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- // SPDX-License-Identifier: GPL-2.0+
- //
- // pv88090-regulator.c - Regulator device driver for PV88090
- // 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 "pv88090-regulator.h"
- #define PV88090_MAX_REGULATORS 5
- /* PV88090 REGULATOR IDs */
- enum {
- /* BUCKs */
- PV88090_ID_BUCK1,
- PV88090_ID_BUCK2,
- PV88090_ID_BUCK3,
- /* LDOs */
- PV88090_ID_LDO1,
- PV88090_ID_LDO2,
- };
- struct pv88090_regulator {
- struct regulator_desc desc;
- unsigned int conf;
- unsigned int conf2;
- };
- struct pv88090 {
- struct device *dev;
- struct regmap *regmap;
- struct regulator_dev *rdev[PV88090_MAX_REGULATORS];
- };
- struct pv88090_buck_voltage {
- int min_uV;
- int max_uV;
- int uV_step;
- };
- static const struct regmap_config pv88090_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 pv88090_buck1_limits[] = {
- 220000, 440000, 660000, 880000, 1100000, 1320000, 1540000, 1760000,
- 1980000, 2200000, 2420000, 2640000, 2860000, 3080000, 3300000, 3520000,
- 3740000, 3960000, 4180000, 4400000, 4620000, 4840000, 5060000, 5280000,
- 5500000, 5720000, 5940000, 6160000, 6380000, 6600000, 6820000, 7040000
- };
- static const unsigned int pv88090_buck23_limits[] = {
- 1496000, 2393000, 3291000, 4189000
- };
- static const struct pv88090_buck_voltage pv88090_buck_vol[3] = {
- {
- .min_uV = 600000,
- .max_uV = 1393750,
- .uV_step = 6250,
- },
- {
- .min_uV = 1400000,
- .max_uV = 2193750,
- .uV_step = 6250,
- },
- {
- .min_uV = 1250000,
- .max_uV = 2837500,
- .uV_step = 12500,
- },
- };
- static unsigned int pv88090_buck_get_mode(struct regulator_dev *rdev)
- {
- struct pv88090_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 & PV88090_BUCK1_MODE_MASK) {
- case PV88090_BUCK_MODE_SYNC:
- mode = REGULATOR_MODE_FAST;
- break;
- case PV88090_BUCK_MODE_AUTO:
- mode = REGULATOR_MODE_NORMAL;
- break;
- case PV88090_BUCK_MODE_SLEEP:
- mode = REGULATOR_MODE_STANDBY;
- break;
- }
- return mode;
- }
- static int pv88090_buck_set_mode(struct regulator_dev *rdev,
- unsigned int mode)
- {
- struct pv88090_regulator *info = rdev_get_drvdata(rdev);
- int val = 0;
- switch (mode) {
- case REGULATOR_MODE_FAST:
- val = PV88090_BUCK_MODE_SYNC;
- break;
- case REGULATOR_MODE_NORMAL:
- val = PV88090_BUCK_MODE_AUTO;
- break;
- case REGULATOR_MODE_STANDBY:
- val = PV88090_BUCK_MODE_SLEEP;
- break;
- default:
- return -EINVAL;
- }
- return regmap_update_bits(rdev->regmap, info->conf,
- PV88090_BUCK1_MODE_MASK, val);
- }
- static const struct regulator_ops pv88090_buck_ops = {
- .get_mode = pv88090_buck_get_mode,
- .set_mode = pv88090_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 pv88090_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,
- };
- #define PV88090_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 = &pv88090_buck_ops,\
- .min_uV = min, \
- .uV_step = step, \
- .n_voltages = ((max) - (min))/(step) + 1, \
- .enable_reg = PV88090_REG_##regl_name##_CONF0, \
- .enable_mask = PV88090_##regl_name##_EN, \
- .vsel_reg = PV88090_REG_##regl_name##_CONF0, \
- .vsel_mask = PV88090_V##regl_name##_MASK, \
- .curr_table = limits_array, \
- .n_current_limits = ARRAY_SIZE(limits_array), \
- .csel_reg = PV88090_REG_##regl_name##_CONF1, \
- .csel_mask = PV88090_##regl_name##_ILIM_MASK, \
- },\
- .conf = PV88090_REG_##regl_name##_CONF1, \
- .conf2 = PV88090_REG_##regl_name##_CONF2, \
- }
- #define PV88090_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 = &pv88090_ldo_ops,\
- .min_uV = min, \
- .uV_step = step, \
- .n_voltages = ((max) - (min))/(step) + 1, \
- .enable_reg = PV88090_REG_##regl_name##_CONT, \
- .enable_mask = PV88090_##regl_name##_EN, \
- .vsel_reg = PV88090_REG_##regl_name##_CONT, \
- .vsel_mask = PV88090_V##regl_name##_MASK, \
- },\
- }
- static struct pv88090_regulator pv88090_regulator_info[] = {
- PV88090_BUCK(PV88090, BUCK1, 600000, 6250, 1393750,
- pv88090_buck1_limits),
- PV88090_BUCK(PV88090, BUCK2, 600000, 6250, 1393750,
- pv88090_buck23_limits),
- PV88090_BUCK(PV88090, BUCK3, 600000, 6250, 1393750,
- pv88090_buck23_limits),
- PV88090_LDO(PV88090, LDO1, 1200000, 50000, 4350000),
- PV88090_LDO(PV88090, LDO2, 650000, 25000, 2225000),
- };
- static irqreturn_t pv88090_irq_handler(int irq, void *data)
- {
- struct pv88090 *chip = data;
- int i, reg_val, err, ret = IRQ_NONE;
- err = regmap_read(chip->regmap, PV88090_REG_EVENT_A, ®_val);
- if (err < 0)
- goto error_i2c;
- if (reg_val & PV88090_E_VDD_FLT) {
- for (i = 0; i < PV88090_MAX_REGULATORS; i++) {
- if (chip->rdev[i] != NULL) {
- regulator_lock(chip->rdev[i]);
- regulator_notifier_call_chain(chip->rdev[i],
- REGULATOR_EVENT_UNDER_VOLTAGE,
- NULL);
- regulator_unlock(chip->rdev[i]);
- }
- }
- err = regmap_write(chip->regmap, PV88090_REG_EVENT_A,
- PV88090_E_VDD_FLT);
- if (err < 0)
- goto error_i2c;
- ret = IRQ_HANDLED;
- }
- if (reg_val & PV88090_E_OVER_TEMP) {
- for (i = 0; i < PV88090_MAX_REGULATORS; i++) {
- if (chip->rdev[i] != NULL) {
- regulator_lock(chip->rdev[i]);
- regulator_notifier_call_chain(chip->rdev[i],
- REGULATOR_EVENT_OVER_TEMP,
- NULL);
- regulator_unlock(chip->rdev[i]);
- }
- }
- err = regmap_write(chip->regmap, PV88090_REG_EVENT_A,
- PV88090_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 pv88090_i2c_probe(struct i2c_client *i2c,
- const struct i2c_device_id *id)
- {
- struct regulator_init_data *init_data = dev_get_platdata(&i2c->dev);
- struct pv88090 *chip;
- struct regulator_config config = { };
- int error, i, ret = 0;
- unsigned int conf2, range, index;
- chip = devm_kzalloc(&i2c->dev, sizeof(struct pv88090), GFP_KERNEL);
- if (!chip)
- return -ENOMEM;
- chip->dev = &i2c->dev;
- chip->regmap = devm_regmap_init_i2c(i2c, &pv88090_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, PV88090_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, PV88090_REG_MASK_B, 0xFF);
- if (ret < 0) {
- dev_err(chip->dev,
- "Failed to mask B reg: %d\n", ret);
- return ret;
- }
- ret = devm_request_threaded_irq(&i2c->dev, i2c->irq, NULL,
- pv88090_irq_handler,
- IRQF_TRIGGER_LOW|IRQF_ONESHOT,
- "pv88090", chip);
- if (ret != 0) {
- dev_err(chip->dev, "Failed to request IRQ: %d\n",
- i2c->irq);
- return ret;
- }
- ret = regmap_update_bits(chip->regmap, PV88090_REG_MASK_A,
- PV88090_M_VDD_FLT | PV88090_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 < PV88090_MAX_REGULATORS; i++) {
- if (init_data)
- config.init_data = &init_data[i];
- if (i == PV88090_ID_BUCK2 || i == PV88090_ID_BUCK3) {
- ret = regmap_read(chip->regmap,
- pv88090_regulator_info[i].conf2, &conf2);
- if (ret < 0)
- return ret;
- conf2 = (conf2 >> PV88090_BUCK_VDAC_RANGE_SHIFT) &
- PV88090_BUCK_VDAC_RANGE_MASK;
- ret = regmap_read(chip->regmap,
- PV88090_REG_BUCK_FOLD_RANGE, &range);
- if (ret < 0)
- return ret;
- range = (range >>
- (PV88090_BUCK_VRANGE_GAIN_SHIFT + i - 1)) &
- PV88090_BUCK_VRANGE_GAIN_MASK;
- index = ((range << 1) | conf2);
- if (index > PV88090_ID_BUCK3) {
- dev_err(chip->dev,
- "Invalid index(%d)\n", index);
- return -EINVAL;
- }
- pv88090_regulator_info[i].desc.min_uV
- = pv88090_buck_vol[index].min_uV;
- pv88090_regulator_info[i].desc.uV_step
- = pv88090_buck_vol[index].uV_step;
- pv88090_regulator_info[i].desc.n_voltages
- = ((pv88090_buck_vol[index].max_uV)
- - (pv88090_buck_vol[index].min_uV))
- /(pv88090_buck_vol[index].uV_step) + 1;
- }
- config.driver_data = (void *)&pv88090_regulator_info[i];
- chip->rdev[i] = devm_regulator_register(chip->dev,
- &pv88090_regulator_info[i].desc, &config);
- if (IS_ERR(chip->rdev[i])) {
- dev_err(chip->dev,
- "Failed to register PV88090 regulator\n");
- return PTR_ERR(chip->rdev[i]);
- }
- }
- return 0;
- }
- static const struct i2c_device_id pv88090_i2c_id[] = {
- {"pv88090", 0},
- {},
- };
- MODULE_DEVICE_TABLE(i2c, pv88090_i2c_id);
- #ifdef CONFIG_OF
- static const struct of_device_id pv88090_dt_ids[] = {
- { .compatible = "pvs,pv88090", .data = &pv88090_i2c_id[0] },
- {},
- };
- MODULE_DEVICE_TABLE(of, pv88090_dt_ids);
- #endif
- static struct i2c_driver pv88090_regulator_driver = {
- .driver = {
- .name = "pv88090",
- .of_match_table = of_match_ptr(pv88090_dt_ids),
- },
- .probe = pv88090_i2c_probe,
- .id_table = pv88090_i2c_id,
- };
- module_i2c_driver(pv88090_regulator_driver);
- MODULE_AUTHOR("James Ban <James.Ban.opensource@diasemi.com>");
- MODULE_DESCRIPTION("Regulator device driver for Powerventure PV88090");
- MODULE_LICENSE("GPL");
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