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    Subject[PATCH 12/15] regulator: Support ROHM BD71815 regulators
    Support voltage control for regulators on ROHM BD71815 PMIC.

    ROHM BD71815 contains 5 bucks, 7 LDOs and a boost (intended for LED).
    Bucks 1 and 2 support HW state based voltage level and enable states. Other
    regulators support HW state based enable states. All bucks and LDOs 1-5
    allow voltage changes for RUN state and LDO4 can be enabled/disabled via
    GPIO.

    LDO3 does support changing between two predetermined voltages by using
    a GPIO but this functionality is not included in this commit.

    This work is derived from driver originally written by Tony Luo
    <luofc@embedinfo.com> - although not much of original work is left.

    Signed-off-by: Matti Vaittinen <matti.vaittinen@fi.rohmeurope.com>
    ---
    drivers/regulator/Kconfig | 11 +
    drivers/regulator/Makefile | 1 +
    drivers/regulator/bd71815-regulator.c | 675 ++++++++++++++++++++++++++
    3 files changed, 687 insertions(+)
    create mode 100644 drivers/regulator/bd71815-regulator.c

    diff --git a/drivers/regulator/Kconfig b/drivers/regulator/Kconfig
    index 020a00d6696b..b2426f30f9fd 100644
    --- a/drivers/regulator/Kconfig
    +++ b/drivers/regulator/Kconfig
    @@ -196,6 +196,17 @@ config REGULATOR_BD70528
    This driver can also be built as a module. If so, the module
    will be called bd70528-regulator.

    +config REGULATOR_BD71815
    + tristate "ROHM BD71815 Power Regulator"
    + depends on MFD_ROHM_BD71828
    + help
    + This driver supports voltage regulators on ROHM BD71815 PMIC.
    + This will enable support for the software controllable buck
    + and LDO regulators and a current regulator for LEDs.
    +
    + This driver can also be built as a module. If so, the module
    + will be called bd71815-regulator.
    +
    config REGULATOR_BD71828
    tristate "ROHM BD71828 Power Regulator"
    depends on MFD_ROHM_BD71828
    diff --git a/drivers/regulator/Makefile b/drivers/regulator/Makefile
    index 6ebae516258e..6223c73a8000 100644
    --- a/drivers/regulator/Makefile
    +++ b/drivers/regulator/Makefile
    @@ -29,6 +29,7 @@ obj-$(CONFIG_REGULATOR_AS3722) += as3722-regulator.o
    obj-$(CONFIG_REGULATOR_AXP20X) += axp20x-regulator.o
    obj-$(CONFIG_REGULATOR_BCM590XX) += bcm590xx-regulator.o
    obj-$(CONFIG_REGULATOR_BD70528) += bd70528-regulator.o
    +obj-$(CONFIG_REGULATOR_BD71815) += bd71815-regulator.o
    obj-$(CONFIG_REGULATOR_BD71828) += bd71828-regulator.o
    obj-$(CONFIG_REGULATOR_BD718XX) += bd718x7-regulator.o
    obj-$(CONFIG_REGULATOR_BD9571MWV) += bd9571mwv-regulator.o
    diff --git a/drivers/regulator/bd71815-regulator.c b/drivers/regulator/bd71815-regulator.c
    new file mode 100644
    index 000000000000..56d3292361d2
    --- /dev/null
    +++ b/drivers/regulator/bd71815-regulator.c
    @@ -0,0 +1,675 @@
    +// SPDX-License-Identifier: GPL-2.0-only
    +/*
    + * Copyright 2014 Embest Technology Co. Ltd. Inc.
    + * bd71815-regulator.c ROHM BD71815 regulator driver
    + *
    + * Author: Tony Luo <luofc@embedinfo.com>
    + */
    +#include <linux/kernel.h>
    +#include <linux/module.h>
    +#include <linux/init.h>
    +#include <linux/err.h>
    +#include <linux/platform_device.h>
    +#include <linux/regulator/driver.h>
    +#include <linux/regulator/machine.h>
    +#include <linux/delay.h>
    +#include <linux/slab.h>
    +#include <linux/gpio.h>
    +#include <linux/mfd/rohm-generic.h>
    +#include <linux/mfd/rohm-bd71815.h>
    +#include <linux/regulator/of_regulator.h>
    +
    +#define BD71815_STANDBY_OFFSET 0
    +#define BD71815_DVS_BUCK_NUM 2
    +#define BD71815_DVS_HIGH_LOW 2
    +
    +struct bd71815_regulator {
    + struct regulator_desc desc;
    + const struct rohm_dvs_config *dvs;
    +};
    +
    +struct bd71815_pmic {
    + struct bd71815_regulator descs[BD71815_REGULATOR_CNT];
    + struct regmap *regmap;
    + struct device *dev;
    + struct gpio_descs *gps;
    + struct regulator_dev *rdev[BD71815_REGULATOR_CNT];
    +};
    +
    +static const int bd7181x_wled_currents[] = {
    + /* 0x00 */
    + 10, 20, 30, 50,
    + 70, 100, 200, 300,
    + 500, 700, 1000, 2000,
    + 3000, 4000, 5000, 6000,
    + /* 0x10 */
    + 7000, 8000, 9000, 10000,
    + 11000, 12000, 13000, 14000,
    + 15000, 16000, 17000, 18000,
    + 19000, 20000, 21000, 22000,
    + /* 0x20 */
    + 23000, 24000, 25000,
    +};
    +
    +const struct rohm_dvs_config buck1_dvs = {
    + .level_map = ROHM_DVS_LEVEL_RUN | ROHM_DVS_LEVEL_SNVS |
    + ROHM_DVS_LEVEL_SUSPEND | ROHM_DVS_LEVEL_LPSR,
    + .run_reg = BD71815_REG_BUCK1_VOLT_H,
    + .run_mask = BD71815_VOLT_MASK,
    + .run_on_mask = BD71815_BUCK_RUN_ON,
    + .snvs_on_mask = BD71815_BUCK_SNVS_ON,
    + .suspend_reg = BD71815_REG_BUCK1_VOLT_L,
    + .suspend_mask = BD71815_VOLT_MASK,
    + .suspend_on_mask = BD71815_BUCK_SUSP_ON,
    + .lpsr_reg = BD71815_REG_BUCK1_VOLT_L,
    + .lpsr_mask = BD71815_VOLT_MASK,
    + .lpsr_on_mask = BD71815_BUCK_LPSR_ON,
    +};
    +
    +const struct rohm_dvs_config buck2_dvs = {
    + .level_map = ROHM_DVS_LEVEL_RUN | ROHM_DVS_LEVEL_SNVS |
    + ROHM_DVS_LEVEL_SUSPEND | ROHM_DVS_LEVEL_LPSR,
    + .run_reg = BD71815_REG_BUCK2_VOLT_H,
    + .run_mask = BD71815_VOLT_MASK,
    + .run_on_mask = BD71815_BUCK_RUN_ON,
    + .snvs_on_mask = BD71815_BUCK_SNVS_ON,
    + .suspend_reg = BD71815_REG_BUCK2_VOLT_L,
    + .suspend_mask = BD71815_VOLT_MASK,
    + .suspend_on_mask = BD71815_BUCK_SUSP_ON,
    + .lpsr_reg = BD71815_REG_BUCK2_VOLT_L,
    + .lpsr_mask = BD71815_VOLT_MASK,
    + .lpsr_on_mask = BD71815_BUCK_LPSR_ON,
    +};
    +
    +const struct rohm_dvs_config buck3_dvs = {
    + .level_map = ROHM_DVS_LEVEL_RUN | ROHM_DVS_LEVEL_SNVS |
    + ROHM_DVS_LEVEL_SUSPEND | ROHM_DVS_LEVEL_LPSR,
    + .run_reg = BD71815_REG_BUCK3_VOLT,
    + .run_mask = BD71815_VOLT_MASK,
    + .run_on_mask = BD71815_BUCK_RUN_ON,
    + .snvs_on_mask = BD71815_BUCK_SNVS_ON,
    + .suspend_on_mask = BD71815_BUCK_SUSP_ON,
    + .lpsr_on_mask = BD71815_BUCK_LPSR_ON,
    +};
    +
    +const struct rohm_dvs_config buck4_dvs = {
    + .level_map = ROHM_DVS_LEVEL_RUN | ROHM_DVS_LEVEL_SNVS |
    + ROHM_DVS_LEVEL_SUSPEND | ROHM_DVS_LEVEL_LPSR,
    + .run_reg = BD71815_REG_BUCK4_VOLT,
    + .run_mask = BD71815_VOLT_MASK,
    + .run_on_mask = BD71815_BUCK_RUN_ON,
    + .snvs_on_mask = BD71815_BUCK_SNVS_ON,
    + .suspend_on_mask = BD71815_BUCK_SUSP_ON,
    + .lpsr_on_mask = BD71815_BUCK_LPSR_ON,
    +};
    +
    +const struct rohm_dvs_config ldo1_dvs = {
    + .level_map = ROHM_DVS_LEVEL_RUN | ROHM_DVS_LEVEL_SNVS |
    + ROHM_DVS_LEVEL_SUSPEND | ROHM_DVS_LEVEL_LPSR,
    + .run_reg = BD71815_REG_LDO_MODE1,
    + .run_mask = BD71815_VOLT_MASK,
    + .run_on_mask = LDO1_RUN_ON,
    + .snvs_on_mask = LDO1_SNVS_ON,
    + .suspend_on_mask = LDO1_SUSP_ON,
    + .lpsr_on_mask = LDO1_LPSR_ON,
    +};
    +
    +const struct rohm_dvs_config ldo2_dvs = {
    + .level_map = ROHM_DVS_LEVEL_RUN | ROHM_DVS_LEVEL_SNVS |
    + ROHM_DVS_LEVEL_SUSPEND | ROHM_DVS_LEVEL_LPSR,
    + .run_reg = BD71815_REG_LDO_MODE2,
    + .run_mask = BD71815_VOLT_MASK,
    + .run_on_mask = LDO2_RUN_ON,
    + .snvs_on_mask = LDO2_SNVS_ON,
    + .suspend_on_mask = LDO2_SUSP_ON,
    + .lpsr_on_mask = LDO2_LPSR_ON,
    +};
    +
    +const struct rohm_dvs_config ldo3_dvs = {
    + .level_map = ROHM_DVS_LEVEL_RUN | ROHM_DVS_LEVEL_SNVS |
    + ROHM_DVS_LEVEL_SUSPEND | ROHM_DVS_LEVEL_LPSR,
    + .run_reg = BD71815_REG_LDO_MODE2,
    + .run_mask = BD71815_VOLT_MASK,
    + .run_on_mask = LDO3_RUN_ON,
    + .snvs_on_mask = LDO3_SNVS_ON,
    + .suspend_on_mask = LDO3_SUSP_ON,
    + .lpsr_on_mask = LDO3_LPSR_ON,
    +};
    +
    +const struct rohm_dvs_config ldo4_dvs = {
    + .level_map = ROHM_DVS_LEVEL_RUN | ROHM_DVS_LEVEL_SNVS |
    + ROHM_DVS_LEVEL_SUSPEND | ROHM_DVS_LEVEL_LPSR,
    + .run_reg = BD71815_REG_LDO_MODE3,
    + .run_mask = BD71815_VOLT_MASK,
    + .run_on_mask = LDO4_RUN_ON,
    + .snvs_on_mask = LDO4_SNVS_ON,
    + .suspend_on_mask = LDO4_SUSP_ON,
    + .lpsr_on_mask = LDO4_LPSR_ON,
    +};
    +
    +const struct rohm_dvs_config ldo5_dvs = {
    + .level_map = ROHM_DVS_LEVEL_RUN | ROHM_DVS_LEVEL_SNVS |
    + ROHM_DVS_LEVEL_SUSPEND | ROHM_DVS_LEVEL_LPSR,
    + .run_reg = BD71815_REG_LDO_MODE3,
    + .run_mask = BD71815_VOLT_MASK,
    + .run_on_mask = LDO5_RUN_ON,
    + .snvs_on_mask = LDO5_SNVS_ON,
    + .suspend_on_mask = LDO5_SUSP_ON,
    + .lpsr_on_mask = LDO5_LPSR_ON,
    +};
    +
    +const struct rohm_dvs_config dvref_dvs = {
    + .level_map = ROHM_DVS_LEVEL_RUN | ROHM_DVS_LEVEL_SNVS |
    + ROHM_DVS_LEVEL_SUSPEND | ROHM_DVS_LEVEL_LPSR,
    + .run_on_mask = DVREF_RUN_ON,
    + .snvs_on_mask = DVREF_SNVS_ON,
    + .suspend_on_mask = DVREF_SUSP_ON,
    + .lpsr_on_mask = DVREF_LPSR_ON,
    +};
    +
    +const struct rohm_dvs_config ldolpsr_dvs = {
    + .level_map = ROHM_DVS_LEVEL_RUN | ROHM_DVS_LEVEL_SNVS |
    + ROHM_DVS_LEVEL_SUSPEND | ROHM_DVS_LEVEL_LPSR,
    + .run_on_mask = DVREF_RUN_ON,
    + .snvs_on_mask = DVREF_SNVS_ON,
    + .suspend_on_mask = DVREF_SUSP_ON,
    + .lpsr_on_mask = DVREF_LPSR_ON,
    +};
    +
    +const struct rohm_dvs_config buck5_dvs = {
    + .level_map = ROHM_DVS_LEVEL_RUN | ROHM_DVS_LEVEL_SNVS |
    + ROHM_DVS_LEVEL_SUSPEND | ROHM_DVS_LEVEL_LPSR,
    + .run_reg = BD71815_REG_BUCK5_VOLT,
    + .run_mask = BD71815_VOLT_MASK,
    + .run_on_mask = BD71815_BUCK_RUN_ON,
    + .snvs_on_mask = BD71815_BUCK_SNVS_ON,
    + .suspend_on_mask = BD71815_BUCK_SUSP_ON,
    + .lpsr_on_mask = BD71815_BUCK_LPSR_ON,
    +};
    +
    +static int set_hw_dvs_levels(struct device_node *np,
    + const struct regulator_desc *desc,
    + struct regulator_config *cfg)
    +{
    + struct bd71815_regulator *data;
    +
    + data = container_of(desc, struct bd71815_regulator, desc);
    + return rohm_regulator_set_dvs_levels(data->dvs, np, desc, cfg->regmap);
    +}
    +
    +static int buck12_set_hw_dvs_levels(struct device_node *np,
    + const struct regulator_desc *desc,
    + struct regulator_config *cfg)
    +{
    + struct bd71815_regulator *data;
    + int ret = 0, val;
    +
    + data = container_of(desc, struct bd71815_regulator, desc);
    +
    + if (of_find_property(np, "rohm,dvs-run-voltage", NULL) ||
    + of_find_property(np, "rohm,dvs-suspend-voltage", NULL) ||
    + of_find_property(np, "rohm,dvs-lpsr-voltage", NULL) ||
    + of_find_property(np, "rohm,dvs-snvs-voltage", NULL)) {
    + ret = regmap_read(cfg->regmap, desc->vsel_reg, &val);
    + if (ret)
    + return ret;
    +
    + if (!(BD71815_BUCK_STBY_DVS & val) &&
    + !(BD71815_BUCK_DVSSEL & val)) {
    + int val2;
    +
    + /*
    + * We are currently using voltage from _L.
    + * We'd better copy it to _H and switch to it to
    + * avoid shutting us down if LPSR or SUSPEND is set to
    + * disabled. _L value is at reg _H + 1
    + */
    + ret = regmap_read(cfg->regmap, desc->vsel_reg + 1,
    + &val2);
    + if (ret)
    + return ret;
    +
    + ret = regmap_update_bits(cfg->regmap, desc->vsel_reg,
    + BD71815_VOLT_MASK |
    + BD71815_BUCK_DVSSEL,
    + val2 | BD71815_BUCK_DVSSEL);
    + if (ret)
    + return ret;
    + }
    + ret = rohm_regulator_set_dvs_levels(data->dvs, np, desc,
    + cfg->regmap);
    + if (ret)
    + return ret;
    + /*
    + * DVS levels were given => use HW-state machine for voltage
    + * controls. NOTE: This means that if voltage is changed
    + * by SW the ramp-rate is not respected. Should we disable
    + * SW voltage control when the HW state machine is used?
    + */
    + ret = regmap_update_bits(cfg->regmap, desc->vsel_reg,
    + BD71815_BUCK_STBY_DVS,
    + BD71815_BUCK_STBY_DVS);
    + }
    +
    + return ret;
    +}
    +
    +/*
    + * BUCK1/2
    + * BUCK1RAMPRATE[1:0] BUCK1 DVS ramp rate setting
    + * 00: 10.00mV/usec 10mV 1uS
    + * 01: 5.00mV/usec 10mV 2uS
    + * 10: 2.50mV/usec 10mV 4uS
    + * 11: 1.25mV/usec 10mV 8uS
    + */
    +static int bd7181x_buck12_set_ramp_delay(struct regulator_dev *rdev,
    + int ramp_delay)
    +{
    + struct bd71815_pmic *pmic = rdev_get_drvdata(rdev);
    + int id = rdev->desc->id;
    + unsigned int ramp_value = BD71815_BUCK_RAMPRATE_10P00MV;
    +
    + switch (ramp_delay) {
    + case 1 ... 1250:
    + ramp_value = BD71815_BUCK_RAMPRATE_1P25MV;
    + break;
    + case 1251 ... 2500:
    + ramp_value = BD71815_BUCK_RAMPRATE_2P50MV;
    + break;
    + case 2501 ... 5000:
    + ramp_value = BD71815_BUCK_RAMPRATE_5P00MV;
    + break;
    + case 5001 ... 10000:
    + ramp_value = BD71815_BUCK_RAMPRATE_10P00MV;
    + break;
    + default:
    + ramp_value = BD71815_BUCK_RAMPRATE_10P00MV;
    + dev_err(pmic->dev,
    + "%s: ramp_delay: %d not supported, setting 10000mV//us\n",
    + rdev->desc->name, ramp_delay);
    + }
    +
    + return regmap_update_bits(pmic->regmap, BD71815_REG_BUCK1_MODE + id*0x1,
    + BD71815_BUCK_RAMPRATE_MASK, ramp_value << 6);
    +}
    +
    +static int bd7181x_led_set_current_limit(struct regulator_dev *rdev,
    + int min_uA, int max_uA)
    +{
    + int ret;
    + int onstatus;
    +
    + onstatus = regulator_is_enabled_regmap(rdev);
    +
    + ret = regulator_set_current_limit_regmap(rdev, min_uA, max_uA);
    + if (!ret) {
    + int newstatus;
    +
    + newstatus = regulator_is_enabled_regmap(rdev);
    + if (onstatus != newstatus) {
    + /*
    + * HW FIX: spurious led status change detected. Toggle
    + * state as a workaround
    + */
    + if (onstatus)
    + ret = regulator_enable_regmap(rdev);
    + else
    + ret = regulator_disable_regmap(rdev);
    +
    + if (ret)
    + dev_err(rdev_get_dev(rdev),
    + "LED status error\n");
    + }
    + }
    + return ret;
    +}
    +
    +static int bd7181x_buck12_get_voltage_sel(struct regulator_dev *rdev)
    +{
    + struct bd71815_pmic *pmic = rdev_get_drvdata(rdev);
    + int rid = rdev_get_id(rdev);
    + int ret, regh, regl, val;
    +
    + regh = BD71815_REG_BUCK1_VOLT_H + rid * 0x2;
    + regl = BD71815_REG_BUCK1_VOLT_L + rid * 0x2;
    +
    + ret = regmap_read(pmic->regmap, regh, &val);
    + if (ret)
    + return ret;
    +
    + /*
    + * If we use HW state machine based voltage reg selection - then we
    + * return BD71815_REG_BUCK1_VOLT_H which is used at RUN.
    + * Else we do return the BD71815_REG_BUCK1_VOLT_H or
    + * BD71815_REG_BUCK1_VOLT_L depending on which is selected to be used
    + * by BD71815_BUCK_DVSSEL bit
    + */
    + if ((!(val & BD71815_BUCK_STBY_DVS)) && (!(val & BD71815_BUCK_DVSSEL)))
    + ret = regmap_read(pmic->regmap, regl, &val);
    +
    + if (ret)
    + return ret;
    +
    + return val & BD71815_VOLT_MASK;
    +}
    +
    +/*
    + * For Buck 1/2.
    + *
    + */
    +static int bd7181x_buck12_set_voltage_sel(struct regulator_dev *rdev,
    + unsigned int sel)
    +{
    + struct bd71815_pmic *pmic = rdev_get_drvdata(rdev);
    + int rid = rdev_get_id(rdev);
    + int ret, val, reg, regh, regl;
    +
    + regh = BD71815_REG_BUCK1_VOLT_H + rid*0x2;
    + regl = BD71815_REG_BUCK1_VOLT_L + rid*0x2;
    +
    + ret = regmap_read(pmic->regmap, regh, &val);
    + if (ret)
    + return ret;
    +
    + /*
    + * If bucks 1 & 2 are controlled by state machine - then the RUN state
    + * voltage is set to BD71815_VOLT_MASK. Changing SUSPEND/LPSR voltages at
    + * runtime is not supported by this driver.
    + */
    + if (((val & BD71815_BUCK_STBY_DVS))) {
    + return regmap_update_bits(pmic->regmap, regh, BD71815_VOLT_MASK,
    + sel);
    + }
    + /* Update new voltage to the register which is not selected now */
    + if (val & BD71815_BUCK_DVSSEL)
    + reg = regl;
    + else
    + reg = regh;
    +
    + ret = regmap_update_bits(pmic->regmap, reg, BD71815_VOLT_MASK, sel);
    + if (ret)
    + return ret;
    +
    + /* Select the other DVS register to be used */
    + return regmap_update_bits(pmic->regmap, regh, BD71815_BUCK_DVSSEL, ~val);
    +}
    +
    +static const struct regulator_ops bd7181x_ldo_regulator_ops = {
    + .enable = regulator_enable_regmap,
    + .disable = regulator_disable_regmap,
    + .is_enabled = regulator_is_enabled_regmap,
    + .list_voltage = regulator_list_voltage_linear,
    + .set_voltage_sel = regulator_set_voltage_sel_regmap,
    + .get_voltage_sel = regulator_get_voltage_sel_regmap,
    +};
    +
    +static const struct regulator_ops bd7181x_fixed_regulator_ops = {
    + .enable = regulator_enable_regmap,
    + .disable = regulator_disable_regmap,
    + .is_enabled = regulator_is_enabled_regmap,
    + .list_voltage = regulator_list_voltage_linear,
    +};
    +
    +static const struct regulator_ops bd7181x_buck_regulator_ops = {
    + .enable = regulator_enable_regmap,
    + .disable = regulator_disable_regmap,
    + .is_enabled = regulator_is_enabled_regmap,
    + .list_voltage = regulator_list_voltage_linear,
    + .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,
    +};
    +
    +static const struct regulator_ops bd7181x_buck12_regulator_ops = {
    + .enable = regulator_enable_regmap,
    + .disable = regulator_disable_regmap,
    + .is_enabled = regulator_is_enabled_regmap,
    + .list_voltage = regulator_list_voltage_linear,
    + .set_voltage_sel = bd7181x_buck12_set_voltage_sel,
    + .get_voltage_sel = bd7181x_buck12_get_voltage_sel,
    + .set_voltage_time_sel = regulator_set_voltage_time_sel,
    + .set_ramp_delay = bd7181x_buck12_set_ramp_delay,
    +};
    +
    +static const struct regulator_ops bd7181x_led_regulator_ops = {
    + .enable = regulator_enable_regmap,
    + .disable = regulator_disable_regmap,
    + .is_enabled = regulator_is_enabled_regmap,
    + .set_current_limit = bd7181x_led_set_current_limit,
    + .get_current_limit = regulator_get_current_limit_regmap,
    +};
    +
    +#define BD71815_FIXED_REG(_name, _id, ereg, emsk, voltage, _dvs) \
    + [(_id)] = { \
    + .desc = { \
    + .name = #_name, \
    + .of_match = of_match_ptr(#_name), \
    + .regulators_node = of_match_ptr("regulators"), \
    + .n_voltages = 1, \
    + .ops = &bd7181x_fixed_regulator_ops, \
    + .type = REGULATOR_VOLTAGE, \
    + .id = (_id), \
    + .owner = THIS_MODULE, \
    + .min_uV = (voltage), \
    + .enable_reg = (ereg), \
    + .enable_mask = (emsk), \
    + .of_parse_cb = set_hw_dvs_levels, \
    + }, \
    + .dvs = (_dvs), \
    + }
    +
    +#define BD71815_BUCK_REG(_name, _id, vsel, ereg, min, max, step, _dvs) \
    + [(_id)] = { \
    + .desc = { \
    + .name = #_name, \
    + .of_match = of_match_ptr(#_name), \
    + .regulators_node = of_match_ptr("regulators"), \
    + .n_voltages = ((max) - (min)) / (step) + 1, \
    + .ops = &bd7181x_buck_regulator_ops, \
    + .type = REGULATOR_VOLTAGE, \
    + .id = (_id), \
    + .owner = THIS_MODULE, \
    + .min_uV = (min), \
    + .uV_step = (step), \
    + .vsel_reg = (vsel), \
    + .vsel_mask = BD71815_VOLT_MASK, \
    + .enable_reg = (ereg), \
    + .enable_mask = BD71815_BUCK_RUN_ON, \
    + .of_parse_cb = set_hw_dvs_levels, \
    + }, \
    + .dvs = (_dvs), \
    + }
    +
    +#define BD71815_BUCK12_REG(_name, _id, vsel, ereg, min, max, step, \
    + _dvs) \
    + [(_id)] = { \
    + .desc = { \
    + .name = #_name, \
    + .of_match = of_match_ptr(#_name), \
    + .regulators_node = of_match_ptr("regulators"), \
    + .n_voltages = ((max) - (min)) / (step) + 1, \
    + .ops = &bd7181x_buck12_regulator_ops, \
    + .type = REGULATOR_VOLTAGE, \
    + .id = (_id), \
    + .owner = THIS_MODULE, \
    + .min_uV = (min), \
    + .uV_step = (step), \
    + .vsel_reg = (vsel), \
    + .vsel_mask = 0x3f, \
    + .enable_reg = (ereg), \
    + .enable_mask = 0x04, \
    + .of_parse_cb = buck12_set_hw_dvs_levels, \
    + }, \
    + .dvs = (_dvs), \
    + }
    +
    +#define BD71815_LED_REG(_name, _id, csel, mask, ereg, emsk, currents) \
    + [(_id)] = { \
    + .desc = { \
    + .name = #_name, \
    + .of_match = of_match_ptr(#_name), \
    + .regulators_node = of_match_ptr("regulators"), \
    + .n_current_limits = ARRAY_SIZE(currents), \
    + .ops = &bd7181x_led_regulator_ops, \
    + .type = REGULATOR_CURRENT, \
    + .id = (_id), \
    + .owner = THIS_MODULE, \
    + .curr_table = currents, \
    + .csel_reg = (csel), \
    + .csel_mask = (mask), \
    + .enable_reg = (ereg), \
    + .enable_mask = (emsk), \
    + }, \
    + }
    +
    +#define BD71815_LDO_REG(_name, _id, vsel, ereg, emsk, min, max, step, \
    + _dvs) \
    + [(_id)] = { \
    + .desc = { \
    + .name = #_name, \
    + .of_match = of_match_ptr(#_name), \
    + .regulators_node = of_match_ptr("regulators"), \
    + .n_voltages = ((max) - (min)) / (step) + 1, \
    + .ops = &bd7181x_ldo_regulator_ops, \
    + .type = REGULATOR_VOLTAGE, \
    + .id = (_id), \
    + .owner = THIS_MODULE, \
    + .min_uV = (min), \
    + .uV_step = (step), \
    + .vsel_reg = (vsel), \
    + .vsel_mask = BD71815_VOLT_MASK, \
    + .enable_reg = (ereg), \
    + .enable_mask = (emsk), \
    + .of_parse_cb = set_hw_dvs_levels, \
    + }, \
    + .dvs = (_dvs), \
    + }
    +
    +static struct bd71815_regulator bd71815_regulators[] = {
    + BD71815_BUCK12_REG(buck1, BD71815_BUCK1, BD71815_REG_BUCK1_VOLT_H,
    + BD71815_REG_BUCK1_MODE, 800000, 2000000, 25000,
    + &buck1_dvs),
    + BD71815_BUCK12_REG(buck2, BD71815_BUCK2, BD71815_REG_BUCK2_VOLT_H,
    + BD71815_REG_BUCK2_MODE, 800000, 2000000, 25000,
    + &buck2_dvs),
    + BD71815_BUCK_REG(buck3, BD71815_BUCK3, BD71815_REG_BUCK3_VOLT,
    + BD71815_REG_BUCK3_MODE, 1200000, 2700000, 50000,
    + &buck3_dvs),
    + BD71815_BUCK_REG(buck4, BD71815_BUCK4, BD71815_REG_BUCK4_VOLT,
    + BD71815_REG_BUCK4_MODE, 1100000, 1850000, 25000,
    + &buck4_dvs),
    + BD71815_BUCK_REG(buck5, BD71815_BUCK5, BD71815_REG_BUCK5_VOLT,
    + BD71815_REG_BUCK5_MODE, 1800000, 3300000, 50000,
    + &buck5_dvs),
    + BD71815_LDO_REG(ldo1, BD71815_LDO1, BD71815_REG_LDO1_VOLT,
    + BD71815_REG_LDO_MODE1, LDO1_RUN_ON, 800000, 3300000,
    + 50000, &ldo1_dvs),
    + BD71815_LDO_REG(ldo2, BD71815_LDO2, BD71815_REG_LDO2_VOLT,
    + BD71815_REG_LDO_MODE2, LDO2_RUN_ON, 800000, 3300000,
    + 50000, &ldo2_dvs),
    + /*
    + * Let's default LDO3 to be enabled by SW. We can override ops if DT
    + * says LDO3 should be enabled by HW when DCIN is connected.
    + */
    + BD71815_LDO_REG(ldo3, BD71815_LDO3, BD71815_REG_LDO3_VOLT,
    + BD71815_REG_LDO_MODE2, LDO3_RUN_ON, 800000, 3300000,
    + 50000, &ldo3_dvs),
    + BD71815_LDO_REG(ldo4, BD71815_LDO4, BD71815_REG_LDO4_VOLT,
    + BD71815_REG_LDO_MODE3, LDO4_RUN_ON, 800000, 3300000,
    + 50000, &ldo4_dvs),
    + BD71815_LDO_REG(ldo5, BD71815_LDO5, BD71815_REG_LDO5_VOLT_H,
    + BD71815_REG_LDO_MODE3, LDO5_RUN_ON, 800000, 3300000,
    + 50000, &ldo5_dvs),
    + BD71815_FIXED_REG(ldodvref, BD71815_LDODVREF, BD71815_REG_LDO_MODE4,
    + DVREF_RUN_ON, 3000000, &dvref_dvs),
    + BD71815_FIXED_REG(ldolpsr, BD71815_LDOLPSR, BD71815_REG_LDO_MODE4,
    + LDO_LPSR_RUN_ON, 1800000, &ldolpsr_dvs),
    + BD71815_LED_REG(wled, BD71815_WLED, BD71815_REG_LED_DIMM, LED_DIMM_MASK,
    + BD71815_REG_LED_CTRL, LED_RUN_ON,
    + bd7181x_wled_currents),
    +};
    +
    +int bd7181x_probe(struct platform_device *pdev)
    +{
    + struct bd71815_pmic *pmic;
    + struct regulator_config config = {};
    + int i, ret;
    + struct gpio_desc *ldo4_en;
    +
    + pmic = devm_kzalloc(&pdev->dev, sizeof(*pmic), GFP_KERNEL);
    + if (!pmic)
    + return -ENOMEM;
    +
    + memcpy(pmic->descs, bd71815_regulators, sizeof(pmic->descs));
    +
    + pmic->dev = &pdev->dev;
    + pmic->regmap = dev_get_regmap(pdev->dev.parent, NULL);
    + if (!pmic->regmap) {
    + dev_err(pmic->dev, "No parent regmap\n");
    + return -ENODEV;
    + }
    + platform_set_drvdata(pdev, pmic);
    + ldo4_en = devm_gpiod_get_from_of_node(&pdev->dev,
    + pdev->dev.parent->of_node,
    + "rohm,vsel-gpios", 0,
    + GPIOD_ASIS, "ldo4-en");
    +
    + if (IS_ERR(ldo4_en)) {
    + ret = PTR_ERR(ldo4_en);
    + if (ret != -ENOENT)
    + return ret;
    + ldo4_en = NULL;
    + }
    +
    + /* Disable to go to ship-mode */
    + ret = regmap_update_bits(pmic->regmap, BD71815_REG_PWRCTRL, RESTARTEN, 0);
    + if (ret)
    + return ret;
    +
    + config.dev = pdev->dev.parent;
    + config.regmap = pmic->regmap;
    +
    + for (i = 0; i < BD71815_REGULATOR_CNT; i++) {
    + struct regulator_desc *desc;
    + struct regulator_dev *rdev;
    +
    + desc = &pmic->descs[i].desc;
    + if (i == BD71815_LDO4)
    + config.ena_gpiod = ldo4_en;
    +
    + config.driver_data = pmic;
    +
    + rdev = devm_regulator_register(&pdev->dev, desc, &config);
    + if (IS_ERR(rdev)) {
    + dev_err(&pdev->dev,
    + "failed to register %s regulator\n",
    + desc->name);
    + return PTR_ERR(rdev);
    + }
    + config.ena_gpiod = NULL;
    + pmic->rdev[i] = rdev;
    + }
    + return 0;
    +}
    +
    +static const struct platform_device_id bd7181x_pmic_id[] = {
    + { "bd71815-pmic", ROHM_CHIP_TYPE_BD71815 },
    + { },
    +};
    +MODULE_DEVICE_TABLE(platform, bd7181x_pmic_id);
    +
    +static struct platform_driver bd7181x_regulator = {
    + .driver = {
    + .name = "bd7181x-pmic",
    + .owner = THIS_MODULE,
    + },
    + .probe = bd7181x_probe,
    + .id_table = bd7181x_pmic_id,
    +/* .remove = bd7181x_remove, */
    +};
    +module_platform_driver(bd7181x_regulator);
    +
    +MODULE_AUTHOR("Tony Luo <luofc@embedinfo.com>");
    +MODULE_DESCRIPTION("BD71815 voltage regulator driver");
    +MODULE_LICENSE("GPL v2");
    +MODULE_ALIAS("platform:bd7181x-pmic");
    --
    2.25.4

    --
    Matti Vaittinen, Linux device drivers
    ROHM Semiconductors, Finland SWDC
    Kiviharjunlenkki 1E
    90220 OULU
    FINLAND

    ~~~ "I don't think so," said Rene Descartes. Just then he vanished ~~~
    Simon says - in Latin please.
    ~~~ "non cogito me" dixit Rene Descarte, deinde evanescavit ~~~
    Thanks to Simon Glass for the translation =]

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