1 // SPDX-License-Identifier: GPL-2.0-only 2 // 3 // DA9121 Single-channel dual-phase 10A buck converter 4 // 5 // Copyright (C) 2020 Axis Communications AB 6 // 7 // DA9130 Single-channel dual-phase 10A buck converter (Automotive) 8 // DA9217 Single-channel dual-phase 6A buck converter 9 // DA9122 Dual-channel single-phase 5A buck converter 10 // DA9131 Dual-channel single-phase 5A buck converter (Automotive) 11 // DA9220 Dual-channel single-phase 3A buck converter 12 // DA9132 Dual-channel single-phase 3A buck converter (Automotive) 13 // 14 // Copyright (C) 2020 Dialog Semiconductor 15 16 #include <linux/of_device.h> 17 #include <linux/of_gpio.h> 18 #include <linux/gpio/consumer.h> 19 #include <linux/regulator/of_regulator.h> 20 #include <linux/regulator/machine.h> 21 #include <linux/regulator/driver.h> 22 #include <linux/module.h> 23 #include <linux/regmap.h> 24 #include <linux/err.h> 25 #include <linux/i2c.h> 26 #include <linux/regulator/da9121.h> 27 #include <linux/interrupt.h> 28 #include <linux/workqueue.h> 29 30 #include "da9121-regulator.h" 31 32 /* Chip data */ 33 struct da9121 { 34 struct device *dev; 35 struct delayed_work work; 36 struct da9121_pdata *pdata; 37 struct regmap *regmap; 38 struct regulator_dev *rdev[DA9121_IDX_MAX]; 39 unsigned int persistent[2]; 40 unsigned int passive_delay; 41 int chip_irq; 42 int variant_id; 43 int subvariant_id; 44 }; 45 46 /* Define ranges for different variants, enabling translation to/from 47 * registers. Maximums give scope to allow for transients. 48 */ 49 struct da9121_range { 50 int val_min; 51 int val_max; 52 int val_stp; 53 int reg_min; 54 int reg_max; 55 }; 56 57 static struct da9121_range da9121_10A_2phase_current = { 58 .val_min = 7000000, 59 .val_max = 20000000, 60 .val_stp = 1000000, 61 .reg_min = 1, 62 .reg_max = 14, 63 }; 64 65 static struct da9121_range da9121_6A_2phase_current = { 66 .val_min = 7000000, 67 .val_max = 12000000, 68 .val_stp = 1000000, 69 .reg_min = 1, 70 .reg_max = 6, 71 }; 72 73 static struct da9121_range da9121_5A_1phase_current = { 74 .val_min = 3500000, 75 .val_max = 10000000, 76 .val_stp = 500000, 77 .reg_min = 1, 78 .reg_max = 14, 79 }; 80 81 static struct da9121_range da9121_3A_1phase_current = { 82 .val_min = 3500000, 83 .val_max = 6000000, 84 .val_stp = 500000, 85 .reg_min = 1, 86 .reg_max = 6, 87 }; 88 89 struct da9121_variant_info { 90 int num_bucks; 91 int num_phases; 92 struct da9121_range *current_range; 93 }; 94 95 static const struct da9121_variant_info variant_parameters[] = { 96 { 1, 2, &da9121_10A_2phase_current }, //DA9121_TYPE_DA9121_DA9130 97 { 2, 1, &da9121_3A_1phase_current }, //DA9121_TYPE_DA9220_DA9132 98 { 2, 1, &da9121_5A_1phase_current }, //DA9121_TYPE_DA9122_DA9131 99 { 1, 2, &da9121_6A_2phase_current }, //DA9121_TYPE_DA9217 100 }; 101 102 struct da9121_field { 103 unsigned int reg; 104 unsigned int msk; 105 }; 106 107 static const struct da9121_field da9121_current_field[2] = { 108 { DA9121_REG_BUCK_BUCK1_2, DA9121_MASK_BUCK_BUCKx_2_CHx_ILIM }, 109 { DA9xxx_REG_BUCK_BUCK2_2, DA9121_MASK_BUCK_BUCKx_2_CHx_ILIM }, 110 }; 111 112 static const struct da9121_field da9121_mode_field[2] = { 113 { DA9121_REG_BUCK_BUCK1_4, DA9121_MASK_BUCK_BUCKx_4_CHx_A_MODE }, 114 { DA9xxx_REG_BUCK_BUCK2_4, DA9121_MASK_BUCK_BUCKx_4_CHx_A_MODE }, 115 }; 116 117 struct status_event_data { 118 int buck_id; /* 0=core, 1/2-buck */ 119 int reg_index; /* index for status/event/mask register selection */ 120 int status_bit; /* bit masks... */ 121 int event_bit; 122 int mask_bit; 123 unsigned long notification; /* Notification for status inception */ 124 char *warn; /* if NULL, notify - otherwise dev_warn this string */ 125 }; 126 127 #define DA9121_STATUS(id, bank, name, notification, warning) \ 128 { id, bank, \ 129 DA9121_MASK_SYS_STATUS_##bank##_##name, \ 130 DA9121_MASK_SYS_EVENT_##bank##_E_##name, \ 131 DA9121_MASK_SYS_MASK_##bank##_M_##name, \ 132 notification, warning } 133 134 /* For second buck related event bits that are specific to DA9122, DA9220 variants */ 135 #define DA9xxx_STATUS(id, bank, name, notification, warning) \ 136 { id, bank, \ 137 DA9xxx_MASK_SYS_STATUS_##bank##_##name, \ 138 DA9xxx_MASK_SYS_EVENT_##bank##_E_##name, \ 139 DA9xxx_MASK_SYS_MASK_##bank##_M_##name, \ 140 notification, warning } 141 142 /* The status signals that may need servicing, depending on device variant. 143 * After assertion, they persist; so event is notified, the IRQ disabled, 144 * and status polled until clear again and IRQ is reenabled. 145 * 146 * SG/PG1/PG2 should be set when device first powers up and should never 147 * re-occur. When this driver starts, it is expected that these will have 148 * self-cleared for when the IRQs are enabled, so these should never be seen. 149 * If seen, the implication is that the device has reset. 150 * 151 * GPIO0/1/2 are not configured for use by default, so should not be seen. 152 */ 153 static const struct status_event_data status_event_handling[] = { 154 DA9xxx_STATUS(0, 0, SG, 0, "Handled E_SG\n"), 155 DA9121_STATUS(0, 0, TEMP_CRIT, (REGULATOR_EVENT_OVER_TEMP|REGULATOR_EVENT_DISABLE), NULL), 156 DA9121_STATUS(0, 0, TEMP_WARN, REGULATOR_EVENT_OVER_TEMP, NULL), 157 DA9121_STATUS(1, 1, PG1, 0, "Handled E_PG1\n"), 158 DA9121_STATUS(1, 1, OV1, REGULATOR_EVENT_REGULATION_OUT, NULL), 159 DA9121_STATUS(1, 1, UV1, REGULATOR_EVENT_UNDER_VOLTAGE, NULL), 160 DA9121_STATUS(1, 1, OC1, REGULATOR_EVENT_OVER_CURRENT, NULL), 161 DA9xxx_STATUS(2, 1, PG2, 0, "Handled E_PG2\n"), 162 DA9xxx_STATUS(2, 1, OV2, REGULATOR_EVENT_REGULATION_OUT, NULL), 163 DA9xxx_STATUS(2, 1, UV2, REGULATOR_EVENT_UNDER_VOLTAGE, NULL), 164 DA9xxx_STATUS(2, 1, OC2, REGULATOR_EVENT_OVER_CURRENT, NULL), 165 DA9121_STATUS(0, 2, GPIO0, 0, "Handled E_GPIO0\n"), 166 DA9121_STATUS(0, 2, GPIO1, 0, "Handled E_GPIO1\n"), 167 DA9121_STATUS(0, 2, GPIO2, 0, "Handled E_GPIO2\n"), 168 }; 169 170 static int da9121_get_current_limit(struct regulator_dev *rdev) 171 { 172 struct da9121 *chip = rdev_get_drvdata(rdev); 173 int id = rdev_get_id(rdev); 174 struct da9121_range *range = 175 variant_parameters[chip->variant_id].current_range; 176 unsigned int val = 0; 177 int ret = 0; 178 179 ret = regmap_read(chip->regmap, da9121_current_field[id].reg, &val); 180 if (ret < 0) { 181 dev_err(chip->dev, "Cannot read BUCK register: %d\n", ret); 182 goto error; 183 } 184 185 if (val < range->reg_min) { 186 ret = -EACCES; 187 goto error; 188 } 189 190 if (val > range->reg_max) { 191 ret = -EINVAL; 192 goto error; 193 } 194 195 return range->val_min + (range->val_stp * (val - range->reg_min)); 196 error: 197 return ret; 198 } 199 200 static int da9121_ceiling_selector(struct regulator_dev *rdev, 201 int min, int max, 202 unsigned int *selector) 203 { 204 struct da9121 *chip = rdev_get_drvdata(rdev); 205 struct da9121_range *range = 206 variant_parameters[chip->variant_id].current_range; 207 unsigned int level; 208 unsigned int i = 0; 209 unsigned int sel = 0; 210 int ret = 0; 211 212 if (range->val_min > max || range->val_max < min) { 213 dev_err(chip->dev, 214 "Requested current out of regulator capability\n"); 215 ret = -EINVAL; 216 goto error; 217 } 218 219 level = range->val_max; 220 for (i = range->reg_max; i >= range->reg_min; i--) { 221 if (level <= max) { 222 sel = i; 223 break; 224 } 225 level -= range->val_stp; 226 } 227 228 if (level < min) { 229 dev_err(chip->dev, 230 "Best match falls below minimum requested current\n"); 231 ret = -EINVAL; 232 goto error; 233 } 234 235 *selector = sel; 236 error: 237 return ret; 238 } 239 240 static int da9121_set_current_limit(struct regulator_dev *rdev, 241 int min_ua, int max_ua) 242 { 243 struct da9121 *chip = rdev_get_drvdata(rdev); 244 int id = rdev_get_id(rdev); 245 struct da9121_range *range = 246 variant_parameters[chip->variant_id].current_range; 247 unsigned int sel = 0; 248 int ret = 0; 249 250 if (min_ua < range->val_min || 251 max_ua > range->val_max) { 252 ret = -EINVAL; 253 goto error; 254 } 255 256 ret = da9121_ceiling_selector(rdev, min_ua, max_ua, &sel); 257 if (ret < 0) 258 goto error; 259 260 ret = regmap_update_bits(chip->regmap, 261 da9121_current_field[id].reg, 262 da9121_current_field[id].msk, 263 (unsigned int)sel); 264 if (ret < 0) 265 dev_err(chip->dev, "Cannot update BUCK current limit, err: %d\n", ret); 266 267 error: 268 return ret; 269 } 270 271 static unsigned int da9121_map_mode(unsigned int mode) 272 { 273 switch (mode) { 274 case DA9121_BUCK_MODE_FORCE_PWM: 275 return REGULATOR_MODE_FAST; 276 case DA9121_BUCK_MODE_FORCE_PWM_SHEDDING: 277 return REGULATOR_MODE_NORMAL; 278 case DA9121_BUCK_MODE_AUTO: 279 return REGULATOR_MODE_IDLE; 280 case DA9121_BUCK_MODE_FORCE_PFM: 281 return REGULATOR_MODE_STANDBY; 282 default: 283 return -EINVAL; 284 } 285 } 286 287 static int da9121_buck_set_mode(struct regulator_dev *rdev, unsigned int mode) 288 { 289 struct da9121 *chip = rdev_get_drvdata(rdev); 290 int id = rdev_get_id(rdev); 291 unsigned int val; 292 293 switch (mode) { 294 case REGULATOR_MODE_FAST: 295 val = DA9121_BUCK_MODE_FORCE_PWM; 296 break; 297 case REGULATOR_MODE_NORMAL: 298 val = DA9121_BUCK_MODE_FORCE_PWM_SHEDDING; 299 break; 300 case REGULATOR_MODE_IDLE: 301 val = DA9121_BUCK_MODE_AUTO; 302 break; 303 case REGULATOR_MODE_STANDBY: 304 val = DA9121_BUCK_MODE_FORCE_PFM; 305 break; 306 default: 307 return -EINVAL; 308 } 309 310 return regmap_update_bits(chip->regmap, 311 da9121_mode_field[id].reg, 312 da9121_mode_field[id].msk, 313 val); 314 } 315 316 static unsigned int da9121_buck_get_mode(struct regulator_dev *rdev) 317 { 318 struct da9121 *chip = rdev_get_drvdata(rdev); 319 int id = rdev_get_id(rdev); 320 unsigned int val; 321 int ret = 0; 322 323 ret = regmap_read(chip->regmap, da9121_mode_field[id].reg, &val); 324 if (ret < 0) { 325 dev_err(chip->dev, "Cannot read BUCK register: %d\n", ret); 326 return -EINVAL; 327 } 328 329 return da9121_map_mode(val & da9121_mode_field[id].msk); 330 } 331 332 static const struct regulator_ops da9121_buck_ops = { 333 .enable = regulator_enable_regmap, 334 .disable = regulator_disable_regmap, 335 .is_enabled = regulator_is_enabled_regmap, 336 .set_voltage_sel = regulator_set_voltage_sel_regmap, 337 .get_voltage_sel = regulator_get_voltage_sel_regmap, 338 .list_voltage = regulator_list_voltage_linear, 339 .get_current_limit = da9121_get_current_limit, 340 .set_current_limit = da9121_set_current_limit, 341 .set_mode = da9121_buck_set_mode, 342 .get_mode = da9121_buck_get_mode, 343 }; 344 345 static struct of_regulator_match da9121_matches[] = { 346 [DA9121_IDX_BUCK1] = { .name = "buck1" }, 347 [DA9121_IDX_BUCK2] = { .name = "buck2" }, 348 }; 349 350 static int da9121_of_parse_cb(struct device_node *np, 351 const struct regulator_desc *desc, 352 struct regulator_config *config) 353 { 354 struct da9121 *chip = config->driver_data; 355 struct da9121_pdata *pdata; 356 struct gpio_desc *ena_gpiod; 357 358 if (chip->pdata == NULL) { 359 pdata = devm_kzalloc(chip->dev, sizeof(*pdata), GFP_KERNEL); 360 if (!pdata) 361 return -ENOMEM; 362 } else { 363 pdata = chip->pdata; 364 } 365 366 pdata->num_buck++; 367 368 if (pdata->num_buck > variant_parameters[chip->variant_id].num_bucks) { 369 dev_err(chip->dev, "Error: excessive regulators for device\n"); 370 return -ENODEV; 371 } 372 373 ena_gpiod = fwnode_gpiod_get_index(of_fwnode_handle(np), "enable", 0, 374 GPIOD_OUT_HIGH | 375 GPIOD_FLAGS_BIT_NONEXCLUSIVE, 376 "da9121-enable"); 377 if (!IS_ERR(ena_gpiod)) 378 config->ena_gpiod = ena_gpiod; 379 380 if (variant_parameters[chip->variant_id].num_bucks == 2) { 381 uint32_t ripple_cancel; 382 uint32_t ripple_reg; 383 int ret; 384 385 if (of_property_read_u32(da9121_matches[pdata->num_buck-1].of_node, 386 "dlg,ripple-cancel", &ripple_cancel)) { 387 if (pdata->num_buck > 1) 388 ripple_reg = DA9xxx_REG_BUCK_BUCK2_7; 389 else 390 ripple_reg = DA9121_REG_BUCK_BUCK1_7; 391 392 ret = regmap_update_bits(chip->regmap, ripple_reg, 393 DA9xxx_MASK_BUCK_BUCKx_7_CHx_RIPPLE_CANCEL, 394 ripple_cancel); 395 if (ret < 0) 396 dev_err(chip->dev, "Cannot set ripple mode, err: %d\n", ret); 397 } 398 } 399 400 return 0; 401 } 402 403 #define DA9121_MIN_MV 300 404 #define DA9121_MAX_MV 1900 405 #define DA9121_STEP_MV 10 406 #define DA9121_MIN_SEL (DA9121_MIN_MV / DA9121_STEP_MV) 407 #define DA9121_N_VOLTAGES (((DA9121_MAX_MV - DA9121_MIN_MV) / DA9121_STEP_MV) \ 408 + 1 + DA9121_MIN_SEL) 409 410 static const struct regulator_desc da9121_reg = { 411 .id = DA9121_IDX_BUCK1, 412 .name = "da9121", 413 .of_match = "buck1", 414 .of_parse_cb = da9121_of_parse_cb, 415 .owner = THIS_MODULE, 416 .regulators_node = of_match_ptr("regulators"), 417 .of_map_mode = da9121_map_mode, 418 .ops = &da9121_buck_ops, 419 .type = REGULATOR_VOLTAGE, 420 .n_voltages = DA9121_N_VOLTAGES, 421 .min_uV = DA9121_MIN_MV * 1000, 422 .uV_step = DA9121_STEP_MV * 1000, 423 .linear_min_sel = DA9121_MIN_SEL, 424 .vsel_reg = DA9121_REG_BUCK_BUCK1_5, 425 .vsel_mask = DA9121_MASK_BUCK_BUCKx_5_CHx_A_VOUT, 426 .enable_reg = DA9121_REG_BUCK_BUCK1_0, 427 .enable_mask = DA9121_MASK_BUCK_BUCKx_0_CHx_EN, 428 /* Default value of BUCK_BUCK1_0.CH1_SRC_DVC_UP */ 429 .ramp_delay = 20000, 430 /* tBUCK_EN */ 431 .enable_time = 20, 432 }; 433 434 static const struct regulator_desc da9220_reg[2] = { 435 { 436 .id = DA9121_IDX_BUCK1, 437 .name = "DA9220/DA9132 BUCK1", 438 .of_match = "buck1", 439 .of_parse_cb = da9121_of_parse_cb, 440 .owner = THIS_MODULE, 441 .regulators_node = of_match_ptr("regulators"), 442 .of_map_mode = da9121_map_mode, 443 .ops = &da9121_buck_ops, 444 .type = REGULATOR_VOLTAGE, 445 .n_voltages = DA9121_N_VOLTAGES, 446 .min_uV = DA9121_MIN_MV * 1000, 447 .uV_step = DA9121_STEP_MV * 1000, 448 .linear_min_sel = DA9121_MIN_SEL, 449 .enable_reg = DA9121_REG_BUCK_BUCK1_0, 450 .enable_mask = DA9121_MASK_BUCK_BUCKx_0_CHx_EN, 451 .vsel_reg = DA9121_REG_BUCK_BUCK1_5, 452 .vsel_mask = DA9121_MASK_BUCK_BUCKx_5_CHx_A_VOUT, 453 }, 454 { 455 .id = DA9121_IDX_BUCK2, 456 .name = "DA9220/DA9132 BUCK2", 457 .of_match = "buck2", 458 .of_parse_cb = da9121_of_parse_cb, 459 .owner = THIS_MODULE, 460 .regulators_node = of_match_ptr("regulators"), 461 .of_map_mode = da9121_map_mode, 462 .ops = &da9121_buck_ops, 463 .type = REGULATOR_VOLTAGE, 464 .n_voltages = DA9121_N_VOLTAGES, 465 .min_uV = DA9121_MIN_MV * 1000, 466 .uV_step = DA9121_STEP_MV * 1000, 467 .linear_min_sel = DA9121_MIN_SEL, 468 .enable_reg = DA9xxx_REG_BUCK_BUCK2_0, 469 .enable_mask = DA9121_MASK_BUCK_BUCKx_0_CHx_EN, 470 .vsel_reg = DA9xxx_REG_BUCK_BUCK2_5, 471 .vsel_mask = DA9121_MASK_BUCK_BUCKx_5_CHx_A_VOUT, 472 } 473 }; 474 475 static const struct regulator_desc da9122_reg[2] = { 476 { 477 .id = DA9121_IDX_BUCK1, 478 .name = "DA9122/DA9131 BUCK1", 479 .of_match = "buck1", 480 .of_parse_cb = da9121_of_parse_cb, 481 .owner = THIS_MODULE, 482 .regulators_node = of_match_ptr("regulators"), 483 .of_map_mode = da9121_map_mode, 484 .ops = &da9121_buck_ops, 485 .type = REGULATOR_VOLTAGE, 486 .n_voltages = DA9121_N_VOLTAGES, 487 .min_uV = DA9121_MIN_MV * 1000, 488 .uV_step = DA9121_STEP_MV * 1000, 489 .linear_min_sel = DA9121_MIN_SEL, 490 .enable_reg = DA9121_REG_BUCK_BUCK1_0, 491 .enable_mask = DA9121_MASK_BUCK_BUCKx_0_CHx_EN, 492 .vsel_reg = DA9121_REG_BUCK_BUCK1_5, 493 .vsel_mask = DA9121_MASK_BUCK_BUCKx_5_CHx_A_VOUT, 494 }, 495 { 496 .id = DA9121_IDX_BUCK2, 497 .name = "DA9122/DA9131 BUCK2", 498 .of_match = "buck2", 499 .of_parse_cb = da9121_of_parse_cb, 500 .owner = THIS_MODULE, 501 .regulators_node = of_match_ptr("regulators"), 502 .of_map_mode = da9121_map_mode, 503 .ops = &da9121_buck_ops, 504 .type = REGULATOR_VOLTAGE, 505 .n_voltages = DA9121_N_VOLTAGES, 506 .min_uV = DA9121_MIN_MV * 1000, 507 .uV_step = DA9121_STEP_MV * 1000, 508 .linear_min_sel = DA9121_MIN_SEL, 509 .enable_reg = DA9xxx_REG_BUCK_BUCK2_0, 510 .enable_mask = DA9121_MASK_BUCK_BUCKx_0_CHx_EN, 511 .vsel_reg = DA9xxx_REG_BUCK_BUCK2_5, 512 .vsel_mask = DA9121_MASK_BUCK_BUCKx_5_CHx_A_VOUT, 513 } 514 }; 515 516 static const struct regulator_desc da9217_reg = { 517 .id = DA9121_IDX_BUCK1, 518 .name = "DA9217 BUCK1", 519 .of_match = "buck1", 520 .of_parse_cb = da9121_of_parse_cb, 521 .owner = THIS_MODULE, 522 .regulators_node = of_match_ptr("regulators"), 523 .of_map_mode = da9121_map_mode, 524 .ops = &da9121_buck_ops, 525 .type = REGULATOR_VOLTAGE, 526 .n_voltages = DA9121_N_VOLTAGES, 527 .min_uV = DA9121_MIN_MV * 1000, 528 .uV_step = DA9121_STEP_MV * 1000, 529 .linear_min_sel = DA9121_MIN_SEL, 530 .enable_reg = DA9121_REG_BUCK_BUCK1_0, 531 .enable_mask = DA9121_MASK_BUCK_BUCKx_0_CHx_EN, 532 .vsel_reg = DA9121_REG_BUCK_BUCK1_5, 533 .vsel_mask = DA9121_MASK_BUCK_BUCKx_5_CHx_A_VOUT, 534 }; 535 536 static const struct regulator_desc *local_da9121_regulators[][DA9121_IDX_MAX] = { 537 [DA9121_TYPE_DA9121_DA9130] = { &da9121_reg, NULL }, 538 [DA9121_TYPE_DA9220_DA9132] = { &da9220_reg[0], &da9220_reg[1] }, 539 [DA9121_TYPE_DA9122_DA9131] = { &da9122_reg[0], &da9122_reg[1] }, 540 [DA9121_TYPE_DA9217] = { &da9217_reg, NULL }, 541 }; 542 543 static void da9121_status_poll_on(struct work_struct *work) 544 { 545 struct da9121 *chip = container_of(work, struct da9121, work.work); 546 int status[3] = {0}; 547 int clear[3] = {0}; 548 unsigned long delay; 549 int i; 550 int ret; 551 552 ret = regmap_bulk_read(chip->regmap, DA9121_REG_SYS_STATUS_0, status, 2); 553 if (ret < 0) { 554 dev_err(chip->dev, 555 "Failed to read STATUS registers: %d\n", ret); 556 goto error; 557 } 558 559 /* Possible events are tested to be within range for the variant, potentially 560 * masked by the IRQ handler (not just warned about), as having been masked, 561 * and the respective state cleared - then flagged to unmask for next IRQ. 562 */ 563 for (i = 0; i < ARRAY_SIZE(status_event_handling); i++) { 564 const struct status_event_data *item = &status_event_handling[i]; 565 int reg_idx = item->reg_index; 566 bool relevant = (item->buck_id <= variant_parameters[chip->variant_id].num_bucks); 567 bool supported = (item->warn == NULL); 568 bool persisting = (chip->persistent[reg_idx] & item->event_bit); 569 bool now_cleared = !(status[reg_idx] & item->status_bit); 570 571 if (relevant && supported && persisting && now_cleared) { 572 clear[reg_idx] |= item->mask_bit; 573 chip->persistent[reg_idx] &= ~item->event_bit; 574 } 575 } 576 577 for (i = 0; i < 2; i++) { 578 if (clear[i]) { 579 unsigned int reg = DA9121_REG_SYS_MASK_0 + i; 580 unsigned int mbit = clear[i]; 581 582 ret = regmap_update_bits(chip->regmap, reg, mbit, 0); 583 if (ret < 0) { 584 dev_err(chip->dev, 585 "Failed to unmask 0x%02x %d\n", 586 reg, ret); 587 goto error; 588 } 589 } 590 } 591 592 if (chip->persistent[0] | chip->persistent[1]) { 593 delay = msecs_to_jiffies(chip->passive_delay); 594 queue_delayed_work(system_freezable_wq, &chip->work, delay); 595 } 596 597 error: 598 return; 599 } 600 601 static irqreturn_t da9121_irq_handler(int irq, void *data) 602 { 603 struct da9121 *chip = data; 604 struct regulator_dev *rdev; 605 int event[3] = {0}; 606 int handled[3] = {0}; 607 int mask[3] = {0}; 608 int ret = IRQ_NONE; 609 int i; 610 int err; 611 612 err = regmap_bulk_read(chip->regmap, DA9121_REG_SYS_EVENT_0, event, 3); 613 if (err < 0) { 614 dev_err(chip->dev, "Failed to read EVENT registers %d\n", err); 615 ret = IRQ_NONE; 616 goto error; 617 } 618 619 err = regmap_bulk_read(chip->regmap, DA9121_REG_SYS_MASK_0, mask, 3); 620 if (err < 0) { 621 dev_err(chip->dev, 622 "Failed to read MASK registers: %d\n", ret); 623 ret = IRQ_NONE; 624 goto error; 625 } 626 627 rdev = chip->rdev[DA9121_IDX_BUCK1]; 628 629 /* Possible events are tested to be within range for the variant, currently 630 * enabled, and having triggered this IRQ. The event may then be notified, 631 * or a warning given for unexpected events - those from device POR, and 632 * currently unsupported GPIO configurations. 633 */ 634 for (i = 0; i < ARRAY_SIZE(status_event_handling); i++) { 635 const struct status_event_data *item = &status_event_handling[i]; 636 int reg_idx = item->reg_index; 637 bool relevant = (item->buck_id <= variant_parameters[chip->variant_id].num_bucks); 638 bool enabled = !(mask[reg_idx] & item->mask_bit); 639 bool active = (event[reg_idx] & item->event_bit); 640 bool notify = (item->warn == NULL); 641 642 if (relevant && enabled && active) { 643 if (notify) { 644 chip->persistent[reg_idx] |= item->event_bit; 645 regulator_notifier_call_chain(rdev, item->notification, NULL); 646 } else { 647 dev_warn(chip->dev, item->warn); 648 handled[reg_idx] |= item->event_bit; 649 ret = IRQ_HANDLED; 650 } 651 } 652 } 653 654 for (i = 0; i < 3; i++) { 655 if (event[i] != handled[i]) { 656 dev_warn(chip->dev, 657 "Unhandled event(s) in bank%d 0x%02x\n", i, 658 event[i] ^ handled[i]); 659 } 660 } 661 662 /* Mask the interrupts for persistent events OV, OC, UV, WARN, CRIT */ 663 for (i = 0; i < 2; i++) { 664 if (handled[i]) { 665 unsigned int reg = DA9121_REG_SYS_MASK_0 + i; 666 unsigned int mbit = handled[i]; 667 668 err = regmap_update_bits(chip->regmap, reg, mbit, mbit); 669 if (err < 0) { 670 dev_err(chip->dev, 671 "Failed to mask 0x%02x interrupt %d\n", 672 reg, err); 673 ret = IRQ_NONE; 674 goto error; 675 } 676 } 677 } 678 679 /* clear the events */ 680 if (handled[0] | handled[1] | handled[2]) { 681 err = regmap_bulk_write(chip->regmap, DA9121_REG_SYS_EVENT_0, handled, 3); 682 if (err < 0) { 683 dev_err(chip->dev, "Fail to write EVENTs %d\n", err); 684 ret = IRQ_NONE; 685 goto error; 686 } 687 } 688 689 queue_delayed_work(system_freezable_wq, &chip->work, 0); 690 error: 691 return ret; 692 } 693 694 static int da9121_set_regulator_config(struct da9121 *chip) 695 { 696 struct regulator_config config = { }; 697 unsigned int max_matches = variant_parameters[chip->variant_id].num_bucks; 698 int ret = 0; 699 int i; 700 701 for (i = 0; i < max_matches; i++) { 702 const struct regulator_desc *regl_desc = 703 local_da9121_regulators[chip->variant_id][i]; 704 705 config.dev = chip->dev; 706 config.driver_data = chip; 707 config.regmap = chip->regmap; 708 709 chip->rdev[i] = devm_regulator_register(chip->dev, 710 regl_desc, &config); 711 if (IS_ERR(chip->rdev[i])) { 712 dev_err(chip->dev, "Failed to register regulator %s, %d/%d\n", 713 regl_desc->name, (i+1), max_matches); 714 ret = PTR_ERR(chip->rdev[i]); 715 goto error; 716 } 717 } 718 719 error: 720 return ret; 721 } 722 723 /* DA9121 chip register model */ 724 static const struct regmap_range da9121_1ch_readable_ranges[] = { 725 regmap_reg_range(DA9121_REG_SYS_STATUS_0, DA9121_REG_SYS_MASK_3), 726 regmap_reg_range(DA9121_REG_SYS_CONFIG_2, DA9121_REG_SYS_CONFIG_3), 727 regmap_reg_range(DA9121_REG_SYS_GPIO0_0, DA9121_REG_SYS_GPIO2_1), 728 regmap_reg_range(DA9121_REG_BUCK_BUCK1_0, DA9121_REG_BUCK_BUCK1_6), 729 regmap_reg_range(DA9121_REG_OTP_DEVICE_ID, DA9121_REG_OTP_CONFIG_ID), 730 }; 731 732 static const struct regmap_access_table da9121_1ch_readable_table = { 733 .yes_ranges = da9121_1ch_readable_ranges, 734 .n_yes_ranges = ARRAY_SIZE(da9121_1ch_readable_ranges), 735 }; 736 737 static const struct regmap_range da9121_2ch_readable_ranges[] = { 738 regmap_reg_range(DA9121_REG_SYS_STATUS_0, DA9121_REG_SYS_MASK_3), 739 regmap_reg_range(DA9121_REG_SYS_CONFIG_2, DA9121_REG_SYS_CONFIG_3), 740 regmap_reg_range(DA9121_REG_SYS_GPIO0_0, DA9121_REG_SYS_GPIO2_1), 741 regmap_reg_range(DA9121_REG_BUCK_BUCK1_0, DA9121_REG_BUCK_BUCK1_7), 742 regmap_reg_range(DA9xxx_REG_BUCK_BUCK2_0, DA9xxx_REG_BUCK_BUCK2_7), 743 regmap_reg_range(DA9121_REG_OTP_DEVICE_ID, DA9121_REG_OTP_CONFIG_ID), 744 }; 745 746 static const struct regmap_access_table da9121_2ch_readable_table = { 747 .yes_ranges = da9121_2ch_readable_ranges, 748 .n_yes_ranges = ARRAY_SIZE(da9121_2ch_readable_ranges), 749 }; 750 751 static const struct regmap_range da9121_1ch_writeable_ranges[] = { 752 regmap_reg_range(DA9121_REG_SYS_EVENT_0, DA9121_REG_SYS_MASK_3), 753 regmap_reg_range(DA9121_REG_SYS_CONFIG_2, DA9121_REG_SYS_CONFIG_3), 754 regmap_reg_range(DA9121_REG_SYS_GPIO0_0, DA9121_REG_SYS_GPIO2_1), 755 regmap_reg_range(DA9121_REG_BUCK_BUCK1_0, DA9121_REG_BUCK_BUCK1_2), 756 regmap_reg_range(DA9121_REG_BUCK_BUCK1_4, DA9121_REG_BUCK_BUCK1_6), 757 }; 758 759 static const struct regmap_access_table da9121_1ch_writeable_table = { 760 .yes_ranges = da9121_1ch_writeable_ranges, 761 .n_yes_ranges = ARRAY_SIZE(da9121_1ch_writeable_ranges), 762 }; 763 764 static const struct regmap_range da9121_2ch_writeable_ranges[] = { 765 regmap_reg_range(DA9121_REG_SYS_EVENT_0, DA9121_REG_SYS_MASK_3), 766 regmap_reg_range(DA9121_REG_SYS_CONFIG_2, DA9121_REG_SYS_CONFIG_3), 767 regmap_reg_range(DA9121_REG_SYS_GPIO0_0, DA9121_REG_SYS_GPIO2_1), 768 regmap_reg_range(DA9121_REG_BUCK_BUCK1_0, DA9121_REG_BUCK_BUCK1_2), 769 regmap_reg_range(DA9121_REG_BUCK_BUCK1_4, DA9121_REG_BUCK_BUCK1_7), 770 regmap_reg_range(DA9xxx_REG_BUCK_BUCK2_0, DA9xxx_REG_BUCK_BUCK2_2), 771 regmap_reg_range(DA9xxx_REG_BUCK_BUCK2_4, DA9xxx_REG_BUCK_BUCK2_7), 772 }; 773 774 static const struct regmap_access_table da9121_2ch_writeable_table = { 775 .yes_ranges = da9121_2ch_writeable_ranges, 776 .n_yes_ranges = ARRAY_SIZE(da9121_2ch_writeable_ranges), 777 }; 778 779 780 static const struct regmap_range da9121_volatile_ranges[] = { 781 regmap_reg_range(DA9121_REG_SYS_STATUS_0, DA9121_REG_SYS_EVENT_2), 782 regmap_reg_range(DA9121_REG_SYS_GPIO0_0, DA9121_REG_SYS_GPIO2_1), 783 regmap_reg_range(DA9121_REG_BUCK_BUCK1_0, DA9121_REG_BUCK_BUCK1_6), 784 }; 785 786 static const struct regmap_access_table da9121_volatile_table = { 787 .yes_ranges = da9121_volatile_ranges, 788 .n_yes_ranges = ARRAY_SIZE(da9121_volatile_ranges), 789 }; 790 791 /* DA9121 regmap config for 1 channel variants */ 792 static struct regmap_config da9121_1ch_regmap_config = { 793 .reg_bits = 8, 794 .val_bits = 8, 795 .max_register = DA9121_REG_OTP_CONFIG_ID, 796 .rd_table = &da9121_1ch_readable_table, 797 .wr_table = &da9121_1ch_writeable_table, 798 .volatile_table = &da9121_volatile_table, 799 .cache_type = REGCACHE_RBTREE, 800 }; 801 802 /* DA9121 regmap config for 2 channel variants */ 803 static struct regmap_config da9121_2ch_regmap_config = { 804 .reg_bits = 8, 805 .val_bits = 8, 806 .max_register = DA9121_REG_OTP_CONFIG_ID, 807 .rd_table = &da9121_2ch_readable_table, 808 .wr_table = &da9121_2ch_writeable_table, 809 .volatile_table = &da9121_volatile_table, 810 .cache_type = REGCACHE_RBTREE, 811 }; 812 813 static int da9121_check_device_type(struct i2c_client *i2c, struct da9121 *chip) 814 { 815 u32 device_id; 816 u32 variant_id; 817 u8 variant_mrc, variant_vrc; 818 char *type; 819 bool config_match = false; 820 int ret = 0; 821 822 ret = regmap_read(chip->regmap, DA9121_REG_OTP_DEVICE_ID, &device_id); 823 if (ret < 0) { 824 dev_err(chip->dev, "Cannot read device ID: %d\n", ret); 825 goto error; 826 } 827 828 ret = regmap_read(chip->regmap, DA9121_REG_OTP_VARIANT_ID, &variant_id); 829 if (ret < 0) { 830 dev_err(chip->dev, "Cannot read variant ID: %d\n", ret); 831 goto error; 832 } 833 834 if (device_id != DA9121_DEVICE_ID) { 835 dev_err(chip->dev, "Invalid device ID: 0x%02x\n", device_id); 836 ret = -ENODEV; 837 goto error; 838 } 839 840 variant_vrc = variant_id & DA9121_MASK_OTP_VARIANT_ID_VRC; 841 842 switch (chip->subvariant_id) { 843 case DA9121_SUBTYPE_DA9121: 844 type = "DA9121"; 845 config_match = (variant_vrc == DA9121_VARIANT_VRC); 846 break; 847 case DA9121_SUBTYPE_DA9130: 848 type = "DA9130"; 849 config_match = (variant_vrc == DA9130_VARIANT_VRC); 850 break; 851 case DA9121_SUBTYPE_DA9220: 852 type = "DA9220"; 853 config_match = (variant_vrc == DA9220_VARIANT_VRC); 854 break; 855 case DA9121_SUBTYPE_DA9132: 856 type = "DA9132"; 857 config_match = (variant_vrc == DA9132_VARIANT_VRC); 858 break; 859 case DA9121_SUBTYPE_DA9122: 860 type = "DA9122"; 861 config_match = (variant_vrc == DA9122_VARIANT_VRC); 862 break; 863 case DA9121_SUBTYPE_DA9131: 864 type = "DA9131"; 865 config_match = (variant_vrc == DA9131_VARIANT_VRC); 866 break; 867 case DA9121_SUBTYPE_DA9217: 868 type = "DA9217"; 869 config_match = (variant_vrc == DA9217_VARIANT_VRC); 870 break; 871 default: 872 type = "Unknown"; 873 break; 874 } 875 876 dev_info(chip->dev, 877 "Device detected (device-ID: 0x%02X, var-ID: 0x%02X, %s)\n", 878 device_id, variant_id, type); 879 880 if (!config_match) { 881 dev_err(chip->dev, "Device tree configuration does not match detected device.\n"); 882 ret = -EINVAL; 883 goto error; 884 } 885 886 variant_mrc = (variant_id & DA9121_MASK_OTP_VARIANT_ID_MRC) 887 >> DA9121_SHIFT_OTP_VARIANT_ID_MRC; 888 889 if ((device_id == DA9121_DEVICE_ID) && 890 (variant_mrc < DA9121_VARIANT_MRC_BASE)) { 891 dev_err(chip->dev, 892 "Cannot support variant MRC: 0x%02X\n", variant_mrc); 893 ret = -EINVAL; 894 } 895 error: 896 return ret; 897 } 898 899 static int da9121_assign_chip_model(struct i2c_client *i2c, 900 struct da9121 *chip) 901 { 902 struct regmap_config *regmap; 903 int ret = 0; 904 905 chip->dev = &i2c->dev; 906 907 /* Use configured subtype to select the regulator descriptor index and 908 * register map, common to both consumer and automotive grade variants 909 */ 910 switch (chip->subvariant_id) { 911 case DA9121_SUBTYPE_DA9121: 912 case DA9121_SUBTYPE_DA9130: 913 chip->variant_id = DA9121_TYPE_DA9121_DA9130; 914 regmap = &da9121_1ch_regmap_config; 915 break; 916 case DA9121_SUBTYPE_DA9217: 917 chip->variant_id = DA9121_TYPE_DA9217; 918 regmap = &da9121_1ch_regmap_config; 919 break; 920 case DA9121_SUBTYPE_DA9122: 921 case DA9121_SUBTYPE_DA9131: 922 chip->variant_id = DA9121_TYPE_DA9122_DA9131; 923 regmap = &da9121_2ch_regmap_config; 924 break; 925 case DA9121_SUBTYPE_DA9220: 926 case DA9121_SUBTYPE_DA9132: 927 chip->variant_id = DA9121_TYPE_DA9220_DA9132; 928 regmap = &da9121_2ch_regmap_config; 929 break; 930 } 931 932 /* Set these up for of_regulator_match call which may want .of_map_modes */ 933 da9121_matches[0].desc = local_da9121_regulators[chip->variant_id][0]; 934 da9121_matches[1].desc = local_da9121_regulators[chip->variant_id][1]; 935 936 chip->regmap = devm_regmap_init_i2c(i2c, regmap); 937 if (IS_ERR(chip->regmap)) { 938 ret = PTR_ERR(chip->regmap); 939 dev_err(chip->dev, "Failed to configure a register map: %d\n", 940 ret); 941 return ret; 942 } 943 944 ret = da9121_check_device_type(i2c, chip); 945 946 return ret; 947 } 948 949 static int da9121_config_irq(struct i2c_client *i2c, 950 struct da9121 *chip) 951 { 952 unsigned int p_delay = DA9121_DEFAULT_POLLING_PERIOD_MS; 953 const int mask_all[4] = { 0, 0, 0xFF, 0xFF }; 954 int ret = 0; 955 956 chip->chip_irq = i2c->irq; 957 958 if (chip->chip_irq != 0) { 959 if (!of_property_read_u32(chip->dev->of_node, 960 "dlg,irq-polling-delay-passive-ms", 961 &p_delay)) { 962 if (p_delay < DA9121_MIN_POLLING_PERIOD_MS || 963 p_delay > DA9121_MAX_POLLING_PERIOD_MS) { 964 dev_warn(chip->dev, 965 "Out-of-range polling period %d ms\n", 966 p_delay); 967 p_delay = DA9121_DEFAULT_POLLING_PERIOD_MS; 968 } 969 } 970 971 chip->passive_delay = p_delay; 972 973 ret = request_threaded_irq(chip->chip_irq, NULL, 974 da9121_irq_handler, 975 IRQF_TRIGGER_LOW|IRQF_ONESHOT, 976 "da9121", chip); 977 if (ret != 0) { 978 dev_err(chip->dev, "Failed IRQ request: %d\n", 979 chip->chip_irq); 980 goto error; 981 } 982 983 ret = regmap_bulk_write(chip->regmap, DA9121_REG_SYS_MASK_0, mask_all, 4); 984 if (ret != 0) { 985 dev_err(chip->dev, "Failed to set IRQ masks: %d\n", 986 ret); 987 goto regmap_error; 988 } 989 990 INIT_DELAYED_WORK(&chip->work, da9121_status_poll_on); 991 dev_info(chip->dev, "Interrupt polling period set at %d ms\n", 992 chip->passive_delay); 993 } 994 error: 995 return ret; 996 regmap_error: 997 free_irq(chip->chip_irq, chip); 998 return ret; 999 } 1000 1001 static const struct of_device_id da9121_dt_ids[] = { 1002 { .compatible = "dlg,da9121", .data = (void *) DA9121_SUBTYPE_DA9121 }, 1003 { .compatible = "dlg,da9130", .data = (void *) DA9121_SUBTYPE_DA9130 }, 1004 { .compatible = "dlg,da9217", .data = (void *) DA9121_SUBTYPE_DA9217 }, 1005 { .compatible = "dlg,da9122", .data = (void *) DA9121_SUBTYPE_DA9122 }, 1006 { .compatible = "dlg,da9131", .data = (void *) DA9121_SUBTYPE_DA9131 }, 1007 { .compatible = "dlg,da9220", .data = (void *) DA9121_SUBTYPE_DA9220 }, 1008 { .compatible = "dlg,da9132", .data = (void *) DA9121_SUBTYPE_DA9132 }, 1009 { } 1010 }; 1011 MODULE_DEVICE_TABLE(of, da9121_dt_ids); 1012 1013 static inline int da9121_of_get_id(struct device *dev) 1014 { 1015 const struct of_device_id *id = of_match_device(da9121_dt_ids, dev); 1016 1017 if (!id) { 1018 dev_err(dev, "%s: Failed\n", __func__); 1019 return -EINVAL; 1020 } 1021 return (uintptr_t)id->data; 1022 } 1023 1024 static int da9121_i2c_probe(struct i2c_client *i2c, 1025 const struct i2c_device_id *id) 1026 { 1027 struct da9121 *chip; 1028 const int mask_all[4] = { 0xFF, 0xFF, 0xFF, 0xFF }; 1029 int ret = 0; 1030 1031 chip = devm_kzalloc(&i2c->dev, sizeof(struct da9121), GFP_KERNEL); 1032 if (!chip) { 1033 ret = -ENOMEM; 1034 goto error; 1035 } 1036 1037 chip->pdata = i2c->dev.platform_data; 1038 chip->subvariant_id = da9121_of_get_id(&i2c->dev); 1039 1040 ret = da9121_assign_chip_model(i2c, chip); 1041 if (ret < 0) 1042 goto error; 1043 1044 ret = regmap_bulk_write(chip->regmap, DA9121_REG_SYS_MASK_0, mask_all, 4); 1045 if (ret != 0) { 1046 dev_err(chip->dev, "Failed to set IRQ masks: %d\n", ret); 1047 goto error; 1048 } 1049 1050 ret = da9121_set_regulator_config(chip); 1051 if (ret < 0) 1052 goto error; 1053 1054 ret = da9121_config_irq(i2c, chip); 1055 1056 error: 1057 return ret; 1058 } 1059 1060 static int da9121_i2c_remove(struct i2c_client *i2c) 1061 { 1062 struct da9121 *chip = i2c_get_clientdata(i2c); 1063 const int mask_all[4] = { 0xFF, 0xFF, 0xFF, 0xFF }; 1064 int ret = 0; 1065 1066 free_irq(chip->chip_irq, chip); 1067 cancel_delayed_work_sync(&chip->work); 1068 1069 ret = regmap_bulk_write(chip->regmap, DA9121_REG_SYS_MASK_0, mask_all, 4); 1070 if (ret != 0) 1071 dev_err(chip->dev, "Failed to set IRQ masks: %d\n", ret); 1072 return ret; 1073 } 1074 1075 static const struct i2c_device_id da9121_i2c_id[] = { 1076 {"da9121", DA9121_TYPE_DA9121_DA9130}, 1077 {"da9130", DA9121_TYPE_DA9121_DA9130}, 1078 {"da9217", DA9121_TYPE_DA9217}, 1079 {"da9122", DA9121_TYPE_DA9122_DA9131}, 1080 {"da9131", DA9121_TYPE_DA9122_DA9131}, 1081 {"da9220", DA9121_TYPE_DA9220_DA9132}, 1082 {"da9132", DA9121_TYPE_DA9220_DA9132}, 1083 {}, 1084 }; 1085 MODULE_DEVICE_TABLE(i2c, da9121_i2c_id); 1086 1087 static struct i2c_driver da9121_regulator_driver = { 1088 .driver = { 1089 .name = "da9121", 1090 .of_match_table = of_match_ptr(da9121_dt_ids), 1091 }, 1092 .probe = da9121_i2c_probe, 1093 .remove = da9121_i2c_remove, 1094 .id_table = da9121_i2c_id, 1095 }; 1096 1097 module_i2c_driver(da9121_regulator_driver); 1098 1099 MODULE_LICENSE("GPL v2"); 1100