diff options
Diffstat (limited to 'drivers/regulator/pv88080-regulator.c')
| -rw-r--r-- | drivers/regulator/pv88080-regulator.c | 571 |
1 files changed, 571 insertions, 0 deletions
diff --git a/drivers/regulator/pv88080-regulator.c b/drivers/regulator/pv88080-regulator.c new file mode 100644 index 000000000..7ab3e4a9b --- /dev/null +++ b/drivers/regulator/pv88080-regulator.c @@ -0,0 +1,571 @@ +// SPDX-License-Identifier: GPL-2.0+ +// +// pv88080-regulator.c - Regulator device driver for PV88080 +// Copyright (C) 2016 Powerventure Semiconductor Ltd. + +#include <linux/err.h> +#include <linux/i2c.h> +#include <linux/module.h> +#include <linux/of.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 "pv88080-regulator.h" + +#define PV88080_MAX_REGULATORS 4 + +/* PV88080 REGULATOR IDs */ +enum { + /* BUCKs */ + PV88080_ID_BUCK1, + PV88080_ID_BUCK2, + PV88080_ID_BUCK3, + PV88080_ID_HVBUCK, +}; + +enum pv88080_types { + TYPE_PV88080_AA, + TYPE_PV88080_BA, +}; + +struct pv88080_regulator { + struct regulator_desc desc; + unsigned int mode_reg; + unsigned int conf2; + unsigned int conf5; +}; + +struct pv88080 { + struct device *dev; + struct regmap *regmap; + struct regulator_dev *rdev[PV88080_MAX_REGULATORS]; + unsigned long type; + const struct pv88080_compatible_regmap *regmap_config; +}; + +struct pv88080_buck_voltage { + int min_uV; + int max_uV; + int uV_step; +}; + +struct pv88080_buck_regmap { + /* REGS */ + int buck_enable_reg; + int buck_vsel_reg; + int buck_mode_reg; + int buck_limit_reg; + int buck_vdac_range_reg; + int buck_vrange_gain_reg; + /* MASKS */ + int buck_enable_mask; + int buck_vsel_mask; + int buck_limit_mask; +}; + +struct pv88080_compatible_regmap { + /* BUCK1, 2, 3 */ + struct pv88080_buck_regmap buck_regmap[PV88080_MAX_REGULATORS-1]; + /* HVBUCK */ + int hvbuck_enable_reg; + int hvbuck_vsel_reg; + int hvbuck_enable_mask; + int hvbuck_vsel_mask; +}; + +static const struct regmap_config pv88080_regmap_config = { + .reg_bits = 8, + .val_bits = 8, +}; + +/* Current limits array (in uA) for BUCK1, BUCK2, BUCK3. + * Entry indexes corresponds to register values. + */ + +static const unsigned int pv88080_buck1_limits[] = { + 3230000, 5130000, 6960000, 8790000 +}; + +static const unsigned int pv88080_buck23_limits[] = { + 1496000, 2393000, 3291000, 4189000 +}; + +static const struct pv88080_buck_voltage pv88080_buck_vol[2] = { + { + .min_uV = 600000, + .max_uV = 1393750, + .uV_step = 6250, + }, + { + .min_uV = 1400000, + .max_uV = 2193750, + .uV_step = 6250, + }, +}; + +static const struct pv88080_compatible_regmap pv88080_aa_regs = { + /* BUCK1 */ + .buck_regmap[0] = { + .buck_enable_reg = PV88080AA_REG_BUCK1_CONF0, + .buck_vsel_reg = PV88080AA_REG_BUCK1_CONF0, + .buck_mode_reg = PV88080AA_REG_BUCK1_CONF1, + .buck_limit_reg = PV88080AA_REG_BUCK1_CONF1, + .buck_vdac_range_reg = PV88080AA_REG_BUCK1_CONF2, + .buck_vrange_gain_reg = PV88080AA_REG_BUCK1_CONF5, + .buck_enable_mask = PV88080_BUCK1_EN, + .buck_vsel_mask = PV88080_VBUCK1_MASK, + .buck_limit_mask = PV88080_BUCK1_ILIM_MASK, + }, + /* BUCK2 */ + .buck_regmap[1] = { + .buck_enable_reg = PV88080AA_REG_BUCK2_CONF0, + .buck_vsel_reg = PV88080AA_REG_BUCK2_CONF0, + .buck_mode_reg = PV88080AA_REG_BUCK2_CONF1, + .buck_limit_reg = PV88080AA_REG_BUCK2_CONF1, + .buck_vdac_range_reg = PV88080AA_REG_BUCK2_CONF2, + .buck_vrange_gain_reg = PV88080AA_REG_BUCK2_CONF5, + .buck_enable_mask = PV88080_BUCK2_EN, + .buck_vsel_mask = PV88080_VBUCK2_MASK, + .buck_limit_mask = PV88080_BUCK2_ILIM_MASK, + }, + /* BUCK3 */ + .buck_regmap[2] = { + .buck_enable_reg = PV88080AA_REG_BUCK3_CONF0, + .buck_vsel_reg = PV88080AA_REG_BUCK3_CONF0, + .buck_mode_reg = PV88080AA_REG_BUCK3_CONF1, + .buck_limit_reg = PV88080AA_REG_BUCK3_CONF1, + .buck_vdac_range_reg = PV88080AA_REG_BUCK3_CONF2, + .buck_vrange_gain_reg = PV88080AA_REG_BUCK3_CONF5, + .buck_enable_mask = PV88080_BUCK3_EN, + .buck_vsel_mask = PV88080_VBUCK3_MASK, + .buck_limit_mask = PV88080_BUCK3_ILIM_MASK, + }, + /* HVBUCK */ + .hvbuck_enable_reg = PV88080AA_REG_HVBUCK_CONF2, + .hvbuck_vsel_reg = PV88080AA_REG_HVBUCK_CONF1, + .hvbuck_enable_mask = PV88080_HVBUCK_EN, + .hvbuck_vsel_mask = PV88080_VHVBUCK_MASK, +}; + +static const struct pv88080_compatible_regmap pv88080_ba_regs = { + /* BUCK1 */ + .buck_regmap[0] = { + .buck_enable_reg = PV88080BA_REG_BUCK1_CONF0, + .buck_vsel_reg = PV88080BA_REG_BUCK1_CONF0, + .buck_mode_reg = PV88080BA_REG_BUCK1_CONF1, + .buck_limit_reg = PV88080BA_REG_BUCK1_CONF1, + .buck_vdac_range_reg = PV88080BA_REG_BUCK1_CONF2, + .buck_vrange_gain_reg = PV88080BA_REG_BUCK1_CONF5, + .buck_enable_mask = PV88080_BUCK1_EN, + .buck_vsel_mask = PV88080_VBUCK1_MASK, + .buck_limit_mask = PV88080_BUCK1_ILIM_MASK, + }, + /* BUCK2 */ + .buck_regmap[1] = { + .buck_enable_reg = PV88080BA_REG_BUCK2_CONF0, + .buck_vsel_reg = PV88080BA_REG_BUCK2_CONF0, + .buck_mode_reg = PV88080BA_REG_BUCK2_CONF1, + .buck_limit_reg = PV88080BA_REG_BUCK2_CONF1, + .buck_vdac_range_reg = PV88080BA_REG_BUCK2_CONF2, + .buck_vrange_gain_reg = PV88080BA_REG_BUCK2_CONF5, + .buck_enable_mask = PV88080_BUCK2_EN, + .buck_vsel_mask = PV88080_VBUCK2_MASK, + .buck_limit_mask = PV88080_BUCK2_ILIM_MASK, + }, + /* BUCK3 */ + .buck_regmap[2] = { + .buck_enable_reg = PV88080BA_REG_BUCK3_CONF0, + .buck_vsel_reg = PV88080BA_REG_BUCK3_CONF0, + .buck_mode_reg = PV88080BA_REG_BUCK3_CONF1, + .buck_limit_reg = PV88080BA_REG_BUCK3_CONF1, + .buck_vdac_range_reg = PV88080BA_REG_BUCK3_CONF2, + .buck_vrange_gain_reg = PV88080BA_REG_BUCK3_CONF5, + .buck_enable_mask = PV88080_BUCK3_EN, + .buck_vsel_mask = PV88080_VBUCK3_MASK, + .buck_limit_mask = PV88080_BUCK3_ILIM_MASK, + }, + /* HVBUCK */ + .hvbuck_enable_reg = PV88080BA_REG_HVBUCK_CONF2, + .hvbuck_vsel_reg = PV88080BA_REG_HVBUCK_CONF1, + .hvbuck_enable_mask = PV88080_HVBUCK_EN, + .hvbuck_vsel_mask = PV88080_VHVBUCK_MASK, +}; + +#ifdef CONFIG_OF +static const struct of_device_id pv88080_dt_ids[] = { + { .compatible = "pvs,pv88080", .data = (void *)TYPE_PV88080_AA }, + { .compatible = "pvs,pv88080-aa", .data = (void *)TYPE_PV88080_AA }, + { .compatible = "pvs,pv88080-ba", .data = (void *)TYPE_PV88080_BA }, + {}, +}; +MODULE_DEVICE_TABLE(of, pv88080_dt_ids); +#endif + +static unsigned int pv88080_buck_get_mode(struct regulator_dev *rdev) +{ + struct pv88080_regulator *info = rdev_get_drvdata(rdev); + unsigned int data; + int ret, mode = 0; + + ret = regmap_read(rdev->regmap, info->mode_reg, &data); + if (ret < 0) + return ret; + + switch (data & PV88080_BUCK1_MODE_MASK) { + case PV88080_BUCK_MODE_SYNC: + mode = REGULATOR_MODE_FAST; + break; + case PV88080_BUCK_MODE_AUTO: + mode = REGULATOR_MODE_NORMAL; + break; + case PV88080_BUCK_MODE_SLEEP: + mode = REGULATOR_MODE_STANDBY; + break; + default: + return -EINVAL; + } + + return mode; +} + +static int pv88080_buck_set_mode(struct regulator_dev *rdev, + unsigned int mode) +{ + struct pv88080_regulator *info = rdev_get_drvdata(rdev); + int val = 0; + + switch (mode) { + case REGULATOR_MODE_FAST: + val = PV88080_BUCK_MODE_SYNC; + break; + case REGULATOR_MODE_NORMAL: + val = PV88080_BUCK_MODE_AUTO; + break; + case REGULATOR_MODE_STANDBY: + val = PV88080_BUCK_MODE_SLEEP; + break; + default: + return -EINVAL; + } + + return regmap_update_bits(rdev->regmap, info->mode_reg, + PV88080_BUCK1_MODE_MASK, val); +} + +static const struct regulator_ops pv88080_buck_ops = { + .get_mode = pv88080_buck_get_mode, + .set_mode = pv88080_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 pv88080_hvbuck_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, +}; + +#define PV88080_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 = &pv88080_buck_ops,\ + .min_uV = min, \ + .uV_step = step, \ + .n_voltages = ((max) - (min))/(step) + 1, \ + .curr_table = limits_array, \ + .n_current_limits = ARRAY_SIZE(limits_array), \ + },\ +} + +#define PV88080_HVBUCK(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 = &pv88080_hvbuck_ops,\ + .min_uV = min, \ + .uV_step = step, \ + .n_voltages = ((max) - (min))/(step) + 1, \ + },\ +} + +static struct pv88080_regulator pv88080_regulator_info[] = { + PV88080_BUCK(PV88080, BUCK1, 600000, 6250, 1393750, + pv88080_buck1_limits), + PV88080_BUCK(PV88080, BUCK2, 600000, 6250, 1393750, + pv88080_buck23_limits), + PV88080_BUCK(PV88080, BUCK3, 600000, 6250, 1393750, + pv88080_buck23_limits), + PV88080_HVBUCK(PV88080, HVBUCK, 0, 5000, 1275000), +}; + +static irqreturn_t pv88080_irq_handler(int irq, void *data) +{ + struct pv88080 *chip = data; + int i, reg_val, err, ret = IRQ_NONE; + + err = regmap_read(chip->regmap, PV88080_REG_EVENT_A, ®_val); + if (err < 0) + goto error_i2c; + + if (reg_val & PV88080_E_VDD_FLT) { + for (i = 0; i < PV88080_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, PV88080_REG_EVENT_A, + PV88080_E_VDD_FLT); + if (err < 0) + goto error_i2c; + + ret = IRQ_HANDLED; + } + + if (reg_val & PV88080_E_OVER_TEMP) { + for (i = 0; i < PV88080_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, PV88080_REG_EVENT_A, + PV88080_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 pv88080_i2c_probe(struct i2c_client *i2c) +{ + const struct i2c_device_id *id = i2c_client_get_device_id(i2c); + struct regulator_init_data *init_data = dev_get_platdata(&i2c->dev); + struct pv88080 *chip; + const struct pv88080_compatible_regmap *regmap_config; + const struct of_device_id *match; + struct regulator_config config = { }; + int i, error, ret; + unsigned int conf2, conf5; + + chip = devm_kzalloc(&i2c->dev, sizeof(struct pv88080), GFP_KERNEL); + if (!chip) + return -ENOMEM; + + chip->dev = &i2c->dev; + chip->regmap = devm_regmap_init_i2c(i2c, &pv88080_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; + } + + if (i2c->dev.of_node) { + match = of_match_node(pv88080_dt_ids, i2c->dev.of_node); + if (!match) { + dev_err(chip->dev, "Failed to get of_match_node\n"); + return -EINVAL; + } + chip->type = (unsigned long)match->data; + } else { + chip->type = id->driver_data; + } + + i2c_set_clientdata(i2c, chip); + + if (i2c->irq != 0) { + ret = regmap_write(chip->regmap, PV88080_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, PV88080_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, PV88080_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, + pv88080_irq_handler, + IRQF_TRIGGER_LOW|IRQF_ONESHOT, + "pv88080", chip); + if (ret != 0) { + dev_err(chip->dev, "Failed to request IRQ: %d\n", + i2c->irq); + return ret; + } + + ret = regmap_update_bits(chip->regmap, PV88080_REG_MASK_A, + PV88080_M_VDD_FLT | PV88080_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"); + } + + switch (chip->type) { + case TYPE_PV88080_AA: + chip->regmap_config = &pv88080_aa_regs; + break; + case TYPE_PV88080_BA: + chip->regmap_config = &pv88080_ba_regs; + break; + } + + regmap_config = chip->regmap_config; + config.dev = chip->dev; + config.regmap = chip->regmap; + + /* Registeration for BUCK1, 2, 3 */ + for (i = 0; i < PV88080_MAX_REGULATORS-1; i++) { + if (init_data) + config.init_data = &init_data[i]; + + pv88080_regulator_info[i].desc.csel_reg + = regmap_config->buck_regmap[i].buck_limit_reg; + pv88080_regulator_info[i].desc.csel_mask + = regmap_config->buck_regmap[i].buck_limit_mask; + pv88080_regulator_info[i].mode_reg + = regmap_config->buck_regmap[i].buck_mode_reg; + pv88080_regulator_info[i].conf2 + = regmap_config->buck_regmap[i].buck_vdac_range_reg; + pv88080_regulator_info[i].conf5 + = regmap_config->buck_regmap[i].buck_vrange_gain_reg; + pv88080_regulator_info[i].desc.enable_reg + = regmap_config->buck_regmap[i].buck_enable_reg; + pv88080_regulator_info[i].desc.enable_mask + = regmap_config->buck_regmap[i].buck_enable_mask; + pv88080_regulator_info[i].desc.vsel_reg + = regmap_config->buck_regmap[i].buck_vsel_reg; + pv88080_regulator_info[i].desc.vsel_mask + = regmap_config->buck_regmap[i].buck_vsel_mask; + + ret = regmap_read(chip->regmap, + pv88080_regulator_info[i].conf2, &conf2); + if (ret < 0) + return ret; + conf2 = ((conf2 >> PV88080_BUCK_VDAC_RANGE_SHIFT) & + PV88080_BUCK_VDAC_RANGE_MASK); + + ret = regmap_read(chip->regmap, + pv88080_regulator_info[i].conf5, &conf5); + if (ret < 0) + return ret; + conf5 = ((conf5 >> PV88080_BUCK_VRANGE_GAIN_SHIFT) & + PV88080_BUCK_VRANGE_GAIN_MASK); + + pv88080_regulator_info[i].desc.min_uV = + pv88080_buck_vol[conf2].min_uV * (conf5+1); + pv88080_regulator_info[i].desc.uV_step = + pv88080_buck_vol[conf2].uV_step * (conf5+1); + pv88080_regulator_info[i].desc.n_voltages = + ((pv88080_buck_vol[conf2].max_uV * (conf5+1)) + - (pv88080_regulator_info[i].desc.min_uV)) + /(pv88080_regulator_info[i].desc.uV_step) + 1; + + config.driver_data = (void *)&pv88080_regulator_info[i]; + chip->rdev[i] = devm_regulator_register(chip->dev, + &pv88080_regulator_info[i].desc, &config); + if (IS_ERR(chip->rdev[i])) { + dev_err(chip->dev, + "Failed to register PV88080 regulator\n"); + return PTR_ERR(chip->rdev[i]); + } + } + + pv88080_regulator_info[PV88080_ID_HVBUCK].desc.enable_reg + = regmap_config->hvbuck_enable_reg; + pv88080_regulator_info[PV88080_ID_HVBUCK].desc.enable_mask + = regmap_config->hvbuck_enable_mask; + pv88080_regulator_info[PV88080_ID_HVBUCK].desc.vsel_reg + = regmap_config->hvbuck_vsel_reg; + pv88080_regulator_info[PV88080_ID_HVBUCK].desc.vsel_mask + = regmap_config->hvbuck_vsel_mask; + + /* Registeration for HVBUCK */ + if (init_data) + config.init_data = &init_data[PV88080_ID_HVBUCK]; + + config.driver_data = (void *)&pv88080_regulator_info[PV88080_ID_HVBUCK]; + chip->rdev[PV88080_ID_HVBUCK] = devm_regulator_register(chip->dev, + &pv88080_regulator_info[PV88080_ID_HVBUCK].desc, &config); + if (IS_ERR(chip->rdev[PV88080_ID_HVBUCK])) { + dev_err(chip->dev, "Failed to register PV88080 regulator\n"); + return PTR_ERR(chip->rdev[PV88080_ID_HVBUCK]); + } + + return 0; +} + +static const struct i2c_device_id pv88080_i2c_id[] = { + { "pv88080", TYPE_PV88080_AA }, + { "pv88080-aa", TYPE_PV88080_AA }, + { "pv88080-ba", TYPE_PV88080_BA }, + {}, +}; +MODULE_DEVICE_TABLE(i2c, pv88080_i2c_id); + +static struct i2c_driver pv88080_regulator_driver = { + .driver = { + .name = "pv88080", + .probe_type = PROBE_PREFER_ASYNCHRONOUS, + .of_match_table = of_match_ptr(pv88080_dt_ids), + }, + .probe = pv88080_i2c_probe, + .id_table = pv88080_i2c_id, +}; + +module_i2c_driver(pv88080_regulator_driver); + +MODULE_AUTHOR("James Ban <James.Ban.opensource@diasemi.com>"); +MODULE_DESCRIPTION("Regulator device driver for Powerventure PV88080"); +MODULE_LICENSE("GPL"); |