// SPDX-License-Identifier: GPL-2.0
// Copyright (C) 2018 ROHM Semiconductors
// bd71837-regulator.c ROHM BD71837MWV regulator driver
#include <linux/delay.h>
#include <linux/err.h>
#include <linux/gpio.h>
#include <linux/interrupt.h>
#include <linux/kernel.h>
#include <linux/mfd/rohm-bd718x7.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/regulator/driver.h>
#include <linux/regulator/machine.h>
#include <linux/regulator/of_regulator.h>
#include <linux/slab.h>
struct bd71837_pmic {
struct regulator_desc descs[BD71837_REGULATOR_CNT];
struct bd71837 *mfd;
struct platform_device *pdev;
struct regulator_dev *rdev[BD71837_REGULATOR_CNT];
};
/*
* BUCK1/2/3/4
* BUCK1RAMPRATE[1:0] BUCK1 DVS ramp rate setting
* 00: 10.00mV/usec 10mV 1uS
* 01: 5.00mV/usec 10mV 2uS
* 10: 2.50mV/usec 10mV 4uS
* 11: 1.25mV/usec 10mV 8uS
*/
static int bd71837_buck1234_set_ramp_delay(struct regulator_dev *rdev,
int ramp_delay)
{
struct bd71837_pmic *pmic = rdev_get_drvdata(rdev);
struct bd71837 *mfd = pmic->mfd;
int id = rdev->desc->id;
unsigned int ramp_value = BUCK_RAMPRATE_10P00MV;
dev_dbg(&pmic->pdev->dev, "Buck[%d] Set Ramp = %d\n", id + 1,
ramp_delay);
switch (ramp_delay) {
case 1 ... 1250:
ramp_value = BUCK_RAMPRATE_1P25MV;
break;
case 1251 ... 2500:
ramp_value = BUCK_RAMPRATE_2P50MV;
break;
case 2501 ... 5000:
ramp_value = BUCK_RAMPRATE_5P00MV;
break;
case 5001 ... 10000:
ramp_value = BUCK_RAMPRATE_10P00MV;
break;
default:
ramp_value = BUCK_RAMPRATE_10P00MV;
dev_err(&pmic->pdev->dev,
"%s: ramp_delay: %d not supported, setting 10000mV//us\n",
rdev->desc->name, ramp_delay);
}
return regmap_update_bits(mfd->regmap, BD71837_REG_BUCK1_CTRL + id,
BUCK_RAMPRATE_MASK, ramp_value << 6);
}
/* Bucks 1 to 4 support DVS. PWM mode is used when voltage is changed.
* Bucks 5 to 8 and LDOs can use PFM and must be disabled when voltage
* is changed. Hence we return -EBUSY for these if voltage is changed
* when BUCK/LDO is enabled.
*/
static int bd71837_set_voltage_sel_restricted(struct regulator_dev *rdev,
unsigned int sel)
{
if (regulator_is_enabled_regmap(rdev))
return -EBUSY;
return regulator_set_voltage_sel_regmap(rdev, sel);
}
static struct regulator_ops bd71837_ldo_regulator_ops = {
.enable = regulator_enable_regmap,
.disable = regulator_disable_regmap,
.is_enabled = regulator_is_enabled_regmap,
.list_voltage = regulator_list_voltage_linear_range,
.set_voltage_sel = bd71837_set_voltage_sel_restricted,
.get_voltage_sel = regulator_get_voltage_sel_regmap,
};
static struct regulator_ops bd71837_ldo_regulator_nolinear_ops = {
.enable = regulator_enable_regmap,
.disable = regulator_disable_regmap,
.is_enabled = regulator_is_enabled_regmap,
.list_voltage = regulator_list_voltage_table,
.set_voltage_sel = bd71837_set_voltage_sel_restricted,
.get_voltage_sel = regulator_get_voltage_sel_regmap,
};
static struct regulator_ops bd71837_buck_regulator_ops = {
.enable = regulator_enable_regmap,
.disable = regulator_disable_regmap,
.is_enabled = regulator_is_enabled_regmap,
.list_voltage = regulator_list_voltage_linear_range,
.set_voltage_sel = bd71837_set_voltage_sel_restricted,
.get_voltage_sel = regulator_get_voltage_sel_regmap,
.set_voltage_time_sel = regulator_set_voltage_time_sel,
};
static struct regulator_ops bd71837_buck_regulator_nolinear_ops = {
.enable = regulator_enable_regmap,
.disable = regulator_disable_regmap,
.is_enabled = regulator_is_enabled_regmap,
.list_voltage = regulator_list_voltage_table,
.set_voltage_sel = bd71837_set_voltage_sel_restricted,
.get_voltage_sel = regulator_get_voltage_sel_regmap,
.set_voltage_time_sel = regulator_set_voltage_time_sel,
};
static struct regulator_ops bd71837_buck1234_regulator_ops = {
.enable = regulator_enable_regmap,
.disable = regulator_disable_regmap,
.is_enabled = regulator_is_enabled_regmap,
.list_voltage = regulator_list_voltage_linear_range,
.set_voltage_sel = regulator_set_voltage_sel_regmap,
.get_voltage_sel = regulator_get_voltage_sel_regmap,
.set_voltage_time_sel = regulator_set_voltage_time_sel,
.set_ramp_delay = bd71837_buck1234_set_ramp_delay,
};
/*
* BUCK1/2/3/4
* 0.70 to 1.30V (10mV step)
*/
static const struct regulator_linear_range bd71837_buck1234_voltage_ranges[] = {
REGULATOR_LINEAR_RANGE(700000, 0x00, 0x3C, 10000),
REGULATOR_LINEAR_RANGE(1300000, 0x3D, 0x3F, 0),
};
/*
* BUCK5
* 0.9V to 1.35V ()
*/
static const struct regulator_linear_range bd71837_buck5_voltage_ranges[] = {
REGULATOR_LINEAR_RANGE(700000, 0x00, 0x03, 100000),
REGULATOR_LINEAR_RANGE(1050000, 0x04, 0x05, 50000),
REGULATOR_LINEAR_RANGE(1200000, 0x06, 0x07, 150000),
};
/*
* BUCK6
* 3.0V to 3.3V (step 100mV)
*/
static const struct regulator_linear_range bd71837_buck6_voltage_ranges[] = {
REGULATOR_LINEAR_RANGE(3000000, 0x00, 0x03, 100000),
};
/*
* BUCK7
* 000 = 1.605V
* 001 = 1.695V
* 010 = 1.755V
* 011 = 1.8V (Initial)
* 100 = 1.845V
* 101 = 1.905V
* 110 = 1.95V
* 111 = 1.995V
*/
static const unsigned int buck_7_volts[] = {
1605000, 1695000, 1755000, 1800000, 1845000, 1905000, 1950000, 1995000
};
/*
* BUCK8
* 0.8V to 1.40V (step 10mV)
*/
static const struct regulator_linear_range bd71837_buck8_voltage_ranges[] = {
REGULATOR_LINEAR_RANGE(800000, 0x00, 0x3C, 10000),
REGULATOR_LINEAR_RANGE(1400000, 0x3D, 0x3F, 0),
};
/*
* LDO1
* 3.0 to 3.3V (100mV step)
*/
static const struct regulator_linear_range bd71837_ldo1_voltage_ranges[] = {
REGULATOR_LINEAR_RANGE(3000000, 0x00, 0x03, 100000),
};
/*
* LDO2
* 0.8 or 0.9V
*/
static const unsigned int ldo_2_volts[] = {
900000, 800000
};
/*
* LDO3
* 1.8 to 3.3V (100mV step)
*/
static const struct regulator_linear_range bd71837_ldo3_voltage_ranges[] = {
REGULATOR_LINEAR_RANGE(1800000, 0x00, 0x0F, 100000),
};
/*
* LDO4
* 0.9 to 1.8V (100mV step)
*/
static const struct regulator_linear_range bd71837_ldo4_voltage_ranges[] = {
REGULATOR_LINEAR_RANGE(900000, 0x00, 0x09, 100000),
REGULATOR_LINEAR_RANGE(1800000, 0x0A, 0x0F, 0),
};
/*
* LDO5
* 1.8 to 3.3V (100mV step)
*/
static const struct regulator_linear_range bd71837_ldo5_voltage_ranges[] = {
REGULATOR_LINEAR_RANGE(1800000, 0x00, 0x0F, 100000),
};
/*
* LDO6
* 0.9 to 1.8V (100mV step)
*/
static const struct regulator_linear_range bd71837_ldo6_voltage_ranges[] = {
REGULATOR_LINEAR_RANGE(900000, 0x00, 0x09, 100000),
REGULATOR_LINEAR_RANGE(1800000, 0x0A, 0x0F, 0),
};
/*
* LDO7
* 1.8 to 3.3V (100mV step)
*/
static const struct regulator_linear_range bd71837_ldo7_voltage_ranges[] = {
REGULATOR_LINEAR_RANGE(1800000, 0x00, 0x0F, 100000),
};
static const struct regulator_desc bd71837_regulators[] = {
{
.name = "buck1",
.of_match = of_match_ptr("BUCK1"),
.regulators_node = of_match_ptr("regulators"),
.id = BD71837_BUCK1,
.ops = &bd71837_buck1234_regulator_ops,
.type = REGULATOR_VOLTAGE,
.n_voltages = BD71837_BUCK1_VOLTAGE_NUM,
.linear_ranges = bd71837_buck1234_voltage_ranges,
.n_linear_ranges = ARRAY_SIZE(bd71837_buck1234_voltage_ranges),
.vsel_reg = BD71837_REG_BUCK1_VOLT_RUN,
.vsel_mask = BUCK1_RUN_MASK,
.enable_reg = BD71837_REG_BUCK1_CTRL,
.enable_mask = BD71837_BUCK_EN,
.owner = THIS_MODULE,
},
{
.name = "buck2",
.of_match = of_match_ptr("BUCK2"),
.regulators_node = of_match_ptr("regulators"),
.id = BD71837_BUCK2,
.ops = &bd71837_buck1234_regulator_ops,
.type = REGULATOR_VOLTAGE,
.n_voltages = BD71837_BUCK2_VOLTAGE_NUM,
.linear_ranges = bd71837_buck1234_voltage_ranges,
.n_linear_ranges = ARRAY_SIZE(bd71837_buck1234_voltage_ranges),
.vsel_reg = BD71837_REG_BUCK2_VOLT_RUN,
.vsel_mask = BUCK2_RUN_MASK,
.enable_reg = BD71837_REG_BUCK2_CTRL,
.enable_mask = BD71837_BUCK_EN,
.owner = THIS_MODULE,
},
{
.name = "buck3",
.of_match = of_match_ptr("BUCK3"),
.regulators_node = of_match_ptr("regulators"),
.id = BD71837_BUCK3,
.ops = &bd71837_buck1234_regulator_ops,
.type = REGULATOR_VOLTAGE,
.n_voltages = BD71837_BUCK3_VOLTAGE_NUM,
.linear_ranges = bd71837_buck1234_voltage_ranges,
.n_linear_ranges = ARRAY_SIZE(bd71837_buck1234_voltage_ranges),
.vsel_reg = BD71837_REG_BUCK3_VOLT_RUN,
.vsel_mask = BUCK3_RUN_MASK,
.enable_reg = BD71837_REG_BUCK3_CTRL,
.enable_mask = BD71837_BUCK_EN,
.owner = THIS_MODULE,
},
{
.name = "buck4",
.of_match = of_match_ptr("BUCK4"),
.regulators_node = of_match_ptr("regulators"),
.id = BD71837_BUCK4,
.ops = &bd71837_buck1234_regulator_ops,
.type = REGULATOR_VOLTAGE,
.n_voltages = BD71837_BUCK4_VOLTAGE_NUM,
.linear_ranges = bd71837_buck1234_voltage_ranges,
.n_linear_ranges = ARRAY_SIZE(bd71837_buck1234_voltage_ranges),
.vsel_reg = BD71837_REG_BUCK4_VOLT_RUN,
.vsel_mask = BUCK4_RUN_MASK,
.enable_reg = BD71837_REG_BUCK4_CTRL,
.enable_mask = BD71837_BUCK_EN,
.owner = THIS_MODULE,
},
{
.name = "buck5",
.of_match = of_match_ptr("BUCK5"),
.regulators_node = of_match_ptr("regulators"),
.id = BD71837_BUCK5,
.ops = &bd71837_buck_regulator_ops,
.type = REGULATOR_VOLTAGE,
.n_voltages = BD71837_BUCK5_VOLTAGE_NUM,
.linear_ranges = bd71837_buck5_voltage_ranges,
.n_linear_ranges = ARRAY_SIZE(bd71837_buck5_voltage_ranges),
.vsel_reg = BD71837_REG_BUCK5_VOLT,
.vsel_mask = BUCK5_MASK,
.enable_reg = BD71837_REG_BUCK5_CTRL,
.enable_mask = BD71837_BUCK_EN,
.owner = THIS_MODULE,
},
{
.name = "buck6",
.of_match = of_match_ptr("BUCK6"),
.regulators_node = of_match_ptr("regulators"),
.id = BD71837_BUCK6,
.ops = &bd71837_buck_regulator_ops,
.type = REGULATOR_VOLTAGE,
.n_voltages = BD71837_BUCK6_VOLTAGE_NUM,
.linear_ranges = bd71837_buck6_voltage_ranges,
.n_linear_ranges = ARRAY_SIZE(bd71837_buck6_voltage_ranges),
.vsel_reg = BD71837_REG_BUCK6_VOLT,
.vsel_mask = BUCK6_MASK,
.enable_reg = BD71837_REG_BUCK6_CTRL,
.enable_mask = BD71837_BUCK_EN,
.owner = THIS_MODULE,
},
{
.name = "buck7",
.of_match = of_match_ptr("BUCK7"),
.regulators_node = of_match_ptr("regulators"),
.id = BD71837_BUCK7,
.ops = &bd71837_buck_regulator_nolinear_ops,
.type = REGULATOR_VOLTAGE,
.volt_table = &buck_7_volts[0],
.n_voltages = ARRAY_SIZE(buck_7_volts),
.vsel_reg = BD71837_REG_BUCK7_VOLT,
.vsel_mask = BUCK7_MASK,
.enable_reg = BD71837_REG_BUCK7_CTRL,
.enable_mask = BD71837_BUCK_EN,
.owner = THIS_MODULE,
},
{
.name = "buck8",
.of_match = of_match_ptr("BUCK8"),
.regulators_node = of_match_ptr("regulators"),
.id = BD71837_BUCK8,
.ops = &bd71837_buck_regulator_ops,
.type = REGULATOR_VOLTAGE,
.n_voltages = BD71837_BUCK8_VOLTAGE_NUM,
.linear_ranges = bd71837_buck8_voltage_ranges,
.n_linear_ranges = ARRAY_SIZE(bd71837_buck8_voltage_ranges),
.vsel_reg = BD71837_REG_BUCK8_VOLT,
.vsel_mask = BUCK8_MASK,
.enable_reg = BD71837_REG_BUCK8_CTRL,
.enable_mask = BD71837_BUCK_EN,
.owner = THIS_MODULE,
},
{
.name = "ldo1",
.of_match = of_match_ptr("LDO1"),
.regulators_node = of_match_ptr("regulators"),
.id = BD71837_LDO1,
.ops = &bd71837_ldo_regulator_ops,
.type = REGULATOR_VOLTAGE,
.n_voltages = BD71837_LDO1_VOLTAGE_NUM,
.linear_ranges = bd71837_ldo1_voltage_ranges,
.n_linear_ranges = ARRAY_SIZE(bd71837_ldo1_voltage_ranges),
.vsel_reg = BD71837_REG_LDO1_VOLT,
.vsel_mask = LDO1_MASK,
.enable_reg = BD71837_REG_LDO1_VOLT,
.enable_mask = BD71837_LDO_EN,
.owner = THIS_MODULE,
},
{
.name = "ldo2",
.of_match = of_match_ptr("LDO2"),
.regulators_node = of_match_ptr("regulators"),
.id = BD71837_LDO2,
.ops = &bd71837_ldo_regulator_nolinear_ops,
.type = REGULATOR_VOLTAGE,
.volt_table = &ldo_2_volts[0],
.n_voltages = ARRAY_SIZE(ldo_2_volts),
.vsel_reg = BD71837_REG_LDO2_VOLT,
.vsel_mask = LDO2_MASK,
.enable_reg = BD71837_REG_LDO2_VOLT,
.enable_mask = BD71837_LDO_EN,
.owner = THIS_MODULE,
},
{
.name = "ldo3",
.of_match = of_match_ptr("LDO3"),
.regulators_node = of_match_ptr("regulators"),
.id = BD71837_LDO3,
.ops = &bd71837_ldo_regulator_ops,
.type = REGULATOR_VOLTAGE,
.n_voltages = BD71837_LDO3_VOLTAGE_NUM,
.linear_ranges = bd71837_ldo3_voltage_ranges,
.n_linear_ranges = ARRAY_SIZE(bd71837_ldo3_voltage_ranges),
.vsel_reg = BD71837_REG_LDO3_VOLT,
.vsel_mask = LDO3_MASK,
.enable_reg = BD71837_REG_LDO3_VOLT,
.enable_mask = BD71837_LDO_EN,
.owner = THIS_MODULE,
},
{
.name = "ldo4",
.of_match = of_match_ptr("LDO4"),
.regulators_node = of_match_ptr("regulators"),
.id = BD71837_LDO4,
.ops = &bd71837_ldo_regulator_ops,
.type = REGULATOR_VOLTAGE,
.n_voltages = BD71837_LDO4_VOLTAGE_NUM,
.linear_ranges = bd71837_ldo4_voltage_ranges,
.n_linear_ranges = ARRAY_SIZE(bd71837_ldo4_voltage_ranges),
.vsel_reg = BD71837_REG_LDO4_VOLT,
.vsel_mask = LDO4_MASK,
.enable_reg = BD71837_REG_LDO4_VOLT,
.enable_mask = BD71837_LDO_EN,
.owner = THIS_MODULE,
},
{
.name = "ldo5",
.of_match = of_match_ptr("LDO5"),
.regulators_node = of_match_ptr("regulators"),
.id = BD71837_LDO5,
.ops = &bd71837_ldo_regulator_ops,
.type = REGULATOR_VOLTAGE,
.n_voltages = BD71837_LDO5_VOLTAGE_NUM,
.linear_ranges = bd71837_ldo5_voltage_ranges,
.n_linear_ranges = ARRAY_SIZE(bd71837_ldo5_voltage_ranges),
/* LDO5 is supplied by buck6 */
.supply_name = "buck6",
.vsel_reg = BD71837_REG_LDO5_VOLT,
.vsel_mask = LDO5_MASK,
.enable_reg = BD71837_REG_LDO5_VOLT,
.enable_mask = BD71837_LDO_EN,
.owner = THIS_MODULE,
},
{
.name = "ldo6",
.of_match = of_match_ptr("LDO6"),
.regulators_node = of_match_ptr("regulators"),
.id = BD71837_LDO6,
.ops = &bd71837_ldo_regulator_ops,
.type = REGULATOR_VOLTAGE,
.n_voltages = BD71837_LDO6_VOLTAGE_NUM,
.linear_ranges = bd71837_ldo6_voltage_ranges,
.n_linear_ranges = ARRAY_SIZE(bd71837_ldo6_voltage_ranges),
/* LDO6 is supplied by buck7 */
.supply_name = "buck7",
.vsel_reg = BD71837_REG_LDO6_VOLT,
.vsel_mask = LDO6_MASK,
.enable_reg = BD71837_REG_LDO6_VOLT,
.enable_mask = BD71837_LDO_EN,
.owner = THIS_MODULE,
},
{
.name = "ldo7",
.of_match = of_match_ptr("LDO7"),
.regulators_node = of_match_ptr("regulators"),
.id = BD71837_LDO7,
.ops = &bd71837_ldo_regulator_ops,
.type = REGULATOR_VOLTAGE,
.n_voltages = BD71837_LDO7_VOLTAGE_NUM,
.linear_ranges = bd71837_ldo7_voltage_ranges,
.n_linear_ranges = ARRAY_SIZE(bd71837_ldo7_voltage_ranges),
.vsel_reg = BD71837_REG_LDO7_VOLT,
.vsel_mask = LDO7_MASK,
.enable_reg = BD71837_REG_LDO7_VOLT,
.enable_mask = BD71837_LDO_EN,
.owner = THIS_MODULE,
},
};
struct reg_init {
unsigned int reg;
unsigned int mask;
};
static int bd71837_probe(struct platform_device *pdev)
{
struct bd71837_pmic *pmic;
struct regulator_config config = { 0 };
struct reg_init pmic_regulator_inits[] = {
{
.reg = BD71837_REG_BUCK1_CTRL,
.mask = BD71837_BUCK_SEL,
}, {
.reg = BD71837_REG_BUCK2_CTRL,
.mask = BD71837_BUCK_SEL,
}, {
.reg = BD71837_REG_BUCK3_CTRL,
.mask = BD71837_BUCK_SEL,
}, {
.reg = BD71837_REG_BUCK4_CTRL,
.mask = BD71837_BUCK_SEL,
}, {
.reg = BD71837_REG_BUCK5_CTRL,
.mask = BD71837_BUCK_SEL,
}, {
.reg = BD71837_REG_BUCK6_CTRL,
.mask = BD71837_BUCK_SEL,
}, {
.reg = BD71837_REG_BUCK7_CTRL,
.mask = BD71837_BUCK_SEL,
}, {
.reg = BD71837_REG_BUCK8_CTRL,
.mask = BD71837_BUCK_SEL,
}, {
.reg = BD71837_REG_LDO1_VOLT,
.mask = BD71837_LDO_SEL,
}, {
.reg = BD71837_REG_LDO2_VOLT,
.mask = BD71837_LDO_SEL,
}, {
.reg = BD71837_REG_LDO3_VOLT,
.mask = BD71837_LDO_SEL,
}, {
.reg = BD71837_REG_LDO4_VOLT,
.mask = BD71837_LDO_SEL,
}, {
.reg = BD71837_REG_LDO5_VOLT,
.mask = BD71837_LDO_SEL,
}, {
.reg = BD71837_REG_LDO6_VOLT,
.mask = BD71837_LDO_SEL,
}, {
.reg = BD71837_REG_LDO7_VOLT,
.mask = BD71837_LDO_SEL,
}
};
int i, err;
pmic = devm_kzalloc(&pdev->dev, sizeof(*pmic), GFP_KERNEL);
if (!pmic)
return -ENOMEM;
memcpy(pmic->descs, bd71837_regulators, sizeof(pmic->descs));
pmic->pdev = pdev;
pmic->mfd = dev_get_drvdata(pdev->dev.parent);
if (!pmic->mfd) {
dev_err(&pdev->dev, "No MFD driver data\n");
err = -EINVAL;
goto err;
}
platform_set_drvdata(pdev, pmic);
/* Register LOCK release */
err = regmap_update_bits(pmic->mfd->regmap, BD71837_REG_REGLOCK,
(REGLOCK_PWRSEQ | REGLOCK_VREG), 0);
if (err) {
dev_err(&pmic->pdev->dev, "Failed to unlock PMIC (%d)\n", err);
goto err;
} else {
dev_dbg(&pmic->pdev->dev, "Unlocked lock register 0x%x\n",
BD71837_REG_REGLOCK);
}
/*
* There is a HW quirk in BD71837. The shutdown sequence timings for
* bucks/LDOs which are controlled via register interface are changed.
* At PMIC poweroff the voltage for BUCK6/7 is cut immediately at the
* beginning of shut-down sequence. As bucks 6 and 7 are parent
* supplies for LDO5 and LDO6 - this causes LDO5/6 voltage
* monitoring to errorneously detect under voltage and force PMIC to
* emergency state instead of poweroff. In order to avoid this we
* disable voltage monitoring for LDO5 and LDO6
*/
err = regmap_update_bits(pmic->mfd->regmap, BD718XX_REG_MVRFLTMASK2,
BD718XX_LDO5_VRMON80 | BD718XX_LDO6_VRMON80,
BD718XX_LDO5_VRMON80 | BD718XX_LDO6_VRMON80);
if (err) {
dev_err(&pmic->pdev->dev,
"Failed to disable voltage monitoring\n");
goto err;
}
for (i = 0; i < ARRAY_SIZE(pmic_regulator_inits); i++) {
struct regulator_desc *desc;
struct regulator_dev *rdev;
desc = &pmic->descs[i];
config.dev = pdev->dev.parent;
config.driver_data = pmic;
config.regmap = pmic->mfd->regmap;
rdev = devm_regulator_register(&pdev->dev, desc, &config);
if (IS_ERR(rdev)) {
dev_err(pmic->mfd->dev,
"failed to register %s regulator\n",
desc->name);
err = PTR_ERR(rdev);
goto err;
}
/* Regulator register gets the regulator constraints and
* applies them (set_machine_constraints). This should have
* turned the control register(s) to correct values and we
* can now switch the control from PMIC state machine to the
* register interface
*/
err = regmap_update_bits(pmic->mfd->regmap,
pmic_regulator_inits[i].reg,
pmic_regulator_inits[i].mask,
0xFFFFFFFF);
if (err) {
dev_err(&pmic->pdev->dev,
"Failed to write BUCK/LDO SEL bit for (%s)\n",
desc->name);
goto err;
}
pmic->rdev[i] = rdev;
}
err:
return err;
}
static struct platform_driver bd71837_regulator = {
.driver = {
.name = "bd71837-pmic",
},
.probe = bd71837_probe,
};
module_platform_driver(bd71837_regulator);
MODULE_AUTHOR("Matti Vaittinen <matti.vaittinen@fi.rohmeurope.com>");
MODULE_DESCRIPTION("BD71837 voltage regulator driver");
MODULE_LICENSE("GPL");
