// SPDX-License-Identifier: GPL-2.0
//
// tps65219-regulator.c
//
// Regulator driver for TPS65219 PMIC
//
// Copyright (C) 2022 BayLibre Incorporated - https://www.baylibre.com/
//
// This implementation derived from tps65218 authored by
// "J Keerthy <j-keerthy@ti.com>"
//
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/device.h>
#include <linux/init.h>
#include <linux/err.h>
#include <linux/of.h>
#include <linux/platform_device.h>
#include <linux/regmap.h>
#include <linux/regulator/of_regulator.h>
#include <linux/regulator/driver.h>
#include <linux/regulator/machine.h>
#include <linux/mfd/tps65219.h>
struct tps65219_regulator_irq_type {
const char *irq_name;
const char *regulator_name;
const char *event_name;
unsigned long event;
};
static struct tps65219_regulator_irq_type tps65219_regulator_irq_types[] = {
{ "LDO3_SCG", "LDO3", "short circuit to ground", REGULATOR_EVENT_REGULATION_OUT },
{ "LDO3_OC", "LDO3", "overcurrent", REGULATOR_EVENT_OVER_CURRENT },
{ "LDO3_UV", "LDO3", "undervoltage", REGULATOR_EVENT_UNDER_VOLTAGE },
{ "LDO4_SCG", "LDO4", "short circuit to ground", REGULATOR_EVENT_REGULATION_OUT },
{ "LDO4_OC", "LDO4", "overcurrent", REGULATOR_EVENT_OVER_CURRENT },
{ "LDO4_UV", "LDO4", "undervoltage", REGULATOR_EVENT_UNDER_VOLTAGE },
{ "LDO1_SCG", "LDO1", "short circuit to ground", REGULATOR_EVENT_REGULATION_OUT },
{ "LDO1_OC", "LDO1", "overcurrent", REGULATOR_EVENT_OVER_CURRENT },
{ "LDO1_UV", "LDO1", "undervoltage", REGULATOR_EVENT_UNDER_VOLTAGE },
{ "LDO2_SCG", "LDO2", "short circuit to ground", REGULATOR_EVENT_REGULATION_OUT },
{ "LDO2_OC", "LDO2", "overcurrent", REGULATOR_EVENT_OVER_CURRENT },
{ "LDO2_UV", "LDO2", "undervoltage", REGULATOR_EVENT_UNDER_VOLTAGE },
{ "BUCK3_SCG", "BUCK3", "short circuit to ground", REGULATOR_EVENT_REGULATION_OUT },
{ "BUCK3_OC", "BUCK3", "overcurrent", REGULATOR_EVENT_OVER_CURRENT },
{ "BUCK3_NEG_OC", "BUCK3", "negative overcurrent", REGULATOR_EVENT_OVER_CURRENT },
{ "BUCK3_UV", "BUCK3", "undervoltage", REGULATOR_EVENT_UNDER_VOLTAGE },
{ "BUCK1_SCG", "BUCK1", "short circuit to ground", REGULATOR_EVENT_REGULATION_OUT },
{ "BUCK1_OC", "BUCK1", "overcurrent", REGULATOR_EVENT_OVER_CURRENT },
{ "BUCK1_NEG_OC", "BUCK1", "negative overcurrent", REGULATOR_EVENT_OVER_CURRENT },
{ "BUCK1_UV", "BUCK1", "undervoltage", REGULATOR_EVENT_UNDER_VOLTAGE },
{ "BUCK2_SCG", "BUCK2", "short circuit to ground", REGULATOR_EVENT_REGULATION_OUT },
{ "BUCK2_OC", "BUCK2", "overcurrent", REGULATOR_EVENT_OVER_CURRENT },
{ "BUCK2_NEG_OC", "BUCK2", "negative overcurrent", REGULATOR_EVENT_OVER_CURRENT },
{ "BUCK2_UV", "BUCK2", "undervoltage", REGULATOR_EVENT_UNDER_VOLTAGE },
{ "BUCK1_RV", "BUCK1", "residual voltage", REGULATOR_EVENT_OVER_VOLTAGE_WARN },
{ "BUCK2_RV", "BUCK2", "residual voltage", REGULATOR_EVENT_OVER_VOLTAGE_WARN },
{ "BUCK3_RV", "BUCK3", "residual voltage", REGULATOR_EVENT_OVER_VOLTAGE_WARN },
{ "LDO1_RV", "LDO1", "residual voltage", REGULATOR_EVENT_OVER_VOLTAGE_WARN },
{ "LDO2_RV", "LDO2", "residual voltage", REGULATOR_EVENT_OVER_VOLTAGE_WARN },
{ "LDO3_RV", "LDO3", "residual voltage", REGULATOR_EVENT_OVER_VOLTAGE_WARN },
{ "LDO4_RV", "LDO4", "residual voltage", REGULATOR_EVENT_OVER_VOLTAGE_WARN },
{ "BUCK1_RV_SD", "BUCK1", "residual voltage on shutdown",
REGULATOR_EVENT_OVER_VOLTAGE_WARN },
{ "BUCK2_RV_SD", "BUCK2", "residual voltage on shutdown",
REGULATOR_EVENT_OVER_VOLTAGE_WARN },
{ "BUCK3_RV_SD", "BUCK3", "residual voltage on shutdown",
REGULATOR_EVENT_OVER_VOLTAGE_WARN },
{ "LDO1_RV_SD", "LDO1", "residual voltage on shutdown", REGULATOR_EVENT_OVER_VOLTAGE_WARN },
{ "LDO2_RV_SD", "LDO2", "residual voltage on shutdown", REGULATOR_EVENT_OVER_VOLTAGE_WARN },
{ "LDO3_RV_SD", "LDO3", "residual voltage on shutdown", REGULATOR_EVENT_OVER_VOLTAGE_WARN },
{ "LDO4_RV_SD", "LDO4", "residual voltage on shutdown", REGULATOR_EVENT_OVER_VOLTAGE_WARN },
{ "SENSOR_3_WARM", "SENSOR3", "warm temperature", REGULATOR_EVENT_OVER_TEMP_WARN},
{ "SENSOR_2_WARM", "SENSOR2", "warm temperature", REGULATOR_EVENT_OVER_TEMP_WARN },
{ "SENSOR_1_WARM", "SENSOR1", "warm temperature", REGULATOR_EVENT_OVER_TEMP_WARN },
{ "SENSOR_0_WARM", "SENSOR0", "warm temperature", REGULATOR_EVENT_OVER_TEMP_WARN },
{ "SENSOR_3_HOT", "SENSOR3", "hot temperature", REGULATOR_EVENT_OVER_TEMP},
{ "SENSOR_2_HOT", "SENSOR2", "hot temperature", REGULATOR_EVENT_OVER_TEMP },
{ "SENSOR_1_HOT", "SENSOR1", "hot temperature", REGULATOR_EVENT_OVER_TEMP },
{ "SENSOR_0_HOT", "SENSOR0", "hot temperature", REGULATOR_EVENT_OVER_TEMP },
{ "TIMEOUT", "", "", REGULATOR_EVENT_ABORT_VOLTAGE_CHANGE },
};
struct tps65219_regulator_irq_data {
struct device *dev;
struct tps65219_regulator_irq_type *type;
struct regulator_dev *rdev;
};
#define TPS65219_REGULATOR(_name, _of, _id, _type, _ops, _n, _vr, _vm, _er, \
_em, _cr, _cm, _lr, _nlr, _delay, _fuv, \
_ct, _ncl, _bpm) \
{ \
.name = _name, \
.of_match = _of, \
.regulators_node = of_match_ptr("regulators"), \
.supply_name = _of, \
.id = _id, \
.ops = &(_ops), \
.n_voltages = _n, \
.type = _type, \
.owner = THIS_MODULE, \
.vsel_reg = _vr, \
.vsel_mask = _vm, \
.csel_reg = _cr, \
.csel_mask = _cm, \
.curr_table = _ct, \
.n_current_limits = _ncl, \
.enable_reg = _er, \
.enable_mask = _em, \
.volt_table = NULL, \
.linear_ranges = _lr, \
.n_linear_ranges = _nlr, \
.ramp_delay = _delay, \
.fixed_uV = _fuv, \
.bypass_reg = _vr, \
.bypass_mask = _bpm, \
} \
static const struct linear_range bucks_ranges[] = {
REGULATOR_LINEAR_RANGE(600000, 0x0, 0x1f, 25000),
REGULATOR_LINEAR_RANGE(1400000, 0x20, 0x33, 100000),
REGULATOR_LINEAR_RANGE(3400000, 0x34, 0x3f, 0),
};
static const struct linear_range ldos_1_2_ranges[] = {
REGULATOR_LINEAR_RANGE(600000, 0x0, 0x37, 50000),
REGULATOR_LINEAR_RANGE(3400000, 0x38, 0x3f, 0),
};
static const struct linear_range ldos_3_4_ranges[] = {
REGULATOR_LINEAR_RANGE(1200000, 0x0, 0xC, 0),
REGULATOR_LINEAR_RANGE(1250000, 0xD, 0x35, 50000),
REGULATOR_LINEAR_RANGE(3300000, 0x36, 0x3F, 0),
};
static int tps65219_set_mode(struct regulator_dev *dev, unsigned int mode)
{
struct tps65219 *tps = rdev_get_drvdata(dev);
switch (mode) {
case REGULATOR_MODE_NORMAL:
return regmap_set_bits(tps->regmap, TPS65219_REG_STBY_1_CONFIG,
dev->desc->enable_mask);
case REGULATOR_MODE_STANDBY:
return regmap_clear_bits(tps->regmap,
TPS65219_REG_STBY_1_CONFIG,
dev->desc->enable_mask);
default:
return -EINVAL;
}
}
static unsigned int tps65219_get_mode(struct regulator_dev *dev)
{
struct tps65219 *tps = rdev_get_drvdata(dev);
unsigned int rid = rdev_get_id(dev);
int ret, value = 0;
ret = regmap_read(tps->regmap, TPS65219_REG_STBY_1_CONFIG, &value);
if (ret) {
dev_dbg(tps->dev, "%s failed for regulator %s: %d ",
__func__, dev->desc->name, ret);
return ret;
}
value = (value & BIT(rid)) >> rid;
if (value)
return REGULATOR_MODE_STANDBY;
else
return REGULATOR_MODE_NORMAL;
}
/* Operations permitted on BUCK1/2/3 */
static const struct regulator_ops tps65219_bucks_ops = {
.is_enabled = regulator_is_enabled_regmap,
.enable = regulator_enable_regmap,
.disable = regulator_disable_regmap,
.set_mode = tps65219_set_mode,
.get_mode = tps65219_get_mode,
.get_voltage_sel = regulator_get_voltage_sel_regmap,
.set_voltage_sel = regulator_set_voltage_sel_regmap,
.list_voltage = regulator_list_voltage_linear_range,
.map_voltage = regulator_map_voltage_linear_range,
.set_voltage_time_sel = regulator_set_voltage_time_sel,
};
/* Operations permitted on LDO1/2 */
static const struct regulator_ops tps65219_ldos_1_2_ops = {
.is_enabled = regulator_is_enabled_regmap,
.enable = regulator_enable_regmap,
.disable = regulator_disable_regmap,
.set_mode = tps65219_set_mode,
.get_mode = tps65219_get_mode,
.get_voltage_sel = regulator_get_voltage_sel_regmap,
.set_voltage_sel = regulator_set_voltage_sel_regmap,
.list_voltage = regulator_list_voltage_linear_range,
.map_voltage = regulator_map_voltage_linear_range,
.set_bypass = regulator_set_bypass_regmap,
.get_bypass = regulator_get_bypass_regmap,
};
/* Operations permitted on LDO3/4 */
static const struct regulator_ops tps65219_ldos_3_4_ops = {
.is_enabled = regulator_is_enabled_regmap,
.enable = regulator_enable_regmap,
.disable = regulator_disable_regmap,
.set_mode = tps65219_set_mode,
.get_mode = tps65219_get_mode,
.get_voltage_sel = regulator_get_voltage_sel_regmap,
.set_voltage_sel = regulator_set_voltage_sel_regmap,
.list_voltage = regulator_list_voltage_linear_range,
.map_voltage = regulator_map_voltage_linear_range,
};
static const struct regulator_desc regulators[] = {
TPS65219_REGULATOR("BUCK1", "buck1", TPS65219_BUCK_1,
REGULATOR_VOLTAGE, tps65219_bucks_ops, 64,
TPS65219_REG_BUCK1_VOUT,
TPS65219_BUCKS_LDOS_VOUT_VSET_MASK,
TPS65219_REG_ENABLE_CTRL,
TPS65219_ENABLE_BUCK1_EN_MASK, 0, 0, bucks_ranges,
3, 4000, 0, NULL, 0, 0),
TPS65219_REGULATOR("BUCK2", "buck2", TPS65219_BUCK_2,
REGULATOR_VOLTAGE, tps65219_bucks_ops, 64,
TPS65219_REG_BUCK2_VOUT,
TPS65219_BUCKS_LDOS_VOUT_VSET_MASK,
TPS65219_REG_ENABLE_CTRL,
TPS65219_ENABLE_BUCK2_EN_MASK, 0, 0, bucks_ranges,
3, 4000, 0, NULL, 0, 0),
TPS65219_REGULATOR("BUCK3", "buck3", TPS65219_BUCK_3,
REGULATOR_VOLTAGE, tps65219_bucks_ops, 64,
TPS65219_REG_BUCK3_VOUT,
TPS65219_BUCKS_LDOS_VOUT_VSET_MASK,
TPS65219_REG_ENABLE_CTRL,
TPS65219_ENABLE_BUCK3_EN_MASK, 0, 0, bucks_ranges,
3, 0, 0, NULL, 0, 0),
TPS65219_REGULATOR("LDO1", "ldo1", TPS65219_LDO_1,
REGULATOR_VOLTAGE, tps65219_ldos_1_2_ops, 64,
TPS65219_REG_LDO1_VOUT,
TPS65219_BUCKS_LDOS_VOUT_VSET_MASK,
TPS65219_REG_ENABLE_CTRL,
TPS65219_ENABLE_LDO1_EN_MASK, 0, 0, ldos_1_2_ranges,
2, 0, 0, NULL, 0, TPS65219_LDOS_BYP_CONFIG_MASK),
TPS65219_REGULATOR("LDO2", "ldo2", TPS65219_LDO_2,
REGULATOR_VOLTAGE, tps65219_ldos_1_2_ops, 64,
TPS65219_REG_LDO2_VOUT,
TPS65219_BUCKS_LDOS_VOUT_VSET_MASK,
TPS65219_REG_ENABLE_CTRL,
TPS65219_ENABLE_LDO2_EN_MASK, 0, 0, ldos_1_2_ranges,
2, 0, 0, NULL, 0, TPS65219_LDOS_BYP_CONFIG_MASK),
TPS65219_REGULATOR("LDO3", "ldo3", TPS65219_LDO_3,
REGULATOR_VOLTAGE, tps65219_ldos_3_4_ops, 64,
TPS65219_REG_LDO3_VOUT,
TPS65219_BUCKS_LDOS_VOUT_VSET_MASK,
TPS65219_REG_ENABLE_CTRL,
TPS65219_ENABLE_LDO3_EN_MASK, 0, 0, ldos_3_4_ranges,
3, 0, 0, NULL, 0, 0),
TPS65219_REGULATOR("LDO4", "ldo4", TPS65219_LDO_4,
REGULATOR_VOLTAGE, tps65219_ldos_3_4_ops, 64,
TPS65219_REG_LDO4_VOUT,
TPS65219_BUCKS_LDOS_VOUT_VSET_MASK,
TPS65219_REG_ENABLE_CTRL,
TPS65219_ENABLE_LDO4_EN_MASK, 0, 0, ldos_3_4_ranges,
3, 0, 0, NULL, 0, 0),
};
static irqreturn_t tps65219_regulator_irq_handler(int irq, void *data)
{
struct tps65219_regulator_irq_data *irq_data = data;
if (irq_data->type->event_name[0] == '\0') {
/* This is the timeout interrupt no specific regulator */
dev_err(irq_data->dev,
"System was put in shutdown due to timeout during an active or standby transition.\n");
return IRQ_HANDLED;
}
regulator_notifier_call_chain(irq_data->rdev,
irq_data->type->event, NULL);
dev_err(irq_data->dev, "Error IRQ trap %s for %s\n",
irq_data->type->event_name, irq_data->type->regulator_name);
return IRQ_HANDLED;
}
static int tps65219_get_rdev_by_name(const char *regulator_name,
struct regulator_dev *rdevtbl[7],
struct regulator_dev **dev)
{
int i;
for (i = 0; i < ARRAY_SIZE(regulators); i++) {
if (strcmp(regulator_name, regulators[i].name) == 0) {
*dev = rdevtbl[i];
return 0;
}
}
return -EINVAL;
}
static int tps65219_regulator_probe(struct platform_device *pdev)
{
struct tps65219 *tps = dev_get_drvdata(pdev->dev.parent);
struct regulator_dev *rdev;
struct regulator_config config = { };
int i;
int error;
int irq;
struct tps65219_regulator_irq_data *irq_data;
struct tps65219_regulator_irq_type *irq_type;
struct regulator_dev *rdevtbl[7];
config.dev = tps->dev;
config.driver_data = tps;
config.regmap = tps->regmap;
for (i = 0; i < ARRAY_SIZE(regulators); i++) {
dev_dbg(tps->dev, "%s regul i= %d START", __func__, i);
rdev = devm_regulator_register(&pdev->dev, ®ulators[i],
&config);
if (IS_ERR(rdev)) {
dev_err(tps->dev, "failed to register %s regulator\n",
regulators[i].name);
return PTR_ERR(rdev);
}
rdevtbl[i] = rdev;
dev_dbg(tps->dev, "%s regul i= %d COMPLETED", __func__, i);
}
irq_data = devm_kmalloc(tps->dev,
ARRAY_SIZE(tps65219_regulator_irq_types) *
sizeof(struct tps65219_regulator_irq_data),
GFP_KERNEL);
if (!irq_data)
return -ENOMEM;
for (i = 0; i < ARRAY_SIZE(tps65219_regulator_irq_types); ++i) {
irq_type = &tps65219_regulator_irq_types[i];
irq = platform_get_irq_byname(pdev, irq_type->irq_name);
if (irq < 0)
return -EINVAL;
irq_data[i].dev = tps->dev;
irq_data[i].type = irq_type;
tps65219_get_rdev_by_name(irq_type->regulator_name, rdevtbl, &rdev);
if (IS_ERR(rdev)) {
dev_err(tps->dev, "Failed to get rdev for %s\n",
irq_type->regulator_name);
return -EINVAL;
}
irq_data[i].rdev = rdev;
error = devm_request_threaded_irq(tps->dev, irq, NULL,
tps65219_regulator_irq_handler,
IRQF_ONESHOT,
irq_type->irq_name,
&irq_data[i]);
if (error) {
dev_err(tps->dev, "failed to request %s IRQ %d: %d\n",
irq_type->irq_name, irq, error);
return error;
}
}
return 0;
}
static const struct platform_device_id tps65219_regulator_id_table[] = {
{ "tps65219-regulator", },
{ /* sentinel */ }
};
MODULE_DEVICE_TABLE(platform, tps65219_regulator_id_table);
static struct platform_driver tps65219_regulator_driver = {
.driver = {
.name = "tps65219-pmic",
.probe_type = PROBE_PREFER_ASYNCHRONOUS,
},
.probe = tps65219_regulator_probe,
.id_table = tps65219_regulator_id_table,
};
module_platform_driver(tps65219_regulator_driver);
MODULE_AUTHOR("Jerome Neanne <j-neanne@baylibre.com>");
MODULE_DESCRIPTION("TPS65219 voltage regulator driver");
MODULE_ALIAS("platform:tps65219-pmic");
MODULE_LICENSE("GPL");
