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linux/drivers/regulator/bd718x7-regulator.c
Matti Vaittinen fedbfea13c
regulator: bd718x7: Suopport configuring UVP/OVP state 
The ROHM BD71837/47/50/78 do support enabling/disabling the under/over
voltage protection. Add support for enabling/disabling the protection
according to the device-tree information.

Signed-off-by: Matti Vaittinen <matti.vaittinen@fi.rohmeurope.com>
Link: https://lore.kernel.org/r/20210705105416.GA1189560@localhost.localdomain
Signed-off-by: Mark Brown <broonie@kernel.org>
2021-07-11 23:50:44 +01:00

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// SPDX-License-Identifier: GPL-2.0
// Copyright (C) 2018 ROHM Semiconductors
// bd71837-regulator.c ROHM BD71837MWV/BD71847MWV regulator driver
#include <linux/delay.h>
#include <linux/err.h>
#include <linux/interrupt.h>
#include <linux/kernel.h>
#include <linux/mfd/rohm-bd718x7.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/platform_device.h>
#include <linux/regulator/driver.h>
#include <linux/regulator/machine.h>
#include <linux/regulator/of_regulator.h>
#include <linux/slab.h>
/* Typical regulator startup times as per data sheet in uS */
#define BD71847_BUCK1_STARTUP_TIME 144
#define BD71847_BUCK2_STARTUP_TIME 162
#define BD71847_BUCK3_STARTUP_TIME 162
#define BD71847_BUCK4_STARTUP_TIME 240
#define BD71847_BUCK5_STARTUP_TIME 270
#define BD71847_BUCK6_STARTUP_TIME 200
#define BD71847_LDO1_STARTUP_TIME 440
#define BD71847_LDO2_STARTUP_TIME 370
#define BD71847_LDO3_STARTUP_TIME 310
#define BD71847_LDO4_STARTUP_TIME 400
#define BD71847_LDO5_STARTUP_TIME 530
#define BD71847_LDO6_STARTUP_TIME 400
#define BD71837_BUCK1_STARTUP_TIME 160
#define BD71837_BUCK2_STARTUP_TIME 180
#define BD71837_BUCK3_STARTUP_TIME 180
#define BD71837_BUCK4_STARTUP_TIME 180
#define BD71837_BUCK5_STARTUP_TIME 160
#define BD71837_BUCK6_STARTUP_TIME 240
#define BD71837_BUCK7_STARTUP_TIME 220
#define BD71837_BUCK8_STARTUP_TIME 200
#define BD71837_LDO1_STARTUP_TIME 440
#define BD71837_LDO2_STARTUP_TIME 370
#define BD71837_LDO3_STARTUP_TIME 310
#define BD71837_LDO4_STARTUP_TIME 400
#define BD71837_LDO5_STARTUP_TIME 310
#define BD71837_LDO6_STARTUP_TIME 400
#define BD71837_LDO7_STARTUP_TIME 530
/*
* BD718(37/47/50) have two "enable control modes". ON/OFF can either be
* controlled by software - or by PMIC internal HW state machine. Whether
* regulator should be under SW or HW control can be defined from device-tree.
* Let's provide separate ops for regulators to use depending on the "enable
* control mode".
*/
#define BD718XX_HWOPNAME(swopname) swopname##_hwcontrol
#define BD718XX_OPS(name, _list_voltage, _map_voltage, _set_voltage_sel, \
_get_voltage_sel, _set_voltage_time_sel, _set_ramp_delay, \
_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);
}
/*
* On BD71837 (not on BD71847, BD71850, ...)
* Bucks 1 to 4 support DVS. PWM mode is used when voltage is changed.
* Bucks 5 to 8 and LDOs can use PFM and must be disabled when voltage
* is changed. Hence we return -EBUSY for these if voltage is changed
* when BUCK/LDO is enabled.
*
* On BD71847, BD71850, ... The LDO voltage can be changed when LDO is
* enabled. But if voltage is increased the LDO power-good monitoring
* must be disabled for the duration of changing + 1mS to ensure voltage
* has reached the higher level before HW does next under voltage detection
* cycle.
*/
static int bd71837_set_voltage_sel_restricted(struct regulator_dev *rdev,
unsigned int sel)
{
if (rdev->desc->ops->is_enabled(rdev))
return -EBUSY;
return regulator_set_voltage_sel_regmap(rdev, sel);
}
static void voltage_change_done(struct regulator_dev *rdev, unsigned int sel,
unsigned int *mask)
{
int ret;
if (*mask) {
/*
* Let's allow scheduling as we use I2C anyways. We just need to
* guarantee minimum of 1ms sleep - it shouldn't matter if we
* exceed it due to the scheduling.
*/
msleep(1);
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. According to HW colleagues the maximum time
* it takes is 1000us. I assume that on systems with light load
* this might be less - and we could probably use DT to give
* system specific delay value if performance matters.
*
* Well, knowing we use I2C here and can add scheduling delays
* I don't think it is worth the hassle and I just add fixed
* 1ms sleep here (and allow scheduling). If this turns out to
* be a problem we can change it to delay and make the delay
* time configurable.
*/
if (new > now) {
int 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, 0x80, 0x80, 0x80
};
/*
* BD71847 BUCK3
*/
static const struct linear_range bd71847_buck3_volts[] = {
/* Ranges when VOLT_SEL bits are 00 */
REGULATOR_LINEAR_RANGE(700000, 0x00, 0x03, 100000),
REGULATOR_LINEAR_RANGE(1050000, 0x04, 0x05, 50000),
REGULATOR_LINEAR_RANGE(1200000, 0x06, 0x07, 150000),
/* Ranges when VOLT_SEL bits are 01 */
REGULATOR_LINEAR_RANGE(550000, 0x0, 0x7, 50000),
/* Ranges when VOLT_SEL bits are 11 */
REGULATOR_LINEAR_RANGE(675000, 0x0, 0x3, 100000),
REGULATOR_LINEAR_RANGE(1025000, 0x4, 0x5, 50000),
REGULATOR_LINEAR_RANGE(1175000, 0x6, 0x7, 150000),
};
static const unsigned int bd71847_buck3_volt_range_sel[] = {
0x0, 0x0, 0x0, 0x40, 0x80, 0x80, 0x80
};
static const struct linear_range bd71847_buck4_volts[] = {
REGULATOR_LINEAR_RANGE(3000000, 0x00, 0x03, 100000),
REGULATOR_LINEAR_RANGE(2600000, 0x00, 0x03, 100000),
};
static const unsigned int bd71847_buck4_volt_range_sel[] = { 0x0, 0x40 };
/*
* BUCK6
* 3.0V to 3.3V (step 100mV)
*/
static const struct linear_range bd71837_buck6_volts[] = {
REGULATOR_LINEAR_RANGE(3000000, 0x00, 0x03, 100000),
};
/*
* BD71837 BUCK7
* BD71847 BUCK5
* 000 = 1.605V
* 001 = 1.695V
* 010 = 1.755V
* 011 = 1.8V (Initial)
* 100 = 1.845V
* 101 = 1.905V
* 110 = 1.95V
* 111 = 1.995V
*/
static const unsigned int bd718xx_3rd_nodvs_buck_volts[] = {
1605000, 1695000, 1755000, 1800000, 1845000, 1905000, 1950000, 1995000
};
/*
* BUCK8
* 0.8V to 1.40V (step 10mV)
*/
static const struct linear_range bd718xx_4th_nodvs_buck_volts[] = {
REGULATOR_LINEAR_RANGE(800000, 0x00, 0x3C, 10000),
};
/*
* LDO1
* 3.0 to 3.3V (100mV step)
*/
static const struct linear_range bd718xx_ldo1_volts[] = {
REGULATOR_LINEAR_RANGE(3000000, 0x00, 0x03, 100000),
REGULATOR_LINEAR_RANGE(1600000, 0x00, 0x03, 100000),
};
static const unsigned int bd718xx_ldo1_volt_range_sel[] = { 0x0, 0x20 };
/*
* LDO2
* 0.8 or 0.9V
*/
static const unsigned int ldo_2_volts[] = {
900000, 800000
};
/*
* LDO3
* 1.8 to 3.3V (100mV step)
*/
static const struct linear_range bd718xx_ldo3_volts[] = {
REGULATOR_LINEAR_RANGE(1800000, 0x00, 0x0F, 100000),
};
/*
* LDO4
* 0.9 to 1.8V (100mV step)
*/
static const struct linear_range bd718xx_ldo4_volts[] = {
REGULATOR_LINEAR_RANGE(900000, 0x00, 0x09, 100000),
};
/*
* LDO5 for BD71837
* 1.8 to 3.3V (100mV step)
*/
static const struct linear_range bd71837_ldo5_volts[] = {
REGULATOR_LINEAR_RANGE(1800000, 0x00, 0x0F, 100000),
};
/*
* LDO5 for BD71837
* 1.8 to 3.3V (100mV step)
*/
static const struct linear_range bd71847_ldo5_volts[] = {
REGULATOR_LINEAR_RANGE(1800000, 0x00, 0x0F, 100000),
REGULATOR_LINEAR_RANGE(800000, 0x00, 0x0F, 100000),
};
static const unsigned int bd71847_ldo5_volt_range_sel[] = { 0x0, 0x20 };
/*
* LDO6
* 0.9 to 1.8V (100mV step)
*/
static const struct linear_range bd718xx_ldo6_volts[] = {
REGULATOR_LINEAR_RANGE(900000, 0x00, 0x09, 100000),
};
/*
* LDO7
* 1.8 to 3.3V (100mV step)
*/
static const struct linear_range bd71837_ldo7_volts[] = {
REGULATOR_LINEAR_RANGE(1800000, 0x00, 0x0F, 100000),
};
struct reg_init {
unsigned int reg;
unsigned int mask;
unsigned int val;
};
struct bd718xx_regulator_data {
struct regulator_desc desc;
const struct rohm_dvs_config dvs;
const struct reg_init init;
const struct reg_init *additional_inits;
int additional_init_amnt;
};
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, bd71837_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, bd71837_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, bd71837_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, bd71837_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)
{
struct bd718xx_regulator_data *data;
data = container_of(desc, struct bd718xx_regulator_data, desc);
return rohm_regulator_set_dvs_levels(&data->dvs, np, desc, cfg->regmap);
}
static const struct regulator_ops *bd71847_swcontrol_ops[] = {
&bd718xx_dvs_buck_regulator_ops, &bd718xx_dvs_buck_regulator_ops,
&bd718xx_pickable_range_buck_ops, &bd718xx_pickable_range_buck_ops,
&bd718xx_buck_regulator_nolinear_ops, &bd718xx_buck_regulator_ops,
&bd718xx_pickable_range_ldo_ops, &bd718xx_ldo_regulator_nolinear_ops,
&bd718xx_ldo_regulator_ops, &bd718xx_ldo_regulator_ops,
&bd718xx_pickable_range_ldo_ops, &bd718xx_ldo_regulator_ops,
};
static const struct regulator_ops *bd71847_hwcontrol_ops[] = {
&BD718XX_HWOPNAME(bd718xx_dvs_buck_regulator_ops),
&BD718XX_HWOPNAME(bd718xx_dvs_buck_regulator_ops),
&BD718XX_HWOPNAME(bd718xx_pickable_range_buck_ops),
&BD718XX_HWOPNAME(bd718xx_pickable_range_buck_ops),
&BD718XX_HWOPNAME(bd718xx_buck_regulator_nolinear_ops),
&BD718XX_HWOPNAME(bd718xx_buck_regulator_ops),
&BD718XX_HWOPNAME(bd718xx_pickable_range_ldo_ops),
&BD718XX_HWOPNAME(bd718xx_ldo_regulator_nolinear_ops),
&BD718XX_HWOPNAME(bd718xx_ldo_regulator_ops),
&BD718XX_HWOPNAME(bd718xx_ldo_regulator_ops),
&bd718xx_ldo5_ops_hwstate,
&BD718XX_HWOPNAME(bd718xx_ldo_regulator_ops),
};
static struct bd718xx_regulator_data bd71847_regulators[] = {
{
.desc = {
.name = "buck1",
.of_match = of_match_ptr("BUCK1"),
.regulators_node = of_match_ptr("regulators"),
.id = BD718XX_BUCK1,
.type = REGULATOR_VOLTAGE,
.n_voltages = BD718XX_DVS_BUCK_VOLTAGE_NUM,
.linear_ranges = bd718xx_dvs_buck_volts,
.n_linear_ranges =
ARRAY_SIZE(bd718xx_dvs_buck_volts),
.vsel_reg = BD718XX_REG_BUCK1_VOLT_RUN,
.vsel_mask = DVS_BUCK_RUN_MASK,
.enable_reg = BD718XX_REG_BUCK1_CTRL,
.enable_mask = BD718XX_BUCK_EN,
.enable_time = BD71847_BUCK1_STARTUP_TIME,
.owner = THIS_MODULE,
.ramp_delay_table = bd718xx_ramp_delay,
.n_ramp_values = ARRAY_SIZE(bd718xx_ramp_delay),
.ramp_reg = BD718XX_REG_BUCK1_CTRL,
.ramp_mask = BUCK_RAMPRATE_MASK,
.of_parse_cb = buck_set_hw_dvs_levels,
},
.dvs = {
.level_map = ROHM_DVS_LEVEL_RUN | ROHM_DVS_LEVEL_IDLE |
ROHM_DVS_LEVEL_SUSPEND,
.run_reg = BD718XX_REG_BUCK1_VOLT_RUN,
.run_mask = DVS_BUCK_RUN_MASK,
.idle_reg = BD718XX_REG_BUCK1_VOLT_IDLE,
.idle_mask = DVS_BUCK_RUN_MASK,
.suspend_reg = BD718XX_REG_BUCK1_VOLT_SUSP,
.suspend_mask = DVS_BUCK_RUN_MASK,
},
.init = {
.reg = BD718XX_REG_BUCK1_CTRL,
.mask = BD718XX_BUCK_SEL,
.val = BD718XX_BUCK_SEL,
},
},
{
.desc = {
.name = "buck2",
.of_match = of_match_ptr("BUCK2"),
.regulators_node = of_match_ptr("regulators"),
.id = BD718XX_BUCK2,
.type = REGULATOR_VOLTAGE,
.n_voltages = BD718XX_DVS_BUCK_VOLTAGE_NUM,
.linear_ranges = bd718xx_dvs_buck_volts,
.n_linear_ranges = ARRAY_SIZE(bd718xx_dvs_buck_volts),
.vsel_reg = BD718XX_REG_BUCK2_VOLT_RUN,
.vsel_mask = DVS_BUCK_RUN_MASK,
.enable_reg = BD718XX_REG_BUCK2_CTRL,
.enable_mask = BD718XX_BUCK_EN,
.enable_time = BD71847_BUCK2_STARTUP_TIME,
.ramp_delay_table = bd718xx_ramp_delay,
.n_ramp_values = ARRAY_SIZE(bd718xx_ramp_delay),
.ramp_reg = BD718XX_REG_BUCK2_CTRL,
.ramp_mask = BUCK_RAMPRATE_MASK,
.owner = THIS_MODULE,
.of_parse_cb = buck_set_hw_dvs_levels,
},
.dvs = {
.level_map = ROHM_DVS_LEVEL_RUN | ROHM_DVS_LEVEL_IDLE,
.run_reg = BD718XX_REG_BUCK2_VOLT_RUN,
.run_mask = DVS_BUCK_RUN_MASK,
.idle_reg = BD718XX_REG_BUCK2_VOLT_IDLE,
.idle_mask = DVS_BUCK_RUN_MASK,
},
.init = {
.reg = BD718XX_REG_BUCK2_CTRL,
.mask = BD718XX_BUCK_SEL,
.val = BD718XX_BUCK_SEL,
},
},
{
.desc = {
.name = "buck3",
.of_match = of_match_ptr("BUCK3"),
.regulators_node = of_match_ptr("regulators"),
.id = BD718XX_BUCK3,
.type = REGULATOR_VOLTAGE,
.n_voltages = BD71847_BUCK3_VOLTAGE_NUM,
.linear_ranges = bd71847_buck3_volts,
.n_linear_ranges =
ARRAY_SIZE(bd71847_buck3_volts),
.vsel_reg = BD718XX_REG_1ST_NODVS_BUCK_VOLT,
.vsel_mask = BD718XX_1ST_NODVS_BUCK_MASK,
.vsel_range_reg = BD718XX_REG_1ST_NODVS_BUCK_VOLT,
.vsel_range_mask = BD71847_BUCK3_RANGE_MASK,
.linear_range_selectors = bd71847_buck3_volt_range_sel,
.enable_reg = BD718XX_REG_1ST_NODVS_BUCK_CTRL,
.enable_mask = BD718XX_BUCK_EN,
.enable_time = BD71847_BUCK3_STARTUP_TIME,
.owner = THIS_MODULE,
},
.init = {
.reg = BD718XX_REG_1ST_NODVS_BUCK_CTRL,
.mask = BD718XX_BUCK_SEL,
.val = BD718XX_BUCK_SEL,
},
},
{
.desc = {
.name = "buck4",
.of_match = of_match_ptr("BUCK4"),
.regulators_node = of_match_ptr("regulators"),
.id = BD718XX_BUCK4,
.type = REGULATOR_VOLTAGE,
.n_voltages = BD71847_BUCK4_VOLTAGE_NUM,
.linear_ranges = bd71847_buck4_volts,
.n_linear_ranges =
ARRAY_SIZE(bd71847_buck4_volts),
.enable_reg = BD718XX_REG_2ND_NODVS_BUCK_CTRL,
.vsel_reg = BD718XX_REG_2ND_NODVS_BUCK_VOLT,
.vsel_mask = BD71847_BUCK4_MASK,
.vsel_range_reg = BD718XX_REG_2ND_NODVS_BUCK_VOLT,
.vsel_range_mask = BD71847_BUCK4_RANGE_MASK,
.linear_range_selectors = bd71847_buck4_volt_range_sel,
.enable_mask = BD718XX_BUCK_EN,
.enable_time = BD71847_BUCK4_STARTUP_TIME,
.owner = THIS_MODULE,
},
.init = {
.reg = BD718XX_REG_2ND_NODVS_BUCK_CTRL,
.mask = BD718XX_BUCK_SEL,
.val = BD718XX_BUCK_SEL,
},
},
{
.desc = {
.name = "buck5",
.of_match = of_match_ptr("BUCK5"),
.regulators_node = of_match_ptr("regulators"),
.id = BD718XX_BUCK5,
.type = REGULATOR_VOLTAGE,
.volt_table = &bd718xx_3rd_nodvs_buck_volts[0],
.n_voltages = ARRAY_SIZE(bd718xx_3rd_nodvs_buck_volts),
.vsel_reg = BD718XX_REG_3RD_NODVS_BUCK_VOLT,
.vsel_mask = BD718XX_3RD_NODVS_BUCK_MASK,
.enable_reg = BD718XX_REG_3RD_NODVS_BUCK_CTRL,
.enable_mask = BD718XX_BUCK_EN,
.enable_time = BD71847_BUCK5_STARTUP_TIME,
.owner = THIS_MODULE,
},
.init = {
.reg = BD718XX_REG_3RD_NODVS_BUCK_CTRL,
.mask = BD718XX_BUCK_SEL,
.val = BD718XX_BUCK_SEL,
},
},
{
.desc = {
.name = "buck6",
.of_match = of_match_ptr("BUCK6"),
.regulators_node = of_match_ptr("regulators"),
.id = BD718XX_BUCK6,
.type = REGULATOR_VOLTAGE,
.n_voltages = BD718XX_4TH_NODVS_BUCK_VOLTAGE_NUM,
.linear_ranges = bd718xx_4th_nodvs_buck_volts,
.n_linear_ranges =
ARRAY_SIZE(bd718xx_4th_nodvs_buck_volts),
.vsel_reg = BD718XX_REG_4TH_NODVS_BUCK_VOLT,
.vsel_mask = BD718XX_4TH_NODVS_BUCK_MASK,
.enable_reg = BD718XX_REG_4TH_NODVS_BUCK_CTRL,
.enable_mask = BD718XX_BUCK_EN,
.enable_time = BD71847_BUCK6_STARTUP_TIME,
.owner = THIS_MODULE,
},
.init = {
.reg = BD718XX_REG_4TH_NODVS_BUCK_CTRL,
.mask = BD718XX_BUCK_SEL,
.val = BD718XX_BUCK_SEL,
},
},
{
.desc = {
.name = "ldo1",
.of_match = of_match_ptr("LDO1"),
.regulators_node = of_match_ptr("regulators"),
.id = BD718XX_LDO1,
.type = REGULATOR_VOLTAGE,
.n_voltages = BD718XX_LDO1_VOLTAGE_NUM,
.linear_ranges = bd718xx_ldo1_volts,
.n_linear_ranges = ARRAY_SIZE(bd718xx_ldo1_volts),
.vsel_reg = BD718XX_REG_LDO1_VOLT,
.vsel_mask = BD718XX_LDO1_MASK,
.vsel_range_reg = BD718XX_REG_LDO1_VOLT,
.vsel_range_mask = BD718XX_LDO1_RANGE_MASK,
.linear_range_selectors = bd718xx_ldo1_volt_range_sel,
.enable_reg = BD718XX_REG_LDO1_VOLT,
.enable_mask = BD718XX_LDO_EN,
.enable_time = BD71847_LDO1_STARTUP_TIME,
.owner = THIS_MODULE,
},
.init = {
.reg = BD718XX_REG_LDO1_VOLT,
.mask = BD718XX_LDO_SEL,
.val = BD718XX_LDO_SEL,
},
},
{
.desc = {
.name = "ldo2",
.of_match = of_match_ptr("LDO2"),
.regulators_node = of_match_ptr("regulators"),
.id = BD718XX_LDO2,
.type = REGULATOR_VOLTAGE,
.volt_table = &ldo_2_volts[0],
.vsel_reg = BD718XX_REG_LDO2_VOLT,
.vsel_mask = BD718XX_LDO2_MASK,
.n_voltages = ARRAY_SIZE(ldo_2_volts),
.enable_reg = BD718XX_REG_LDO2_VOLT,
.enable_mask = BD718XX_LDO_EN,
.enable_time = BD71847_LDO2_STARTUP_TIME,
.owner = THIS_MODULE,
},
.init = {
.reg = BD718XX_REG_LDO2_VOLT,
.mask = BD718XX_LDO_SEL,
.val = BD718XX_LDO_SEL,
},
},
{
.desc = {
.name = "ldo3",
.of_match = of_match_ptr("LDO3"),
.regulators_node = of_match_ptr("regulators"),
.id = BD718XX_LDO3,
.type = REGULATOR_VOLTAGE,
.n_voltages = BD718XX_LDO3_VOLTAGE_NUM,
.linear_ranges = bd718xx_ldo3_volts,
.n_linear_ranges = ARRAY_SIZE(bd718xx_ldo3_volts),
.vsel_reg = BD718XX_REG_LDO3_VOLT,
.vsel_mask = BD718XX_LDO3_MASK,
.enable_reg = BD718XX_REG_LDO3_VOLT,
.enable_mask = BD718XX_LDO_EN,
.enable_time = BD71847_LDO3_STARTUP_TIME,
.owner = THIS_MODULE,
},
.init = {
.reg = BD718XX_REG_LDO3_VOLT,
.mask = BD718XX_LDO_SEL,
.val = BD718XX_LDO_SEL,
},
},
{
.desc = {
.name = "ldo4",
.of_match = of_match_ptr("LDO4"),
.regulators_node = of_match_ptr("regulators"),
.id = BD718XX_LDO4,
.type = REGULATOR_VOLTAGE,
.n_voltages = BD718XX_LDO4_VOLTAGE_NUM,
.linear_ranges = bd718xx_ldo4_volts,
.n_linear_ranges = ARRAY_SIZE(bd718xx_ldo4_volts),
.vsel_reg = BD718XX_REG_LDO4_VOLT,
.vsel_mask = BD718XX_LDO4_MASK,
.enable_reg = BD718XX_REG_LDO4_VOLT,
.enable_mask = BD718XX_LDO_EN,
.enable_time = BD71847_LDO4_STARTUP_TIME,
.owner = THIS_MODULE,
},
.init = {
.reg = BD718XX_REG_LDO4_VOLT,
.mask = BD718XX_LDO_SEL,
.val = BD718XX_LDO_SEL,
},
},
{
.desc = {
.name = "ldo5",
.of_match = of_match_ptr("LDO5"),
.regulators_node = of_match_ptr("regulators"),
.id = BD718XX_LDO5,
.type = REGULATOR_VOLTAGE,
.n_voltages = BD71847_LDO5_VOLTAGE_NUM,
.linear_ranges = bd71847_ldo5_volts,
.n_linear_ranges = ARRAY_SIZE(bd71847_ldo5_volts),
.vsel_reg = BD718XX_REG_LDO5_VOLT,
.vsel_mask = BD71847_LDO5_MASK,
.vsel_range_reg = BD718XX_REG_LDO5_VOLT,
.vsel_range_mask = BD71847_LDO5_RANGE_MASK,
.linear_range_selectors = bd71847_ldo5_volt_range_sel,
.enable_reg = BD718XX_REG_LDO5_VOLT,
.enable_mask = BD718XX_LDO_EN,
.enable_time = BD71847_LDO5_STARTUP_TIME,
.owner = THIS_MODULE,
},
.init = {
.reg = BD718XX_REG_LDO5_VOLT,
.mask = BD718XX_LDO_SEL,
.val = BD718XX_LDO_SEL,
},
},
{
.desc = {
.name = "ldo6",
.of_match = of_match_ptr("LDO6"),
.regulators_node = of_match_ptr("regulators"),
.id = BD718XX_LDO6,
.type = REGULATOR_VOLTAGE,
.n_voltages = BD718XX_LDO6_VOLTAGE_NUM,
.linear_ranges = bd718xx_ldo6_volts,
.n_linear_ranges = ARRAY_SIZE(bd718xx_ldo6_volts),
/* LDO6 is supplied by buck5 */
.supply_name = "buck5",
.vsel_reg = BD718XX_REG_LDO6_VOLT,
.vsel_mask = BD718XX_LDO6_MASK,
.enable_reg = BD718XX_REG_LDO6_VOLT,
.enable_mask = BD718XX_LDO_EN,
.enable_time = BD71847_LDO6_STARTUP_TIME,
.owner = THIS_MODULE,
},
.init = {
.reg = BD718XX_REG_LDO6_VOLT,
.mask = BD718XX_LDO_SEL,
.val = BD718XX_LDO_SEL,
},
},
};
static const struct regulator_ops *bd71837_swcontrol_ops[] = {
&bd718xx_dvs_buck_regulator_ops, &bd718xx_dvs_buck_regulator_ops,
&bd718xx_dvs_buck_regulator_ops, &bd718xx_dvs_buck_regulator_ops,
&bd71837_pickable_range_buck_ops, &bd71837_buck_regulator_ops,
&bd71837_buck_regulator_nolinear_ops, &bd71837_buck_regulator_ops,
&bd71837_pickable_range_ldo_ops, &bd71837_ldo_regulator_nolinear_ops,
&bd71837_ldo_regulator_ops, &bd71837_ldo_regulator_ops,
&bd71837_ldo_regulator_ops, &bd71837_ldo_regulator_ops,
&bd71837_ldo_regulator_ops,
};
static const struct regulator_ops *bd71837_hwcontrol_ops[] = {
&BD718XX_HWOPNAME(bd718xx_dvs_buck_regulator_ops),
&BD718XX_HWOPNAME(bd718xx_dvs_buck_regulator_ops),
&bd71837_buck34_ops_hwctrl, &bd71837_buck34_ops_hwctrl,
&BD718XX_HWOPNAME(bd71837_pickable_range_buck_ops),
&BD718XX_HWOPNAME(bd71837_buck_regulator_ops),
&BD718XX_HWOPNAME(bd71837_buck_regulator_nolinear_ops),
&BD718XX_HWOPNAME(bd71837_buck_regulator_ops),
&BD718XX_HWOPNAME(bd71837_pickable_range_ldo_ops),
&BD718XX_HWOPNAME(bd71837_ldo_regulator_nolinear_ops),
&BD718XX_HWOPNAME(bd71837_ldo_regulator_ops),
&BD718XX_HWOPNAME(bd71837_ldo_regulator_ops),
&BD718XX_HWOPNAME(bd71837_ldo_regulator_ops),
&BD718XX_HWOPNAME(bd71837_ldo_regulator_ops),
&BD718XX_HWOPNAME(bd71837_ldo_regulator_ops),
};
static struct bd718xx_regulator_data bd71837_regulators[] = {
{
.desc = {
.name = "buck1",
.of_match = of_match_ptr("BUCK1"),
.regulators_node = of_match_ptr("regulators"),
.id = BD718XX_BUCK1,
.type = REGULATOR_VOLTAGE,
.n_voltages = BD718XX_DVS_BUCK_VOLTAGE_NUM,
.linear_ranges = bd718xx_dvs_buck_volts,
.n_linear_ranges = ARRAY_SIZE(bd718xx_dvs_buck_volts),
.vsel_reg = BD718XX_REG_BUCK1_VOLT_RUN,
.vsel_mask = DVS_BUCK_RUN_MASK,
.enable_reg = BD718XX_REG_BUCK1_CTRL,
.enable_mask = BD718XX_BUCK_EN,
.enable_time = BD71837_BUCK1_STARTUP_TIME,
.ramp_delay_table = bd718xx_ramp_delay,
.n_ramp_values = ARRAY_SIZE(bd718xx_ramp_delay),
.ramp_reg = BD718XX_REG_BUCK1_CTRL,
.ramp_mask = BUCK_RAMPRATE_MASK,
.owner = THIS_MODULE,
.of_parse_cb = buck_set_hw_dvs_levels,
},
.dvs = {
.level_map = ROHM_DVS_LEVEL_RUN | ROHM_DVS_LEVEL_IDLE |
ROHM_DVS_LEVEL_SUSPEND,
.run_reg = BD718XX_REG_BUCK1_VOLT_RUN,
.run_mask = DVS_BUCK_RUN_MASK,
.idle_reg = BD718XX_REG_BUCK1_VOLT_IDLE,
.idle_mask = DVS_BUCK_RUN_MASK,
.suspend_reg = BD718XX_REG_BUCK1_VOLT_SUSP,
.suspend_mask = DVS_BUCK_RUN_MASK,
},
.init = {
.reg = BD718XX_REG_BUCK1_CTRL,
.mask = BD718XX_BUCK_SEL,
.val = BD718XX_BUCK_SEL,
},
},
{
.desc = {
.name = "buck2",
.of_match = of_match_ptr("BUCK2"),
.regulators_node = of_match_ptr("regulators"),
.id = BD718XX_BUCK2,
.type = REGULATOR_VOLTAGE,
.n_voltages = BD718XX_DVS_BUCK_VOLTAGE_NUM,
.linear_ranges = bd718xx_dvs_buck_volts,
.n_linear_ranges = ARRAY_SIZE(bd718xx_dvs_buck_volts),
.vsel_reg = BD718XX_REG_BUCK2_VOLT_RUN,
.vsel_mask = DVS_BUCK_RUN_MASK,
.enable_reg = BD718XX_REG_BUCK2_CTRL,
.enable_mask = BD718XX_BUCK_EN,
.enable_time = BD71837_BUCK2_STARTUP_TIME,
.ramp_delay_table = bd718xx_ramp_delay,
.n_ramp_values = ARRAY_SIZE(bd718xx_ramp_delay),
.ramp_reg = BD718XX_REG_BUCK2_CTRL,
.ramp_mask = BUCK_RAMPRATE_MASK,
.owner = THIS_MODULE,
.of_parse_cb = buck_set_hw_dvs_levels,
},
.dvs = {
.level_map = ROHM_DVS_LEVEL_RUN | ROHM_DVS_LEVEL_IDLE,
.run_reg = BD718XX_REG_BUCK2_VOLT_RUN,
.run_mask = DVS_BUCK_RUN_MASK,
.idle_reg = BD718XX_REG_BUCK2_VOLT_IDLE,
.idle_mask = DVS_BUCK_RUN_MASK,
},
.init = {
.reg = BD718XX_REG_BUCK2_CTRL,
.mask = BD718XX_BUCK_SEL,
.val = BD718XX_BUCK_SEL,
},
},
{
.desc = {
.name = "buck3",
.of_match = of_match_ptr("BUCK3"),
.regulators_node = of_match_ptr("regulators"),
.id = BD718XX_BUCK3,
.type = REGULATOR_VOLTAGE,
.n_voltages = BD718XX_DVS_BUCK_VOLTAGE_NUM,
.linear_ranges = bd718xx_dvs_buck_volts,
.n_linear_ranges = ARRAY_SIZE(bd718xx_dvs_buck_volts),
.vsel_reg = BD71837_REG_BUCK3_VOLT_RUN,
.vsel_mask = DVS_BUCK_RUN_MASK,
.enable_reg = BD71837_REG_BUCK3_CTRL,
.enable_mask = BD718XX_BUCK_EN,
.enable_time = BD71837_BUCK3_STARTUP_TIME,
.ramp_delay_table = bd718xx_ramp_delay,
.n_ramp_values = ARRAY_SIZE(bd718xx_ramp_delay),
.ramp_reg = BD71837_REG_BUCK3_CTRL,
.ramp_mask = BUCK_RAMPRATE_MASK,
.owner = THIS_MODULE,
.of_parse_cb = buck_set_hw_dvs_levels,
},
.dvs = {
.level_map = ROHM_DVS_LEVEL_RUN,
.run_reg = BD71837_REG_BUCK3_VOLT_RUN,
.run_mask = DVS_BUCK_RUN_MASK,
},
.init = {
.reg = BD71837_REG_BUCK3_CTRL,
.mask = BD718XX_BUCK_SEL,
.val = BD718XX_BUCK_SEL,
},
},
{
.desc = {
.name = "buck4",
.of_match = of_match_ptr("BUCK4"),
.regulators_node = of_match_ptr("regulators"),
.id = BD718XX_BUCK4,
.type = REGULATOR_VOLTAGE,
.n_voltages = BD718XX_DVS_BUCK_VOLTAGE_NUM,
.linear_ranges = bd718xx_dvs_buck_volts,
.n_linear_ranges = ARRAY_SIZE(bd718xx_dvs_buck_volts),
.vsel_reg = BD71837_REG_BUCK4_VOLT_RUN,
.vsel_mask = DVS_BUCK_RUN_MASK,
.enable_reg = BD71837_REG_BUCK4_CTRL,
.enable_mask = BD718XX_BUCK_EN,
.enable_time = BD71837_BUCK4_STARTUP_TIME,
.ramp_delay_table = bd718xx_ramp_delay,
.n_ramp_values = ARRAY_SIZE(bd718xx_ramp_delay),
.ramp_reg = BD71837_REG_BUCK4_CTRL,
.ramp_mask = BUCK_RAMPRATE_MASK,
.owner = THIS_MODULE,
.of_parse_cb = buck_set_hw_dvs_levels,
},
.dvs = {
.level_map = ROHM_DVS_LEVEL_RUN,
.run_reg = BD71837_REG_BUCK4_VOLT_RUN,
.run_mask = DVS_BUCK_RUN_MASK,
},
.init = {
.reg = BD71837_REG_BUCK4_CTRL,
.mask = BD718XX_BUCK_SEL,
.val = BD718XX_BUCK_SEL,
},
},
{
.desc = {
.name = "buck5",
.of_match = of_match_ptr("BUCK5"),
.regulators_node = of_match_ptr("regulators"),
.id = BD718XX_BUCK5,
.type = REGULATOR_VOLTAGE,
.n_voltages = BD71837_BUCK5_VOLTAGE_NUM,
.linear_ranges = bd71837_buck5_volts,
.n_linear_ranges =
ARRAY_SIZE(bd71837_buck5_volts),
.vsel_reg = BD718XX_REG_1ST_NODVS_BUCK_VOLT,
.vsel_mask = BD71837_BUCK5_MASK,
.vsel_range_reg = BD718XX_REG_1ST_NODVS_BUCK_VOLT,
.vsel_range_mask = BD71837_BUCK5_RANGE_MASK,
.linear_range_selectors = bd71837_buck5_volt_range_sel,
.enable_reg = BD718XX_REG_1ST_NODVS_BUCK_CTRL,
.enable_mask = BD718XX_BUCK_EN,
.enable_time = BD71837_BUCK5_STARTUP_TIME,
.owner = THIS_MODULE,
},
.init = {
.reg = BD718XX_REG_1ST_NODVS_BUCK_CTRL,
.mask = BD718XX_BUCK_SEL,
.val = BD718XX_BUCK_SEL,
},
},
{
.desc = {
.name = "buck6",
.of_match = of_match_ptr("BUCK6"),
.regulators_node = of_match_ptr("regulators"),
.id = BD718XX_BUCK6,
.type = REGULATOR_VOLTAGE,
.n_voltages = BD71837_BUCK6_VOLTAGE_NUM,
.linear_ranges = bd71837_buck6_volts,
.n_linear_ranges =
ARRAY_SIZE(bd71837_buck6_volts),
.vsel_reg = BD718XX_REG_2ND_NODVS_BUCK_VOLT,
.vsel_mask = BD71837_BUCK6_MASK,
.enable_reg = BD718XX_REG_2ND_NODVS_BUCK_CTRL,
.enable_mask = BD718XX_BUCK_EN,
.enable_time = BD71837_BUCK6_STARTUP_TIME,
.owner = THIS_MODULE,
},
.init = {
.reg = BD718XX_REG_2ND_NODVS_BUCK_CTRL,
.mask = BD718XX_BUCK_SEL,
.val = BD718XX_BUCK_SEL,
},
},
{
.desc = {
.name = "buck7",
.of_match = of_match_ptr("BUCK7"),
.regulators_node = of_match_ptr("regulators"),
.id = BD718XX_BUCK7,
.type = REGULATOR_VOLTAGE,
.volt_table = &bd718xx_3rd_nodvs_buck_volts[0],
.n_voltages = ARRAY_SIZE(bd718xx_3rd_nodvs_buck_volts),
.vsel_reg = BD718XX_REG_3RD_NODVS_BUCK_VOLT,
.vsel_mask = BD718XX_3RD_NODVS_BUCK_MASK,
.enable_reg = BD718XX_REG_3RD_NODVS_BUCK_CTRL,
.enable_mask = BD718XX_BUCK_EN,
.enable_time = BD71837_BUCK7_STARTUP_TIME,
.owner = THIS_MODULE,
},
.init = {
.reg = BD718XX_REG_3RD_NODVS_BUCK_CTRL,
.mask = BD718XX_BUCK_SEL,
.val = BD718XX_BUCK_SEL,
},
},
{
.desc = {
.name = "buck8",
.of_match = of_match_ptr("BUCK8"),
.regulators_node = of_match_ptr("regulators"),
.id = BD718XX_BUCK8,
.type = REGULATOR_VOLTAGE,
.n_voltages = BD718XX_4TH_NODVS_BUCK_VOLTAGE_NUM,
.linear_ranges = bd718xx_4th_nodvs_buck_volts,
.n_linear_ranges =
ARRAY_SIZE(bd718xx_4th_nodvs_buck_volts),
.vsel_reg = BD718XX_REG_4TH_NODVS_BUCK_VOLT,
.vsel_mask = BD718XX_4TH_NODVS_BUCK_MASK,
.enable_reg = BD718XX_REG_4TH_NODVS_BUCK_CTRL,
.enable_mask = BD718XX_BUCK_EN,
.enable_time = BD71837_BUCK8_STARTUP_TIME,
.owner = THIS_MODULE,
},
.init = {
.reg = BD718XX_REG_4TH_NODVS_BUCK_CTRL,
.mask = BD718XX_BUCK_SEL,
.val = BD718XX_BUCK_SEL,
},
},
{
.desc = {
.name = "ldo1",
.of_match = of_match_ptr("LDO1"),
.regulators_node = of_match_ptr("regulators"),
.id = BD718XX_LDO1,
.type = REGULATOR_VOLTAGE,
.n_voltages = BD718XX_LDO1_VOLTAGE_NUM,
.linear_ranges = bd718xx_ldo1_volts,
.n_linear_ranges = ARRAY_SIZE(bd718xx_ldo1_volts),
.vsel_reg = BD718XX_REG_LDO1_VOLT,
.vsel_mask = BD718XX_LDO1_MASK,
.vsel_range_reg = BD718XX_REG_LDO1_VOLT,
.vsel_range_mask = BD718XX_LDO1_RANGE_MASK,
.linear_range_selectors = bd718xx_ldo1_volt_range_sel,
.enable_reg = BD718XX_REG_LDO1_VOLT,
.enable_mask = BD718XX_LDO_EN,
.enable_time = BD71837_LDO1_STARTUP_TIME,
.owner = THIS_MODULE,
},
.init = {
.reg = BD718XX_REG_LDO1_VOLT,
.mask = BD718XX_LDO_SEL,
.val = BD718XX_LDO_SEL,
},
},
{
.desc = {
.name = "ldo2",
.of_match = of_match_ptr("LDO2"),
.regulators_node = of_match_ptr("regulators"),
.id = BD718XX_LDO2,
.type = REGULATOR_VOLTAGE,
.volt_table = &ldo_2_volts[0],
.vsel_reg = BD718XX_REG_LDO2_VOLT,
.vsel_mask = BD718XX_LDO2_MASK,
.n_voltages = ARRAY_SIZE(ldo_2_volts),
.enable_reg = BD718XX_REG_LDO2_VOLT,
.enable_mask = BD718XX_LDO_EN,
.enable_time = BD71837_LDO2_STARTUP_TIME,
.owner = THIS_MODULE,
},
.init = {
.reg = BD718XX_REG_LDO2_VOLT,
.mask = BD718XX_LDO_SEL,
.val = BD718XX_LDO_SEL,
},
},
{
.desc = {
.name = "ldo3",
.of_match = of_match_ptr("LDO3"),
.regulators_node = of_match_ptr("regulators"),
.id = BD718XX_LDO3,
.type = REGULATOR_VOLTAGE,
.n_voltages = BD718XX_LDO3_VOLTAGE_NUM,
.linear_ranges = bd718xx_ldo3_volts,
.n_linear_ranges = ARRAY_SIZE(bd718xx_ldo3_volts),
.vsel_reg = BD718XX_REG_LDO3_VOLT,
.vsel_mask = BD718XX_LDO3_MASK,
.enable_reg = BD718XX_REG_LDO3_VOLT,
.enable_mask = BD718XX_LDO_EN,
.enable_time = BD71837_LDO3_STARTUP_TIME,
.owner = THIS_MODULE,
},
.init = {
.reg = BD718XX_REG_LDO3_VOLT,
.mask = BD718XX_LDO_SEL,
.val = BD718XX_LDO_SEL,
},
},
{
.desc = {
.name = "ldo4",
.of_match = of_match_ptr("LDO4"),
.regulators_node = of_match_ptr("regulators"),
.id = BD718XX_LDO4,
.type = REGULATOR_VOLTAGE,
.n_voltages = BD718XX_LDO4_VOLTAGE_NUM,
.linear_ranges = bd718xx_ldo4_volts,
.n_linear_ranges = ARRAY_SIZE(bd718xx_ldo4_volts),
.vsel_reg = BD718XX_REG_LDO4_VOLT,
.vsel_mask = BD718XX_LDO4_MASK,
.enable_reg = BD718XX_REG_LDO4_VOLT,
.enable_mask = BD718XX_LDO_EN,
.enable_time = BD71837_LDO4_STARTUP_TIME,
.owner = THIS_MODULE,
},
.init = {
.reg = BD718XX_REG_LDO4_VOLT,
.mask = BD718XX_LDO_SEL,
.val = BD718XX_LDO_SEL,
},
},
{
.desc = {
.name = "ldo5",
.of_match = of_match_ptr("LDO5"),
.regulators_node = of_match_ptr("regulators"),
.id = BD718XX_LDO5,
.type = REGULATOR_VOLTAGE,
.n_voltages = BD71837_LDO5_VOLTAGE_NUM,
.linear_ranges = bd71837_ldo5_volts,
.n_linear_ranges = ARRAY_SIZE(bd71837_ldo5_volts),
/* LDO5 is supplied by buck6 */
.supply_name = "buck6",
.vsel_reg = BD718XX_REG_LDO5_VOLT,
.vsel_mask = BD71837_LDO5_MASK,
.enable_reg = BD718XX_REG_LDO5_VOLT,
.enable_mask = BD718XX_LDO_EN,
.enable_time = BD71837_LDO5_STARTUP_TIME,
.owner = THIS_MODULE,
},
.init = {
.reg = BD718XX_REG_LDO5_VOLT,
.mask = BD718XX_LDO_SEL,
.val = BD718XX_LDO_SEL,
},
.additional_inits = bd71837_ldo5_inits,
.additional_init_amnt = ARRAY_SIZE(bd71837_ldo5_inits),
},
{
.desc = {
.name = "ldo6",
.of_match = of_match_ptr("LDO6"),
.regulators_node = of_match_ptr("regulators"),
.id = BD718XX_LDO6,
.type = REGULATOR_VOLTAGE,
.n_voltages = BD718XX_LDO6_VOLTAGE_NUM,
.linear_ranges = bd718xx_ldo6_volts,
.n_linear_ranges = ARRAY_SIZE(bd718xx_ldo6_volts),
/* LDO6 is supplied by buck7 */
.supply_name = "buck7",
.vsel_reg = BD718XX_REG_LDO6_VOLT,
.vsel_mask = BD718XX_LDO6_MASK,
.enable_reg = BD718XX_REG_LDO6_VOLT,
.enable_mask = BD718XX_LDO_EN,
.enable_time = BD71837_LDO6_STARTUP_TIME,
.owner = THIS_MODULE,
},
.init = {
.reg = BD718XX_REG_LDO6_VOLT,
.mask = BD718XX_LDO_SEL,
.val = BD718XX_LDO_SEL,
},
.additional_inits = bd71837_ldo6_inits,
.additional_init_amnt = ARRAY_SIZE(bd71837_ldo6_inits),
},
{
.desc = {
.name = "ldo7",
.of_match = of_match_ptr("LDO7"),
.regulators_node = of_match_ptr("regulators"),
.id = BD718XX_LDO7,
.type = REGULATOR_VOLTAGE,
.n_voltages = BD71837_LDO7_VOLTAGE_NUM,
.linear_ranges = bd71837_ldo7_volts,
.n_linear_ranges = ARRAY_SIZE(bd71837_ldo7_volts),
.vsel_reg = BD71837_REG_LDO7_VOLT,
.vsel_mask = BD71837_LDO7_MASK,
.enable_reg = BD71837_REG_LDO7_VOLT,
.enable_mask = BD718XX_LDO_EN,
.enable_time = BD71837_LDO7_STARTUP_TIME,
.owner = THIS_MODULE,
},
.init = {
.reg = BD71837_REG_LDO7_VOLT,
.mask = BD718XX_LDO_SEL,
.val = BD718XX_LDO_SEL,
},
},
};
static void mark_hw_controlled(struct device *dev, struct device_node *np,
struct bd718xx_regulator_data *reg_data,
unsigned int num_reg_data, int *info)
{
int i;
for (i = 1; i <= num_reg_data; i++) {
if (!of_node_name_eq(np, reg_data[i-1].desc.of_match))
continue;
*info |= 1 << (i - 1);
dev_dbg(dev, "regulator %d runlevel controlled\n", i);
return;
}
dev_warn(dev, "Bad regulator node\n");
}
/*
* Setups where regulator (especially the buck8) output voltage is scaled
* by adding external connection where some other regulator output is connected
* to feedback-pin (over suitable resistors) is getting popular amongst users
* of BD71837. (This allows for example scaling down the buck8 voltages to suit
* lover GPU voltages for projects where buck8 is (ab)used to supply power
* for GPU. Additionally some setups do allow DVS for buck8 but as this do
* produce voltage spikes the HW must be evaluated to be able to survive this
* - hence I keep the DVS disabled for non DVS bucks by default. I don't want
* to help you burn your proto board)
*
* So we allow describing this external connection from DT and scale the
* voltages accordingly. This is what the connection should look like:
*
* |------------|
* | buck 8 |-------+----->Vout
* | | |
* |------------| |
* | FB pin |
* | |
* +-------+--R2---+
* |
* R1
* |
* V FB-pull-up
*
* Here the buck output is sifted according to formula:
*
* Vout_o = Vo - (Vpu - Vo)*R2/R1
* Linear_step = step_orig*(R1+R2)/R1
*
* where:
* Vout_o is adjusted voltage output at vsel reg value 0
* Vo is original voltage output at vsel reg value 0
* Vpu is the pull-up voltage V FB-pull-up in the picture
* R1 and R2 are resistor values.
*
* As a real world example for buck8 and a specific GPU:
* VLDO = 1.6V (used as FB-pull-up)
* R1 = 1000ohms
* R2 = 150ohms
* VSEL 0x0 => 0.8V – (VLDO – 0.8) * R2 / R1 = 0.68V
* Linear Step = 10mV * (R1 + R2) / R1 = 11.5mV
*/
static int setup_feedback_loop(struct device *dev, struct device_node *np,
struct bd718xx_regulator_data *reg_data,
unsigned int num_reg_data, int fb_uv)
{
int i, r1, r2, ret;
/*
* We do adjust the values in the global desc based on DT settings.
* This may not be best approach as it can cause problems if more than
* one PMIC is controlled from same processor. I don't see such use-case
* for BD718x7 now - so we spare some bits.
*
* If this will point out to be a problem - then we can allocate new
* bd718xx_regulator_data array at probe and just use the global
* array as a template where we copy initial values. Then we can
* use allocated descs for regultor registration and do IC specific
* modifications to this copy while leaving other PMICs untouched. But
* that means allocating new array for each PMIC - and currently I see
* no need for that.
*/
for (i = 0; i < num_reg_data; i++) {
struct regulator_desc *desc = &reg_data[i].desc;
int j;
if (!of_node_name_eq(np, desc->of_match))
continue;
pr_info("Looking at node '%s'\n", desc->of_match);
/* The feedback loop connection does not make sense for LDOs */
if (desc->id >= BD718XX_LDO1)
return -EINVAL;
ret = of_property_read_u32(np, "rohm,feedback-pull-up-r1-ohms",
&r1);
if (ret)
return ret;
if (!r1)
return -EINVAL;
ret = of_property_read_u32(np, "rohm,feedback-pull-up-r2-ohms",
&r2);
if (ret)
return ret;
if (desc->n_linear_ranges && desc->linear_ranges) {
struct linear_range *new;
new = devm_kzalloc(dev, desc->n_linear_ranges *
sizeof(struct linear_range),
GFP_KERNEL);
if (!new)
return -ENOMEM;
for (j = 0; j < desc->n_linear_ranges; j++) {
int min = desc->linear_ranges[j].min;
int step = desc->linear_ranges[j].step;
min -= (fb_uv - min)*r2/r1;
step = step * (r1 + r2);
step /= r1;
new[j].min = min;
new[j].step = step;
dev_dbg(dev, "%s: old range min %d, step %d\n",
desc->name, desc->linear_ranges[j].min,
desc->linear_ranges[j].step);
dev_dbg(dev, "new range min %d, step %d\n", min,
step);
}
desc->linear_ranges = new;
}
dev_dbg(dev, "regulator '%s' has FB pull-up configured\n",
desc->name);
return 0;
}
return -ENODEV;
}
static int get_special_regulators(struct device *dev,
struct bd718xx_regulator_data *reg_data,
unsigned int num_reg_data, int *info)
{
int ret;
struct device_node *np;
struct device_node *nproot = dev->of_node;
int uv;
*info = 0;
nproot = of_get_child_by_name(nproot, "regulators");
if (!nproot) {
dev_err(dev, "failed to find regulators node\n");
return -ENODEV;
}
for_each_child_of_node(nproot, np) {
if (of_property_read_bool(np, "rohm,no-regulator-enable-control"))
mark_hw_controlled(dev, np, reg_data, num_reg_data,
info);
ret = of_property_read_u32(np, "rohm,fb-pull-up-microvolt",
&uv);
if (ret) {
if (ret == -EINVAL)
continue;
else
goto err_out;
}
ret = setup_feedback_loop(dev, np, reg_data, num_reg_data, uv);
if (ret)
goto err_out;
}
of_node_put(nproot);
return 0;
err_out:
of_node_put(np);
of_node_put(nproot);
return ret;
}
static int bd718xx_probe(struct platform_device *pdev)
{
struct regmap *regmap;
struct regulator_config config = { 0 };
int i, j, err, omit_enable;
bool use_snvs;
struct bd718xx_regulator_data *reg_data;
unsigned int num_reg_data;
enum rohm_chip_type chip = platform_get_device_id(pdev)->driver_data;
const struct regulator_ops **swops, **hwops;
regmap = dev_get_regmap(pdev->dev.parent, NULL);
if (!regmap) {
dev_err(&pdev->dev, "No MFD driver data\n");
return -EINVAL;
}
switch (chip) {
case ROHM_CHIP_TYPE_BD71837:
reg_data = bd71837_regulators;
num_reg_data = ARRAY_SIZE(bd71837_regulators);
swops = &bd71837_swcontrol_ops[0];
hwops = &bd71837_hwcontrol_ops[0];
break;
case ROHM_CHIP_TYPE_BD71847:
reg_data = bd71847_regulators;
num_reg_data = ARRAY_SIZE(bd71847_regulators);
swops = &bd71847_swcontrol_ops[0];
hwops = &bd71847_hwcontrol_ops[0];
break;
default:
dev_err(&pdev->dev, "Unsupported chip type\n");
err = -EINVAL;
goto err;
}
/* Register LOCK release */
err = regmap_update_bits(regmap, BD718XX_REG_REGLOCK,
(REGLOCK_PWRSEQ | REGLOCK_VREG), 0);
if (err) {
dev_err(&pdev->dev, "Failed to unlock PMIC (%d)\n", err);
goto err;
} else {
dev_dbg(&pdev->dev, "Unlocked lock register 0x%x\n",
BD718XX_REG_REGLOCK);
}
use_snvs = of_property_read_bool(pdev->dev.parent->of_node,
"rohm,reset-snvs-powered");
/*
* Change the next stage from poweroff to be READY instead of SNVS
* for all reset types because OTP loading at READY will clear SEL
* bit allowing HW defaults for power rails to be used
*/
if (!use_snvs) {
err = regmap_update_bits(regmap, BD718XX_REG_TRANS_COND1,
BD718XX_ON_REQ_POWEROFF_MASK |
BD718XX_SWRESET_POWEROFF_MASK |
BD718XX_WDOG_POWEROFF_MASK |
BD718XX_KEY_L_POWEROFF_MASK,
BD718XX_POWOFF_TO_RDY);
if (err) {
dev_err(&pdev->dev, "Failed to change reset target\n");
goto err;
} else {
dev_dbg(&pdev->dev,
"Changed all resets from SVNS to READY\n");
}
}
config.dev = pdev->dev.parent;
config.regmap = regmap;
/*
* There are cases when we want to leave the enable-control for
* the HW state machine and use this driver only for voltage control.
* One special case is when we use PMIC_STBY_REQ line from SoC to PMIC
* in order to set the system to SUSPEND state.
*
* If regulator is taken under SW control the regulator state will not
* be affected by PMIC state machine - Eg. regulator is likely to stay
* on even in SUSPEND
*/
err = get_special_regulators(pdev->dev.parent, reg_data, num_reg_data,
&omit_enable);
if (err)
return err;
for (i = 0; i < num_reg_data; i++) {
struct regulator_desc *desc;
struct regulator_dev *rdev;
struct bd718xx_regulator_data *r;
int no_enable_control = omit_enable & (1 << i);
r = &reg_data[i];
desc = &r->desc;
if (no_enable_control)
desc->ops = hwops[i];
else
desc->ops = swops[i];
rdev = devm_regulator_register(&pdev->dev, desc, &config);
if (IS_ERR(rdev)) {
dev_err(&pdev->dev,
"failed to register %s regulator\n",
desc->name);
err = PTR_ERR(rdev);
goto err;
}
/*
* Regulator register gets the regulator constraints and
* applies them (set_machine_constraints). This should have
* turned the control register(s) to correct values and we
* can now switch the control from PMIC state machine to the
* register interface
*
* At poweroff transition PMIC HW disables EN bit for
* regulators but leaves SEL bit untouched. So if state
* transition from POWEROFF is done to SNVS - then all power
* rails controlled by SW (having SEL bit set) stay disabled
* as EN is cleared. This will result boot failure if any
* crucial systems are powered by these rails. We don't
* enable SW control for crucial regulators if snvs state is
* used
*/
if (!no_enable_control && (!use_snvs ||
!rdev->constraints->always_on ||
!rdev->constraints->boot_on)) {
err = regmap_update_bits(regmap, r->init.reg,
r->init.mask, r->init.val);
if (err) {
dev_err(&pdev->dev,
"Failed to take control for (%s)\n",
desc->name);
goto err;
}
}
for (j = 0; j < r->additional_init_amnt; j++) {
err = regmap_update_bits(regmap,
r->additional_inits[j].reg,
r->additional_inits[j].mask,
r->additional_inits[j].val);
if (err) {
dev_err(&pdev->dev,
"Buck (%s) initialization failed\n",
desc->name);
goto err;
}
}
}
err:
return err;
}
static const struct platform_device_id bd718x7_pmic_id[] = {
{ "bd71837-pmic", ROHM_CHIP_TYPE_BD71837 },
{ "bd71847-pmic", ROHM_CHIP_TYPE_BD71847 },
{ },
};
MODULE_DEVICE_TABLE(platform, bd718x7_pmic_id);
static struct platform_driver bd718xx_regulator = {
.driver = {
.name = "bd718xx-pmic",
},
.probe = bd718xx_probe,
.id_table = bd718x7_pmic_id,
};
module_platform_driver(bd718xx_regulator);
MODULE_AUTHOR("Matti Vaittinen <matti.vaittinen@fi.rohmeurope.com>");
MODULE_DESCRIPTION("BD71837/BD71847 voltage regulator driver");
MODULE_LICENSE("GPL");
MODULE_ALIAS("platform:bd718xx-pmic");
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