forked from Qortal/Brooklyn
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
234 lines
6.2 KiB
234 lines
6.2 KiB
// SPDX-License-Identifier: GPL-2.0+ |
|
// |
|
// da9210-regulator.c - Regulator device driver for DA9210 |
|
// Copyright (C) 2013 Dialog Semiconductor Ltd. |
|
|
|
#include <linux/err.h> |
|
#include <linux/i2c.h> |
|
#include <linux/module.h> |
|
#include <linux/interrupt.h> |
|
#include <linux/irq.h> |
|
#include <linux/regulator/driver.h> |
|
#include <linux/regulator/machine.h> |
|
#include <linux/of_device.h> |
|
#include <linux/regulator/of_regulator.h> |
|
#include <linux/regmap.h> |
|
|
|
#include "da9210-regulator.h" |
|
|
|
struct da9210 { |
|
struct regulator_dev *rdev; |
|
struct regmap *regmap; |
|
}; |
|
|
|
static const struct regmap_config da9210_regmap_config = { |
|
.reg_bits = 8, |
|
.val_bits = 8, |
|
}; |
|
|
|
static const struct regulator_ops da9210_buck_ops = { |
|
.enable = regulator_enable_regmap, |
|
.disable = regulator_disable_regmap, |
|
.is_enabled = regulator_is_enabled_regmap, |
|
.set_voltage_sel = regulator_set_voltage_sel_regmap, |
|
.get_voltage_sel = regulator_get_voltage_sel_regmap, |
|
.list_voltage = regulator_list_voltage_linear, |
|
.set_current_limit = regulator_set_current_limit_regmap, |
|
.get_current_limit = regulator_get_current_limit_regmap, |
|
}; |
|
|
|
/* Default limits measured in millivolts and milliamps */ |
|
#define DA9210_MIN_MV 300 |
|
#define DA9210_MAX_MV 1570 |
|
#define DA9210_STEP_MV 10 |
|
|
|
/* Current limits for buck (uA) indices corresponds with register values */ |
|
static const unsigned int da9210_buck_limits[] = { |
|
1600000, 1800000, 2000000, 2200000, 2400000, 2600000, 2800000, 3000000, |
|
3200000, 3400000, 3600000, 3800000, 4000000, 4200000, 4400000, 4600000 |
|
}; |
|
|
|
static const struct regulator_desc da9210_reg = { |
|
.name = "DA9210", |
|
.id = 0, |
|
.ops = &da9210_buck_ops, |
|
.type = REGULATOR_VOLTAGE, |
|
.n_voltages = ((DA9210_MAX_MV - DA9210_MIN_MV) / DA9210_STEP_MV) + 1, |
|
.min_uV = (DA9210_MIN_MV * 1000), |
|
.uV_step = (DA9210_STEP_MV * 1000), |
|
.vsel_reg = DA9210_REG_VBUCK_A, |
|
.vsel_mask = DA9210_VBUCK_MASK, |
|
.enable_reg = DA9210_REG_BUCK_CONT, |
|
.enable_mask = DA9210_BUCK_EN, |
|
.owner = THIS_MODULE, |
|
.curr_table = da9210_buck_limits, |
|
.n_current_limits = ARRAY_SIZE(da9210_buck_limits), |
|
.csel_reg = DA9210_REG_BUCK_ILIM, |
|
.csel_mask = DA9210_BUCK_ILIM_MASK, |
|
}; |
|
|
|
static irqreturn_t da9210_irq_handler(int irq, void *data) |
|
{ |
|
struct da9210 *chip = data; |
|
unsigned int val, handled = 0; |
|
int error, ret = IRQ_NONE; |
|
|
|
error = regmap_read(chip->regmap, DA9210_REG_EVENT_B, &val); |
|
if (error < 0) |
|
goto error_i2c; |
|
|
|
if (val & DA9210_E_OVCURR) { |
|
regulator_notifier_call_chain(chip->rdev, |
|
REGULATOR_EVENT_OVER_CURRENT, |
|
NULL); |
|
handled |= DA9210_E_OVCURR; |
|
} |
|
if (val & DA9210_E_NPWRGOOD) { |
|
regulator_notifier_call_chain(chip->rdev, |
|
REGULATOR_EVENT_UNDER_VOLTAGE, |
|
NULL); |
|
handled |= DA9210_E_NPWRGOOD; |
|
} |
|
if (val & (DA9210_E_TEMP_WARN | DA9210_E_TEMP_CRIT)) { |
|
regulator_notifier_call_chain(chip->rdev, |
|
REGULATOR_EVENT_OVER_TEMP, NULL); |
|
handled |= val & (DA9210_E_TEMP_WARN | DA9210_E_TEMP_CRIT); |
|
} |
|
if (val & DA9210_E_VMAX) { |
|
regulator_notifier_call_chain(chip->rdev, |
|
REGULATOR_EVENT_REGULATION_OUT, |
|
NULL); |
|
handled |= DA9210_E_VMAX; |
|
} |
|
|
|
if (handled) { |
|
/* Clear handled events */ |
|
error = regmap_write(chip->regmap, DA9210_REG_EVENT_B, handled); |
|
if (error < 0) |
|
goto error_i2c; |
|
|
|
ret = IRQ_HANDLED; |
|
} |
|
|
|
return ret; |
|
|
|
error_i2c: |
|
dev_err(regmap_get_device(chip->regmap), "I2C error : %d\n", error); |
|
return ret; |
|
} |
|
|
|
/* |
|
* I2C driver interface functions |
|
*/ |
|
|
|
static const struct of_device_id __maybe_unused da9210_dt_ids[] = { |
|
{ .compatible = "dlg,da9210", }, |
|
{ } |
|
}; |
|
MODULE_DEVICE_TABLE(of, da9210_dt_ids); |
|
|
|
static int da9210_i2c_probe(struct i2c_client *i2c) |
|
{ |
|
struct da9210 *chip; |
|
struct device *dev = &i2c->dev; |
|
struct da9210_pdata *pdata = dev_get_platdata(dev); |
|
struct regulator_dev *rdev = NULL; |
|
struct regulator_config config = { }; |
|
int error; |
|
const struct of_device_id *match; |
|
|
|
if (i2c->dev.of_node && !pdata) { |
|
match = of_match_device(of_match_ptr(da9210_dt_ids), |
|
&i2c->dev); |
|
if (!match) { |
|
dev_err(&i2c->dev, "Error: No device match found\n"); |
|
return -ENODEV; |
|
} |
|
} |
|
|
|
chip = devm_kzalloc(&i2c->dev, sizeof(struct da9210), GFP_KERNEL); |
|
if (!chip) |
|
return -ENOMEM; |
|
|
|
chip->regmap = devm_regmap_init_i2c(i2c, &da9210_regmap_config); |
|
if (IS_ERR(chip->regmap)) { |
|
error = PTR_ERR(chip->regmap); |
|
dev_err(&i2c->dev, "Failed to allocate register map: %d\n", |
|
error); |
|
return error; |
|
} |
|
|
|
config.dev = &i2c->dev; |
|
config.init_data = pdata ? &pdata->da9210_constraints : |
|
of_get_regulator_init_data(dev, dev->of_node, &da9210_reg); |
|
config.driver_data = chip; |
|
config.regmap = chip->regmap; |
|
config.of_node = dev->of_node; |
|
|
|
/* Mask all interrupt sources to deassert interrupt line */ |
|
error = regmap_write(chip->regmap, DA9210_REG_MASK_A, ~0); |
|
if (!error) |
|
error = regmap_write(chip->regmap, DA9210_REG_MASK_B, ~0); |
|
if (error) { |
|
dev_err(&i2c->dev, "Failed to write to mask reg: %d\n", error); |
|
return error; |
|
} |
|
|
|
rdev = devm_regulator_register(&i2c->dev, &da9210_reg, &config); |
|
if (IS_ERR(rdev)) { |
|
dev_err(&i2c->dev, "Failed to register DA9210 regulator\n"); |
|
return PTR_ERR(rdev); |
|
} |
|
|
|
chip->rdev = rdev; |
|
if (i2c->irq) { |
|
error = devm_request_threaded_irq(&i2c->dev, i2c->irq, NULL, |
|
da9210_irq_handler, |
|
IRQF_TRIGGER_LOW | |
|
IRQF_ONESHOT | IRQF_SHARED, |
|
"da9210", chip); |
|
if (error) { |
|
dev_err(&i2c->dev, "Failed to request IRQ%u: %d\n", |
|
i2c->irq, error); |
|
return error; |
|
} |
|
|
|
error = regmap_update_bits(chip->regmap, DA9210_REG_MASK_B, |
|
DA9210_M_OVCURR | DA9210_M_NPWRGOOD | |
|
DA9210_M_TEMP_WARN | |
|
DA9210_M_TEMP_CRIT | DA9210_M_VMAX, 0); |
|
if (error < 0) { |
|
dev_err(&i2c->dev, "Failed to update mask reg: %d\n", |
|
error); |
|
return error; |
|
} |
|
} else { |
|
dev_warn(&i2c->dev, "No IRQ configured\n"); |
|
} |
|
|
|
i2c_set_clientdata(i2c, chip); |
|
|
|
return 0; |
|
} |
|
|
|
static const struct i2c_device_id da9210_i2c_id[] = { |
|
{"da9210", 0}, |
|
{}, |
|
}; |
|
|
|
MODULE_DEVICE_TABLE(i2c, da9210_i2c_id); |
|
|
|
static struct i2c_driver da9210_regulator_driver = { |
|
.driver = { |
|
.name = "da9210", |
|
.of_match_table = of_match_ptr(da9210_dt_ids), |
|
}, |
|
.probe_new = da9210_i2c_probe, |
|
.id_table = da9210_i2c_id, |
|
}; |
|
|
|
module_i2c_driver(da9210_regulator_driver); |
|
|
|
MODULE_AUTHOR("S Twiss <[email protected]>"); |
|
MODULE_DESCRIPTION("Regulator device driver for Dialog DA9210"); |
|
MODULE_LICENSE("GPL v2");
|
|
|