#include <linux/bitfield.h>
#include <linux/device.h>
#include <linux/gpio/consumer.h>
#include <linux/i2c.h>
#include <linux/module.h>
#include <linux/mod_devicetable.h>
#include <linux/regmap.h>
#include <linux/regulator/driver.h>
#include <linux/regulator/machine.h>
#include <linux/regulator/of_regulator.h>
#define ADP5055_CTRL123 0xD1
#define ADP5055_CTRL_MODE1 0xD3
#define ADP5055_CTRL_MODE2 0xD4
#define ADP5055_DLY0 0xD5
#define ADP5055_DLY1 0xD6
#define ADP5055_DLY2 0xD7
#define ADP5055_VID0 0xD8
#define ADP5055_VID1 0xD9
#define ADP5055_VID2 0xDA
#define ADP5055_DVS_LIM0 0xDC
#define ADP5055_DVS_LIM1 0xDD
#define ADP5055_DVS_LIM2 0xDE
#define ADP5055_FT_CFG 0xDF
#define ADP5055_PG_CFG 0xE0
#define ADP5055_MASK_EN_MODE BIT(0)
#define ADP5055_MASK_OCP_BLANKING BIT(7)
#define ADP5055_MASK_PSM BIT(4)
#define ADP5055_MASK_DIS2 BIT(2)
#define ADP5055_MASK_DIS1 BIT(1)
#define ADP5055_MASK_DIS0 BIT(0)
#define ADP5055_MASK_DIS_DLY GENMASK(6, 4)
#define ADP5055_MASK_EN_DLY GENMASK(2, 0)
#define ADP5055_MASK_DVS_LIM_UPPER GENMASK(7, 4)
#define ADP5055_MASK_DVS_LIM_LOWER GENMASK(3, 0)
#define ADP5055_MASK_FAST_TRANSIENT2 GENMASK(5, 4)
#define ADP5055_MASK_FAST_TRANSIENT1 GENMASK(3, 2)
#define ADP5055_MASK_FAST_TRANSIENT0 GENMASK(1, 0)
#define ADP5055_MASK_DLY_PWRGD BIT(4)
#define ADP5055_MASK_PWRGD2 BIT(2)
#define ADP5055_MASK_PWRGD1 BIT(1)
#define ADP5055_MASK_PWRGD0 BIT(0)
#define ADP5055_MIN_VOUT 408000
#define ADP5055_NUM_CH 3
struct adp5055 {
struct device *dev;
struct regmap *regmap;
u32 tset;
struct gpio_desc *en_gpiod[ADP5055_NUM_CH];
bool en_mode_software;
int dvs_limit_upper[ADP5055_NUM_CH];
int dvs_limit_lower[ADP5055_NUM_CH];
u32 fast_transient[ADP5055_NUM_CH];
bool mask_power_good[ADP5055_NUM_CH];
};
static const unsigned int adp5055_tset_vals[] = {
2600,
20800,
};
static const unsigned int adp5055_enable_delay_vals_2_6[] = {
0,
2600,
5200,
7800,
10400,
13000,
15600,
18200,
};
static const unsigned int adp5055_enable_delay_vals_20_8[] = {
0,
20800,
41600,
62400,
83200,
104000,
124800,
145600,
};
static const char * const adp5055_fast_transient_vals[] = {
"none",
"3G_1.5%",
"5G_1.5%",
"5G_2.5%",
};
static int adp5055_get_prop_index(const u32 *table, size_t table_size,
u32 value)
{
int i;
for (i = 0; i < table_size; i++)
if (table[i] == value)
return i;
return -EINVAL;
}
static const struct regmap_range adp5055_reg_ranges[] = {
regmap_reg_range(0xD1, 0xE0),
};
static const struct regmap_access_table adp5055_access_ranges_table = {
.yes_ranges = adp5055_reg_ranges,
.n_yes_ranges = ARRAY_SIZE(adp5055_reg_ranges),
};
static const struct regmap_config adp5055_regmap_config = {
.reg_bits = 8,
.val_bits = 8,
.max_register = 0xE0,
.wr_table = &adp5055_access_ranges_table,
.rd_table = &adp5055_access_ranges_table,
};
static const struct linear_range adp5055_voltage_ranges[] = {
REGULATOR_LINEAR_RANGE(ADP5055_MIN_VOUT, 0, 255, 1500),
};
static int adp5055_parse_fw(struct device *dev, struct adp5055 *adp5055)
{
int i, ret;
struct regmap *regmap = adp5055->regmap;
int val;
bool ocp_blanking;
bool delay_power_good;
ret = device_property_read_u32(dev, "adi,tset-us", &adp5055->tset);
if (!ret) {
ret = adp5055_get_prop_index(adp5055_tset_vals,
ARRAY_SIZE(adp5055_tset_vals), adp5055->tset);
if (ret < 0)
return dev_err_probe(dev, ret,
"Failed to initialize tset.");
adp5055->tset = adp5055_tset_vals[ret];
}
ocp_blanking = device_property_read_bool(dev, "adi,ocp-blanking");
delay_power_good = device_property_read_bool(dev,
"adi,delay-power-good");
for (i = 0; i < ADP5055_NUM_CH; i++) {
val = FIELD_PREP(ADP5055_MASK_DVS_LIM_UPPER,
DIV_ROUND_CLOSEST_ULL(192000 - adp5055->dvs_limit_upper[i], 12000));
val |= FIELD_PREP(ADP5055_MASK_DVS_LIM_LOWER,
DIV_ROUND_CLOSEST_ULL(adp5055->dvs_limit_lower[i] + 190500, 12000));
ret = regmap_write(regmap, ADP5055_DVS_LIM0 + i, val);
if (ret)
return ret;
}
val = FIELD_PREP(ADP5055_MASK_EN_MODE, adp5055->en_mode_software);
ret = regmap_write(regmap, ADP5055_CTRL_MODE1, val);
if (ret)
return ret;
val = FIELD_PREP(ADP5055_MASK_OCP_BLANKING, ocp_blanking);
ret = regmap_update_bits(regmap, ADP5055_CTRL_MODE2,
ADP5055_MASK_OCP_BLANKING, val);
if (ret)
return ret;
val = FIELD_PREP(ADP5055_MASK_FAST_TRANSIENT2, adp5055->fast_transient[2]);
val |= FIELD_PREP(ADP5055_MASK_FAST_TRANSIENT1, adp5055->fast_transient[1]);
val |= FIELD_PREP(ADP5055_MASK_FAST_TRANSIENT0, adp5055->fast_transient[0]);
ret = regmap_write(regmap, ADP5055_FT_CFG, val);
if (ret)
return ret;
val = FIELD_PREP(ADP5055_MASK_DLY_PWRGD, delay_power_good);
val |= FIELD_PREP(ADP5055_MASK_PWRGD2, adp5055->mask_power_good[2]);
val |= FIELD_PREP(ADP5055_MASK_PWRGD1, adp5055->mask_power_good[1]);
val |= FIELD_PREP(ADP5055_MASK_PWRGD0, adp5055->mask_power_good[0]);
ret = regmap_write(regmap, ADP5055_PG_CFG, val);
if (ret)
return ret;
return 0;
}
static int adp5055_of_parse_cb(struct device_node *np,
const struct regulator_desc *desc,
struct regulator_config *config)
{
struct adp5055 *adp5055 = config->driver_data;
int id, ret, pval, i;
id = desc->id;
if (of_property_read_bool(np, "enable-gpios")) {
adp5055->en_gpiod[id] = devm_fwnode_gpiod_get(config->dev,
of_fwnode_handle(np), "enable",
GPIOD_OUT_LOW, "enable");
if (IS_ERR(adp5055->en_gpiod[id]))
return dev_err_probe(config->dev, PTR_ERR(adp5055->en_gpiod[id]),
"Failed to get enable GPIO\n");
config->ena_gpiod = adp5055->en_gpiod[id];
} else {
adp5055->en_mode_software = true;
}
ret = of_property_read_u32(np, "adi,dvs-limit-upper-microvolt", &pval);
if (ret)
adp5055->dvs_limit_upper[id] = 192000;
else
adp5055->dvs_limit_upper[id] = pval;
if (adp5055->dvs_limit_upper[id] > 192000 || adp5055->dvs_limit_upper[id] < 12000)
return dev_err_probe(config->dev, adp5055->dvs_limit_upper[id],
"Out of range - dvs-limit-upper-microvolt value.");
ret = of_property_read_u32(np, "adi,dvs-limit-lower-microvolt", &pval);
if (ret)
adp5055->dvs_limit_lower[id] = -190500;
else
adp5055->dvs_limit_lower[id] = pval;
if (adp5055->dvs_limit_lower[id] > -10500 || adp5055->dvs_limit_lower[id] < -190500)
return dev_err_probe(config->dev, adp5055->dvs_limit_lower[id],
"Out of range - dvs-limit-lower-microvolt value.");
for (i = 0; i < 4; i++) {
ret = of_property_match_string(np, "adi,fast-transient",
adp5055_fast_transient_vals[i]);
if (!ret)
break;
}
if (ret < 0)
adp5055->fast_transient[id] = 3;
else
adp5055->fast_transient[id] = i;
adp5055->mask_power_good[id] = of_property_read_bool(np, "adi,mask-power-good");
return 0;
}
static int adp5055_set_mode(struct regulator_dev *rdev, u32 mode)
{
struct adp5055 *adp5055 = rdev_get_drvdata(rdev);
int id, ret;
id = rdev_get_id(rdev);
switch (mode) {
case REGULATOR_MODE_NORMAL:
ret = regmap_update_bits(adp5055->regmap, ADP5055_CTRL_MODE2,
ADP5055_MASK_PSM << id, 0);
break;
case REGULATOR_MODE_IDLE:
ret = regmap_update_bits(adp5055->regmap, ADP5055_CTRL_MODE2,
ADP5055_MASK_PSM << id, ADP5055_MASK_PSM << id);
break;
default:
return dev_err_probe(&rdev->dev, -EINVAL,
"Unsupported mode: %d\n", mode);
}
return ret;
}
static unsigned int adp5055_get_mode(struct regulator_dev *rdev)
{
struct adp5055 *adp5055 = rdev_get_drvdata(rdev);
int id, ret, regval;
id = rdev_get_id(rdev);
ret = regmap_read(adp5055->regmap, ADP5055_CTRL_MODE2, ®val);
if (ret)
return ret;
if (regval & (ADP5055_MASK_PSM << id))
return REGULATOR_MODE_IDLE;
else
return REGULATOR_MODE_NORMAL;
}
static const struct regulator_ops adp5055_ops = {
.list_voltage = regulator_list_voltage_linear_range,
.map_voltage = regulator_map_voltage_linear_range,
.set_voltage_sel = regulator_set_voltage_sel_regmap,
.get_voltage_sel = regulator_get_voltage_sel_regmap,
.set_active_discharge = regulator_set_active_discharge_regmap,
.enable = regulator_enable_regmap,
.disable = regulator_disable_regmap,
.is_enabled = regulator_is_enabled_regmap,
.set_mode = adp5055_set_mode,
.get_mode = adp5055_get_mode,
.set_ramp_delay = regulator_set_ramp_delay_regmap,
};
#define ADP5055_REG_(_name, _id, _ch, _ops) \
[_id] = { \
.name = _name, \
.of_match = of_match_ptr(_name), \
.of_parse_cb = adp5055_of_parse_cb, \
.id = _id, \
.ops = _ops, \
.linear_ranges = adp5055_voltage_ranges, \
.n_linear_ranges = ARRAY_SIZE(adp5055_voltage_ranges), \
.vsel_reg = ADP5055_VID##_ch, \
.vsel_mask = GENMASK(7, 0), \
.enable_reg = ADP5055_CTRL123, \
.enable_mask = BIT(_ch), \
.active_discharge_on = ADP5055_MASK_DIS##_id, \
.active_discharge_off = 0, \
.active_discharge_mask = ADP5055_MASK_DIS##_id, \
.active_discharge_reg = ADP5055_CTRL_MODE2, \
.ramp_reg = ADP5055_DLY##_ch, \
.ramp_mask = ADP5055_MASK_EN_DLY, \
.n_ramp_values = ARRAY_SIZE(adp5055_enable_delay_vals_2_6), \
.type = REGULATOR_VOLTAGE, \
.owner = THIS_MODULE, \
}
#define ADP5055_REG(_name, _id, _ch) \
ADP5055_REG_(_name, _id, _ch, &adp5055_ops)
static struct regulator_desc adp5055_regulators[] = {
ADP5055_REG("buck0", 0, 0),
ADP5055_REG("buck1", 1, 1),
ADP5055_REG("buck2", 2, 2),
};
static int adp5055_probe(struct i2c_client *client)
{
struct regulator_init_data *init_data;
struct device *dev = &client->dev;
struct adp5055 *adp5055;
int i, ret;
init_data = of_get_regulator_init_data(dev, client->dev.of_node,
&adp5055_regulators[0]);
if (!init_data)
return -EINVAL;
adp5055 = devm_kzalloc(dev, sizeof(struct adp5055), GFP_KERNEL);
if (!adp5055)
return -ENOMEM;
adp5055->tset = 2600;
adp5055->en_mode_software = false;
adp5055->regmap = devm_regmap_init_i2c(client, &adp5055_regmap_config);
if (IS_ERR(adp5055->regmap))
return dev_err_probe(dev, PTR_ERR(adp5055->regmap), "Failed to allocate reg map");
for (i = 0; i < ADP5055_NUM_CH; i++) {
const struct regulator_desc *desc;
struct regulator_config config = { };
struct regulator_dev *rdev;
if (adp5055->tset == 2600)
adp5055_regulators[i].ramp_delay_table = adp5055_enable_delay_vals_2_6;
else
adp5055_regulators[i].ramp_delay_table = adp5055_enable_delay_vals_20_8;
desc = &adp5055_regulators[i];
config.dev = dev;
config.driver_data = adp5055;
config.regmap = adp5055->regmap;
config.init_data = init_data;
rdev = devm_regulator_register(dev, desc, &config);
if (IS_ERR(rdev)) {
return dev_err_probe(dev, PTR_ERR(rdev),
"Failed to register %s\n", desc->name);
}
}
ret = adp5055_parse_fw(dev, adp5055);
if (ret < 0)
return ret;
return 0;
}
static const struct of_device_id adp5055_of_match[] = {
{ .compatible = "adi,adp5055", },
{ }
};
MODULE_DEVICE_TABLE(of, adp5055_of_match);
static const struct i2c_device_id adp5055_ids[] = {
{ .name = "adp5055"},
{ },
};
MODULE_DEVICE_TABLE(i2c, adp5055_ids);
static struct i2c_driver adp5055_driver = {
.driver = {
.name = "adp5055",
.of_match_table = adp5055_of_match,
},
.probe = adp5055_probe,
.id_table = adp5055_ids,
};
module_i2c_driver(adp5055_driver);
MODULE_DESCRIPTION("ADP5055 Voltage Regulator Driver");
MODULE_AUTHOR("Alexis Czezar Torreno <alexisczezar.torreno@analog.com>");
MODULE_LICENSE("GPL");
