diff options
Diffstat (limited to 'drivers/regulator/adp5055-regulator.c')
| -rw-r--r-- | drivers/regulator/adp5055-regulator.c | 424 |
1 files changed, 424 insertions, 0 deletions
diff --git a/drivers/regulator/adp5055-regulator.c b/drivers/regulator/adp5055-regulator.c new file mode 100644 index 000000000000..4b004a6b2f84 --- /dev/null +++ b/drivers/regulator/adp5055-regulator.c @@ -0,0 +1,424 @@ +// SPDX-License-Identifier: GPL-2.0 +// +// Regulator driver for Analog Devices ADP5055 +// +// Copyright (C) 2025 Analog Devices, Inc. + +#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> + +// ADP5055 Register Map. + +#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 + +// ADP5055 Field Masks. + +#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"); |