's allow scheduling as we use I2C anyways. We just need to
		 * guarantee minimum of 1ms sleep - it shouldn't matter if we
		 * exceed it due to the scheduling.
		 */
		msleep(1);
		/*
		 * Note for next hacker. The PWRGOOD should not be masked on
		 * BD71847 so we will just unconditionally enable detection
		 * when voltage is set.
		 * If someone want's to disable PWRGOOD he must implement
		 * caching and restoring the old value here. I am not
		 * aware of such use-cases so for the sake of the simplicity
		 * we just always enable PWRGOOD here.
		 */
		ret = regmap_update_bits(rdev->regmap, BD718XX_REG_MVRFLTMASK2,
					 *mask, 0);
		if (ret)
			dev_err(&rdev->dev,
				"Failed to re-enable voltage monitoring (%d)\n",
				ret);
	}
}

static int voltage_change_prepare(struct regulator_dev *rdev, unsigned int sel,
				  unsigned int *mask)
{
	int ret;

	*mask = 0;
	if (rdev->desc->ops->is_enabled(rdev)) {
		int now, new;

		now = rdev->desc->ops->get_voltage_sel(rdev);
		if (now < 0)
			return now;

		now = rdev->desc->ops->list_voltage(rdev, now);
		if (now < 0)
			return now;

		new = rdev->desc->ops->list_voltage(rdev, sel);
		if (new < 0)
			return new;

		/*
		 * If we increase LDO voltage when LDO is enabled we need to
		 * disable the power-good detection until voltage has reached
		 * the new level. According to HW colleagues the maximum time
		 * it takes is 1000us. I assume that on systems with light load
		 * this might be less - and we could probably use DT to give
		 * system specific delay value if performance matters.
		 *
		 * Well, knowing we use I2C here and can add scheduling delays
		 * I don't think it is worth the hassle and I just add fixed
		 * 1ms sleep here (and allow scheduling). If this turns out to
		 * be a problem we can change it to delay and make the delay
		 * time configurable.
		 */
		if (new > now) {
			int ldo_offset = rdev->desc->id - BD718XX_LDO1;

			*mask = BD718XX_LDO1_VRMON80 << ldo_offset;
			ret = regmap_update_bits(rdev->regmap,
						 BD718XX_REG_MVRFLTMASK2,
						 *mask, *mask);
			if (ret) {
				dev_err(&rdev->dev,
					"Failed to stop voltage monitoring\n");
				return ret;
			}
		}
	}

	return 0;
}

static int bd718xx_set_voltage_sel_restricted(struct regulator_dev *rdev,
						    unsigned int sel)
{
	int ret;
	int mask;

	ret = voltage_change_prepare(rdev, sel, &mask);
	if (ret)
		return ret;

	ret = regulator_set_voltage_sel_regmap(rdev, sel);
	voltage_change_done(rdev, sel, &mask);

	return ret;
}

static int bd718xx_set_voltage_sel_pickable_restricted(
		struct regulator_dev *rdev, unsigned int sel)
{
	int ret;
	int mask;

	ret = voltage_change_prepare(rdev, sel, &mask);
	if (ret)
		return ret;

	ret = regulator_set_voltage_sel_pickable_regmap(rdev, sel);
	voltage_change_done(rdev, sel, &mask);

	return ret;
}

static int bd71837_set_voltage_sel_pickable_restricted(
		struct regulator_dev *rdev, unsigned int sel)
{
	if (rdev->desc->ops->is_enabled(rdev))
		return -EBUSY;

	return regulator_set_voltage_sel_pickable_regmap(rdev, sel);
}

/*
 * OPS common for BD71847 and BD71850
 */
BD718XX_OPS(bd718xx_pickable_range_ldo_ops,
	    regulator_list_voltage_pickable_linear_range, NULL,
	    bd718xx_set_voltage_sel_pickable_restricted,
	    regulator_get_voltage_sel_pickable_regmap, NULL, NULL);

/* BD71847 and BD71850 LDO 5 is by default OFF at RUN state */
static const struct regulator_ops bd718xx_ldo5_ops_hwstate = {
	.is_enabled = never_enabled_by_hwstate,
	.list_voltage = regulator_list_voltage_pickable_linear_range,
	.set_voltage_sel = bd718xx_set_voltage_sel_pickable_restricted,
	.get_voltage_sel = regulator_get_voltage_sel_pickable_regmap,
};

BD718XX_OPS(bd718xx_pickable_range_buck_ops,
	    regulator_list_voltage_pickable_linear_range, NULL,
	    regulator_set_voltage_sel_pickable_regmap,
	    regulator_get_voltage_sel_pickable_regmap,
	    regulator_set_voltage_time_sel, NULL);

BD718XX_OPS(bd718xx_ldo_regulator_ops, regulator_list_voltage_linear_range,
	    NULL, bd718xx_set_voltage_sel_restricted,
	    regulator_get_voltage_sel_regmap, NULL, NULL);

BD718XX_OPS(bd718xx_ldo_regulator_nolinear_ops, regulator_list_voltage_table,
	    NULL, bd718xx_set_voltage_sel_restricted,
	    regulator_get_voltage_sel_regmap, NULL, NULL);

BD718XX_OPS(bd718xx_buck_regulator_ops, regulator_list_voltage_linear_range,
	    NULL, regulator_set_voltage_sel_regmap,
	    regulator_get_voltage_sel_regmap, regulator_set_voltage_time_sel,
	    NULL);

BD718XX_OPS(bd718xx_buck_regulator_nolinear_ops, regulator_list_voltage_table,
	    regulator_map_voltage_ascend, regulator_set_voltage_sel_regmap,
	    regulator_get_voltage_sel_regmap, regulator_set_voltage_time_sel,
	    NULL);

/*
 * OPS for BD71837
 */
BD718XX_OPS(bd71837_pickable_range_ldo_ops,
	    regulator_list_voltage_pickable_linear_range, NULL,
	    bd71837_set_voltage_sel_pickable_restricted,
	    regulator_get_voltage_sel_pickable_regmap, NULL, NULL);

BD718XX_OPS(bd71837_pickable_range_buck_ops,
	    regulator_list_voltage_pickable_linear_range, NULL,
	    bd71837_set_voltage_sel_pickable_restricted,
	    regulator_get_voltage_sel_pickable_regmap,
	    regulator_set_voltage_time_sel, NULL);

BD718XX_OPS(bd71837_ldo_regulator_ops, regulator_list_voltage_linear_range,
	    NULL, bd71837_set_voltage_sel_restricted,
	    regulator_get_voltage_sel_regmap, NULL, NULL);

BD718XX_OPS(bd71837_ldo_regulator_nolinear_ops, regulator_list_voltage_table,
	    NULL, bd71837_set_voltage_sel_restricted,
	    regulator_get_voltage_sel_regmap, NULL, NULL);

BD718XX_OPS(bd71837_buck_regulator_ops, regulator_list_voltage_linear_range,
	    NULL, bd71837_set_voltage_sel_restricted,
	    regulator_get_voltage_sel_regmap, regulator_set_voltage_time_sel,
	    NULL);

BD718XX_OPS(bd71837_buck_regulator_nolinear_ops, regulator_list_voltage_table,
	    regulator_map_voltage_ascend, bd718xx_set_voltage_sel_restricted,
	    regulator_get_voltage_sel_regmap, regulator_set_voltage_time_sel,
	    NULL);
/*
 * BD71837 bucks 3 and 4 support defining their enable/disable state also
 * when buck enable state is under HW state machine control. In that case the
 * bit [2] in CTRL register is used to indicate if regulator should be ON.
 */
static const struct regulator_ops bd71837_buck34_ops_hwctrl = {
	.is_enabled = bd71837_get_buck34_enable_hwctrl,
	.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 = regulator_set_ramp_delay_regmap,
};

/*
 * OPS for all of the ICs - BD718(37/47/50)
 */
BD718XX_OPS(bd718xx_dvs_buck_regulator_ops, regulator_list_voltage_linear_range,
	    NULL, regulator_set_voltage_sel_regmap,
	    regulator_get_voltage_sel_regmap, regulator_set_voltage_time_sel,
	    /* bd718xx_buck1234_set_ramp_delay */ regulator_set_ramp_delay_regmap);

/*
 * BD71837 BUCK1/2/3/4
 * BD71847 BUCK1/2
 * 0.70 to 1.30V (10mV step)
 */
static const struct linear_range bd718xx_dvs_buck_volts[] = {
	REGULATOR_LINEAR_RANGE(700000, 0x00, 0x3C, 10000),
	REGULATOR_LINEAR_RANGE(1300000, 0x3D, 0x3F, 0),
};

/*
 * BD71837 BUCK5
 * 0.7V to 1.35V  (range 0)
 * and
 * 0.675 to 1.325 (range 1)
 */
static const struct linear_range bd71837_buck5_volts[] = {
	/* Ranges when VOLT_SEL bit is 0 */
	REGULATOR_LINEAR_RANGE(700000, 0x00, 0x03, 100000),
	REGULATOR_LINEAR_RANGE(1050000, 0x04, 0x05, 50000),
	REGULATOR_LINEAR_RANGE(1200000, 0x06, 0x07, 150000),
	/* Ranges when VOLT_SEL bit is 1  */
	REGULATOR_LINEAR_RANGE(675000, 0x0, 0x3, 100000),
	REGULATOR_LINEAR_RANGE(1025000, 0x4, 0x5, 50000),
	REGULATOR_LINEAR_RANGE(1175000, 0x6, 0x7, 150000),
};

/*
 * Range selector for first 3 linear ranges is 0x0
 * and 0x1 for last 3 ranges.
 */
static const unsigned int bd71837_buck5_volt_range_sel[] = {
	0x0, 0x0, 0x0, 0x80, 0x80, 0x80
};

/*
 * BD71847 BUCK3
 */
static const struct linear_range bd71847_buck3_volts[] = {
	/* Ranges when VOLT_SEL bits are 00 */
	REGULATOR_LINEAR_RANGE(700000, 0x00, 0x03, 100000),
	REGULATOR_LINEAR_RANGE(1050000, 0x04, 0x05, 50000),
	REGULATOR_LINEAR_RANGE(1200000, 0x06, 0x07, 150000),
	/* Ranges when VOLT_SEL bits are 01 */
	REGULATOR_LINEAR_RANGE(550000, 0x0, 0x7, 50000),
	/* Ranges when VOLT_SEL bits are 11 */
	REGULATOR_LINEAR_RANGE(675000, 0x0, 0x3, 100000),
	REGULATOR_LINEAR_RANGE(1025000, 0x4, 0x5, 50000),
	REGULATOR_LINEAR_RANGE(1175000, 0x6, 0x7, 150000),
};

static const unsigned int bd71847_buck3_volt_range_sel[] = {
	0x0, 0x0, 0x0, 0x40, 0x80, 0x80, 0x80
};

static const struct linear_range bd71847_buck4_volts[] = {
	REGULATOR_LINEAR_RANGE(3000000, 0x00, 0x03, 100000),
	REGULATOR_LINEAR_RANGE(2600000, 0x00, 0x03, 100000),
};

static const unsigned int bd71847_buck4_volt_range_sel[] = { 0x0, 0x40 };

/*
 * BUCK6
 * 3.0V to 3.3V (step 100mV)
 */
static const struct linear_range bd71837_buck6_volts[] = {
	REGULATOR_LINEAR_RANGE(3000000, 0x00, 0x03, 100000),
};

/*
 * BD71837 BUCK7
 * BD71847 BUCK5
 * 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 bd718xx_3rd_nodvs_buck_volts[] = {
	1605000, 1695000, 1755000, 1800000, 1845000, 1905000, 1950000, 1995000
};

/*
 * BUCK8
 * 0.8V to 1.40V (step 10mV)
 */
static const struct linear_range bd718xx_4th_nodvs_buck_volts[] = {
	REGULATOR_LINEAR_RANGE(800000, 0x00, 0x3C, 10000),
};

/*
 * LDO1
 * 3.0 to 3.3V (100mV step)
 */
static const struct linear_range bd718xx_ldo1_volts[] = {
	REGULATOR_LINEAR_RANGE(3000000, 0x00, 0x03, 100000),
	REGULATOR_LINEAR_RANGE(1600000, 0x00, 0x03, 100000),
};

static const unsigned int bd718xx_ldo1_volt_range_sel[] = { 0x0, 0x20 };

/*
 * 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 linear_range bd718xx_ldo3_volts[] = {
	REGULATOR_LINEAR_RANGE(1800000, 0x00, 0x0F, 100000),
};

/*
 * LDO4
 * 0.9 to 1.8V (100mV step)
 */
static const struct linear_range bd718xx_ldo4_volts[] = {
	REGULATOR_LINEAR_RANGE(900000, 0x00, 0x09, 100000),
};

/*
 * LDO5 for BD71837
 * 1.8 to 3.3V (100mV step)
 */
static const struct linear_range bd71837_ldo5_volts[] = {
	REGULATOR_LINEAR_RANGE(1800000, 0x00, 0x0F, 100000),
};

/*
 * LDO5 for BD71837
 * 1.8 to 3.3V (100mV step)
 */
static const struct linear_range bd71847_ldo5_volts[] = {
	REGULATOR_LINEAR_RANGE(1800000, 0x00, 0x0F, 100000),
	REGULATOR_LINEAR_RANGE(800000, 0x00, 0x0F, 100000),
};

static const unsigned int bd71847_ldo5_volt_range_sel[] = { 0x0, 0x20 };

/*
 * LDO6
 * 0.9 to 1.8V (100mV step)
 */
static const struct linear_range bd718xx_ldo6_volts[] = {
	REGULATOR_LINEAR_RANGE(900000, 0x00, 0x09, 100000),
};

/*
 * LDO7
 * 1.8 to 3.3V (100mV step)
 */
static const struct linear_range bd71837_ldo7_volts[] = {
	REGULATOR_LINEAR_RANGE(1800000, 0x00, 0x0F, 100000),
};

struct reg_init {
	unsigned int reg;
	unsigned int mask;
	unsigned int val;
};
struct bd718xx_regulator_data {
	struct regulator_desc desc;
	const struct rohm_dvs_config dvs;
	const struct reg_init init;
	const struct reg_init *additional_inits;
	int additional_init_amnt;
};

/*
 * 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
 */
static const struct reg_init bd71837_ldo5_inits[] = {
	{
		.reg = BD718XX_REG_MVRFLTMASK2,
		.mask = BD718XX_LDO5_VRMON80,
		.val = BD718XX_LDO5_VRMON80,
	},
};

static const struct reg_init bd71837_ldo6_inits[] = {
	{
		.reg = BD718XX_REG_MVRFLTMASK2,
		.mask = BD718XX_LDO6_VRMON80,
		.val = BD718XX_LDO6_VRMON80,
	},
};

static int buck_set_hw_dvs_levels(struct device_node *np,
			    const struct regulator_desc *desc,
			    struct regulator_config *cfg)
{
	struct bd718xx_regulator_data *data;

	data = container_of(desc, struct bd718xx_regulator_data, desc);

	return rohm_regulator_set_dvs_levels(&data->dvs, np, desc, cfg->regmap);
}

static const struct regulator_ops *bd71847_swcontrol_ops[] = {
	&bd718xx_dvs_buck_regulator_ops, &bd718xx_dvs_buck_regulator_ops,
	&bd718xx_pickable_range_buck_ops, &bd718xx_pickable_range_buck_ops,
	&bd718xx_buck_regulator_nolinear_ops, &bd718xx_buck_regulator_ops,
	&bd718xx_pickable_range_ldo_ops, &bd718xx_ldo_regulator_nolinear_ops,
	&bd718xx_ldo_regulator_ops, &bd718xx_ldo_regulator_ops,
	&bd718xx_pickable_range_ldo_ops, &bd718xx_ldo_regulator_ops,
};

static const struct regulator_ops *bd71847_hwcontrol_ops[] = {
	&BD718XX_HWOPNAME(bd718xx_dvs_buck_regulator_ops),
	&BD718XX_HWOPNAME(bd718xx_dvs_buck_regulator_ops),
	&BD718XX_HWOPNAME(bd718xx_pickable_range_buck_ops),
	&BD718XX_HWOPNAME(bd718xx_pickable_range_buck_ops),
	&BD718XX_HWOPNAME(bd718xx_buck_regulator_nolinear_ops),
	&BD718XX_HWOPNAME(bd718xx_buck_regulator_ops),
	&BD718XX_HWOPNAME(bd718xx_pickable_range_ldo_ops),
	&BD718XX_HWOPNAME(bd718xx_ldo_regulator_nolinear_ops),
	&BD718XX_HWOPNAME(bd718xx_ldo_regulator_ops),
	&BD718XX_HWOPNAME(bd718xx_ldo_regulator_ops),
	&bd718xx_ldo5_ops_hwstate,
	&BD718XX_HWOPNAME(bd718xx_ldo_regulator_ops),
};

static struct bd718xx_regulator_data bd71847_regulators[] = {
	{
		.desc = {
			.name = "buck1",
			.of_match = of_match_ptr("BUCK1"),
			.regulators_node = of_match_ptr("regulators"),
			.id = BD718XX_BUCK1,
			.type = REGULATOR_VOLTAGE,
			.n_voltages = BD718XX_DVS_BUCK_VOLTAGE_NUM,
			.linear_ranges = bd718xx_dvs_buck_volts,
			.n_linear_ranges =
				ARRAY_SIZE(bd718xx_dvs_buck_volts),
			.vsel_reg = BD718XX_REG_BUCK1_VOLT_RUN,
			.vsel_mask = DVS_BUCK_RUN_MASK,
			.enable_reg = BD718XX_REG_BUCK1_CTRL,
			.enable_mask = BD718XX_BUCK_EN,
			.enable_time = BD71847_BUCK1_STARTUP_TIME,
			.owner = THIS_MODULE,
			.ramp_delay_table = bd718xx_ramp_delay,
			.n_ramp_values = ARRAY_SIZE(bd718xx_ramp_delay),
			.ramp_reg = BD718XX_REG_BUCK1_CTRL,
			.ramp_mask = BUCK_RAMPRATE_MASK,
			.of_parse_cb = buck_set_hw_dvs_levels,
		},
		.dvs = {
			.level_map = ROHM_DVS_LEVEL_RUN | ROHM_DVS_LEVEL_IDLE |
				     ROHM_DVS_LEVEL_SUSPEND,
			.run_reg = BD718XX_REG_BUCK1_VOLT_RUN,
			.run_mask = DVS_BUCK_RUN_MASK,
			.idle_reg = BD718XX_REG_BUCK1_VOLT_IDLE,
			.idle_mask = DVS_BUCK_RUN_MASK,
			.suspend_reg = BD718XX_REG_BUCK1_VOLT_SUSP,
			.suspend_mask = DVS_BUCK_RUN_MASK,
		},
		.init = {
			.reg = BD718XX_REG_BUCK1_CTRL,
			.mask = BD718XX_BUCK_SEL,
			.val = BD718XX_BUCK_SEL,
		},
	},
	{
		.desc = {
			.name = "buck2",
			.of_match = of_match_ptr("BUCK2"),
			.regulators_node = of_match_ptr("regulators"),
			.id = BD718XX_BUCK2,
			.type = REGULATOR_VOLTAGE,
			.n_voltages = BD718XX_DVS_BUCK_VOLTAGE_NUM,
			.linear_ranges = bd718xx_dvs_buck_volts,
			.n_linear_ranges = ARRAY_SIZE(bd718xx_dvs_buck_volts),
			.vsel_reg = BD718XX_REG_BUCK2_VOLT_RUN,
			.vsel_mask = DVS_BUCK_RUN_MASK,
			.enable_reg = BD718XX_REG_BUCK2_CTRL,
			.enable_mask = BD718XX_BUCK_EN,
			.enable_time = BD71847_BUCK2_STARTUP_TIME,
			.ramp_delay_table = bd718xx_ramp_delay,
			.n_ramp_values = ARRAY_SIZE(bd718xx_ramp_delay),
			.ramp_reg = BD718XX_REG_BUCK2_CTRL,
			.ramp_mask = BUCK_RAMPRATE_MASK,
			.owner = THIS_MODULE,
			.of_parse_cb = buck_set_hw_dvs_levels,
		},
		.dvs = {
			.level_map = ROHM_DVS_LEVEL_RUN | ROHM_DVS_LEVEL_IDLE,
			.run_reg = BD718XX_REG_BUCK2_VOLT_RUN,
			.run_mask = DVS_BUCK_RUN_MASK,
			.idle_reg = BD718XX_REG_BUCK2_VOLT_IDLE,
			.idle_mask = DVS_BUCK_RUN_MASK,
		},
		.init = {
			.reg = BD718XX_REG_BUCK2_CTRL,
			.mask = BD718XX_BUCK_SEL,
			.val = BD718XX_BUCK_SEL,
		},
	},
	{
		.desc = {
			.name = "buck3",
			.of_match = of_match_ptr("BUCK3"),
			.regulators_node = of_match_ptr("regulators"),
			.id = BD718XX_BUCK3,
			.type = REGULATOR_VOLTAGE,
			.n_voltages = BD71847_BUCK3_VOLTAGE_NUM,
			.linear_ranges = bd71847_buck3_volts,
			.n_linear_ranges =
				ARRAY_SIZE(bd71847_buck3_volts),
			.vsel_reg = BD718XX_REG_1ST_NODVS_BUCK_VOLT,
			.vsel_mask = BD718XX_1ST_NODVS_BUCK_MASK,
			.vsel_range_reg = BD718XX_REG_1ST_NODVS_BUCK_VOLT,
			.vsel_range_mask = BD71847_BUCK3_RANGE_MASK,
			.linear_range_selectors = bd71847_buck3_volt_range_sel,
			.enable_reg = BD718XX_REG_1ST_NODVS_BUCK_CTRL,
			.enable_mask = BD718XX_BUCK_EN,
			.enable_time = BD71847_BUCK3_STARTUP_TIME,
			.owner = THIS_MODULE,
		},
		.init = {
			.reg = BD718XX_REG_1ST_NODVS_BUCK_CTRL,
			.mask = BD718XX_BUCK_SEL,
			.val = BD718XX_BUCK_SEL,
		},
	},
	{
		.desc = {
			.name = "buck4",
			.of_match = of_match_ptr("BUCK4"),
			.regulators_node = of_match_ptr("regulators"),
			.id = BD718XX_BUCK4,
			.type = REGULATOR_VOLTAGE,
			.n_voltages = BD71847_BUCK4_VOLTAGE_NUM,
			.linear_ranges = bd71847_buck4_volts,
			.n_linear_ranges =
				ARRAY_SIZE(bd71847_buck4_volts),
			.enable_reg = BD718XX_REG_2ND_NODVS_BUCK_CTRL,
			.vsel_reg = BD718XX_REG_2ND_NODVS_BUCK_VOLT,
			.vsel_mask = BD71847_BUCK4_MASK,
			.vsel_range_reg = BD718XX_REG_2ND_NODVS_BUCK_VOLT,
			.vsel_range_mask = BD71847_BUCK4_RANGE_MASK,
			.linear_range_selectors = bd71847_buck4_volt_range_sel,
			.enable_mask = BD718XX_BUCK_EN,
			.enable_time = BD71847_BUCK4_STARTUP_TIME,
			.owner = THIS_MODULE,
		},
		.init = {
			.reg = BD718XX_REG_2ND_NODVS_BUCK_CTRL,
			.mask = BD718XX_BUCK_SEL,
			.val = BD718XX_BUCK_SEL,
		},
	},
	{
		.desc = {
			.name = "buck5",
			.of_match = of_match_ptr("BUCK5"),
			.regulators_node = of_match_ptr("regulators"),
			.id = BD718XX_BUCK5,
			.type = REGULATOR_VOLTAGE,
			.volt_table = &bd718xx_3rd_nodvs_buck_volts[0],
			.n_voltages = ARRAY_SIZE(bd718xx_3rd_nodvs_buck_volts),
			.vsel_reg = BD718XX_REG_3RD_NODVS_BUCK_VOLT,
			.vsel_mask = BD718XX_3RD_NODVS_BUCK_MASK,
			.enable_reg = BD718XX_REG_3RD_NODVS_BUCK_CTRL,
			.enable_mask = BD718XX_BUCK_EN,
			.enable_time = BD71847_BUCK5_STARTUP_TIME,
			.owner = THIS_MODULE,
		},
		.init = {
			.reg = BD718XX_REG_3RD_NODVS_BUCK_CTRL,
			.mask = BD718XX_BUCK_SEL,
			.val = BD718XX_BUCK_SEL,
		},
	},
	{
		.desc = {
			.name = "buck6",
			.of_match = of_match_ptr("BUCK6"),
			.regulators_node = of_match_ptr("regulators"),
			.id = BD718XX_BUCK6,
			.type = REGULATOR_VOLTAGE,
			.n_voltages = BD718XX_4TH_NODVS_BUCK_VOLTAGE_NUM,
			.linear_ranges = bd718xx_4th_nodvs_buck_volts,
			.n_linear_ranges =
				ARRAY_SIZE(bd718xx_4th_nodvs_buck_volts),
			.vsel_reg = BD718XX_REG_4TH_NODVS_BUCK_VOLT,
			.vsel_mask = BD718XX_4TH_NODVS_BUCK_MASK,
			.enable_reg = BD718XX_REG_4TH_NODVS_BUCK_CTRL,
			.enable_mask = BD718XX_BUCK_EN,
			.enable_time = BD71847_BUCK6_STARTUP_TIME,
			.owner = THIS_MODULE,
		},
		.init = {
			.reg = BD718XX_REG_4TH_NODVS_BUCK_CTRL,
			.mask = BD718XX_BUCK_SEL,
			.val = BD718XX_BUCK_SEL,
		},
	},
	{
		.desc = {
			.name = "ldo1",
			.of_match = of_match_ptr("LDO1"),
			.regulators_node = of_match_ptr("regulators"),
			.id = BD718XX_LDO1,
			.type = REGULATOR_VOLTAGE,
			.n_voltages = BD718XX_LDO1_VOLTAGE_NUM,
			.linear_ranges = bd718xx_ldo1_volts,
			.n_linear_ranges = ARRAY_SIZE(bd718xx_ldo1_volts),
			.vsel_reg = BD718XX_REG_LDO1_VOLT,
			.vsel_mask = BD718XX_LDO1_MASK,
			.vsel_range_reg = BD718XX_REG_LDO1_VOLT,
			.vsel_range_mask = BD718XX_LDO1_RANGE_MASK,
			.linear_range_selectors = bd718xx_ldo1_volt_range_sel,
			.enable_reg = BD718XX_REG_LDO1_VOLT,
			.enable_mask = BD718XX_LDO_EN,
			.enable_time = BD71847_LDO1_STARTUP_TIME,
			.owner = THIS_MODULE,
		},
		.init = {
			.reg = BD718XX_REG_LDO1_VOLT,
			.mask = BD718XX_LDO_SEL,
			.val = BD718XX_LDO_SEL,
		},
	},
	{
		.desc = {
			.name = "ldo2",
			.of_match = of_match_ptr("LDO2"),
			.regulators_node = of_match_ptr("regulators"),
			.id = BD718XX_LDO2,
			.type = REGULATOR_VOLTAGE,
			.volt_table = &ldo_2_volts[0],
			.vsel_reg = BD718XX_REG_LDO2_VOLT,
			.vsel_mask = BD718XX_LDO2_MASK,
			.n_voltages = ARRAY_SIZE(ldo_2_volts),
			.enable_reg = BD718XX_REG_LDO2_VOLT,
			.enable_mask = BD718XX_LDO_EN,
			.enable_time = BD71847_LDO2_STARTUP_TIME,
			.owner = THIS_MODULE,
		},
		.init = {
			.reg = BD718XX_REG_LDO2_VOLT,
			.mask = BD718XX_LDO_SEL,
			.val = BD718XX_LDO_SEL,
		},
	},
	{
		.desc = {
			.name = "ldo3",
			.of_match = of_match_ptr("LDO3"),
			.regulators_node = of_match_ptr("regulators"),
			.id = BD718XX_LDO3,
			.type = REGULATOR_VOLTAGE,
			.n_voltages = BD718XX_LDO3_VOLTAGE_NUM,
			.linear_ranges = bd718xx_ldo3_volts,
			.n_linear_ranges = ARRAY_SIZE(bd718xx_ldo3_volts),
			.vsel_reg = BD718XX_REG_LDO3_VOLT,
			.vsel_mask = BD718XX_LDO3_MASK,
			.enable_reg = BD718XX_REG_LDO3_VOLT,
			.enable_mask = BD718XX_LDO_EN,
			.enable_time = BD71847_LDO3_STARTUP_TIME,
			.owner = THIS_MODULE,
		},
		.init = {
			.reg = BD718XX_REG_LDO3_VOLT,
			.mask = BD718XX_LDO_SEL,
			.val = BD718XX_LDO_SEL,
		},
	},
	{
		.desc = {
			.name = "ldo4",
			.of_match = of_match_ptr("LDO4"),
			.regulators_node = of_match_ptr("regulators"),
			.id = BD718XX_LDO4,
			.type = REGULATOR_VOLTAGE,
			.n_voltages = BD718XX_LDO4_VOLTAGE_NUM,
			.linear_ranges = bd718xx_ldo4_volts,
			.n_linear_ranges = ARRAY_SIZE(bd718xx_ldo4_volts),
			.vsel_reg = BD718XX_REG_LDO4_VOLT,
			.vsel_mask = BD718XX_LDO4_MASK,
			.enable_reg = BD718XX_REG_LDO4_VOLT,
			.enable_mask = BD718XX_LDO_EN,
			.enable_time = BD71847_LDO4_STARTUP_TIME,
			.owner = THIS_MODULE,
		},
		.init = {
			.reg = BD718XX_REG_LDO4_VOLT,
			.mask = BD718XX_LDO_SEL,
			.val = BD718XX_LDO_SEL,
		},
	},
	{
		.desc = {
			.name = "ldo5",
			.of_match = of_match_ptr("LDO5"),
			.regulators_node = of_match_ptr("regulators"),
			.id = BD718XX_LDO5,
			.type = REGULATOR_VOLTAGE,
			.n_voltages = BD71847_LDO5_VOLTAGE_NUM,
			.linear_ranges = bd71847_ldo5_volts,
			.n_linear_ranges = ARRAY_SIZE(bd71847_ldo5_volts),
			.vsel_reg = BD718XX_REG_LDO5_VOLT,
			.vsel_mask = BD71847_LDO5_MASK,
			.vsel_range_reg = BD718XX_REG_LDO5_VOLT,
			.vsel_range_mask = BD71847_LDO5_RANGE_MASK,
			.linear_range_selectors = bd71847_ldo5_volt_range_sel,
			.enable_reg = BD718XX_REG_LDO5_VOLT,
			.enable_mask = BD718XX_LDO_EN,
			.enable_time = BD71847_LDO5_STARTUP_TIME,
			.owner = THIS_MODULE,
		},
		.init = {
			.reg = BD718XX_REG_LDO5_VOLT,
			.mask = BD718XX_LDO_SEL,
			.val = BD718XX_LDO_SEL,
		},
	},
	{
		.desc = {
			.name = "ldo6",
			.of_match = of_match_ptr("LDO6"),
			.regulators_node = of_match_ptr("regulators"),
			.id = BD718XX_LDO6,
			.type = REGULATOR_VOLTAGE,
			.n_voltages = BD718XX_LDO6_VOLTAGE_NUM,
			.linear_ranges = bd718xx_ldo6_volts,
			.n_linear_ranges = ARRAY_SIZE(bd718xx_ldo6_volts),
			/* LDO6 is supplied by buck5 */
			.supply_name = "buck5",
			.vsel_reg = BD718XX_REG_LDO6_VOLT,
			.vsel_mask = BD718XX_LDO6_MASK,
			.enable_reg = BD718XX_REG_LDO6_VOLT,
			.enable_mask = BD718XX_LDO_EN,
			.enable_time = BD71847_LDO6_STARTUP_TIME,
			.owner = THIS_MODULE,
		},
		.init = {
			.reg = BD718XX_REG_LDO6_VOLT,
			.mask = BD718XX_LDO_SEL,
			.val = BD718XX_LDO_SEL,
		},
	},
};

static const struct regulator_ops *bd71837_swcontrol_ops[] = {
	&bd718xx_dvs_buck_regulator_ops, &bd718xx_dvs_buck_regulator_ops,
	&bd718xx_dvs_buck_regulator_ops, &bd718xx_dvs_buck_regulator_ops,
	&bd71837_pickable_range_buck_ops, &bd71837_buck_regulator_ops,
	&bd71837_buck_regulator_nolinear_ops, &bd71837_buck_regulator_ops,
	&bd71837_pickable_range_ldo_ops, &bd71837_ldo_regulator_nolinear_ops,
	&bd71837_ldo_regulator_ops, &bd71837_ldo_regulator_ops,
	&bd71837_ldo_regulator_ops, &bd71837_ldo_regulator_ops,
	&bd71837_ldo_regulator_ops,
};

static const struct regulator_ops *bd71837_hwcontrol_ops[] = {
	&BD718XX_HWOPNAME(bd718xx_dvs_buck_regulator_ops),
	&BD718XX_HWOPNAME(bd718xx_dvs_buck_regulator_ops),
	&bd71837_buck34_ops_hwctrl, &bd71837_buck34_ops_hwctrl,
	&BD718XX_HWOPNAME(bd71837_pickable_range_buck_ops),
	&BD718XX_HWOPNAME(bd71837_buck_regulator_ops),
	&BD718XX_HWOPNAME(bd71837_buck_regulator_nolinear_ops),
	&BD718XX_HWOPNAME(bd71837_buck_regulator_ops),
	&BD718XX_HWOPNAME(bd71837_pickable_range_ldo_ops),
	&BD718XX_HWOPNAME(bd71837_ldo_regulator_nolinear_ops),
	&BD718XX_HWOPNAME(bd71837_ldo_regulator_ops),
	&BD718XX_HWOPNAME(bd71837_ldo_regulator_ops),
	&BD718XX_HWOPNAME(bd71837_ldo_regulator_ops),
	&BD718XX_HWOPNAME(bd71837_ldo_regulator_ops),
	&BD718XX_HWOPNAME(bd71837_ldo_regulator_ops),
};

static struct bd718xx_regulator_data bd71837_regulators[] = {
	{
		.desc = {
			.name = "buck1",
			.of_match = of_match_ptr("BUCK1"),
			.regulators_node = of_match_ptr("regulators"),
			.id = BD718XX_BUCK1,
			.type = REGULATOR_VOLTAGE,
			.n_voltages = BD718XX_DVS_BUCK_VOLTAGE_NUM,
			.linear_ranges = bd718xx_dvs_buck_volts,
			.n_linear_ranges = ARRAY_SIZE(bd718xx_dvs_buck_volts),
			.vsel_reg = BD718XX_REG_BUCK1_VOLT_RUN,
			.vsel_mask = DVS_BUCK_RUN_MASK,
			.enable_reg = BD718XX_REG_BUCK1_CTRL,
			.enable_mask = BD718XX_BUCK_EN,
			.enable_time = BD71837_BUCK1_STARTUP_TIME,
			.ramp_delay_table = bd718xx_ramp_delay,
			.n_ramp_values = ARRAY_SIZE(bd718xx_ramp_delay),
			.ramp_reg = BD718XX_REG_BUCK1_CTRL,
			.ramp_mask = BUCK_RAMPRATE_MASK,
			.owner = THIS_MODULE,
			.of_parse_cb = buck_set_hw_dvs_levels,
		},
		.dvs = {
			.level_map = ROHM_DVS_LEVEL_RUN | ROHM_DVS_LEVEL_IDLE |
				     ROHM_DVS_LEVEL_SUSPEND,
			.run_reg = BD718XX_REG_BUCK1_VOLT_RUN,
			.run_mask = DVS_BUCK_RUN_MASK,
			.idle_reg = BD718XX_REG_BUCK1_VOLT_IDLE,
			.idle_mask = DVS_BUCK_RUN_MASK,
			.suspend_reg = BD718XX_REG_BUCK1_VOLT_SUSP,
			.suspend_mask = DVS_BUCK_RUN_MASK,
		},
		.init = {
			.reg = BD718XX_REG_BUCK1_CTRL,
			.mask = BD718XX_BUCK_SEL,
			.val = BD718XX_BUCK_SEL,
		},
	},
	{
		.desc = {
			.name = "buck2",
			.of_match = of_match_ptr("BUCK2"),
			.regulators_node = of_match_ptr("regulators"),
			.id = BD718XX_BUCK2,
			.type = REGULATOR_VOLTAGE,
			.n_voltages = BD718XX_DVS_BUCK_VOLTAGE_NUM,
			.linear_ranges = bd718xx_dvs_buck_volts,
			.n_linear_ranges = ARRAY_SIZE(bd718xx_dvs_buck_volts),
			.vsel_reg = BD718XX_REG_BUCK2_VOLT_RUN,
			.vsel_mask = DVS_BUCK_RUN_MASK,
			.enable_reg = BD718XX_REG_BUCK2_CTRL,
			.enable_mask = BD718XX_BUCK_EN,
			.enable_time = BD71837_BUCK2_STARTUP_TIME,
			.ramp_delay_table = bd718xx_ramp_delay,
			.n_ramp_values = ARRAY_SIZE(bd718xx_ramp_delay),
			.ramp_reg = BD718XX_REG_BUCK2_CTRL,
			.ramp_mask = BUCK_RAMPRATE_MASK,
			.owner = THIS_MODULE,
			.of_parse_cb = buck_set_hw_dvs_levels,
		},
		.dvs = {
			.level_map = ROHM_DVS_LEVEL_RUN | ROHM_DVS_LEVEL_IDLE,
			.run_reg = BD718XX_REG_BUCK2_VOLT_RUN,
			.run_mask = DVS_BUCK_RUN_MASK,
			.idle_reg = BD718XX_REG_BUCK2_VOLT_IDLE,
			.idle_mask = DVS_BUCK_RUN_MASK,
		},
		.init = {
			.reg = BD718XX_REG_BUCK2_CTRL,
			.mask = BD718XX_BUCK_SEL,
			.val = BD718XX_BUCK_SEL,
		},
	},
	{
		.desc = {
			.name = "buck3",
			.of_match = of_match_ptr("BUCK3"),
			.regulators_node = of_match_ptr("regulators"),
			.id = BD718XX_BUCK3,
			.type = REGULATOR_VOLTAGE,
			.n_voltages = BD718XX_DVS_BUCK_VOLTAGE_NUM,
			.linear_ranges = bd718xx_dvs_buck_volts,
			.n_linear_ranges = ARRAY_SIZE(bd718xx_dvs_buck_volts),
			.vsel_reg = BD71837_REG_BUCK3_VOLT_RUN,
			.vsel_mask = DVS_BUCK_RUN_MASK,
			.enable_reg = BD71837_REG_BUCK3_CTRL,
			.enable_mask = BD718XX_BUCK_EN,
			.enable_time = BD71837_BUCK3_STARTUP_TIME,
			.ramp_delay_table = bd718xx_ramp_delay,
			.n_ramp_values = ARRAY_SIZE(bd718xx_ramp_delay),
			.ramp_reg = BD71837_REG_BUCK3_CTRL,
			.ramp_mask = BUCK_RAMPRATE_MASK,
			.owner = THIS_MODULE,
			.of_parse_cb = buck_set_hw_dvs_levels,
		},
		.dvs = {
			.level_map = ROHM_DVS_LEVEL_RUN,
			.run_reg = BD71837_REG_BUCK3_VOLT_RUN,
			.run_mask = DVS_BUCK_RUN_MASK,
		},
		.init = {
			.reg = BD71837_REG_BUCK3_CTRL,
			.mask = BD718XX_BUCK_SEL,
			.val = BD718XX_BUCK_SEL,
		},
	},
	{
		.desc = {
			.name = "buck4",
			.of_match = of_match_ptr("BUCK4"),
			.regulators_node = of_match_ptr("regulators"),
			.id = BD718XX_BUCK4,
			.type = REGULATOR_VOLTAGE,
			.n_voltages = BD718XX_DVS_BUCK_VOLTAGE_NUM,
			.linear_ranges = bd718xx_dvs_buck_volts,
			.n_linear_ranges = ARRAY_SIZE(bd718xx_dvs_buck_volts),
			.vsel_reg = BD71837_REG_BUCK4_VOLT_RUN,
			.vsel_mask = DVS_BUCK_RUN_MASK,
			.enable_reg = BD71837_REG_BUCK4_CTRL,
			.enable_mask = BD718XX_BUCK_EN,
			.enable_time = BD71837_BUCK4_STARTUP_TIME,
			.ramp_delay_table = bd718xx_ramp_delay,
			.n_ramp_values = ARRAY_SIZE(bd718xx_ramp_delay),
			.ramp_reg = BD71837_REG_BUCK4_CTRL,
			.ramp_mask = BUCK_RAMPRATE_MASK,
			.owner = THIS_MODULE,
			.of_parse_cb = buck_set_hw_dvs_levels,
		},
		.dvs = {
			.level_map = ROHM_DVS_LEVEL_RUN,
			.run_reg = BD71837_REG_BUCK4_VOLT_RUN,
			.run_mask = DVS_BUCK_RUN_MASK,
		},
		.init = {
			.reg = BD71837_REG_BUCK4_CTRL,
			.mask = BD718XX_BUCK_SEL,
			.val = BD718XX_BUCK_SEL,
		},
	},
	{
		.desc = {
			.name = "buck5",
			.of_match = of_match_ptr("BUCK5"),
			.regulators_node = of_match_ptr("regulators"),
			.id = BD718XX_BUCK5,
			.type = REGULATOR_VOLTAGE,
			.n_voltages = BD71837_BUCK5_VOLTAGE_NUM,
			.linear_ranges = bd71837_buck5_volts,
			.n_linear_ranges =
				ARRAY_SIZE(bd71837_buck5_volts),
			.vsel_reg = BD718XX_REG_1ST_NODVS_BUCK_VOLT,
			.vsel_mask = BD71837_BUCK5_MASK,
			.vsel_range_reg = BD718XX_REG_1ST_NODVS_BUCK_VOLT,
			.vsel_range_mask = BD71837_BUCK5_RANGE_MASK,
			.linear_range_selectors = bd71837_buck5_volt_range_sel,
			.enable_reg = BD718XX_REG_1ST_NODVS_BUCK_CTRL,
			.enable_mask = BD718XX_BUCK_EN,
			.enable_time = BD71837_BUCK5_STARTUP_TIME,
			.owner = THIS_MODULE,
		},
		.init = {
			.reg = BD718XX_REG_1ST_NODVS_BUCK_CTRL,
			.mask = BD718XX_BUCK_SEL,
			.val = BD718XX_BUCK_SEL,
		},
	},
	{
		.desc = {
			.name = "buck6",
			.of_match = of_match_ptr("BUCK6"),
			.regulators_node = of_match_ptr("regulators"),
			.id = BD718XX_BUCK6,
			.type = REGULATOR_VOLTAGE,
			.n_voltages = BD71837_BUCK6_VOLTAGE_NUM,
			.linear_ranges = bd71837_buck6_volts,
			.n_linear_ranges =
				ARRAY_SIZE(bd71837_buck6_volts),
			.vsel_reg = BD718XX_REG_2ND_NODVS_BUCK_VOLT,
			.vsel_mask = BD71837_BUCK6_MASK,
			.enable_reg = BD718XX_REG_2ND_NODVS_BUCK_CTRL,
			.enable_mask = BD718XX_BUCK_EN,
			.enable_time = BD71837_BUCK6_STARTUP_TIME,
			.owner = THIS_MODULE,
		},
		.init = {
			.reg = BD718XX_REG_2ND_NODVS_BUCK_CTRL,
			.mask = BD718XX_BUCK_SEL,
			.val = BD718XX_BUCK_SEL,
		},
	},
	{
		.desc = {
			.name = "buck7",
			.of_match = of_match_ptr("BUCK7"),
			.regulators_node = of_match_ptr("regulators"),
			.id = BD718XX_BUCK7,
			.type = REGULATOR_VOLTAGE,
			.volt_table = &bd718xx_3rd_nodvs_buck_volts[0],
			.n_voltages = ARRAY_SIZE(bd718xx_3rd_nodvs_buck_volts),
			.vsel_reg = BD718XX_REG_3RD_NODVS_BUCK_VOLT,
			.vsel_mask = BD718XX_3RD_NODVS_BUCK_MASK,
			.enable_reg = BD718XX_REG_3RD_NODVS_BUCK_CTRL,
			.enable_mask = BD718XX_BUCK_EN,
			.enable_time = BD71837_BUCK7_STARTUP_TIME,
			.owner = THIS_MODULE,
		},
		.init = {
			.reg = BD718XX_REG_3RD_NODVS_BUCK_CTRL,
			.mask = BD718XX_BUCK_SEL,
			.val = BD718XX_BUCK_SEL,
		},
	},
	{
		.desc = {
			.name = "buck8",
			.of_match = of_match_ptr("BUCK8"),
			.regulators_node = of_match_ptr("regulators"),
			.id = BD718XX_BUCK8,
			.type = REGULATOR_VOLTAGE,
			.n_voltages = BD718XX_4TH_NODVS_BUCK_VOLTAGE_NUM,
			.linear_ranges = bd718xx_4th_nodvs_buck_volts,
			.n_linear_ranges =
				ARRAY_SIZE(bd718xx_4th_nodvs_buck_volts),
			.vsel_reg = BD718XX_REG_4TH_NODVS_BUCK_VOLT,
			.vsel_mask = BD718XX_4TH_NODVS_BUCK_MASK,
			.enable_reg = BD718XX_REG_4TH_NODVS_BUCK_CTRL,
			.enable_mask = BD718XX_BUCK_EN,
			.enable_time = BD71837_BUCK8_STARTUP_TIME,
			.owner = THIS_MODULE,
		},
		.init = {
			.reg = BD718XX_REG_4TH_NODVS_BUCK_CTRL,
			.mask = BD718XX_BUCK_SEL,
			.val = BD718XX_BUCK_SEL,
		},
	},
	{
		.desc = {
			.name = "ldo1",
			.of_match = of_match_ptr("LDO1"),
			.regulators_node = of_match_ptr("regulators"),
			.id = BD718XX_LDO1,
			.type = REGULATOR_VOLTAGE,
			.n_voltages = BD718XX_LDO1_VOLTAGE_NUM,
			.linear_ranges = bd718xx_ldo1_volts,
			.n_linear_ranges = ARRAY_SIZE(bd718xx_ldo1_volts),
			.vsel_reg = BD718XX_REG_LDO1_VOLT,
			.vsel_mask = BD718XX_LDO1_MASK,
			.vsel_range_reg = BD718XX_REG_LDO1_VOLT,
			.vsel_range_mask = BD718XX_LDO1_RANGE_MASK,
			.linear_range_selectors = bd718xx_ldo1_volt_range_sel,
			.enable_reg = BD718XX_REG_LDO1_VOLT,
			.enable_mask = BD718XX_LDO_EN,
			.enable_time = BD71837_LDO1_STARTUP_TIME,
			.owner = THIS_MODULE,
		},
		.init = {
			.reg = BD718XX_REG_LDO1_VOLT,
			.mask = BD718XX_LDO_SEL,
			.val = BD718XX_LDO_SEL,
		},
	},
	{
		.desc = {
			.name = "ldo2",
			.of_match = of_match_ptr("LDO2"),
			.regulators_node = of_match_ptr("regulators"),
			.id = BD718XX_LDO2,
			.type = REGULATOR_VOLTAGE,
			.volt_table = &ldo_2_volts[0],
			.vsel_reg = BD718XX_REG_LDO2_VOLT,
			.vsel_mask = BD718XX_LDO2_MASK,
			.n_voltages = ARRAY_SIZE(ldo_2_volts),
			.enable_reg = BD718XX_REG_LDO2_VOLT,
			.enable_mask = BD718XX_LDO_EN,
			.enable_time = BD71837_LDO2_STARTUP_TIME,
			.owner = THIS_MODULE,
		},
		.init = {
			.reg = BD718XX_REG_LDO2_VOLT,
			.mask = BD718XX_LDO_SEL,
			.val = BD718XX_LDO_SEL,
		},
	},
	{
		.desc = {
			.name = "ldo3",
			.of_match = of_match_ptr("LDO3"),
			.regulators_node = of_match_ptr("regulators"),
			.id = BD718XX_LDO3,
			.type = REGULATOR_VOLTAGE,
			.n_voltages = BD718XX_LDO3_VOLTAGE_NUM,
			.linear_ranges = bd718xx_ldo3_volts,
			.n_linear_ranges = ARRAY_SIZE(bd718xx_ldo3_volts),
			.vsel_reg = BD718XX_REG_LDO3_VOLT,
			.vsel_mask = BD718XX_LDO3_MASK,
			.enable_reg = BD718XX_REG_LDO3_VOLT,
			.enable_mask = BD718XX_LDO_EN,
			.enable_time = BD71837_LDO3_STARTUP_TIME,
			.owner = THIS_MODULE,
		},
		.init = {
			.reg = BD718XX_REG_LDO3_VOLT,
			.mask = BD718XX_LDO_SEL,
			.val = BD718XX_LDO_SEL,
		},
	},
	{
		.desc = {
			.name = "ldo4",
			.of_match = of_match_ptr("LDO4"),
			.regulators_node = of_match_ptr("regulators"),
			.id = BD718XX_LDO4,
			.type = REGULATOR_VOLTAGE,
			.n_voltages = BD718XX_LDO4_VOLTAGE_NUM,
			.linear_ranges = bd718xx_ldo4_volts,
			.n_linear_ranges = ARRAY_SIZE(bd718xx_ldo4_volts),
			.vsel_reg = BD718XX_REG_LDO4_VOLT,
			.vsel_mask = BD718XX_LDO4_MASK,
			.enable_reg = BD718XX_REG_LDO4_VOLT,
			.enable_mask = BD718XX_LDO_EN,
			.enable_time = BD71837_LDO4_STARTUP_TIME,
			.owner = THIS_MODULE,
		},
		.init = {
			.reg = BD718XX_REG_LDO4_VOLT,
			.mask = BD718XX_LDO_SEL,
			.val = BD718XX_LDO_SEL,
		},
	},
	{
		.desc = {
			.name = "ldo5",
			.of_match = of_match_ptr("LDO5"),
			.regulators_node = of_match_ptr("regulators"),
			.id = BD718XX_LDO5,
			.type = REGULATOR_VOLTAGE,
			.n_voltages = BD71837_LDO5_VOLTAGE_NUM,
			.linear_ranges = bd71837_ldo5_volts,
			.n_linear_ranges = ARRAY_SIZE(bd71837_ldo5_volts),
			/* LDO5 is supplied by buck6 */
			.supply_name = "buck6",
			.vsel_reg = BD718XX_REG_LDO5_VOLT,
			.vsel_mask = BD71837_LDO5_MASK,
			.enable_reg = BD718XX_REG_LDO5_VOLT,
			.enable_mask = BD718XX_LDO_EN,
			.enable_time = BD71837_LDO5_STARTUP_TIME,
			.owner = THIS_MODULE,
		},
		.init = {
			.reg = BD718XX_REG_LDO5_VOLT,
			.mask = BD718XX_LDO_SEL,
			.val = BD718XX_LDO_SEL,
		},
		.additional_inits = bd71837_ldo5_inits,
		.additional_init_amnt = ARRAY_SIZE(bd71837_ldo5_inits),
	},
	{
		.desc = {
			.name = "ldo6",
			.of_match = of_match_ptr("LDO6"),
			.regulators_node = of_match_ptr("regulators"),
			.id = BD718XX_LDO6,
			.type = REGULATOR_VOLTAGE,
			.n_voltages = BD718XX_LDO6_VOLTAGE_NUM,
			.linear_ranges = bd718xx_ldo6_volts,
			.n_linear_ranges = ARRAY_SIZE(bd718xx_ldo6_volts),
			/* LDO6 is supplied by buck7 */
			.supply_name = "buck7",
			.vsel_reg = BD718XX_REG_LDO6_VOLT,
			.vsel_mask = BD718XX_LDO6_MASK,
			.enable_reg = BD718XX_REG_LDO6_VOLT,
			.enable_mask = BD718XX_LDO_EN,
			.enable_time = BD71837_LDO6_STARTUP_TIME,
			.owner = THIS_MODULE,
		},
		.init = {
			.reg = BD718XX_REG_LDO6_VOLT,
			.mask = BD718XX_LDO_SEL,
			.val = BD718XX_LDO_SEL,
		},
		.additional_inits = bd71837_ldo6_inits,
		.additional_init_amnt = ARRAY_SIZE(bd71837_ldo6_inits),
	},
	{
		.desc = {
			.name = "ldo7",
			.of_match = of_match_ptr("LDO7"),
			.regulators_node = of_match_ptr("regulators"),
			.id = BD718XX_LDO7,
			.type = REGULATOR_VOLTAGE,
			.n_voltages = BD71837_LDO7_VOLTAGE_NUM,
			.linear_ranges = bd71837_ldo7_volts,
			.n_linear_ranges = ARRAY_SIZE(bd71837_ldo7_volts),
			.vsel_reg = BD71837_REG_LDO7_VOLT,
			.vsel_mask = BD71837_LDO7_MASK,
			.enable_reg = BD71837_REG_LDO7_VOLT,
			.enable_mask = BD718XX_LDO_EN,
			.enable_time = BD71837_LDO7_STARTUP_TIME,
			.owner = THIS_MODULE,
		},
		.init = {
			.reg = BD71837_REG_LDO7_VOLT,
			.mask = BD718XX_LDO_SEL,
			.val = BD718XX_LDO_SEL,
		},
	},
};

static void mark_hw_controlled(struct device *dev, struct device_node *np,
			       struct bd718xx_regulator_data *reg_data,
			       unsigned int num_reg_data, int *info)
{
	int i;

	for (i = 1; i <= num_reg_data; i++) {
		if (!of_node_name_eq(np, reg_data[i-1].desc.of_match))
			continue;

		*info |= 1 << (i - 1);
		dev_dbg(dev, "regulator %d runlevel controlled\n", i);
		return;
	}
	dev_warn(dev, "Bad regulator node\n");
}

/*
 * Setups where regulator (especially the buck8) output voltage is scaled
 * by adding external connection where some other regulator output is connected
 * to feedback-pin (over suitable resistors) is getting popular amongst users
 * of BD71837. (This allows for example scaling down the buck8 voltages to suit
 * lover GPU voltages for projects where buck8 is (ab)used to supply power
 * for GPU. Additionally some setups do allow DVS for buck8 but as this do
 * produce voltage spikes the HW must be evaluated to be able to survive this
 * - hence I keep the DVS disabled for non DVS bucks by default. I don't want
 * to help you burn your proto board)
 *
 * So we allow describing this external connection from DT and scale the
 * voltages accordingly. This is what the connection should look like:
 *
 * |------------|
 * |	buck 8  |-------+----->Vout
 * |		|	|
 * |------------|	|
 *	| FB pin	|
 *	|		|
 *	+-------+--R2---+
 *		|
 *		R1
 *		|
 *	V FB-pull-up
 *
 *	Here the buck output is sifted according to formula:
 *
 * Vout_o = Vo - (Vpu - Vo)*R2/R1
 * Linear_step = step_orig*(R1+R2)/R1
 *
 * where:
 * Vout_o is adjusted voltage output at vsel reg value 0
 * Vo is original voltage output at vsel reg value 0
 * Vpu is the pull-up voltage V FB-pull-up in the picture
 * R1 and R2 are resistor values.
 *
 * As a real world example for buck8 and a specific GPU:
 * VLDO = 1.6V (used as FB-pull-up)
 * R1 = 1000ohms
 * R2 = 150ohms
 * VSEL 0x0 => 0.8V – (VLDO – 0.8) * R2 / R1 = 0.68V
 * Linear Step = 10mV * (R1 + R2) / R1 = 11.5mV
 */
static int setup_feedback_loop(struct device *dev, struct device_node *np,
			       struct bd718xx_regulator_data *reg_data,
			       unsigned int num_reg_data, int fb_uv)
{
	int i, r1, r2, ret;

	/*
	 * We do adjust the values in the global desc based on DT settings.
	 * This may not be best approach as it can cause problems if more than
	 * one PMIC is controlled from same processor. I don't see such use-case
	 * for BD718x7 now - so we spare some bits.
	 *
	 * If this will point out to be a problem - then we can allocate new
	 * bd718xx_regulator_data array at probe and just use the global
	 * array as a template where we copy initial values. Then we can
	 * use allocated descs for regultor registration and do IC specific
	 * modifications to this copy while leaving other PMICs untouched. But
	 * that means allocating new array for each PMIC - and currently I see
	 * no need for that.
	 */

	for (i = 0; i < num_reg_data; i++) {
		struct regulator_desc *desc = &reg_data[i].desc;
		int j;

		if (!of_node_name_eq(np, desc->of_match))
			continue;

		pr_info("Looking at node '%s'\n", desc->of_match);

		/* The feedback loop connection does not make sense for LDOs */
		if (desc->id >= BD718XX_LDO1)
			return -EINVAL;

		ret = of_property_read_u32(np, "rohm,feedback-pull-up-r1-ohms",
					   &r1);
		if (ret)
			return ret;

		if (!r1)
			return -EINVAL;

		ret = of_property_read_u32(np, "rohm,feedback-pull-up-r2-ohms",
					   &r2);
		if (ret)
			return ret;

		if (desc->n_linear_ranges && desc->linear_ranges) {
			struct linear_range *new;

			new = devm_kzalloc(dev, desc->n_linear_ranges *
					   sizeof(struct linear_range),
					   GFP_KERNEL);
			if (!new)
				return -ENOMEM;

			for (j = 0; j < desc->n_linear_ranges; j++) {
				int min = desc->linear_ranges[j].min;
				int step = desc->linear_ranges[j].step;

				min -= (fb_uv - min)*r2/r1;
				step = step * (r1 + r2);
				step /= r1;

				new[j].min = min;
				new[j].step = step;

				dev_dbg(dev, "%s: old range min %d, step %d\n",
					desc->name, desc->linear_ranges[j].min,
					desc->linear_ranges[j].step);
				dev_dbg(dev, "new range min %d, step %d\n", min,
					step);
			}
			desc->linear_ranges = new;
		}
		dev_dbg(dev, "regulator '%s' has FB pull-up configured\n",
			desc->name);

		return 0;
	}

	return -ENODEV;
}

static int get_special_regulators(struct device *dev,
				  struct bd718xx_regulator_data *reg_data,
				  unsigned int num_reg_data, int *info)
{
	int ret;
	struct device_node *np;
	struct device_node *nproot = dev->of_node;
	int uv;

	*info = 0;

	nproot = of_get_child_by_name(nproot, "regulators");
	if (!nproot) {
		dev_err(dev, "failed to find regulators node\n");
		return -ENODEV;
	}
	for_each_child_of_node(nproot, np) {
		if (of_property_read_bool(np, "rohm,no-regulator-enable-control"))
			mark_hw_controlled(dev, np, reg_data, num_reg_data,
					   info);
		ret = of_property_read_u32(np, "rohm,fb-pull-up-microvolt",
					   &uv);
		if (ret) {
			if (ret == -EINVAL)
				continue;
			else
				goto err_out;
		}

		ret = setup_feedback_loop(dev, np, reg_data, num_reg_data, uv);
		if (ret)
			goto err_out;
	}

	of_node_put(nproot);
	return 0;

err_out:
	of_node_put(np);
	of_node_put(nproot);

	return ret;
}

static int bd718xx_probe(struct platform_device *pdev)
{
	struct regmap *regmap;
	struct regulator_config config = { 0 };
	int i, j, err, omit_enable;
	bool use_snvs;
	struct bd718xx_regulator_data *reg_data;
	unsigned int num_reg_data;
	enum rohm_chip_type chip = platform_get_device_id(pdev)->driver_data;
	const struct regulator_ops **swops, **hwops;

	regmap = dev_get_regmap(pdev->dev.parent, NULL);
	if (!regmap) {
		dev_err(&pdev->dev, "No MFD driver data\n");
		return -EINVAL;
	}

	switch (chip) {
	case ROHM_CHIP_TYPE_BD71837:
		reg_data = bd71837_regulators;
		num_reg_data = ARRAY_SIZE(bd71837_regulators);
		swops = &bd71837_swcontrol_ops[0];
		hwops = &bd71837_hwcontrol_ops[0];
		break;
	case ROHM_CHIP_TYPE_BD71847:
		reg_data = bd71847_regulators;
		num_reg_data = ARRAY_SIZE(bd71847_regulators);
		swops = &bd71847_swcontrol_ops[0];
		hwops = &bd71847_hwcontrol_ops[0];
		break;
	default:
		dev_err(&pdev->dev, "Unsupported chip type\n");
		err = -EINVAL;
		goto err;
	}

	/* Register LOCK release */
	err = regmap_update_bits(regmap, BD718XX_REG_REGLOCK,
				 (REGLOCK_PWRSEQ | REGLOCK_VREG), 0);
	if (err) {
		dev_err(&pdev->dev, "Failed to unlock PMIC (%d)\n", err);
		goto err;
	} else {
		dev_dbg(&pdev->dev, "Unlocked lock register 0x%x\n",
			BD718XX_REG_REGLOCK);
	}

	use_snvs = of_property_read_bool(pdev->dev.parent->of_node,
					 "rohm,reset-snvs-powered");

	/*
	 * Change the next stage from poweroff to be READY instead of SNVS
	 * for all reset types because OTP loading at READY will clear SEL
	 * bit allowing HW defaults for power rails to be used
	 */
	if (!use_snvs) {
		err = regmap_update_bits(regmap, BD718XX_REG_TRANS_COND1,
					 BD718XX_ON_REQ_POWEROFF_MASK |
					 BD718XX_SWRESET_POWEROFF_MASK |
					 BD718XX_WDOG_POWEROFF_MASK |
					 BD718XX_KEY_L_POWEROFF_MASK,
					 BD718XX_POWOFF_TO_RDY);
		if (err) {
			dev_err(&pdev->dev, "Failed to change reset target\n");
			goto err;
		} else {
			dev_dbg(&pdev->dev,
				"Changed all resets from SVNS to READY\n");
		}
	}

	config.dev = pdev->dev.parent;
	config.regmap = regmap;
	/*
	 * There are cases when we want to leave the enable-control for
	 * the HW state machine and use this driver only for voltage control.
	 * One special case is when we use PMIC_STBY_REQ line from SoC to PMIC
	 * in order to set the system to SUSPEND state.
	 *
	 * If regulator is taken under SW control the regulator state will not
	 * be affected by PMIC state machine - Eg. regulator is likely to stay
	 * on even in SUSPEND
	 */
	err = get_special_regulators(pdev->dev.parent, reg_data, num_reg_data,
				     &omit_enable);
	if (err)
		return err;

	for (i = 0; i < num_reg_data; i++) {

		struct regulator_desc *desc;
		struct regulator_dev *rdev;
		struct bd718xx_regulator_data *r;
		int no_enable_control = omit_enable & (1 << i);

		r = &reg_data[i];
		desc = &r->desc;

		if (no_enable_control)
			desc->ops = hwops[i];
		else
			desc->ops = swops[i];

		rdev = devm_regulator_register(&pdev->dev, desc, &config);
		if (IS_ERR(rdev)) {
			dev_err(&pdev->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
		 *
		 * At poweroff transition PMIC HW disables EN bit for
		 * regulators but leaves SEL bit untouched. So if state
		 * transition from POWEROFF is done to SNVS - then all power
		 * rails controlled by SW (having SEL bit set) stay disabled
		 * as EN is cleared. This will result boot failure if any
		 * crucial systems are powered by these rails. We don't
		 * enable SW control for crucial regulators if snvs state is
		 * used
		 */
		if (!no_enable_control && (!use_snvs ||
		    !rdev->constraints->always_on ||
		    !rdev->constraints->boot_on)) {
			err = regmap_update_bits(regmap, r->init.reg,
						 r->init.mask, r->init.val);
			if (err) {
				dev_err(&pdev->dev,
					"Failed to take control for (%s)\n",
					desc->name);
				goto err;
			}
		}
		for (j = 0; j < r->additional_init_amnt; j++) {
			err = regmap_update_bits(regmap,
						 r->additional_inits[j].reg,
						 r->additional_inits[j].mask,
						 r->additional_inits[j].val);
			if (err) {
				dev_err(&pdev->dev,
					"Buck (%s) initialization failed\n",
					desc->name);
				goto err;
			}
		}
	}

err:
	return err;
}

static const struct platform_device_id bd718x7_pmic_id[] = {
	{ "bd71837-pmic", ROHM_CHIP_TYPE_BD71837 },
	{ "bd71847-pmic", ROHM_CHIP_TYPE_BD71847 },
	{ },
};
MODULE_DEVICE_TABLE(platform, bd718x7_pmic_id);

static struct platform_driver bd718xx_regulator = {
	.driver = {
		.name = "bd718xx-pmic",
	},
	.probe = bd718xx_probe,
	.id_table = bd718x7_pmic_id,
};

module_platform_driver(bd718xx_regulator);

MODULE_AUTHOR("Matti Vaittinen <matti.vaittinen@fi.rohmeurope.com>");
MODULE_DESCRIPTION("BD71837/BD71847 voltage regulator driver");
MODULE_LICENSE("GPL");
MODULE_ALIAS("platform:bd718xx-pmic");