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1// SPDX-License-Identifier: GPL-2.0+2//3// pv88090-regulator.c - Regulator device driver for PV880904// Copyright (C) 2015 Powerventure Semiconductor Ltd.5 6#include <linux/err.h>7#include <linux/i2c.h>8#include <linux/module.h>9#include <linux/init.h>10#include <linux/slab.h>11#include <linux/regulator/driver.h>12#include <linux/regulator/machine.h>13#include <linux/regmap.h>14#include <linux/irq.h>15#include <linux/interrupt.h>16#include <linux/regulator/of_regulator.h>17#include "pv88090-regulator.h"18 19#define PV88090_MAX_REGULATORS 520 21/* PV88090 REGULATOR IDs */22enum {23 /* BUCKs */24 PV88090_ID_BUCK1,25 PV88090_ID_BUCK2,26 PV88090_ID_BUCK3,27 28 /* LDOs */29 PV88090_ID_LDO1,30 PV88090_ID_LDO2,31};32 33struct pv88090_regulator {34 struct regulator_desc desc;35 unsigned int conf;36 unsigned int conf2;37};38 39struct pv88090 {40 struct device *dev;41 struct regmap *regmap;42 struct regulator_dev *rdev[PV88090_MAX_REGULATORS];43};44 45struct pv88090_buck_voltage {46 int min_uV;47 int max_uV;48 int uV_step;49};50 51static const struct regmap_config pv88090_regmap_config = {52 .reg_bits = 8,53 .val_bits = 8,54};55 56/* Current limits array (in uA) for BUCK1, BUCK2, BUCK3.57 * Entry indexes corresponds to register values.58 */59 60static const unsigned int pv88090_buck1_limits[] = {61 220000, 440000, 660000, 880000, 1100000, 1320000, 1540000, 1760000,62 1980000, 2200000, 2420000, 2640000, 2860000, 3080000, 3300000, 3520000,63 3740000, 3960000, 4180000, 4400000, 4620000, 4840000, 5060000, 5280000,64 5500000, 5720000, 5940000, 6160000, 6380000, 6600000, 6820000, 704000065};66 67static const unsigned int pv88090_buck23_limits[] = {68 1496000, 2393000, 3291000, 418900069};70 71static const struct pv88090_buck_voltage pv88090_buck_vol[3] = {72 {73 .min_uV = 600000,74 .max_uV = 1393750,75 .uV_step = 6250,76 },77 78 {79 .min_uV = 1400000,80 .max_uV = 2193750,81 .uV_step = 6250,82 },83 {84 .min_uV = 1250000,85 .max_uV = 2837500,86 .uV_step = 12500,87 },88};89 90static unsigned int pv88090_buck_get_mode(struct regulator_dev *rdev)91{92 struct pv88090_regulator *info = rdev_get_drvdata(rdev);93 unsigned int data;94 int ret, mode = 0;95 96 ret = regmap_read(rdev->regmap, info->conf, &data);97 if (ret < 0)98 return ret;99 100 switch (data & PV88090_BUCK1_MODE_MASK) {101 case PV88090_BUCK_MODE_SYNC:102 mode = REGULATOR_MODE_FAST;103 break;104 case PV88090_BUCK_MODE_AUTO:105 mode = REGULATOR_MODE_NORMAL;106 break;107 case PV88090_BUCK_MODE_SLEEP:108 mode = REGULATOR_MODE_STANDBY;109 break;110 }111 112 return mode;113}114 115static int pv88090_buck_set_mode(struct regulator_dev *rdev,116 unsigned int mode)117{118 struct pv88090_regulator *info = rdev_get_drvdata(rdev);119 int val = 0;120 121 switch (mode) {122 case REGULATOR_MODE_FAST:123 val = PV88090_BUCK_MODE_SYNC;124 break;125 case REGULATOR_MODE_NORMAL:126 val = PV88090_BUCK_MODE_AUTO;127 break;128 case REGULATOR_MODE_STANDBY:129 val = PV88090_BUCK_MODE_SLEEP;130 break;131 default:132 return -EINVAL;133 }134 135 return regmap_update_bits(rdev->regmap, info->conf,136 PV88090_BUCK1_MODE_MASK, val);137}138 139static const struct regulator_ops pv88090_buck_ops = {140 .get_mode = pv88090_buck_get_mode,141 .set_mode = pv88090_buck_set_mode,142 .enable = regulator_enable_regmap,143 .disable = regulator_disable_regmap,144 .is_enabled = regulator_is_enabled_regmap,145 .set_voltage_sel = regulator_set_voltage_sel_regmap,146 .get_voltage_sel = regulator_get_voltage_sel_regmap,147 .list_voltage = regulator_list_voltage_linear,148 .set_current_limit = regulator_set_current_limit_regmap,149 .get_current_limit = regulator_get_current_limit_regmap,150};151 152static const struct regulator_ops pv88090_ldo_ops = {153 .enable = regulator_enable_regmap,154 .disable = regulator_disable_regmap,155 .is_enabled = regulator_is_enabled_regmap,156 .set_voltage_sel = regulator_set_voltage_sel_regmap,157 .get_voltage_sel = regulator_get_voltage_sel_regmap,158 .list_voltage = regulator_list_voltage_linear,159};160 161#define PV88090_BUCK(chip, regl_name, min, step, max, limits_array) \162{\163 .desc = {\164 .id = chip##_ID_##regl_name,\165 .name = __stringify(chip##_##regl_name),\166 .of_match = of_match_ptr(#regl_name),\167 .regulators_node = of_match_ptr("regulators"),\168 .type = REGULATOR_VOLTAGE,\169 .owner = THIS_MODULE,\170 .ops = &pv88090_buck_ops,\171 .min_uV = min, \172 .uV_step = step, \173 .n_voltages = ((max) - (min))/(step) + 1, \174 .enable_reg = PV88090_REG_##regl_name##_CONF0, \175 .enable_mask = PV88090_##regl_name##_EN, \176 .vsel_reg = PV88090_REG_##regl_name##_CONF0, \177 .vsel_mask = PV88090_V##regl_name##_MASK, \178 .curr_table = limits_array, \179 .n_current_limits = ARRAY_SIZE(limits_array), \180 .csel_reg = PV88090_REG_##regl_name##_CONF1, \181 .csel_mask = PV88090_##regl_name##_ILIM_MASK, \182 },\183 .conf = PV88090_REG_##regl_name##_CONF1, \184 .conf2 = PV88090_REG_##regl_name##_CONF2, \185}186 187#define PV88090_LDO(chip, regl_name, min, step, max) \188{\189 .desc = {\190 .id = chip##_ID_##regl_name,\191 .name = __stringify(chip##_##regl_name),\192 .of_match = of_match_ptr(#regl_name),\193 .regulators_node = of_match_ptr("regulators"),\194 .type = REGULATOR_VOLTAGE,\195 .owner = THIS_MODULE,\196 .ops = &pv88090_ldo_ops,\197 .min_uV = min, \198 .uV_step = step, \199 .n_voltages = ((max) - (min))/(step) + 1, \200 .enable_reg = PV88090_REG_##regl_name##_CONT, \201 .enable_mask = PV88090_##regl_name##_EN, \202 .vsel_reg = PV88090_REG_##regl_name##_CONT, \203 .vsel_mask = PV88090_V##regl_name##_MASK, \204 },\205}206 207static struct pv88090_regulator pv88090_regulator_info[] = {208 PV88090_BUCK(PV88090, BUCK1, 600000, 6250, 1393750,209 pv88090_buck1_limits),210 PV88090_BUCK(PV88090, BUCK2, 600000, 6250, 1393750,211 pv88090_buck23_limits),212 PV88090_BUCK(PV88090, BUCK3, 600000, 6250, 1393750,213 pv88090_buck23_limits),214 PV88090_LDO(PV88090, LDO1, 1200000, 50000, 4350000),215 PV88090_LDO(PV88090, LDO2, 650000, 25000, 2225000),216};217 218static irqreturn_t pv88090_irq_handler(int irq, void *data)219{220 struct pv88090 *chip = data;221 int i, reg_val, err, ret = IRQ_NONE;222 223 err = regmap_read(chip->regmap, PV88090_REG_EVENT_A, ®_val);224 if (err < 0)225 goto error_i2c;226 227 if (reg_val & PV88090_E_VDD_FLT) {228 for (i = 0; i < PV88090_MAX_REGULATORS; i++) {229 if (chip->rdev[i] != NULL)230 regulator_notifier_call_chain(chip->rdev[i],231 REGULATOR_EVENT_UNDER_VOLTAGE,232 NULL);233 }234 235 err = regmap_write(chip->regmap, PV88090_REG_EVENT_A,236 PV88090_E_VDD_FLT);237 if (err < 0)238 goto error_i2c;239 240 ret = IRQ_HANDLED;241 }242 243 if (reg_val & PV88090_E_OVER_TEMP) {244 for (i = 0; i < PV88090_MAX_REGULATORS; i++) {245 if (chip->rdev[i] != NULL)246 regulator_notifier_call_chain(chip->rdev[i],247 REGULATOR_EVENT_OVER_TEMP,248 NULL);249 }250 251 err = regmap_write(chip->regmap, PV88090_REG_EVENT_A,252 PV88090_E_OVER_TEMP);253 if (err < 0)254 goto error_i2c;255 256 ret = IRQ_HANDLED;257 }258 259 return ret;260 261error_i2c:262 dev_err(chip->dev, "I2C error : %d\n", err);263 return IRQ_NONE;264}265 266/*267 * I2C driver interface functions268 */269static int pv88090_i2c_probe(struct i2c_client *i2c)270{271 struct regulator_init_data *init_data = dev_get_platdata(&i2c->dev);272 struct pv88090 *chip;273 struct regulator_config config = { };274 int error, i, ret = 0;275 unsigned int conf2, range, index;276 277 chip = devm_kzalloc(&i2c->dev, sizeof(struct pv88090), GFP_KERNEL);278 if (!chip)279 return -ENOMEM;280 281 chip->dev = &i2c->dev;282 chip->regmap = devm_regmap_init_i2c(i2c, &pv88090_regmap_config);283 if (IS_ERR(chip->regmap)) {284 error = PTR_ERR(chip->regmap);285 dev_err(chip->dev, "Failed to allocate register map: %d\n",286 error);287 return error;288 }289 290 i2c_set_clientdata(i2c, chip);291 292 if (i2c->irq != 0) {293 ret = regmap_write(chip->regmap, PV88090_REG_MASK_A, 0xFF);294 if (ret < 0) {295 dev_err(chip->dev,296 "Failed to mask A reg: %d\n", ret);297 return ret;298 }299 300 ret = regmap_write(chip->regmap, PV88090_REG_MASK_B, 0xFF);301 if (ret < 0) {302 dev_err(chip->dev,303 "Failed to mask B reg: %d\n", ret);304 return ret;305 }306 307 ret = devm_request_threaded_irq(&i2c->dev, i2c->irq, NULL,308 pv88090_irq_handler,309 IRQF_TRIGGER_LOW|IRQF_ONESHOT,310 "pv88090", chip);311 if (ret != 0) {312 dev_err(chip->dev, "Failed to request IRQ: %d\n",313 i2c->irq);314 return ret;315 }316 317 ret = regmap_update_bits(chip->regmap, PV88090_REG_MASK_A,318 PV88090_M_VDD_FLT | PV88090_M_OVER_TEMP, 0);319 if (ret < 0) {320 dev_err(chip->dev,321 "Failed to update mask reg: %d\n", ret);322 return ret;323 }324 325 } else {326 dev_warn(chip->dev, "No IRQ configured\n");327 }328 329 config.dev = chip->dev;330 config.regmap = chip->regmap;331 332 for (i = 0; i < PV88090_MAX_REGULATORS; i++) {333 if (init_data)334 config.init_data = &init_data[i];335 336 if (i == PV88090_ID_BUCK2 || i == PV88090_ID_BUCK3) {337 ret = regmap_read(chip->regmap,338 pv88090_regulator_info[i].conf2, &conf2);339 if (ret < 0)340 return ret;341 342 conf2 = (conf2 >> PV88090_BUCK_VDAC_RANGE_SHIFT) &343 PV88090_BUCK_VDAC_RANGE_MASK;344 345 ret = regmap_read(chip->regmap,346 PV88090_REG_BUCK_FOLD_RANGE, &range);347 if (ret < 0)348 return ret;349 350 range = (range >>351 (PV88090_BUCK_VRANGE_GAIN_SHIFT + i - 1)) &352 PV88090_BUCK_VRANGE_GAIN_MASK;353 index = ((range << 1) | conf2);354 if (index > PV88090_ID_BUCK3) {355 dev_err(chip->dev,356 "Invalid index(%d)\n", index);357 return -EINVAL;358 }359 360 pv88090_regulator_info[i].desc.min_uV361 = pv88090_buck_vol[index].min_uV;362 pv88090_regulator_info[i].desc.uV_step363 = pv88090_buck_vol[index].uV_step;364 pv88090_regulator_info[i].desc.n_voltages365 = ((pv88090_buck_vol[index].max_uV)366 - (pv88090_buck_vol[index].min_uV))367 /(pv88090_buck_vol[index].uV_step) + 1;368 }369 370 config.driver_data = (void *)&pv88090_regulator_info[i];371 chip->rdev[i] = devm_regulator_register(chip->dev,372 &pv88090_regulator_info[i].desc, &config);373 if (IS_ERR(chip->rdev[i])) {374 dev_err(chip->dev,375 "Failed to register PV88090 regulator\n");376 return PTR_ERR(chip->rdev[i]);377 }378 }379 380 return 0;381}382 383static const struct i2c_device_id pv88090_i2c_id[] = {384 { "pv88090" },385 {}386};387MODULE_DEVICE_TABLE(i2c, pv88090_i2c_id);388 389#ifdef CONFIG_OF390static const struct of_device_id pv88090_dt_ids[] = {391 { .compatible = "pvs,pv88090", .data = &pv88090_i2c_id[0] },392 {},393};394MODULE_DEVICE_TABLE(of, pv88090_dt_ids);395#endif396 397static struct i2c_driver pv88090_regulator_driver = {398 .driver = {399 .name = "pv88090",400 .probe_type = PROBE_PREFER_ASYNCHRONOUS,401 .of_match_table = of_match_ptr(pv88090_dt_ids),402 },403 .probe = pv88090_i2c_probe,404 .id_table = pv88090_i2c_id,405};406 407module_i2c_driver(pv88090_regulator_driver);408 409MODULE_AUTHOR("James Ban <James.Ban.opensource@diasemi.com>");410MODULE_DESCRIPTION("Regulator device driver for Powerventure PV88090");411MODULE_LICENSE("GPL");412