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 REGULATOR_MODE_INVALID; 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, mode; 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 mode = da9121_map_mode(val & da9121_mode_field[id].msk); 330 if (mode == REGULATOR_MODE_INVALID) 331 return -EINVAL; 332 333 return mode; 334 } 335 336 static const struct regulator_ops da9121_buck_ops = { 337 .enable = regulator_enable_regmap, 338 .disable = regulator_disable_regmap, 339 .is_enabled = regulator_is_enabled_regmap, 340 .set_voltage_sel = regulator_set_voltage_sel_regmap, 341 .get_voltage_sel = regulator_get_voltage_sel_regmap, 342 .list_voltage = regulator_list_voltage_linear, 343 .get_current_limit = da9121_get_current_limit, 344 .set_current_limit = da9121_set_current_limit, 345 .set_mode = da9121_buck_set_mode, 346 .get_mode = da9121_buck_get_mode, 347 }; 348 349 static struct of_regulator_match da9121_matches[] = { 350 [DA9121_IDX_BUCK1] = { .name = "buck1" }, 351 [DA9121_IDX_BUCK2] = { .name = "buck2" }, 352 }; 353 354 static int da9121_of_parse_cb(struct device_node *np, 355 const struct regulator_desc *desc, 356 struct regulator_config *config) 357 { 358 struct da9121 *chip = config->driver_data; 359 struct da9121_pdata *pdata; 360 struct gpio_desc *ena_gpiod; 361 362 if (chip->pdata == NULL) { 363 pdata = devm_kzalloc(chip->dev, sizeof(*pdata), GFP_KERNEL); 364 if (!pdata) 365 return -ENOMEM; 366 } else { 367 pdata = chip->pdata; 368 } 369 370 pdata->num_buck++; 371 372 if (pdata->num_buck > variant_parameters[chip->variant_id].num_bucks) { 373 dev_err(chip->dev, "Error: excessive regulators for device\n"); 374 return -ENODEV; 375 } 376 377 ena_gpiod = fwnode_gpiod_get_index(of_fwnode_handle(np), "enable", 0, 378 GPIOD_OUT_HIGH | 379 GPIOD_FLAGS_BIT_NONEXCLUSIVE, 380 "da9121-enable"); 381 if (!IS_ERR(ena_gpiod)) 382 config->ena_gpiod = ena_gpiod; 383 384 if (variant_parameters[chip->variant_id].num_bucks == 2) { 385 uint32_t ripple_cancel; 386 uint32_t ripple_reg; 387 int ret; 388 389 if (of_property_read_u32(da9121_matches[pdata->num_buck-1].of_node, 390 "dlg,ripple-cancel", &ripple_cancel)) { 391 if (pdata->num_buck > 1) 392 ripple_reg = DA9xxx_REG_BUCK_BUCK2_7; 393 else 394 ripple_reg = DA9121_REG_BUCK_BUCK1_7; 395 396 ret = regmap_update_bits(chip->regmap, ripple_reg, 397 DA9xxx_MASK_BUCK_BUCKx_7_CHx_RIPPLE_CANCEL, 398 ripple_cancel); 399 if (ret < 0) 400 dev_err(chip->dev, "Cannot set ripple mode, err: %d\n", ret); 401 } 402 } 403 404 return 0; 405 } 406 407 #define DA9121_MIN_MV 300 408 #define DA9121_MAX_MV 1900 409 #define DA9121_STEP_MV 10 410 #define DA9121_MIN_SEL (DA9121_MIN_MV / DA9121_STEP_MV) 411 #define DA9121_N_VOLTAGES (((DA9121_MAX_MV - DA9121_MIN_MV) / DA9121_STEP_MV) \ 412 + 1 + DA9121_MIN_SEL) 413 414 static const struct regulator_desc da9121_reg = { 415 .id = DA9121_IDX_BUCK1, 416 .name = "da9121", 417 .of_match = "buck1", 418 .of_parse_cb = da9121_of_parse_cb, 419 .owner = THIS_MODULE, 420 .regulators_node = of_match_ptr("regulators"), 421 .of_map_mode = da9121_map_mode, 422 .ops = &da9121_buck_ops, 423 .type = REGULATOR_VOLTAGE, 424 .n_voltages = DA9121_N_VOLTAGES, 425 .min_uV = DA9121_MIN_MV * 1000, 426 .uV_step = DA9121_STEP_MV * 1000, 427 .linear_min_sel = DA9121_MIN_SEL, 428 .vsel_reg = DA9121_REG_BUCK_BUCK1_5, 429 .vsel_mask = DA9121_MASK_BUCK_BUCKx_5_CHx_A_VOUT, 430 .enable_reg = DA9121_REG_BUCK_BUCK1_0, 431 .enable_mask = DA9121_MASK_BUCK_BUCKx_0_CHx_EN, 432 /* Default value of BUCK_BUCK1_0.CH1_SRC_DVC_UP */ 433 .ramp_delay = 20000, 434 /* tBUCK_EN */ 435 .enable_time = 20, 436 }; 437 438 static const struct regulator_desc da9220_reg[2] = { 439 { 440 .id = DA9121_IDX_BUCK1, 441 .name = "DA9220/DA9132 BUCK1", 442 .of_match = "buck1", 443 .of_parse_cb = da9121_of_parse_cb, 444 .owner = THIS_MODULE, 445 .regulators_node = of_match_ptr("regulators"), 446 .of_map_mode = da9121_map_mode, 447 .ops = &da9121_buck_ops, 448 .type = REGULATOR_VOLTAGE, 449 .n_voltages = DA9121_N_VOLTAGES, 450 .min_uV = DA9121_MIN_MV * 1000, 451 .uV_step = DA9121_STEP_MV * 1000, 452 .linear_min_sel = DA9121_MIN_SEL, 453 .enable_reg = DA9121_REG_BUCK_BUCK1_0, 454 .enable_mask = DA9121_MASK_BUCK_BUCKx_0_CHx_EN, 455 .vsel_reg = DA9121_REG_BUCK_BUCK1_5, 456 .vsel_mask = DA9121_MASK_BUCK_BUCKx_5_CHx_A_VOUT, 457 }, 458 { 459 .id = DA9121_IDX_BUCK2, 460 .name = "DA9220/DA9132 BUCK2", 461 .of_match = "buck2", 462 .of_parse_cb = da9121_of_parse_cb, 463 .owner = THIS_MODULE, 464 .regulators_node = of_match_ptr("regulators"), 465 .of_map_mode = da9121_map_mode, 466 .ops = &da9121_buck_ops, 467 .type = REGULATOR_VOLTAGE, 468 .n_voltages = DA9121_N_VOLTAGES, 469 .min_uV = DA9121_MIN_MV * 1000, 470 .uV_step = DA9121_STEP_MV * 1000, 471 .linear_min_sel = DA9121_MIN_SEL, 472 .enable_reg = DA9xxx_REG_BUCK_BUCK2_0, 473 .enable_mask = DA9121_MASK_BUCK_BUCKx_0_CHx_EN, 474 .vsel_reg = DA9xxx_REG_BUCK_BUCK2_5, 475 .vsel_mask = DA9121_MASK_BUCK_BUCKx_5_CHx_A_VOUT, 476 } 477 }; 478 479 static const struct regulator_desc da9122_reg[2] = { 480 { 481 .id = DA9121_IDX_BUCK1, 482 .name = "DA9122/DA9131 BUCK1", 483 .of_match = "buck1", 484 .of_parse_cb = da9121_of_parse_cb, 485 .owner = THIS_MODULE, 486 .regulators_node = of_match_ptr("regulators"), 487 .of_map_mode = da9121_map_mode, 488 .ops = &da9121_buck_ops, 489 .type = REGULATOR_VOLTAGE, 490 .n_voltages = DA9121_N_VOLTAGES, 491 .min_uV = DA9121_MIN_MV * 1000, 492 .uV_step = DA9121_STEP_MV * 1000, 493 .linear_min_sel = DA9121_MIN_SEL, 494 .enable_reg = DA9121_REG_BUCK_BUCK1_0, 495 .enable_mask = DA9121_MASK_BUCK_BUCKx_0_CHx_EN, 496 .vsel_reg = DA9121_REG_BUCK_BUCK1_5, 497 .vsel_mask = DA9121_MASK_BUCK_BUCKx_5_CHx_A_VOUT, 498 }, 499 { 500 .id = DA9121_IDX_BUCK2, 501 .name = "DA9122/DA9131 BUCK2", 502 .of_match = "buck2", 503 .of_parse_cb = da9121_of_parse_cb, 504 .owner = THIS_MODULE, 505 .regulators_node = of_match_ptr("regulators"), 506 .of_map_mode = da9121_map_mode, 507 .ops = &da9121_buck_ops, 508 .type = REGULATOR_VOLTAGE, 509 .n_voltages = DA9121_N_VOLTAGES, 510 .min_uV = DA9121_MIN_MV * 1000, 511 .uV_step = DA9121_STEP_MV * 1000, 512 .linear_min_sel = DA9121_MIN_SEL, 513 .enable_reg = DA9xxx_REG_BUCK_BUCK2_0, 514 .enable_mask = DA9121_MASK_BUCK_BUCKx_0_CHx_EN, 515 .vsel_reg = DA9xxx_REG_BUCK_BUCK2_5, 516 .vsel_mask = DA9121_MASK_BUCK_BUCKx_5_CHx_A_VOUT, 517 } 518 }; 519 520 static const struct regulator_desc da9217_reg = { 521 .id = DA9121_IDX_BUCK1, 522 .name = "DA9217 BUCK1", 523 .of_match = "buck1", 524 .of_parse_cb = da9121_of_parse_cb, 525 .owner = THIS_MODULE, 526 .regulators_node = of_match_ptr("regulators"), 527 .of_map_mode = da9121_map_mode, 528 .ops = &da9121_buck_ops, 529 .type = REGULATOR_VOLTAGE, 530 .n_voltages = DA9121_N_VOLTAGES, 531 .min_uV = DA9121_MIN_MV * 1000, 532 .uV_step = DA9121_STEP_MV * 1000, 533 .linear_min_sel = DA9121_MIN_SEL, 534 .enable_reg = DA9121_REG_BUCK_BUCK1_0, 535 .enable_mask = DA9121_MASK_BUCK_BUCKx_0_CHx_EN, 536 .vsel_reg = DA9121_REG_BUCK_BUCK1_5, 537 .vsel_mask = DA9121_MASK_BUCK_BUCKx_5_CHx_A_VOUT, 538 }; 539 540 static const struct regulator_desc *local_da9121_regulators[][DA9121_IDX_MAX] = { 541 [DA9121_TYPE_DA9121_DA9130] = { &da9121_reg, NULL }, 542 [DA9121_TYPE_DA9220_DA9132] = { &da9220_reg[0], &da9220_reg[1] }, 543 [DA9121_TYPE_DA9122_DA9131] = { &da9122_reg[0], &da9122_reg[1] }, 544 [DA9121_TYPE_DA9217] = { &da9217_reg, NULL }, 545 }; 546 547 static void da9121_status_poll_on(struct work_struct *work) 548 { 549 struct da9121 *chip = container_of(work, struct da9121, work.work); 550 int status[3] = {0}; 551 int clear[3] = {0}; 552 unsigned long delay; 553 int i; 554 int ret; 555 556 ret = regmap_bulk_read(chip->regmap, DA9121_REG_SYS_STATUS_0, status, 2); 557 if (ret < 0) { 558 dev_err(chip->dev, 559 "Failed to read STATUS registers: %d\n", ret); 560 goto error; 561 } 562 563 /* Possible events are tested to be within range for the variant, potentially 564 * masked by the IRQ handler (not just warned about), as having been masked, 565 * and the respective state cleared - then flagged to unmask for next IRQ. 566 */ 567 for (i = 0; i < ARRAY_SIZE(status_event_handling); i++) { 568 const struct status_event_data *item = &status_event_handling[i]; 569 int reg_idx = item->reg_index; 570 bool relevant = (item->buck_id <= variant_parameters[chip->variant_id].num_bucks); 571 bool supported = (item->warn == NULL); 572 bool persisting = (chip->persistent[reg_idx] & item->event_bit); 573 bool now_cleared = !(status[reg_idx] & item->status_bit); 574 575 if (relevant && supported && persisting && now_cleared) { 576 clear[reg_idx] |= item->mask_bit; 577 chip->persistent[reg_idx] &= ~item->event_bit; 578 } 579 } 580 581 for (i = 0; i < 2; i++) { 582 if (clear[i]) { 583 unsigned int reg = DA9121_REG_SYS_MASK_0 + i; 584 unsigned int mbit = clear[i]; 585 586 ret = regmap_update_bits(chip->regmap, reg, mbit, 0); 587 if (ret < 0) { 588 dev_err(chip->dev, 589 "Failed to unmask 0x%02x %d\n", 590 reg, ret); 591 goto error; 592 } 593 } 594 } 595 596 if (chip->persistent[0] | chip->persistent[1]) { 597 delay = msecs_to_jiffies(chip->passive_delay); 598 queue_delayed_work(system_freezable_wq, &chip->work, delay); 599 } 600 601 error: 602 return; 603 } 604 605 static irqreturn_t da9121_irq_handler(int irq, void *data) 606 { 607 struct da9121 *chip = data; 608 struct regulator_dev *rdev; 609 int event[3] = {0}; 610 int handled[3] = {0}; 611 int mask[3] = {0}; 612 int ret = IRQ_NONE; 613 int i; 614 int err; 615 616 err = regmap_bulk_read(chip->regmap, DA9121_REG_SYS_EVENT_0, event, 3); 617 if (err < 0) { 618 dev_err(chip->dev, "Failed to read EVENT registers %d\n", err); 619 ret = IRQ_NONE; 620 goto error; 621 } 622 623 err = regmap_bulk_read(chip->regmap, DA9121_REG_SYS_MASK_0, mask, 3); 624 if (err < 0) { 625 dev_err(chip->dev, 626 "Failed to read MASK registers: %d\n", ret); 627 ret = IRQ_NONE; 628 goto error; 629 } 630 631 rdev = chip->rdev[DA9121_IDX_BUCK1]; 632 633 /* Possible events are tested to be within range for the variant, currently 634 * enabled, and having triggered this IRQ. The event may then be notified, 635 * or a warning given for unexpected events - those from device POR, and 636 * currently unsupported GPIO configurations. 637 */ 638 for (i = 0; i < ARRAY_SIZE(status_event_handling); i++) { 639 const struct status_event_data *item = &status_event_handling[i]; 640 int reg_idx = item->reg_index; 641 bool relevant = (item->buck_id <= variant_parameters[chip->variant_id].num_bucks); 642 bool enabled = !(mask[reg_idx] & item->mask_bit); 643 bool active = (event[reg_idx] & item->event_bit); 644 bool notify = (item->warn == NULL); 645 646 if (relevant && enabled && active) { 647 if (notify) { 648 chip->persistent[reg_idx] |= item->event_bit; 649 regulator_notifier_call_chain(rdev, item->notification, NULL); 650 } else { 651 dev_warn(chip->dev, item->warn); 652 handled[reg_idx] |= item->event_bit; 653 ret = IRQ_HANDLED; 654 } 655 } 656 } 657 658 for (i = 0; i < 3; i++) { 659 if (event[i] != handled[i]) { 660 dev_warn(chip->dev, 661 "Unhandled event(s) in bank%d 0x%02x\n", i, 662 event[i] ^ handled[i]); 663 } 664 } 665 666 /* Mask the interrupts for persistent events OV, OC, UV, WARN, CRIT */ 667 for (i = 0; i < 2; i++) { 668 if (handled[i]) { 669 unsigned int reg = DA9121_REG_SYS_MASK_0 + i; 670 unsigned int mbit = handled[i]; 671 672 err = regmap_update_bits(chip->regmap, reg, mbit, mbit); 673 if (err < 0) { 674 dev_err(chip->dev, 675 "Failed to mask 0x%02x interrupt %d\n", 676 reg, err); 677 ret = IRQ_NONE; 678 goto error; 679 } 680 } 681 } 682 683 /* clear the events */ 684 if (handled[0] | handled[1] | handled[2]) { 685 err = regmap_bulk_write(chip->regmap, DA9121_REG_SYS_EVENT_0, handled, 3); 686 if (err < 0) { 687 dev_err(chip->dev, "Fail to write EVENTs %d\n", err); 688 ret = IRQ_NONE; 689 goto error; 690 } 691 } 692 693 queue_delayed_work(system_freezable_wq, &chip->work, 0); 694 error: 695 return ret; 696 } 697 698 static int da9121_set_regulator_config(struct da9121 *chip) 699 { 700 struct regulator_config config = { }; 701 unsigned int max_matches = variant_parameters[chip->variant_id].num_bucks; 702 int ret = 0; 703 int i; 704 705 for (i = 0; i < max_matches; i++) { 706 const struct regulator_desc *regl_desc = 707 local_da9121_regulators[chip->variant_id][i]; 708 709 config.dev = chip->dev; 710 config.driver_data = chip; 711 config.regmap = chip->regmap; 712 713 chip->rdev[i] = devm_regulator_register(chip->dev, 714 regl_desc, &config); 715 if (IS_ERR(chip->rdev[i])) { 716 dev_err(chip->dev, "Failed to register regulator %s, %d/%d\n", 717 regl_desc->name, (i+1), max_matches); 718 ret = PTR_ERR(chip->rdev[i]); 719 goto error; 720 } 721 } 722 723 error: 724 return ret; 725 } 726 727 /* DA9121 chip register model */ 728 static const struct regmap_range da9121_1ch_readable_ranges[] = { 729 regmap_reg_range(DA9121_REG_SYS_STATUS_0, DA9121_REG_SYS_MASK_3), 730 regmap_reg_range(DA9121_REG_SYS_CONFIG_2, DA9121_REG_SYS_CONFIG_3), 731 regmap_reg_range(DA9121_REG_SYS_GPIO0_0, DA9121_REG_SYS_GPIO2_1), 732 regmap_reg_range(DA9121_REG_BUCK_BUCK1_0, DA9121_REG_BUCK_BUCK1_6), 733 regmap_reg_range(DA9121_REG_OTP_DEVICE_ID, DA9121_REG_OTP_CONFIG_ID), 734 }; 735 736 static const struct regmap_access_table da9121_1ch_readable_table = { 737 .yes_ranges = da9121_1ch_readable_ranges, 738 .n_yes_ranges = ARRAY_SIZE(da9121_1ch_readable_ranges), 739 }; 740 741 static const struct regmap_range da9121_2ch_readable_ranges[] = { 742 regmap_reg_range(DA9121_REG_SYS_STATUS_0, DA9121_REG_SYS_MASK_3), 743 regmap_reg_range(DA9121_REG_SYS_CONFIG_2, DA9121_REG_SYS_CONFIG_3), 744 regmap_reg_range(DA9121_REG_SYS_GPIO0_0, DA9121_REG_SYS_GPIO2_1), 745 regmap_reg_range(DA9121_REG_BUCK_BUCK1_0, DA9121_REG_BUCK_BUCK1_7), 746 regmap_reg_range(DA9xxx_REG_BUCK_BUCK2_0, DA9xxx_REG_BUCK_BUCK2_7), 747 regmap_reg_range(DA9121_REG_OTP_DEVICE_ID, DA9121_REG_OTP_CONFIG_ID), 748 }; 749 750 static const struct regmap_access_table da9121_2ch_readable_table = { 751 .yes_ranges = da9121_2ch_readable_ranges, 752 .n_yes_ranges = ARRAY_SIZE(da9121_2ch_readable_ranges), 753 }; 754 755 static const struct regmap_range da9121_1ch_writeable_ranges[] = { 756 regmap_reg_range(DA9121_REG_SYS_EVENT_0, DA9121_REG_SYS_MASK_3), 757 regmap_reg_range(DA9121_REG_SYS_CONFIG_2, DA9121_REG_SYS_CONFIG_3), 758 regmap_reg_range(DA9121_REG_SYS_GPIO0_0, DA9121_REG_SYS_GPIO2_1), 759 regmap_reg_range(DA9121_REG_BUCK_BUCK1_0, DA9121_REG_BUCK_BUCK1_2), 760 regmap_reg_range(DA9121_REG_BUCK_BUCK1_4, DA9121_REG_BUCK_BUCK1_6), 761 }; 762 763 static const struct regmap_access_table da9121_1ch_writeable_table = { 764 .yes_ranges = da9121_1ch_writeable_ranges, 765 .n_yes_ranges = ARRAY_SIZE(da9121_1ch_writeable_ranges), 766 }; 767 768 static const struct regmap_range da9121_2ch_writeable_ranges[] = { 769 regmap_reg_range(DA9121_REG_SYS_EVENT_0, DA9121_REG_SYS_MASK_3), 770 regmap_reg_range(DA9121_REG_SYS_CONFIG_2, DA9121_REG_SYS_CONFIG_3), 771 regmap_reg_range(DA9121_REG_SYS_GPIO0_0, DA9121_REG_SYS_GPIO2_1), 772 regmap_reg_range(DA9121_REG_BUCK_BUCK1_0, DA9121_REG_BUCK_BUCK1_2), 773 regmap_reg_range(DA9121_REG_BUCK_BUCK1_4, DA9121_REG_BUCK_BUCK1_7), 774 regmap_reg_range(DA9xxx_REG_BUCK_BUCK2_0, DA9xxx_REG_BUCK_BUCK2_2), 775 regmap_reg_range(DA9xxx_REG_BUCK_BUCK2_4, DA9xxx_REG_BUCK_BUCK2_7), 776 }; 777 778 static const struct regmap_access_table da9121_2ch_writeable_table = { 779 .yes_ranges = da9121_2ch_writeable_ranges, 780 .n_yes_ranges = ARRAY_SIZE(da9121_2ch_writeable_ranges), 781 }; 782 783 784 static const struct regmap_range da9121_volatile_ranges[] = { 785 regmap_reg_range(DA9121_REG_SYS_STATUS_0, DA9121_REG_SYS_EVENT_2), 786 regmap_reg_range(DA9121_REG_SYS_GPIO0_0, DA9121_REG_SYS_GPIO2_1), 787 regmap_reg_range(DA9121_REG_BUCK_BUCK1_0, DA9121_REG_BUCK_BUCK1_6), 788 }; 789 790 static const struct regmap_access_table da9121_volatile_table = { 791 .yes_ranges = da9121_volatile_ranges, 792 .n_yes_ranges = ARRAY_SIZE(da9121_volatile_ranges), 793 }; 794 795 /* DA9121 regmap config for 1 channel variants */ 796 static struct regmap_config da9121_1ch_regmap_config = { 797 .reg_bits = 8, 798 .val_bits = 8, 799 .max_register = DA9121_REG_OTP_CONFIG_ID, 800 .rd_table = &da9121_1ch_readable_table, 801 .wr_table = &da9121_1ch_writeable_table, 802 .volatile_table = &da9121_volatile_table, 803 .cache_type = REGCACHE_RBTREE, 804 }; 805 806 /* DA9121 regmap config for 2 channel variants */ 807 static struct regmap_config da9121_2ch_regmap_config = { 808 .reg_bits = 8, 809 .val_bits = 8, 810 .max_register = DA9121_REG_OTP_CONFIG_ID, 811 .rd_table = &da9121_2ch_readable_table, 812 .wr_table = &da9121_2ch_writeable_table, 813 .volatile_table = &da9121_volatile_table, 814 .cache_type = REGCACHE_RBTREE, 815 }; 816 817 static int da9121_check_device_type(struct i2c_client *i2c, struct da9121 *chip) 818 { 819 u32 device_id; 820 u32 variant_id; 821 u8 variant_mrc, variant_vrc; 822 char *type; 823 bool config_match = false; 824 int ret = 0; 825 826 ret = regmap_read(chip->regmap, DA9121_REG_OTP_DEVICE_ID, &device_id); 827 if (ret < 0) { 828 dev_err(chip->dev, "Cannot read device ID: %d\n", ret); 829 goto error; 830 } 831 832 ret = regmap_read(chip->regmap, DA9121_REG_OTP_VARIANT_ID, &variant_id); 833 if (ret < 0) { 834 dev_err(chip->dev, "Cannot read variant ID: %d\n", ret); 835 goto error; 836 } 837 838 if (device_id != DA9121_DEVICE_ID) { 839 dev_err(chip->dev, "Invalid device ID: 0x%02x\n", device_id); 840 ret = -ENODEV; 841 goto error; 842 } 843 844 variant_vrc = variant_id & DA9121_MASK_OTP_VARIANT_ID_VRC; 845 846 switch (chip->subvariant_id) { 847 case DA9121_SUBTYPE_DA9121: 848 type = "DA9121"; 849 config_match = (variant_vrc == DA9121_VARIANT_VRC); 850 break; 851 case DA9121_SUBTYPE_DA9130: 852 type = "DA9130"; 853 config_match = (variant_vrc == DA9130_VARIANT_VRC); 854 break; 855 case DA9121_SUBTYPE_DA9220: 856 type = "DA9220"; 857 config_match = (variant_vrc == DA9220_VARIANT_VRC); 858 break; 859 case DA9121_SUBTYPE_DA9132: 860 type = "DA9132"; 861 config_match = (variant_vrc == DA9132_VARIANT_VRC); 862 break; 863 case DA9121_SUBTYPE_DA9122: 864 type = "DA9122"; 865 config_match = (variant_vrc == DA9122_VARIANT_VRC); 866 break; 867 case DA9121_SUBTYPE_DA9131: 868 type = "DA9131"; 869 config_match = (variant_vrc == DA9131_VARIANT_VRC); 870 break; 871 case DA9121_SUBTYPE_DA9217: 872 type = "DA9217"; 873 config_match = (variant_vrc == DA9217_VARIANT_VRC); 874 break; 875 default: 876 type = "Unknown"; 877 break; 878 } 879 880 dev_info(chip->dev, 881 "Device detected (device-ID: 0x%02X, var-ID: 0x%02X, %s)\n", 882 device_id, variant_id, type); 883 884 if (!config_match) { 885 dev_err(chip->dev, "Device tree configuration does not match detected device.\n"); 886 ret = -EINVAL; 887 goto error; 888 } 889 890 variant_mrc = (variant_id & DA9121_MASK_OTP_VARIANT_ID_MRC) 891 >> DA9121_SHIFT_OTP_VARIANT_ID_MRC; 892 893 if ((device_id == DA9121_DEVICE_ID) && 894 (variant_mrc < DA9121_VARIANT_MRC_BASE)) { 895 dev_err(chip->dev, 896 "Cannot support variant MRC: 0x%02X\n", variant_mrc); 897 ret = -EINVAL; 898 } 899 error: 900 return ret; 901 } 902 903 static int da9121_assign_chip_model(struct i2c_client *i2c, 904 struct da9121 *chip) 905 { 906 struct regmap_config *regmap; 907 int ret = 0; 908 909 chip->dev = &i2c->dev; 910 911 /* Use configured subtype to select the regulator descriptor index and 912 * register map, common to both consumer and automotive grade variants 913 */ 914 switch (chip->subvariant_id) { 915 case DA9121_SUBTYPE_DA9121: 916 case DA9121_SUBTYPE_DA9130: 917 chip->variant_id = DA9121_TYPE_DA9121_DA9130; 918 regmap = &da9121_1ch_regmap_config; 919 break; 920 case DA9121_SUBTYPE_DA9217: 921 chip->variant_id = DA9121_TYPE_DA9217; 922 regmap = &da9121_1ch_regmap_config; 923 break; 924 case DA9121_SUBTYPE_DA9122: 925 case DA9121_SUBTYPE_DA9131: 926 chip->variant_id = DA9121_TYPE_DA9122_DA9131; 927 regmap = &da9121_2ch_regmap_config; 928 break; 929 case DA9121_SUBTYPE_DA9220: 930 case DA9121_SUBTYPE_DA9132: 931 chip->variant_id = DA9121_TYPE_DA9220_DA9132; 932 regmap = &da9121_2ch_regmap_config; 933 break; 934 } 935 936 /* Set these up for of_regulator_match call which may want .of_map_modes */ 937 da9121_matches[0].desc = local_da9121_regulators[chip->variant_id][0]; 938 da9121_matches[1].desc = local_da9121_regulators[chip->variant_id][1]; 939 940 chip->regmap = devm_regmap_init_i2c(i2c, regmap); 941 if (IS_ERR(chip->regmap)) { 942 ret = PTR_ERR(chip->regmap); 943 dev_err(chip->dev, "Failed to configure a register map: %d\n", 944 ret); 945 return ret; 946 } 947 948 ret = da9121_check_device_type(i2c, chip); 949 950 return ret; 951 } 952 953 static int da9121_config_irq(struct i2c_client *i2c, 954 struct da9121 *chip) 955 { 956 unsigned int p_delay = DA9121_DEFAULT_POLLING_PERIOD_MS; 957 const int mask_all[4] = { 0, 0, 0xFF, 0xFF }; 958 int ret = 0; 959 960 chip->chip_irq = i2c->irq; 961 962 if (chip->chip_irq != 0) { 963 if (!of_property_read_u32(chip->dev->of_node, 964 "dlg,irq-polling-delay-passive-ms", 965 &p_delay)) { 966 if (p_delay < DA9121_MIN_POLLING_PERIOD_MS || 967 p_delay > DA9121_MAX_POLLING_PERIOD_MS) { 968 dev_warn(chip->dev, 969 "Out-of-range polling period %d ms\n", 970 p_delay); 971 p_delay = DA9121_DEFAULT_POLLING_PERIOD_MS; 972 } 973 } 974 975 chip->passive_delay = p_delay; 976 977 ret = request_threaded_irq(chip->chip_irq, NULL, 978 da9121_irq_handler, 979 IRQF_TRIGGER_LOW|IRQF_ONESHOT, 980 "da9121", chip); 981 if (ret != 0) { 982 dev_err(chip->dev, "Failed IRQ request: %d\n", 983 chip->chip_irq); 984 goto error; 985 } 986 987 ret = regmap_bulk_write(chip->regmap, DA9121_REG_SYS_MASK_0, mask_all, 4); 988 if (ret != 0) { 989 dev_err(chip->dev, "Failed to set IRQ masks: %d\n", 990 ret); 991 goto regmap_error; 992 } 993 994 INIT_DELAYED_WORK(&chip->work, da9121_status_poll_on); 995 dev_info(chip->dev, "Interrupt polling period set at %d ms\n", 996 chip->passive_delay); 997 } 998 error: 999 return ret; 1000 regmap_error: 1001 free_irq(chip->chip_irq, chip); 1002 return ret; 1003 } 1004 1005 static const struct of_device_id da9121_dt_ids[] = { 1006 { .compatible = "dlg,da9121", .data = (void *) DA9121_SUBTYPE_DA9121 }, 1007 { .compatible = "dlg,da9130", .data = (void *) DA9121_SUBTYPE_DA9130 }, 1008 { .compatible = "dlg,da9217", .data = (void *) DA9121_SUBTYPE_DA9217 }, 1009 { .compatible = "dlg,da9122", .data = (void *) DA9121_SUBTYPE_DA9122 }, 1010 { .compatible = "dlg,da9131", .data = (void *) DA9121_SUBTYPE_DA9131 }, 1011 { .compatible = "dlg,da9220", .data = (void *) DA9121_SUBTYPE_DA9220 }, 1012 { .compatible = "dlg,da9132", .data = (void *) DA9121_SUBTYPE_DA9132 }, 1013 { } 1014 }; 1015 MODULE_DEVICE_TABLE(of, da9121_dt_ids); 1016 1017 static inline int da9121_of_get_id(struct device *dev) 1018 { 1019 const struct of_device_id *id = of_match_device(da9121_dt_ids, dev); 1020 1021 if (!id) { 1022 dev_err(dev, "%s: Failed\n", __func__); 1023 return -EINVAL; 1024 } 1025 return (uintptr_t)id->data; 1026 } 1027 1028 static int da9121_i2c_probe(struct i2c_client *i2c, 1029 const struct i2c_device_id *id) 1030 { 1031 struct da9121 *chip; 1032 const int mask_all[4] = { 0xFF, 0xFF, 0xFF, 0xFF }; 1033 int ret = 0; 1034 1035 chip = devm_kzalloc(&i2c->dev, sizeof(struct da9121), GFP_KERNEL); 1036 if (!chip) { 1037 ret = -ENOMEM; 1038 goto error; 1039 } 1040 1041 chip->pdata = i2c->dev.platform_data; 1042 chip->subvariant_id = da9121_of_get_id(&i2c->dev); 1043 1044 ret = da9121_assign_chip_model(i2c, chip); 1045 if (ret < 0) 1046 goto error; 1047 1048 ret = regmap_bulk_write(chip->regmap, DA9121_REG_SYS_MASK_0, mask_all, 4); 1049 if (ret != 0) { 1050 dev_err(chip->dev, "Failed to set IRQ masks: %d\n", ret); 1051 goto error; 1052 } 1053 1054 ret = da9121_set_regulator_config(chip); 1055 if (ret < 0) 1056 goto error; 1057 1058 ret = da9121_config_irq(i2c, chip); 1059 1060 error: 1061 return ret; 1062 } 1063 1064 static int da9121_i2c_remove(struct i2c_client *i2c) 1065 { 1066 struct da9121 *chip = i2c_get_clientdata(i2c); 1067 const int mask_all[4] = { 0xFF, 0xFF, 0xFF, 0xFF }; 1068 int ret = 0; 1069 1070 free_irq(chip->chip_irq, chip); 1071 cancel_delayed_work_sync(&chip->work); 1072 1073 ret = regmap_bulk_write(chip->regmap, DA9121_REG_SYS_MASK_0, mask_all, 4); 1074 if (ret != 0) 1075 dev_err(chip->dev, "Failed to set IRQ masks: %d\n", ret); 1076 return ret; 1077 } 1078 1079 static const struct i2c_device_id da9121_i2c_id[] = { 1080 {"da9121", DA9121_TYPE_DA9121_DA9130}, 1081 {"da9130", DA9121_TYPE_DA9121_DA9130}, 1082 {"da9217", DA9121_TYPE_DA9217}, 1083 {"da9122", DA9121_TYPE_DA9122_DA9131}, 1084 {"da9131", DA9121_TYPE_DA9122_DA9131}, 1085 {"da9220", DA9121_TYPE_DA9220_DA9132}, 1086 {"da9132", DA9121_TYPE_DA9220_DA9132}, 1087 {}, 1088 }; 1089 MODULE_DEVICE_TABLE(i2c, da9121_i2c_id); 1090 1091 static struct i2c_driver da9121_regulator_driver = { 1092 .driver = { 1093 .name = "da9121", 1094 .of_match_table = of_match_ptr(da9121_dt_ids), 1095 }, 1096 .probe = da9121_i2c_probe, 1097 .remove = da9121_i2c_remove, 1098 .id_table = da9121_i2c_id, 1099 }; 1100 1101 module_i2c_driver(da9121_regulator_driver); 1102 1103 MODULE_LICENSE("GPL v2"); 1104