391 lines · c
1// SPDX-License-Identifier: GPL-2.0+2//3// pv88060-regulator.c - Regulator device driver for PV880604// 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 "pv88060-regulator.h"18 19#define PV88060_MAX_REGULATORS 1420 21/* PV88060 REGULATOR IDs */22enum {23 /* BUCKs */24 PV88060_ID_BUCK1,25 26 /* LDOs */27 PV88060_ID_LDO1,28 PV88060_ID_LDO2,29 PV88060_ID_LDO3,30 PV88060_ID_LDO4,31 PV88060_ID_LDO5,32 PV88060_ID_LDO6,33 PV88060_ID_LDO7,34 35 /* SWTs */36 PV88060_ID_SW1,37 PV88060_ID_SW2,38 PV88060_ID_SW3,39 PV88060_ID_SW4,40 PV88060_ID_SW5,41 PV88060_ID_SW6,42};43 44struct pv88060_regulator {45 struct regulator_desc desc;46 unsigned int conf; /* buck configuration register */47};48 49struct pv88060 {50 struct device *dev;51 struct regmap *regmap;52 struct regulator_dev *rdev[PV88060_MAX_REGULATORS];53};54 55static const struct regmap_config pv88060_regmap_config = {56 .reg_bits = 8,57 .val_bits = 8,58};59 60/* Current limits array (in uA) for BUCK161 * Entry indexes corresponds to register values.62 */63 64static const unsigned int pv88060_buck1_limits[] = {65 1496000, 2393000, 3291000, 418900066};67 68static unsigned int pv88060_buck_get_mode(struct regulator_dev *rdev)69{70 struct pv88060_regulator *info = rdev_get_drvdata(rdev);71 unsigned int data;72 int ret, mode = 0;73 74 ret = regmap_read(rdev->regmap, info->conf, &data);75 if (ret < 0)76 return ret;77 78 switch (data & PV88060_BUCK_MODE_MASK) {79 case PV88060_BUCK_MODE_SYNC:80 mode = REGULATOR_MODE_FAST;81 break;82 case PV88060_BUCK_MODE_AUTO:83 mode = REGULATOR_MODE_NORMAL;84 break;85 case PV88060_BUCK_MODE_SLEEP:86 mode = REGULATOR_MODE_STANDBY;87 break;88 }89 90 return mode;91}92 93static int pv88060_buck_set_mode(struct regulator_dev *rdev,94 unsigned int mode)95{96 struct pv88060_regulator *info = rdev_get_drvdata(rdev);97 int val = 0;98 99 switch (mode) {100 case REGULATOR_MODE_FAST:101 val = PV88060_BUCK_MODE_SYNC;102 break;103 case REGULATOR_MODE_NORMAL:104 val = PV88060_BUCK_MODE_AUTO;105 break;106 case REGULATOR_MODE_STANDBY:107 val = PV88060_BUCK_MODE_SLEEP;108 break;109 default:110 return -EINVAL;111 }112 113 return regmap_update_bits(rdev->regmap, info->conf,114 PV88060_BUCK_MODE_MASK, val);115}116 117static const struct regulator_ops pv88060_buck_ops = {118 .get_mode = pv88060_buck_get_mode,119 .set_mode = pv88060_buck_set_mode,120 .enable = regulator_enable_regmap,121 .disable = regulator_disable_regmap,122 .is_enabled = regulator_is_enabled_regmap,123 .set_voltage_sel = regulator_set_voltage_sel_regmap,124 .get_voltage_sel = regulator_get_voltage_sel_regmap,125 .list_voltage = regulator_list_voltage_linear,126 .set_current_limit = regulator_set_current_limit_regmap,127 .get_current_limit = regulator_get_current_limit_regmap,128};129 130static const struct regulator_ops pv88060_ldo_ops = {131 .enable = regulator_enable_regmap,132 .disable = regulator_disable_regmap,133 .is_enabled = regulator_is_enabled_regmap,134 .set_voltage_sel = regulator_set_voltage_sel_regmap,135 .get_voltage_sel = regulator_get_voltage_sel_regmap,136 .list_voltage = regulator_list_voltage_linear,137};138 139static const struct regulator_ops pv88060_sw_ops = {140 .enable = regulator_enable_regmap,141 .disable = regulator_disable_regmap,142 .is_enabled = regulator_is_enabled_regmap,143};144 145#define PV88060_BUCK(chip, regl_name, min, step, max, limits_array) \146{\147 .desc = {\148 .id = chip##_ID_##regl_name,\149 .name = __stringify(chip##_##regl_name),\150 .of_match = of_match_ptr(#regl_name),\151 .regulators_node = of_match_ptr("regulators"),\152 .type = REGULATOR_VOLTAGE,\153 .owner = THIS_MODULE,\154 .ops = &pv88060_buck_ops,\155 .min_uV = min,\156 .uV_step = step,\157 .n_voltages = ((max) - (min))/(step) + 1,\158 .enable_reg = PV88060_REG_##regl_name##_CONF0,\159 .enable_mask = PV88060_BUCK_EN, \160 .vsel_reg = PV88060_REG_##regl_name##_CONF0,\161 .vsel_mask = PV88060_VBUCK_MASK,\162 .curr_table = limits_array,\163 .n_current_limits = ARRAY_SIZE(limits_array),\164 .csel_reg = PV88060_REG_##regl_name##_CONF1,\165 .csel_mask = PV88060_BUCK_ILIM_MASK,\166 },\167 .conf = PV88060_REG_##regl_name##_CONF1,\168}169 170#define PV88060_LDO(chip, regl_name, min, step, max) \171{\172 .desc = {\173 .id = chip##_ID_##regl_name,\174 .name = __stringify(chip##_##regl_name),\175 .of_match = of_match_ptr(#regl_name),\176 .regulators_node = of_match_ptr("regulators"),\177 .type = REGULATOR_VOLTAGE,\178 .owner = THIS_MODULE,\179 .ops = &pv88060_ldo_ops,\180 .min_uV = min, \181 .uV_step = step, \182 .n_voltages = (step) ? ((max - min) / step + 1) : 1, \183 .enable_reg = PV88060_REG_##regl_name##_CONF, \184 .enable_mask = PV88060_LDO_EN, \185 .vsel_reg = PV88060_REG_##regl_name##_CONF, \186 .vsel_mask = PV88060_VLDO_MASK, \187 },\188}189 190#define PV88060_SW(chip, regl_name, max) \191{\192 .desc = {\193 .id = chip##_ID_##regl_name,\194 .name = __stringify(chip##_##regl_name),\195 .of_match = of_match_ptr(#regl_name),\196 .regulators_node = of_match_ptr("regulators"),\197 .type = REGULATOR_VOLTAGE,\198 .owner = THIS_MODULE,\199 .ops = &pv88060_sw_ops,\200 .fixed_uV = max,\201 .n_voltages = 1,\202 .enable_reg = PV88060_REG_##regl_name##_CONF,\203 .enable_mask = PV88060_SW_EN,\204 },\205}206 207static const struct pv88060_regulator pv88060_regulator_info[] = {208 PV88060_BUCK(PV88060, BUCK1, 2800000, 12500, 4387500,209 pv88060_buck1_limits),210 PV88060_LDO(PV88060, LDO1, 1200000, 50000, 3350000),211 PV88060_LDO(PV88060, LDO2, 1200000, 50000, 3350000),212 PV88060_LDO(PV88060, LDO3, 1200000, 50000, 3350000),213 PV88060_LDO(PV88060, LDO4, 1200000, 50000, 3350000),214 PV88060_LDO(PV88060, LDO5, 1200000, 50000, 3350000),215 PV88060_LDO(PV88060, LDO6, 1200000, 50000, 3350000),216 PV88060_LDO(PV88060, LDO7, 1200000, 50000, 3350000),217 PV88060_SW(PV88060, SW1, 5000000),218 PV88060_SW(PV88060, SW2, 5000000),219 PV88060_SW(PV88060, SW3, 5000000),220 PV88060_SW(PV88060, SW4, 5000000),221 PV88060_SW(PV88060, SW5, 5000000),222 PV88060_SW(PV88060, SW6, 5000000),223};224 225static irqreturn_t pv88060_irq_handler(int irq, void *data)226{227 struct pv88060 *chip = data;228 int i, reg_val, err, ret = IRQ_NONE;229 230 err = regmap_read(chip->regmap, PV88060_REG_EVENT_A, ®_val);231 if (err < 0)232 goto error_i2c;233 234 if (reg_val & PV88060_E_VDD_FLT) {235 for (i = 0; i < PV88060_MAX_REGULATORS; i++) {236 if (chip->rdev[i] != NULL)237 regulator_notifier_call_chain(chip->rdev[i],238 REGULATOR_EVENT_UNDER_VOLTAGE,239 NULL);240 }241 242 err = regmap_write(chip->regmap, PV88060_REG_EVENT_A,243 PV88060_E_VDD_FLT);244 if (err < 0)245 goto error_i2c;246 247 ret = IRQ_HANDLED;248 }249 250 if (reg_val & PV88060_E_OVER_TEMP) {251 for (i = 0; i < PV88060_MAX_REGULATORS; i++) {252 if (chip->rdev[i] != NULL)253 regulator_notifier_call_chain(chip->rdev[i],254 REGULATOR_EVENT_OVER_TEMP,255 NULL);256 }257 258 err = regmap_write(chip->regmap, PV88060_REG_EVENT_A,259 PV88060_E_OVER_TEMP);260 if (err < 0)261 goto error_i2c;262 263 ret = IRQ_HANDLED;264 }265 266 return ret;267 268error_i2c:269 dev_err(chip->dev, "I2C error : %d\n", err);270 return IRQ_NONE;271}272 273/*274 * I2C driver interface functions275 */276static int pv88060_i2c_probe(struct i2c_client *i2c)277{278 struct regulator_init_data *init_data = dev_get_platdata(&i2c->dev);279 struct pv88060 *chip;280 struct regulator_config config = { };281 int error, i, ret = 0;282 283 chip = devm_kzalloc(&i2c->dev, sizeof(struct pv88060), GFP_KERNEL);284 if (!chip)285 return -ENOMEM;286 287 chip->dev = &i2c->dev;288 chip->regmap = devm_regmap_init_i2c(i2c, &pv88060_regmap_config);289 if (IS_ERR(chip->regmap)) {290 error = PTR_ERR(chip->regmap);291 dev_err(chip->dev, "Failed to allocate register map: %d\n",292 error);293 return error;294 }295 296 i2c_set_clientdata(i2c, chip);297 298 if (i2c->irq != 0) {299 ret = regmap_write(chip->regmap, PV88060_REG_MASK_A, 0xFF);300 if (ret < 0) {301 dev_err(chip->dev,302 "Failed to mask A reg: %d\n", ret);303 return ret;304 }305 306 ret = regmap_write(chip->regmap, PV88060_REG_MASK_B, 0xFF);307 if (ret < 0) {308 dev_err(chip->dev,309 "Failed to mask B reg: %d\n", ret);310 return ret;311 }312 313 ret = regmap_write(chip->regmap, PV88060_REG_MASK_C, 0xFF);314 if (ret < 0) {315 dev_err(chip->dev,316 "Failed to mask C reg: %d\n", ret);317 return ret;318 }319 320 ret = devm_request_threaded_irq(&i2c->dev, i2c->irq, NULL,321 pv88060_irq_handler,322 IRQF_TRIGGER_LOW|IRQF_ONESHOT,323 "pv88060", chip);324 if (ret != 0) {325 dev_err(chip->dev, "Failed to request IRQ: %d\n",326 i2c->irq);327 return ret;328 }329 330 ret = regmap_update_bits(chip->regmap, PV88060_REG_MASK_A,331 PV88060_M_VDD_FLT | PV88060_M_OVER_TEMP, 0);332 if (ret < 0) {333 dev_err(chip->dev,334 "Failed to update mask reg: %d\n", ret);335 return ret;336 }337 338 } else {339 dev_warn(chip->dev, "No IRQ configured\n");340 }341 342 config.dev = chip->dev;343 config.regmap = chip->regmap;344 345 for (i = 0; i < PV88060_MAX_REGULATORS; i++) {346 if (init_data)347 config.init_data = &init_data[i];348 349 config.driver_data = (void *)&pv88060_regulator_info[i];350 chip->rdev[i] = devm_regulator_register(chip->dev,351 &pv88060_regulator_info[i].desc, &config);352 if (IS_ERR(chip->rdev[i])) {353 dev_err(chip->dev,354 "Failed to register PV88060 regulator\n");355 return PTR_ERR(chip->rdev[i]);356 }357 }358 359 return 0;360}361 362static const struct i2c_device_id pv88060_i2c_id[] = {363 { "pv88060" },364 {}365};366MODULE_DEVICE_TABLE(i2c, pv88060_i2c_id);367 368#ifdef CONFIG_OF369static const struct of_device_id pv88060_dt_ids[] = {370 { .compatible = "pvs,pv88060", .data = &pv88060_i2c_id[0] },371 {},372};373MODULE_DEVICE_TABLE(of, pv88060_dt_ids);374#endif375 376static struct i2c_driver pv88060_regulator_driver = {377 .driver = {378 .name = "pv88060",379 .probe_type = PROBE_PREFER_ASYNCHRONOUS,380 .of_match_table = of_match_ptr(pv88060_dt_ids),381 },382 .probe = pv88060_i2c_probe,383 .id_table = pv88060_i2c_id,384};385 386module_i2c_driver(pv88060_regulator_driver);387 388MODULE_AUTHOR("James Ban <James.Ban.opensource@diasemi.com>");389MODULE_DESCRIPTION("Regulator device driver for Powerventure PV88060");390MODULE_LICENSE("GPL");391