1 // SPDX-License-Identifier: GPL-2.0 2 // 3 // tps65219-regulator.c 4 // 5 // Regulator driver for TPS65219 PMIC 6 // 7 // Copyright (C) 2022 BayLibre Incorporated - https://www.baylibre.com/ 8 // 9 // This implementation derived from tps65218 authored by 10 // "J Keerthy <j-keerthy@ti.com>" 11 // 12 13 #include <linux/kernel.h> 14 #include <linux/module.h> 15 #include <linux/device.h> 16 #include <linux/init.h> 17 #include <linux/err.h> 18 #include <linux/platform_device.h> 19 #include <linux/of_device.h> 20 #include <linux/regmap.h> 21 #include <linux/regulator/of_regulator.h> 22 #include <linux/regulator/driver.h> 23 #include <linux/regulator/machine.h> 24 #include <linux/mfd/tps65219.h> 25 26 struct tps65219_regulator_irq_type { 27 const char *irq_name; 28 const char *regulator_name; 29 const char *event_name; 30 unsigned long event; 31 }; 32 33 static struct tps65219_regulator_irq_type tps65219_regulator_irq_types[] = { 34 { "LDO3_SCG", "LDO3", "short circuit to ground", REGULATOR_EVENT_REGULATION_OUT }, 35 { "LDO3_OC", "LDO3", "overcurrent", REGULATOR_EVENT_OVER_CURRENT }, 36 { "LDO3_UV", "LDO3", "undervoltage", REGULATOR_EVENT_UNDER_VOLTAGE }, 37 { "LDO4_SCG", "LDO4", "short circuit to ground", REGULATOR_EVENT_REGULATION_OUT }, 38 { "LDO4_OC", "LDO4", "overcurrent", REGULATOR_EVENT_OVER_CURRENT }, 39 { "LDO4_UV", "LDO4", "undervoltage", REGULATOR_EVENT_UNDER_VOLTAGE }, 40 { "LDO1_SCG", "LDO1", "short circuit to ground", REGULATOR_EVENT_REGULATION_OUT }, 41 { "LDO1_OC", "LDO1", "overcurrent", REGULATOR_EVENT_OVER_CURRENT }, 42 { "LDO1_UV", "LDO1", "undervoltage", REGULATOR_EVENT_UNDER_VOLTAGE }, 43 { "LDO2_SCG", "LDO2", "short circuit to ground", REGULATOR_EVENT_REGULATION_OUT }, 44 { "LDO2_OC", "LDO2", "overcurrent", REGULATOR_EVENT_OVER_CURRENT }, 45 { "LDO2_UV", "LDO2", "undervoltage", REGULATOR_EVENT_UNDER_VOLTAGE }, 46 { "BUCK3_SCG", "BUCK3", "short circuit to ground", REGULATOR_EVENT_REGULATION_OUT }, 47 { "BUCK3_OC", "BUCK3", "overcurrent", REGULATOR_EVENT_OVER_CURRENT }, 48 { "BUCK3_NEG_OC", "BUCK3", "negative overcurrent", REGULATOR_EVENT_OVER_CURRENT }, 49 { "BUCK3_UV", "BUCK3", "undervoltage", REGULATOR_EVENT_UNDER_VOLTAGE }, 50 { "BUCK1_SCG", "BUCK1", "short circuit to ground", REGULATOR_EVENT_REGULATION_OUT }, 51 { "BUCK1_OC", "BUCK1", "overcurrent", REGULATOR_EVENT_OVER_CURRENT }, 52 { "BUCK1_NEG_OC", "BUCK1", "negative overcurrent", REGULATOR_EVENT_OVER_CURRENT }, 53 { "BUCK1_UV", "BUCK1", "undervoltage", REGULATOR_EVENT_UNDER_VOLTAGE }, 54 { "BUCK2_SCG", "BUCK2", "short circuit to ground", REGULATOR_EVENT_REGULATION_OUT }, 55 { "BUCK2_OC", "BUCK2", "overcurrent", REGULATOR_EVENT_OVER_CURRENT }, 56 { "BUCK2_NEG_OC", "BUCK2", "negative overcurrent", REGULATOR_EVENT_OVER_CURRENT }, 57 { "BUCK2_UV", "BUCK2", "undervoltage", REGULATOR_EVENT_UNDER_VOLTAGE }, 58 { "BUCK1_RV", "BUCK1", "residual voltage", REGULATOR_EVENT_OVER_VOLTAGE_WARN }, 59 { "BUCK2_RV", "BUCK2", "residual voltage", REGULATOR_EVENT_OVER_VOLTAGE_WARN }, 60 { "BUCK3_RV", "BUCK3", "residual voltage", REGULATOR_EVENT_OVER_VOLTAGE_WARN }, 61 { "LDO1_RV", "LDO1", "residual voltage", REGULATOR_EVENT_OVER_VOLTAGE_WARN }, 62 { "LDO2_RV", "LDO2", "residual voltage", REGULATOR_EVENT_OVER_VOLTAGE_WARN }, 63 { "LDO3_RV", "LDO3", "residual voltage", REGULATOR_EVENT_OVER_VOLTAGE_WARN }, 64 { "LDO4_RV", "LDO4", "residual voltage", REGULATOR_EVENT_OVER_VOLTAGE_WARN }, 65 { "BUCK1_RV_SD", "BUCK1", "residual voltage on shutdown", 66 REGULATOR_EVENT_OVER_VOLTAGE_WARN }, 67 { "BUCK2_RV_SD", "BUCK2", "residual voltage on shutdown", 68 REGULATOR_EVENT_OVER_VOLTAGE_WARN }, 69 { "BUCK3_RV_SD", "BUCK3", "residual voltage on shutdown", 70 REGULATOR_EVENT_OVER_VOLTAGE_WARN }, 71 { "LDO1_RV_SD", "LDO1", "residual voltage on shutdown", REGULATOR_EVENT_OVER_VOLTAGE_WARN }, 72 { "LDO2_RV_SD", "LDO2", "residual voltage on shutdown", REGULATOR_EVENT_OVER_VOLTAGE_WARN }, 73 { "LDO3_RV_SD", "LDO3", "residual voltage on shutdown", REGULATOR_EVENT_OVER_VOLTAGE_WARN }, 74 { "LDO4_RV_SD", "LDO4", "residual voltage on shutdown", REGULATOR_EVENT_OVER_VOLTAGE_WARN }, 75 { "SENSOR_3_WARM", "SENSOR3", "warm temperature", REGULATOR_EVENT_OVER_TEMP_WARN}, 76 { "SENSOR_2_WARM", "SENSOR2", "warm temperature", REGULATOR_EVENT_OVER_TEMP_WARN }, 77 { "SENSOR_1_WARM", "SENSOR1", "warm temperature", REGULATOR_EVENT_OVER_TEMP_WARN }, 78 { "SENSOR_0_WARM", "SENSOR0", "warm temperature", REGULATOR_EVENT_OVER_TEMP_WARN }, 79 { "SENSOR_3_HOT", "SENSOR3", "hot temperature", REGULATOR_EVENT_OVER_TEMP}, 80 { "SENSOR_2_HOT", "SENSOR2", "hot temperature", REGULATOR_EVENT_OVER_TEMP }, 81 { "SENSOR_1_HOT", "SENSOR1", "hot temperature", REGULATOR_EVENT_OVER_TEMP }, 82 { "SENSOR_0_HOT", "SENSOR0", "hot temperature", REGULATOR_EVENT_OVER_TEMP }, 83 { "TIMEOUT", "", "", REGULATOR_EVENT_ABORT_VOLTAGE_CHANGE }, 84 }; 85 86 struct tps65219_regulator_irq_data { 87 struct device *dev; 88 struct tps65219_regulator_irq_type *type; 89 struct regulator_dev *rdev; 90 }; 91 92 #define TPS65219_REGULATOR(_name, _of, _id, _type, _ops, _n, _vr, _vm, _er, \ 93 _em, _cr, _cm, _lr, _nlr, _delay, _fuv, \ 94 _ct, _ncl, _bpm) \ 95 { \ 96 .name = _name, \ 97 .of_match = _of, \ 98 .regulators_node = of_match_ptr("regulators"), \ 99 .supply_name = _of, \ 100 .id = _id, \ 101 .ops = &(_ops), \ 102 .n_voltages = _n, \ 103 .type = _type, \ 104 .owner = THIS_MODULE, \ 105 .vsel_reg = _vr, \ 106 .vsel_mask = _vm, \ 107 .csel_reg = _cr, \ 108 .csel_mask = _cm, \ 109 .curr_table = _ct, \ 110 .n_current_limits = _ncl, \ 111 .enable_reg = _er, \ 112 .enable_mask = _em, \ 113 .volt_table = NULL, \ 114 .linear_ranges = _lr, \ 115 .n_linear_ranges = _nlr, \ 116 .ramp_delay = _delay, \ 117 .fixed_uV = _fuv, \ 118 .bypass_reg = _vr, \ 119 .bypass_mask = _bpm, \ 120 } \ 121 122 static const struct linear_range bucks_ranges[] = { 123 REGULATOR_LINEAR_RANGE(600000, 0x0, 0x1f, 25000), 124 REGULATOR_LINEAR_RANGE(1400000, 0x20, 0x33, 100000), 125 REGULATOR_LINEAR_RANGE(3400000, 0x34, 0x3f, 0), 126 }; 127 128 static const struct linear_range ldos_1_2_ranges[] = { 129 REGULATOR_LINEAR_RANGE(600000, 0x0, 0x37, 50000), 130 REGULATOR_LINEAR_RANGE(3400000, 0x38, 0x3f, 0), 131 }; 132 133 static const struct linear_range ldos_3_4_ranges[] = { 134 REGULATOR_LINEAR_RANGE(1200000, 0x0, 0xC, 0), 135 REGULATOR_LINEAR_RANGE(1250000, 0xD, 0x35, 50000), 136 REGULATOR_LINEAR_RANGE(3300000, 0x36, 0x3F, 0), 137 }; 138 139 static int tps65219_set_mode(struct regulator_dev *dev, unsigned int mode) 140 { 141 struct tps65219 *tps = rdev_get_drvdata(dev); 142 143 switch (mode) { 144 case REGULATOR_MODE_NORMAL: 145 return regmap_set_bits(tps->regmap, TPS65219_REG_STBY_1_CONFIG, 146 dev->desc->enable_mask); 147 148 case REGULATOR_MODE_STANDBY: 149 return regmap_clear_bits(tps->regmap, 150 TPS65219_REG_STBY_1_CONFIG, 151 dev->desc->enable_mask); 152 default: 153 return -EINVAL; 154 } 155 } 156 157 static unsigned int tps65219_get_mode(struct regulator_dev *dev) 158 { 159 struct tps65219 *tps = rdev_get_drvdata(dev); 160 unsigned int rid = rdev_get_id(dev); 161 int ret, value = 0; 162 163 ret = regmap_read(tps->regmap, TPS65219_REG_STBY_1_CONFIG, &value); 164 if (ret) { 165 dev_dbg(tps->dev, "%s failed for regulator %s: %d ", 166 __func__, dev->desc->name, ret); 167 return ret; 168 } 169 value = (value & BIT(rid)) >> rid; 170 if (value) 171 return REGULATOR_MODE_STANDBY; 172 else 173 return REGULATOR_MODE_NORMAL; 174 } 175 176 /* 177 * generic regulator_set_bypass_regmap does not fully match requirements 178 * TPS65219 Requires explicitly that regulator is disabled before switch 179 */ 180 static int tps65219_set_bypass(struct regulator_dev *dev, bool enable) 181 { 182 struct tps65219 *tps = rdev_get_drvdata(dev); 183 unsigned int rid = rdev_get_id(dev); 184 185 if (dev->desc->ops->is_enabled(dev)) { 186 dev_err(tps->dev, 187 "%s LDO%d enabled, must be shut down to set bypass ", 188 __func__, rid); 189 return -EBUSY; 190 } 191 return regulator_set_bypass_regmap(dev, enable); 192 } 193 194 /* Operations permitted on BUCK1/2/3 */ 195 static const struct regulator_ops tps65219_bucks_ops = { 196 .is_enabled = regulator_is_enabled_regmap, 197 .enable = regulator_enable_regmap, 198 .disable = regulator_disable_regmap, 199 .set_mode = tps65219_set_mode, 200 .get_mode = tps65219_get_mode, 201 .get_voltage_sel = regulator_get_voltage_sel_regmap, 202 .set_voltage_sel = regulator_set_voltage_sel_regmap, 203 .list_voltage = regulator_list_voltage_linear_range, 204 .map_voltage = regulator_map_voltage_linear_range, 205 .set_voltage_time_sel = regulator_set_voltage_time_sel, 206 207 }; 208 209 /* Operations permitted on LDO1/2 */ 210 static const struct regulator_ops tps65219_ldos_1_2_ops = { 211 .is_enabled = regulator_is_enabled_regmap, 212 .enable = regulator_enable_regmap, 213 .disable = regulator_disable_regmap, 214 .set_mode = tps65219_set_mode, 215 .get_mode = tps65219_get_mode, 216 .get_voltage_sel = regulator_get_voltage_sel_regmap, 217 .set_voltage_sel = regulator_set_voltage_sel_regmap, 218 .list_voltage = regulator_list_voltage_linear_range, 219 .map_voltage = regulator_map_voltage_linear_range, 220 .set_bypass = tps65219_set_bypass, 221 .get_bypass = regulator_get_bypass_regmap, 222 }; 223 224 /* Operations permitted on LDO3/4 */ 225 static const struct regulator_ops tps65219_ldos_3_4_ops = { 226 .is_enabled = regulator_is_enabled_regmap, 227 .enable = regulator_enable_regmap, 228 .disable = regulator_disable_regmap, 229 .set_mode = tps65219_set_mode, 230 .get_mode = tps65219_get_mode, 231 .get_voltage_sel = regulator_get_voltage_sel_regmap, 232 .set_voltage_sel = regulator_set_voltage_sel_regmap, 233 .list_voltage = regulator_list_voltage_linear_range, 234 .map_voltage = regulator_map_voltage_linear_range, 235 }; 236 237 static const struct regulator_desc regulators[] = { 238 TPS65219_REGULATOR("BUCK1", "buck1", TPS65219_BUCK_1, 239 REGULATOR_VOLTAGE, tps65219_bucks_ops, 64, 240 TPS65219_REG_BUCK1_VOUT, 241 TPS65219_BUCKS_LDOS_VOUT_VSET_MASK, 242 TPS65219_REG_ENABLE_CTRL, 243 TPS65219_ENABLE_BUCK1_EN_MASK, 0, 0, bucks_ranges, 244 3, 4000, 0, NULL, 0, 0), 245 TPS65219_REGULATOR("BUCK2", "buck2", TPS65219_BUCK_2, 246 REGULATOR_VOLTAGE, tps65219_bucks_ops, 64, 247 TPS65219_REG_BUCK2_VOUT, 248 TPS65219_BUCKS_LDOS_VOUT_VSET_MASK, 249 TPS65219_REG_ENABLE_CTRL, 250 TPS65219_ENABLE_BUCK2_EN_MASK, 0, 0, bucks_ranges, 251 3, 4000, 0, NULL, 0, 0), 252 TPS65219_REGULATOR("BUCK3", "buck3", TPS65219_BUCK_3, 253 REGULATOR_VOLTAGE, tps65219_bucks_ops, 64, 254 TPS65219_REG_BUCK3_VOUT, 255 TPS65219_BUCKS_LDOS_VOUT_VSET_MASK, 256 TPS65219_REG_ENABLE_CTRL, 257 TPS65219_ENABLE_BUCK3_EN_MASK, 0, 0, bucks_ranges, 258 3, 0, 0, NULL, 0, 0), 259 TPS65219_REGULATOR("LDO1", "ldo1", TPS65219_LDO_1, 260 REGULATOR_VOLTAGE, tps65219_ldos_1_2_ops, 64, 261 TPS65219_REG_LDO1_VOUT, 262 TPS65219_BUCKS_LDOS_VOUT_VSET_MASK, 263 TPS65219_REG_ENABLE_CTRL, 264 TPS65219_ENABLE_LDO1_EN_MASK, 0, 0, ldos_1_2_ranges, 265 2, 0, 0, NULL, 0, TPS65219_LDOS_BYP_CONFIG_MASK), 266 TPS65219_REGULATOR("LDO2", "ldo2", TPS65219_LDO_2, 267 REGULATOR_VOLTAGE, tps65219_ldos_1_2_ops, 64, 268 TPS65219_REG_LDO2_VOUT, 269 TPS65219_BUCKS_LDOS_VOUT_VSET_MASK, 270 TPS65219_REG_ENABLE_CTRL, 271 TPS65219_ENABLE_LDO2_EN_MASK, 0, 0, ldos_1_2_ranges, 272 2, 0, 0, NULL, 0, TPS65219_LDOS_BYP_CONFIG_MASK), 273 TPS65219_REGULATOR("LDO3", "ldo3", TPS65219_LDO_3, 274 REGULATOR_VOLTAGE, tps65219_ldos_3_4_ops, 64, 275 TPS65219_REG_LDO3_VOUT, 276 TPS65219_BUCKS_LDOS_VOUT_VSET_MASK, 277 TPS65219_REG_ENABLE_CTRL, 278 TPS65219_ENABLE_LDO3_EN_MASK, 0, 0, ldos_3_4_ranges, 279 3, 0, 0, NULL, 0, 0), 280 TPS65219_REGULATOR("LDO4", "ldo4", TPS65219_LDO_4, 281 REGULATOR_VOLTAGE, tps65219_ldos_3_4_ops, 64, 282 TPS65219_REG_LDO4_VOUT, 283 TPS65219_BUCKS_LDOS_VOUT_VSET_MASK, 284 TPS65219_REG_ENABLE_CTRL, 285 TPS65219_ENABLE_LDO4_EN_MASK, 0, 0, ldos_3_4_ranges, 286 3, 0, 0, NULL, 0, 0), 287 }; 288 289 static irqreturn_t tps65219_regulator_irq_handler(int irq, void *data) 290 { 291 struct tps65219_regulator_irq_data *irq_data = data; 292 293 if (irq_data->type->event_name[0] == '\0') { 294 /* This is the timeout interrupt no specific regulator */ 295 dev_err(irq_data->dev, 296 "System was put in shutdown due to timeout during an active or standby transition.\n"); 297 return IRQ_HANDLED; 298 } 299 300 regulator_notifier_call_chain(irq_data->rdev, 301 irq_data->type->event, NULL); 302 303 dev_err(irq_data->dev, "Error IRQ trap %s for %s\n", 304 irq_data->type->event_name, irq_data->type->regulator_name); 305 return IRQ_HANDLED; 306 } 307 308 static int tps65219_get_rdev_by_name(const char *regulator_name, 309 struct regulator_dev *rdevtbl[7], 310 struct regulator_dev *dev) 311 { 312 int i; 313 314 for (i = 0; i < ARRAY_SIZE(regulators); i++) { 315 if (strcmp(regulator_name, regulators[i].name) == 0) { 316 dev = rdevtbl[i]; 317 return 0; 318 } 319 } 320 return -EINVAL; 321 } 322 323 static int tps65219_regulator_probe(struct platform_device *pdev) 324 { 325 struct tps65219 *tps = dev_get_drvdata(pdev->dev.parent); 326 struct regulator_dev *rdev; 327 struct regulator_config config = { }; 328 int i; 329 int error; 330 int irq; 331 struct tps65219_regulator_irq_data *irq_data; 332 struct tps65219_regulator_irq_type *irq_type; 333 struct regulator_dev *rdevtbl[7]; 334 335 config.dev = tps->dev; 336 config.driver_data = tps; 337 config.regmap = tps->regmap; 338 339 for (i = 0; i < ARRAY_SIZE(regulators); i++) { 340 dev_dbg(tps->dev, "%s regul i= %d START", __func__, i); 341 rdev = devm_regulator_register(&pdev->dev, ®ulators[i], 342 &config); 343 if (IS_ERR(rdev)) { 344 dev_err(tps->dev, "failed to register %s regulator\n", 345 pdev->name); 346 return PTR_ERR(rdev); 347 } 348 rdevtbl[i] = rdev; 349 dev_dbg(tps->dev, "%s regul i= %d COMPLETED", __func__, i); 350 } 351 352 irq_data = devm_kmalloc(tps->dev, 353 ARRAY_SIZE(tps65219_regulator_irq_types) * 354 sizeof(struct tps65219_regulator_irq_data), 355 GFP_KERNEL); 356 if (!irq_data) 357 return -ENOMEM; 358 359 for (i = 0; i < ARRAY_SIZE(tps65219_regulator_irq_types); ++i) { 360 irq_type = &tps65219_regulator_irq_types[i]; 361 362 irq = platform_get_irq_byname(pdev, irq_type->irq_name); 363 if (irq < 0) 364 return -EINVAL; 365 366 irq_data[i].dev = tps->dev; 367 irq_data[i].type = irq_type; 368 369 tps65219_get_rdev_by_name(irq_type->regulator_name, rdevtbl, rdev); 370 if (rdev < 0) { 371 dev_err(tps->dev, "Failed to get rdev for %s\n", 372 irq_type->regulator_name); 373 return -EINVAL; 374 } 375 irq_data[i].rdev = rdev; 376 377 error = devm_request_threaded_irq(tps->dev, irq, NULL, 378 tps65219_regulator_irq_handler, 379 IRQF_ONESHOT, 380 irq_type->irq_name, 381 &irq_data[i]); 382 if (error) { 383 dev_err(tps->dev, "failed to request %s IRQ %d: %d\n", 384 irq_type->irq_name, irq, error); 385 return error; 386 } 387 } 388 389 return 0; 390 } 391 392 static const struct platform_device_id tps65219_regulator_id_table[] = { 393 { "tps65219-regulator", }, 394 { /* sentinel */ } 395 }; 396 MODULE_DEVICE_TABLE(platform, tps65219_regulator_id_table); 397 398 static struct platform_driver tps65219_regulator_driver = { 399 .driver = { 400 .name = "tps65219-pmic", 401 }, 402 .probe = tps65219_regulator_probe, 403 .id_table = tps65219_regulator_id_table, 404 }; 405 406 module_platform_driver(tps65219_regulator_driver); 407 408 MODULE_AUTHOR("Jerome Neanne <j-neanne@baylibre.com>"); 409 MODULE_DESCRIPTION("TPS65219 voltage regulator driver"); 410 MODULE_ALIAS("platform:tps65219-pmic"); 411 MODULE_LICENSE("GPL"); 412