391 строка
9.7 KiB
C
391 строка
9.7 KiB
C
// SPDX-License-Identifier: GPL-2.0+
|
|
//
|
|
// pv88060-regulator.c - Regulator device driver for PV88060
|
|
// Copyright (C) 2015 Powerventure Semiconductor Ltd.
|
|
|
|
#include <linux/err.h>
|
|
#include <linux/i2c.h>
|
|
#include <linux/module.h>
|
|
#include <linux/init.h>
|
|
#include <linux/slab.h>
|
|
#include <linux/regulator/driver.h>
|
|
#include <linux/regulator/machine.h>
|
|
#include <linux/regmap.h>
|
|
#include <linux/irq.h>
|
|
#include <linux/interrupt.h>
|
|
#include <linux/regulator/of_regulator.h>
|
|
#include "pv88060-regulator.h"
|
|
|
|
#define PV88060_MAX_REGULATORS 14
|
|
|
|
/* PV88060 REGULATOR IDs */
|
|
enum {
|
|
/* BUCKs */
|
|
PV88060_ID_BUCK1,
|
|
|
|
/* LDOs */
|
|
PV88060_ID_LDO1,
|
|
PV88060_ID_LDO2,
|
|
PV88060_ID_LDO3,
|
|
PV88060_ID_LDO4,
|
|
PV88060_ID_LDO5,
|
|
PV88060_ID_LDO6,
|
|
PV88060_ID_LDO7,
|
|
|
|
/* SWTs */
|
|
PV88060_ID_SW1,
|
|
PV88060_ID_SW2,
|
|
PV88060_ID_SW3,
|
|
PV88060_ID_SW4,
|
|
PV88060_ID_SW5,
|
|
PV88060_ID_SW6,
|
|
};
|
|
|
|
struct pv88060_regulator {
|
|
struct regulator_desc desc;
|
|
unsigned int conf; /* buck configuration register */
|
|
};
|
|
|
|
struct pv88060 {
|
|
struct device *dev;
|
|
struct regmap *regmap;
|
|
struct regulator_dev *rdev[PV88060_MAX_REGULATORS];
|
|
};
|
|
|
|
static const struct regmap_config pv88060_regmap_config = {
|
|
.reg_bits = 8,
|
|
.val_bits = 8,
|
|
};
|
|
|
|
/* Current limits array (in uA) for BUCK1
|
|
* Entry indexes corresponds to register values.
|
|
*/
|
|
|
|
static const unsigned int pv88060_buck1_limits[] = {
|
|
1496000, 2393000, 3291000, 4189000
|
|
};
|
|
|
|
static unsigned int pv88060_buck_get_mode(struct regulator_dev *rdev)
|
|
{
|
|
struct pv88060_regulator *info = rdev_get_drvdata(rdev);
|
|
unsigned int data;
|
|
int ret, mode = 0;
|
|
|
|
ret = regmap_read(rdev->regmap, info->conf, &data);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
switch (data & PV88060_BUCK_MODE_MASK) {
|
|
case PV88060_BUCK_MODE_SYNC:
|
|
mode = REGULATOR_MODE_FAST;
|
|
break;
|
|
case PV88060_BUCK_MODE_AUTO:
|
|
mode = REGULATOR_MODE_NORMAL;
|
|
break;
|
|
case PV88060_BUCK_MODE_SLEEP:
|
|
mode = REGULATOR_MODE_STANDBY;
|
|
break;
|
|
}
|
|
|
|
return mode;
|
|
}
|
|
|
|
static int pv88060_buck_set_mode(struct regulator_dev *rdev,
|
|
unsigned int mode)
|
|
{
|
|
struct pv88060_regulator *info = rdev_get_drvdata(rdev);
|
|
int val = 0;
|
|
|
|
switch (mode) {
|
|
case REGULATOR_MODE_FAST:
|
|
val = PV88060_BUCK_MODE_SYNC;
|
|
break;
|
|
case REGULATOR_MODE_NORMAL:
|
|
val = PV88060_BUCK_MODE_AUTO;
|
|
break;
|
|
case REGULATOR_MODE_STANDBY:
|
|
val = PV88060_BUCK_MODE_SLEEP;
|
|
break;
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
|
|
return regmap_update_bits(rdev->regmap, info->conf,
|
|
PV88060_BUCK_MODE_MASK, val);
|
|
}
|
|
|
|
static const struct regulator_ops pv88060_buck_ops = {
|
|
.get_mode = pv88060_buck_get_mode,
|
|
.set_mode = pv88060_buck_set_mode,
|
|
.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,
|
|
};
|
|
|
|
static const struct regulator_ops pv88060_ldo_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,
|
|
};
|
|
|
|
static const struct regulator_ops pv88060_sw_ops = {
|
|
.enable = regulator_enable_regmap,
|
|
.disable = regulator_disable_regmap,
|
|
.is_enabled = regulator_is_enabled_regmap,
|
|
};
|
|
|
|
#define PV88060_BUCK(chip, regl_name, min, step, max, limits_array) \
|
|
{\
|
|
.desc = {\
|
|
.id = chip##_ID_##regl_name,\
|
|
.name = __stringify(chip##_##regl_name),\
|
|
.of_match = of_match_ptr(#regl_name),\
|
|
.regulators_node = of_match_ptr("regulators"),\
|
|
.type = REGULATOR_VOLTAGE,\
|
|
.owner = THIS_MODULE,\
|
|
.ops = &pv88060_buck_ops,\
|
|
.min_uV = min,\
|
|
.uV_step = step,\
|
|
.n_voltages = ((max) - (min))/(step) + 1,\
|
|
.enable_reg = PV88060_REG_##regl_name##_CONF0,\
|
|
.enable_mask = PV88060_BUCK_EN, \
|
|
.vsel_reg = PV88060_REG_##regl_name##_CONF0,\
|
|
.vsel_mask = PV88060_VBUCK_MASK,\
|
|
.curr_table = limits_array,\
|
|
.n_current_limits = ARRAY_SIZE(limits_array),\
|
|
.csel_reg = PV88060_REG_##regl_name##_CONF1,\
|
|
.csel_mask = PV88060_BUCK_ILIM_MASK,\
|
|
},\
|
|
.conf = PV88060_REG_##regl_name##_CONF1,\
|
|
}
|
|
|
|
#define PV88060_LDO(chip, regl_name, min, step, max) \
|
|
{\
|
|
.desc = {\
|
|
.id = chip##_ID_##regl_name,\
|
|
.name = __stringify(chip##_##regl_name),\
|
|
.of_match = of_match_ptr(#regl_name),\
|
|
.regulators_node = of_match_ptr("regulators"),\
|
|
.type = REGULATOR_VOLTAGE,\
|
|
.owner = THIS_MODULE,\
|
|
.ops = &pv88060_ldo_ops,\
|
|
.min_uV = min, \
|
|
.uV_step = step, \
|
|
.n_voltages = (step) ? ((max - min) / step + 1) : 1, \
|
|
.enable_reg = PV88060_REG_##regl_name##_CONF, \
|
|
.enable_mask = PV88060_LDO_EN, \
|
|
.vsel_reg = PV88060_REG_##regl_name##_CONF, \
|
|
.vsel_mask = PV88060_VLDO_MASK, \
|
|
},\
|
|
}
|
|
|
|
#define PV88060_SW(chip, regl_name, max) \
|
|
{\
|
|
.desc = {\
|
|
.id = chip##_ID_##regl_name,\
|
|
.name = __stringify(chip##_##regl_name),\
|
|
.of_match = of_match_ptr(#regl_name),\
|
|
.regulators_node = of_match_ptr("regulators"),\
|
|
.type = REGULATOR_VOLTAGE,\
|
|
.owner = THIS_MODULE,\
|
|
.ops = &pv88060_sw_ops,\
|
|
.fixed_uV = max,\
|
|
.n_voltages = 1,\
|
|
.enable_reg = PV88060_REG_##regl_name##_CONF,\
|
|
.enable_mask = PV88060_SW_EN,\
|
|
},\
|
|
}
|
|
|
|
static const struct pv88060_regulator pv88060_regulator_info[] = {
|
|
PV88060_BUCK(PV88060, BUCK1, 2800000, 12500, 4387500,
|
|
pv88060_buck1_limits),
|
|
PV88060_LDO(PV88060, LDO1, 1200000, 50000, 3350000),
|
|
PV88060_LDO(PV88060, LDO2, 1200000, 50000, 3350000),
|
|
PV88060_LDO(PV88060, LDO3, 1200000, 50000, 3350000),
|
|
PV88060_LDO(PV88060, LDO4, 1200000, 50000, 3350000),
|
|
PV88060_LDO(PV88060, LDO5, 1200000, 50000, 3350000),
|
|
PV88060_LDO(PV88060, LDO6, 1200000, 50000, 3350000),
|
|
PV88060_LDO(PV88060, LDO7, 1200000, 50000, 3350000),
|
|
PV88060_SW(PV88060, SW1, 5000000),
|
|
PV88060_SW(PV88060, SW2, 5000000),
|
|
PV88060_SW(PV88060, SW3, 5000000),
|
|
PV88060_SW(PV88060, SW4, 5000000),
|
|
PV88060_SW(PV88060, SW5, 5000000),
|
|
PV88060_SW(PV88060, SW6, 5000000),
|
|
};
|
|
|
|
static irqreturn_t pv88060_irq_handler(int irq, void *data)
|
|
{
|
|
struct pv88060 *chip = data;
|
|
int i, reg_val, err, ret = IRQ_NONE;
|
|
|
|
err = regmap_read(chip->regmap, PV88060_REG_EVENT_A, ®_val);
|
|
if (err < 0)
|
|
goto error_i2c;
|
|
|
|
if (reg_val & PV88060_E_VDD_FLT) {
|
|
for (i = 0; i < PV88060_MAX_REGULATORS; i++) {
|
|
if (chip->rdev[i] != NULL)
|
|
regulator_notifier_call_chain(chip->rdev[i],
|
|
REGULATOR_EVENT_UNDER_VOLTAGE,
|
|
NULL);
|
|
}
|
|
|
|
err = regmap_write(chip->regmap, PV88060_REG_EVENT_A,
|
|
PV88060_E_VDD_FLT);
|
|
if (err < 0)
|
|
goto error_i2c;
|
|
|
|
ret = IRQ_HANDLED;
|
|
}
|
|
|
|
if (reg_val & PV88060_E_OVER_TEMP) {
|
|
for (i = 0; i < PV88060_MAX_REGULATORS; i++) {
|
|
if (chip->rdev[i] != NULL)
|
|
regulator_notifier_call_chain(chip->rdev[i],
|
|
REGULATOR_EVENT_OVER_TEMP,
|
|
NULL);
|
|
}
|
|
|
|
err = regmap_write(chip->regmap, PV88060_REG_EVENT_A,
|
|
PV88060_E_OVER_TEMP);
|
|
if (err < 0)
|
|
goto error_i2c;
|
|
|
|
ret = IRQ_HANDLED;
|
|
}
|
|
|
|
return ret;
|
|
|
|
error_i2c:
|
|
dev_err(chip->dev, "I2C error : %d\n", err);
|
|
return IRQ_NONE;
|
|
}
|
|
|
|
/*
|
|
* I2C driver interface functions
|
|
*/
|
|
static int pv88060_i2c_probe(struct i2c_client *i2c)
|
|
{
|
|
struct regulator_init_data *init_data = dev_get_platdata(&i2c->dev);
|
|
struct pv88060 *chip;
|
|
struct regulator_config config = { };
|
|
int error, i, ret = 0;
|
|
|
|
chip = devm_kzalloc(&i2c->dev, sizeof(struct pv88060), GFP_KERNEL);
|
|
if (!chip)
|
|
return -ENOMEM;
|
|
|
|
chip->dev = &i2c->dev;
|
|
chip->regmap = devm_regmap_init_i2c(i2c, &pv88060_regmap_config);
|
|
if (IS_ERR(chip->regmap)) {
|
|
error = PTR_ERR(chip->regmap);
|
|
dev_err(chip->dev, "Failed to allocate register map: %d\n",
|
|
error);
|
|
return error;
|
|
}
|
|
|
|
i2c_set_clientdata(i2c, chip);
|
|
|
|
if (i2c->irq != 0) {
|
|
ret = regmap_write(chip->regmap, PV88060_REG_MASK_A, 0xFF);
|
|
if (ret < 0) {
|
|
dev_err(chip->dev,
|
|
"Failed to mask A reg: %d\n", ret);
|
|
return ret;
|
|
}
|
|
|
|
ret = regmap_write(chip->regmap, PV88060_REG_MASK_B, 0xFF);
|
|
if (ret < 0) {
|
|
dev_err(chip->dev,
|
|
"Failed to mask B reg: %d\n", ret);
|
|
return ret;
|
|
}
|
|
|
|
ret = regmap_write(chip->regmap, PV88060_REG_MASK_C, 0xFF);
|
|
if (ret < 0) {
|
|
dev_err(chip->dev,
|
|
"Failed to mask C reg: %d\n", ret);
|
|
return ret;
|
|
}
|
|
|
|
ret = devm_request_threaded_irq(&i2c->dev, i2c->irq, NULL,
|
|
pv88060_irq_handler,
|
|
IRQF_TRIGGER_LOW|IRQF_ONESHOT,
|
|
"pv88060", chip);
|
|
if (ret != 0) {
|
|
dev_err(chip->dev, "Failed to request IRQ: %d\n",
|
|
i2c->irq);
|
|
return ret;
|
|
}
|
|
|
|
ret = regmap_update_bits(chip->regmap, PV88060_REG_MASK_A,
|
|
PV88060_M_VDD_FLT | PV88060_M_OVER_TEMP, 0);
|
|
if (ret < 0) {
|
|
dev_err(chip->dev,
|
|
"Failed to update mask reg: %d\n", ret);
|
|
return ret;
|
|
}
|
|
|
|
} else {
|
|
dev_warn(chip->dev, "No IRQ configured\n");
|
|
}
|
|
|
|
config.dev = chip->dev;
|
|
config.regmap = chip->regmap;
|
|
|
|
for (i = 0; i < PV88060_MAX_REGULATORS; i++) {
|
|
if (init_data)
|
|
config.init_data = &init_data[i];
|
|
|
|
config.driver_data = (void *)&pv88060_regulator_info[i];
|
|
chip->rdev[i] = devm_regulator_register(chip->dev,
|
|
&pv88060_regulator_info[i].desc, &config);
|
|
if (IS_ERR(chip->rdev[i])) {
|
|
dev_err(chip->dev,
|
|
"Failed to register PV88060 regulator\n");
|
|
return PTR_ERR(chip->rdev[i]);
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct i2c_device_id pv88060_i2c_id[] = {
|
|
{"pv88060", 0},
|
|
{},
|
|
};
|
|
MODULE_DEVICE_TABLE(i2c, pv88060_i2c_id);
|
|
|
|
#ifdef CONFIG_OF
|
|
static const struct of_device_id pv88060_dt_ids[] = {
|
|
{ .compatible = "pvs,pv88060", .data = &pv88060_i2c_id[0] },
|
|
{},
|
|
};
|
|
MODULE_DEVICE_TABLE(of, pv88060_dt_ids);
|
|
#endif
|
|
|
|
static struct i2c_driver pv88060_regulator_driver = {
|
|
.driver = {
|
|
.name = "pv88060",
|
|
.probe_type = PROBE_PREFER_ASYNCHRONOUS,
|
|
.of_match_table = of_match_ptr(pv88060_dt_ids),
|
|
},
|
|
.probe_new = pv88060_i2c_probe,
|
|
.id_table = pv88060_i2c_id,
|
|
};
|
|
|
|
module_i2c_driver(pv88060_regulator_driver);
|
|
|
|
MODULE_AUTHOR("James Ban <James.Ban.opensource@diasemi.com>");
|
|
MODULE_DESCRIPTION("Regulator device driver for Powerventure PV88060");
|
|
MODULE_LICENSE("GPL");
|