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

#include <linux/cleanup.h>
#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, \
                   _set_uvp, _set_ovp)                          \
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),                    \
        .set_under_voltage_protection = (_set_uvp),             \
        .set_over_voltage_protection = (_set_ovp),              \
};                                                              \
                                                                \
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),                    \
        .set_under_voltage_protection = (_set_uvp),             \
        .set_over_voltage_protection = (_set_ovp),              \
}                                                               \

/*
 * 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);
}

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

        if (*mask) {
                /*
                 * We had fault detection disabled for the duration of the
                 * voltage change.
                 *
                 * 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.
                 */
                msleep(1);

                ret = regmap_clear_bits(rdev->regmap, BD718XX_REG_MVRFLTMASK2,
                                         *mask);
                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.
                 */
                if (new > now) {
                        int tmp;
                        int prot_bit;
                        int ldo_offset = rdev->desc->id - BD718XX_LDO1;

                        prot_bit = BD718XX_LDO1_VRMON80 << ldo_offset;
                        ret = regmap_read(rdev->regmap, BD718XX_REG_MVRFLTMASK2,
                                          &tmp);
                        if (ret) {
                                dev_err(&rdev->dev,
                                        "Failed to read voltage monitoring state\n");
                                return ret;
                        }

                        if (!(tmp & prot_bit)) {
                                /* We disable protection if it was enabled... */
                                ret = regmap_set_bits(rdev->regmap,
                                                      BD718XX_REG_MVRFLTMASK2,
                                                      prot_bit);
                                /* ...and we also want to re-enable it */
                                *mask = prot_bit;
                        }
                        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);
}

/*
 * 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, 0x1, 0x1, 0x1
};

/*
 * 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, 0x1, 0x2, 0x2, 0x2
};

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, 0x1 };

/*
 * 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, 0x1 };

/*
 * 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, 0x1 };

/*
 * 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;
};

static int bd718x7_xvp_sanity_check(struct regulator_dev *rdev, int lim_uV,
                                    int severity)
{
        /*
         * BD71837/47/50 ... (ICs supported by this driver) do not provide
         * warnings, only protection
         */
        if (severity != REGULATOR_SEVERITY_PROT) {
                dev_err(&rdev->dev,
                        "Unsupported Under Voltage protection level\n");
                return -EINVAL;
        }

        /*
         * And protection limit is not changeable. It can only be enabled
         * or disabled
         */
        if (lim_uV)
                return -EINVAL;

        return 0;
}

static int bd718x7_set_ldo_uvp(struct regulator_dev *rdev, int lim_uV,
                               int severity, bool enable)
{
        int ldo_offset = rdev->desc->id - BD718XX_LDO1;
        int prot_bit, ret;

        ret = bd718x7_xvp_sanity_check(rdev, lim_uV, severity);
        if (ret)
                return ret;

        prot_bit = BD718XX_LDO1_VRMON80 << ldo_offset;

        if (enable)
                return regmap_clear_bits(rdev->regmap, BD718XX_REG_MVRFLTMASK2,
                                         prot_bit);

        return regmap_set_bits(rdev->regmap, BD718XX_REG_MVRFLTMASK2,
                               prot_bit);
}

static int bd718x7_get_buck_prot_reg(int id, int *reg)
{

        if (id > BD718XX_BUCK8) {
                WARN_ON(id > BD718XX_BUCK8);
                return -EINVAL;
        }

        if (id > BD718XX_BUCK4)
                *reg = BD718XX_REG_MVRFLTMASK0;
        else
                *reg = BD718XX_REG_MVRFLTMASK1;

        return 0;
}

static int bd718x7_get_buck_ovp_info(int id, int *reg, int *bit)
{
        int ret;

        ret = bd718x7_get_buck_prot_reg(id, reg);
        if (ret)
                return ret;

        *bit = BIT((id % 4) * 2 + 1);

        return 0;
}

static int bd718x7_get_buck_uvp_info(int id, int *reg, int *bit)
{
        int ret;

        ret = bd718x7_get_buck_prot_reg(id, reg);
        if (ret)
                return ret;

        *bit = BIT((id % 4) * 2);

        return 0;
}

static int bd718x7_set_buck_uvp(struct regulator_dev *rdev, int lim_uV,
                                int severity, bool enable)
{
        int bit, reg, ret;

        ret = bd718x7_xvp_sanity_check(rdev, lim_uV, severity);
        if (ret)
                return ret;

        ret = bd718x7_get_buck_uvp_info(rdev->desc->id, &reg, &bit);
        if (ret)
                return ret;

        if (enable)
                return regmap_clear_bits(rdev->regmap, reg, bit);

        return regmap_set_bits(rdev->regmap, reg, bit);

}

static int bd718x7_set_buck_ovp(struct regulator_dev *rdev, int lim_uV,
                                int severity,
                                bool enable)
{
        int bit, reg, ret;

        ret = bd718x7_xvp_sanity_check(rdev, lim_uV, severity);
        if (ret)
                return ret;

        ret = bd718x7_get_buck_ovp_info(rdev->desc->id, &reg, &bit);
        if (ret)
                return ret;

        if (enable)
                return regmap_clear_bits(rdev->regmap, reg, bit);

        return regmap_set_bits(rdev->regmap, reg, bit);
}

/*
 * 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,
            bd718x7_set_ldo_uvp, 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,
        .set_under_voltage_protection = bd718x7_set_ldo_uvp,
};

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, bd718x7_set_buck_uvp,
            bd718x7_set_buck_ovp);

BD718XX_OPS(bd718xx_ldo_regulator_ops, regulator_list_voltage_linear_range,
            NULL, bd718xx_set_voltage_sel_restricted,
            regulator_get_voltage_sel_regmap, NULL, NULL, bd718x7_set_ldo_uvp,
            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, bd718x7_set_ldo_uvp,
            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, bd718x7_set_buck_uvp, bd718x7_set_buck_ovp);

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, bd718x7_set_buck_uvp, bd718x7_set_buck_ovp);

/*
 * 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,
            bd718x7_set_ldo_uvp, 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, bd718x7_set_buck_uvp,
            bd718x7_set_buck_ovp);

BD718XX_OPS(bd71837_ldo_regulator_ops, regulator_list_voltage_linear_range,
            NULL, rohm_regulator_set_voltage_sel_restricted,
            regulator_get_voltage_sel_regmap, NULL, NULL, bd718x7_set_ldo_uvp,
            NULL);

BD718XX_OPS(bd71837_ldo_regulator_nolinear_ops, regulator_list_voltage_table,
            NULL, rohm_regulator_set_voltage_sel_restricted,
            regulator_get_voltage_sel_regmap, NULL, NULL, bd718x7_set_ldo_uvp,
            NULL);

BD718XX_OPS(bd71837_buck_regulator_ops, regulator_list_voltage_linear_range,
            NULL, rohm_regulator_set_voltage_sel_restricted,
            regulator_get_voltage_sel_regmap, regulator_set_voltage_time_sel,
            NULL, bd718x7_set_buck_uvp, bd718x7_set_buck_ovp);

BD718XX_OPS(bd71837_buck_regulator_nolinear_ops, regulator_list_voltage_table,
            regulator_map_voltage_ascend, rohm_regulator_set_voltage_sel_restricted,
            regulator_get_voltage_sel_regmap, regulator_set_voltage_time_sel,
            NULL, bd718x7_set_buck_uvp, bd718x7_set_buck_ovp);
/*
 * 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,
        .set_under_voltage_protection = bd718x7_set_buck_uvp,
        .set_over_voltage_protection = bd718x7_set_buck_ovp,
};

/*
 * 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,
            regulator_set_ramp_delay_regmap, bd718x7_set_buck_uvp,
            bd718x7_set_buck_ovp);



/*
 * 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)
{
        const struct bd718xx_regulator_data *data;

        data = container_of_const(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_bitfield = 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_bitfield = 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_bitfield = 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_bitfield = 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_bitfield = 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_bitfield = 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;

                /* 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_kcalloc(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].min_sel = desc->linear_ranges[j].min_sel;
                                new[j].max_sel = desc->linear_ranges[j].max_sel;
                                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;
        int uv;

        *info = 0;

        struct device_node *nproot __free(device_node) = of_get_child_by_name(dev->of_node,
                                                                              "regulators");
        if (!nproot) {
                dev_err(dev, "failed to find regulators node\n");
                return -ENODEV;
        }
        for_each_child_of_node_scoped(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
                                return ret;
                }

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

        return 0;
}

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");
                return -EINVAL;
        }

        /* Register LOCK release */
        err = regmap_update_bits(regmap, BD718XX_REG_REGLOCK,
                                 (REGLOCK_PWRSEQ | REGLOCK_VREG), 0);
        if (err)
                return dev_err_probe(&pdev->dev, err, "Failed to unlock PMIC\n");

        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)
                        return dev_err_probe(&pdev->dev, err,
                                             "Failed to change reset target\n");

                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))
                        return dev_err_probe(&pdev->dev, PTR_ERR(rdev),
                                             "failed to register %s regulator\n",
                                             desc->name);

                /*
                 * 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)
                                return dev_err_probe(&pdev->dev, err,
                                        "Failed to take control for (%s)\n",
                                        desc->name);
                }
                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)
                                return dev_err_probe(&pdev->dev, err,
                                        "Buck (%s) initialization failed\n",
                                        desc->name);
                }
        }

        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_type = PROBE_PREFER_ASYNCHRONOUS,
        },
        .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");