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linux/linux-5.18.11/drivers/regulator/bd71815-regulator.c

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2024-03-22 18:12:32 +00:00
// 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>
//
// Partially rewritten at 2021 by
// Matti Vaittinen <matti.vaitinen@fi.rohmeurope.com>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/err.h>
#include <linux/platform_device.h>
#include <linux/of.h>
#include <linux/gpio/consumer.h>
#include <linux/regulator/driver.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>
struct bd71815_regulator {
struct regulator_desc desc;
const struct rohm_dvs_config *dvs;
};
static const int bd7181x_wled_currents[] = {
10, 20, 30, 50, 70, 100, 200, 300, 500, 700, 1000, 2000, 3000, 4000,
5000, 6000, 7000, 8000, 9000, 10000, 11000, 12000, 13000, 14000, 15000,
16000, 17000, 18000, 19000, 20000, 21000, 22000, 23000, 24000, 25000,
};
static 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,
};
static 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,
};
static 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,
};
static 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,
};
static 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,
};
static 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,
};
static 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,
};
static 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,
};
static 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,
};
static 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,
};
static 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,
};
static 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);
}
/*
* Bucks 1 and 2 have two voltage selection registers where selected
* voltage can be set. Which of the registers is used can be either controlled
* by a control bit in register - or by HW state. If HW state specific voltages
* are given - then we assume HW state based control should be used.
*
* If volatge value is updated to currently selected register - then output
* voltage is immediately changed no matter what is set as ramp rate. Thus we
* default changing voltage by writing new value to inactive register and
* then updating the 'register selection' bit. This naturally only works when
* HW state machine is not used to select the voltage.
*/
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: AFAIK, 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 const unsigned int bd7181x_ramp_table[] = { 1250, 2500, 5000, 10000 };
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),
"failed to revert the LED state (%d)\n",
ret);
}
}
return ret;
}
static int bd7181x_buck12_get_voltage_sel(struct regulator_dev *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(rdev->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(rdev->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)
{
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(rdev->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_REG_BUCK1_VOLT_H. Changing SUSPEND/LPSR
* voltages at runtime is not supported by this driver.
*/
if (((val & BD71815_BUCK_STBY_DVS))) {
return regmap_update_bits(rdev->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(rdev->regmap, reg, BD71815_VOLT_MASK, sel);
if (ret)
return ret;
/* Select the other DVS register to be used */
return regmap_update_bits(rdev->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 = regulator_set_ramp_delay_regmap,
};
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 = BD71815_VOLT_MASK, \
.enable_reg = (ereg), \
.enable_mask = BD71815_BUCK_RUN_ON, \
.ramp_reg = (ereg), \
.ramp_mask = BD71815_BUCK_RAMPRATE_MASK, \
.ramp_delay_table = bd7181x_ramp_table, \
.n_ramp_values = ARRAY_SIZE(bd7181x_ramp_table),\
.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 const 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),
};
static int bd7181x_probe(struct platform_device *pdev)
{
struct regulator_config config = {};
int i, ret;
struct gpio_desc *ldo4_en;
struct regmap *regmap;
regmap = dev_get_regmap(pdev->dev.parent, NULL);
if (!regmap) {
dev_err(&pdev->dev, "No parent regmap\n");
return -ENODEV;
}
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(regmap, BD71815_REG_PWRCTRL, RESTARTEN, 0);
if (ret)
return ret;
config.dev = pdev->dev.parent;
config.regmap = regmap;
for (i = 0; i < BD71815_REGULATOR_CNT; i++) {
const struct regulator_desc *desc;
struct regulator_dev *rdev;
desc = &bd71815_regulators[i].desc;
if (i == BD71815_LDO4)
config.ena_gpiod = ldo4_en;
else
config.ena_gpiod = NULL;
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);
}
}
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",
},
.probe = bd7181x_probe,
.id_table = bd7181x_pmic_id,
};
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");