1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * Summit Microelectronics SMB347 Battery Charger Driver 4 * 5 * Copyright (C) 2011, Intel Corporation 6 * 7 * Authors: Bruce E. Robertson <bruce.e.robertson@intel.com> 8 * Mika Westerberg <mika.westerberg@linux.intel.com> 9 */ 10 11 #include <linux/delay.h> 12 #include <linux/err.h> 13 #include <linux/gpio.h> 14 #include <linux/kernel.h> 15 #include <linux/module.h> 16 #include <linux/init.h> 17 #include <linux/interrupt.h> 18 #include <linux/i2c.h> 19 #include <linux/power_supply.h> 20 #include <linux/property.h> 21 #include <linux/regmap.h> 22 23 #include <dt-bindings/power/summit,smb347-charger.h> 24 25 /* Use the default compensation method */ 26 #define SMB3XX_SOFT_TEMP_COMPENSATE_DEFAULT -1 27 28 /* Use default factory programmed value for hard/soft temperature limit */ 29 #define SMB3XX_TEMP_USE_DEFAULT -273 30 31 /* 32 * Configuration registers. These are mirrored to volatile RAM and can be 33 * written once %CMD_A_ALLOW_WRITE is set in %CMD_A register. They will be 34 * reloaded from non-volatile registers after POR. 35 */ 36 #define CFG_CHARGE_CURRENT 0x00 37 #define CFG_CHARGE_CURRENT_FCC_MASK 0xe0 38 #define CFG_CHARGE_CURRENT_FCC_SHIFT 5 39 #define CFG_CHARGE_CURRENT_PCC_MASK 0x18 40 #define CFG_CHARGE_CURRENT_PCC_SHIFT 3 41 #define CFG_CHARGE_CURRENT_TC_MASK 0x07 42 #define CFG_CURRENT_LIMIT 0x01 43 #define CFG_CURRENT_LIMIT_DC_MASK 0xf0 44 #define CFG_CURRENT_LIMIT_DC_SHIFT 4 45 #define CFG_CURRENT_LIMIT_USB_MASK 0x0f 46 #define CFG_FLOAT_VOLTAGE 0x03 47 #define CFG_FLOAT_VOLTAGE_FLOAT_MASK 0x3f 48 #define CFG_FLOAT_VOLTAGE_THRESHOLD_MASK 0xc0 49 #define CFG_FLOAT_VOLTAGE_THRESHOLD_SHIFT 6 50 #define CFG_STAT 0x05 51 #define CFG_STAT_DISABLED BIT(5) 52 #define CFG_STAT_ACTIVE_HIGH BIT(7) 53 #define CFG_PIN 0x06 54 #define CFG_PIN_EN_CTRL_MASK 0x60 55 #define CFG_PIN_EN_CTRL_ACTIVE_HIGH 0x40 56 #define CFG_PIN_EN_CTRL_ACTIVE_LOW 0x60 57 #define CFG_PIN_EN_APSD_IRQ BIT(1) 58 #define CFG_PIN_EN_CHARGER_ERROR BIT(2) 59 #define CFG_THERM 0x07 60 #define CFG_THERM_SOFT_HOT_COMPENSATION_MASK 0x03 61 #define CFG_THERM_SOFT_HOT_COMPENSATION_SHIFT 0 62 #define CFG_THERM_SOFT_COLD_COMPENSATION_MASK 0x0c 63 #define CFG_THERM_SOFT_COLD_COMPENSATION_SHIFT 2 64 #define CFG_THERM_MONITOR_DISABLED BIT(4) 65 #define CFG_SYSOK 0x08 66 #define CFG_SYSOK_SUSPEND_HARD_LIMIT_DISABLED BIT(2) 67 #define CFG_OTHER 0x09 68 #define CFG_OTHER_RID_MASK 0xc0 69 #define CFG_OTHER_RID_ENABLED_AUTO_OTG 0xc0 70 #define CFG_OTG 0x0a 71 #define CFG_OTG_TEMP_THRESHOLD_MASK 0x30 72 #define CFG_OTG_TEMP_THRESHOLD_SHIFT 4 73 #define CFG_OTG_CC_COMPENSATION_MASK 0xc0 74 #define CFG_OTG_CC_COMPENSATION_SHIFT 6 75 #define CFG_TEMP_LIMIT 0x0b 76 #define CFG_TEMP_LIMIT_SOFT_HOT_MASK 0x03 77 #define CFG_TEMP_LIMIT_SOFT_HOT_SHIFT 0 78 #define CFG_TEMP_LIMIT_SOFT_COLD_MASK 0x0c 79 #define CFG_TEMP_LIMIT_SOFT_COLD_SHIFT 2 80 #define CFG_TEMP_LIMIT_HARD_HOT_MASK 0x30 81 #define CFG_TEMP_LIMIT_HARD_HOT_SHIFT 4 82 #define CFG_TEMP_LIMIT_HARD_COLD_MASK 0xc0 83 #define CFG_TEMP_LIMIT_HARD_COLD_SHIFT 6 84 #define CFG_FAULT_IRQ 0x0c 85 #define CFG_FAULT_IRQ_DCIN_UV BIT(2) 86 #define CFG_STATUS_IRQ 0x0d 87 #define CFG_STATUS_IRQ_TERMINATION_OR_TAPER BIT(4) 88 #define CFG_STATUS_IRQ_CHARGE_TIMEOUT BIT(7) 89 #define CFG_ADDRESS 0x0e 90 91 /* Command registers */ 92 #define CMD_A 0x30 93 #define CMD_A_CHG_ENABLED BIT(1) 94 #define CMD_A_SUSPEND_ENABLED BIT(2) 95 #define CMD_A_ALLOW_WRITE BIT(7) 96 #define CMD_B 0x31 97 #define CMD_C 0x33 98 99 /* Interrupt Status registers */ 100 #define IRQSTAT_A 0x35 101 #define IRQSTAT_C 0x37 102 #define IRQSTAT_C_TERMINATION_STAT BIT(0) 103 #define IRQSTAT_C_TERMINATION_IRQ BIT(1) 104 #define IRQSTAT_C_TAPER_IRQ BIT(3) 105 #define IRQSTAT_D 0x38 106 #define IRQSTAT_D_CHARGE_TIMEOUT_STAT BIT(2) 107 #define IRQSTAT_D_CHARGE_TIMEOUT_IRQ BIT(3) 108 #define IRQSTAT_E 0x39 109 #define IRQSTAT_E_USBIN_UV_STAT BIT(0) 110 #define IRQSTAT_E_USBIN_UV_IRQ BIT(1) 111 #define IRQSTAT_E_DCIN_UV_STAT BIT(4) 112 #define IRQSTAT_E_DCIN_UV_IRQ BIT(5) 113 #define IRQSTAT_F 0x3a 114 115 /* Status registers */ 116 #define STAT_A 0x3b 117 #define STAT_A_FLOAT_VOLTAGE_MASK 0x3f 118 #define STAT_B 0x3c 119 #define STAT_C 0x3d 120 #define STAT_C_CHG_ENABLED BIT(0) 121 #define STAT_C_HOLDOFF_STAT BIT(3) 122 #define STAT_C_CHG_MASK 0x06 123 #define STAT_C_CHG_SHIFT 1 124 #define STAT_C_CHG_TERM BIT(5) 125 #define STAT_C_CHARGER_ERROR BIT(6) 126 #define STAT_E 0x3f 127 128 #define SMB347_MAX_REGISTER 0x3f 129 130 /** 131 * struct smb347_charger - smb347 charger instance 132 * @dev: pointer to device 133 * @regmap: pointer to driver regmap 134 * @mains: power_supply instance for AC/DC power 135 * @usb: power_supply instance for USB power 136 * @id: SMB charger ID 137 * @mains_online: is AC/DC input connected 138 * @usb_online: is USB input connected 139 * @charging_enabled: is charging enabled 140 * @irq_unsupported: is interrupt unsupported by SMB hardware 141 * @max_charge_current: maximum current (in uA) the battery can be charged 142 * @max_charge_voltage: maximum voltage (in uV) the battery can be charged 143 * @pre_charge_current: current (in uA) to use in pre-charging phase 144 * @termination_current: current (in uA) used to determine when the 145 * charging cycle terminates 146 * @pre_to_fast_voltage: voltage (in uV) treshold used for transitioning to 147 * pre-charge to fast charge mode 148 * @mains_current_limit: maximum input current drawn from AC/DC input (in uA) 149 * @usb_hc_current_limit: maximum input high current (in uA) drawn from USB 150 * input 151 * @chip_temp_threshold: die temperature where device starts limiting charge 152 * current [%100 - %130] (in degree C) 153 * @soft_cold_temp_limit: soft cold temperature limit [%0 - %15] (in degree C), 154 * granularity is 5 deg C. 155 * @soft_hot_temp_limit: soft hot temperature limit [%40 - %55] (in degree C), 156 * granularity is 5 deg C. 157 * @hard_cold_temp_limit: hard cold temperature limit [%-5 - %10] (in degree C), 158 * granularity is 5 deg C. 159 * @hard_hot_temp_limit: hard hot temperature limit [%50 - %65] (in degree C), 160 * granularity is 5 deg C. 161 * @suspend_on_hard_temp_limit: suspend charging when hard limit is hit 162 * @soft_temp_limit_compensation: compensation method when soft temperature 163 * limit is hit 164 * @charge_current_compensation: current (in uA) for charging compensation 165 * current when temperature hits soft limits 166 * @use_mains: AC/DC input can be used 167 * @use_usb: USB input can be used 168 * @use_usb_otg: USB OTG output can be used (not implemented yet) 169 * @enable_control: how charging enable/disable is controlled 170 * (driver/pin controls) 171 * 172 * @use_main, @use_usb, and @use_usb_otg are means to enable/disable 173 * hardware support for these. This is useful when we want to have for 174 * example OTG charging controlled via OTG transceiver driver and not by 175 * the SMB347 hardware. 176 * 177 * Hard and soft temperature limit values are given as described in the 178 * device data sheet and assuming NTC beta value is %3750. Even if this is 179 * not the case, these values should be used. They can be mapped to the 180 * corresponding NTC beta values with the help of table %2 in the data 181 * sheet. So for example if NTC beta is %3375 and we want to program hard 182 * hot limit to be %53 deg C, @hard_hot_temp_limit should be set to %50. 183 * 184 * If zero value is given in any of the current and voltage values, the 185 * factory programmed default will be used. For soft/hard temperature 186 * values, pass in %SMB3XX_TEMP_USE_DEFAULT instead. 187 */ 188 struct smb347_charger { 189 struct device *dev; 190 struct regmap *regmap; 191 struct power_supply *mains; 192 struct power_supply *usb; 193 unsigned int id; 194 bool mains_online; 195 bool usb_online; 196 bool charging_enabled; 197 bool irq_unsupported; 198 199 unsigned int max_charge_current; 200 unsigned int max_charge_voltage; 201 unsigned int pre_charge_current; 202 unsigned int termination_current; 203 unsigned int pre_to_fast_voltage; 204 unsigned int mains_current_limit; 205 unsigned int usb_hc_current_limit; 206 unsigned int chip_temp_threshold; 207 int soft_cold_temp_limit; 208 int soft_hot_temp_limit; 209 int hard_cold_temp_limit; 210 int hard_hot_temp_limit; 211 bool suspend_on_hard_temp_limit; 212 unsigned int soft_temp_limit_compensation; 213 unsigned int charge_current_compensation; 214 bool use_mains; 215 bool use_usb; 216 bool use_usb_otg; 217 unsigned int enable_control; 218 }; 219 220 enum smb_charger_chipid { 221 SMB345, 222 SMB347, 223 SMB358, 224 NUM_CHIP_TYPES, 225 }; 226 227 /* Fast charge current in uA */ 228 static const unsigned int fcc_tbl[NUM_CHIP_TYPES][8] = { 229 [SMB345] = { 200000, 450000, 600000, 900000, 230 1300000, 1500000, 1800000, 2000000 }, 231 [SMB347] = { 700000, 900000, 1200000, 1500000, 232 1800000, 2000000, 2200000, 2500000 }, 233 [SMB358] = { 200000, 450000, 600000, 900000, 234 1300000, 1500000, 1800000, 2000000 }, 235 }; 236 /* Pre-charge current in uA */ 237 static const unsigned int pcc_tbl[NUM_CHIP_TYPES][4] = { 238 [SMB345] = { 150000, 250000, 350000, 450000 }, 239 [SMB347] = { 100000, 150000, 200000, 250000 }, 240 [SMB358] = { 150000, 250000, 350000, 450000 }, 241 }; 242 243 /* Termination current in uA */ 244 static const unsigned int tc_tbl[NUM_CHIP_TYPES][8] = { 245 [SMB345] = { 30000, 40000, 60000, 80000, 246 100000, 125000, 150000, 200000 }, 247 [SMB347] = { 37500, 50000, 100000, 150000, 248 200000, 250000, 500000, 600000 }, 249 [SMB358] = { 30000, 40000, 60000, 80000, 250 100000, 125000, 150000, 200000 }, 251 }; 252 253 /* Input current limit in uA */ 254 static const unsigned int icl_tbl[NUM_CHIP_TYPES][10] = { 255 [SMB345] = { 300000, 500000, 700000, 1000000, 1500000, 256 1800000, 2000000, 2000000, 2000000, 2000000 }, 257 [SMB347] = { 300000, 500000, 700000, 900000, 1200000, 258 1500000, 1800000, 2000000, 2200000, 2500000 }, 259 [SMB358] = { 300000, 500000, 700000, 1000000, 1500000, 260 1800000, 2000000, 2000000, 2000000, 2000000 }, 261 }; 262 263 /* Charge current compensation in uA */ 264 static const unsigned int ccc_tbl[NUM_CHIP_TYPES][4] = { 265 [SMB345] = { 200000, 450000, 600000, 900000 }, 266 [SMB347] = { 250000, 700000, 900000, 1200000 }, 267 [SMB358] = { 200000, 450000, 600000, 900000 }, 268 }; 269 270 /* Convert register value to current using lookup table */ 271 static int hw_to_current(const unsigned int *tbl, size_t size, unsigned int val) 272 { 273 if (val >= size) 274 return -EINVAL; 275 return tbl[val]; 276 } 277 278 /* Convert current to register value using lookup table */ 279 static int current_to_hw(const unsigned int *tbl, size_t size, unsigned int val) 280 { 281 size_t i; 282 283 for (i = 0; i < size; i++) 284 if (val < tbl[i]) 285 break; 286 return i > 0 ? i - 1 : -EINVAL; 287 } 288 289 /** 290 * smb347_update_ps_status - refreshes the power source status 291 * @smb: pointer to smb347 charger instance 292 * 293 * Function checks whether any power source is connected to the charger and 294 * updates internal state accordingly. If there is a change to previous state 295 * function returns %1, otherwise %0 and negative errno in case of errror. 296 */ 297 static int smb347_update_ps_status(struct smb347_charger *smb) 298 { 299 bool usb = false; 300 bool dc = false; 301 unsigned int val; 302 int ret; 303 304 ret = regmap_read(smb->regmap, IRQSTAT_E, &val); 305 if (ret < 0) 306 return ret; 307 308 /* 309 * Dc and usb are set depending on whether they are enabled in 310 * platform data _and_ whether corresponding undervoltage is set. 311 */ 312 if (smb->use_mains) 313 dc = !(val & IRQSTAT_E_DCIN_UV_STAT); 314 if (smb->use_usb) 315 usb = !(val & IRQSTAT_E_USBIN_UV_STAT); 316 317 ret = smb->mains_online != dc || smb->usb_online != usb; 318 smb->mains_online = dc; 319 smb->usb_online = usb; 320 321 return ret; 322 } 323 324 /* 325 * smb347_is_ps_online - returns whether input power source is connected 326 * @smb: pointer to smb347 charger instance 327 * 328 * Returns %true if input power source is connected. Note that this is 329 * dependent on what platform has configured for usable power sources. For 330 * example if USB is disabled, this will return %false even if the USB cable 331 * is connected. 332 */ 333 static bool smb347_is_ps_online(struct smb347_charger *smb) 334 { 335 return smb->usb_online || smb->mains_online; 336 } 337 338 /** 339 * smb347_charging_status - returns status of charging 340 * @smb: pointer to smb347 charger instance 341 * 342 * Function returns charging status. %0 means no charging is in progress, 343 * %1 means pre-charging, %2 fast-charging and %3 taper-charging. 344 */ 345 static int smb347_charging_status(struct smb347_charger *smb) 346 { 347 unsigned int val; 348 int ret; 349 350 if (!smb347_is_ps_online(smb)) 351 return 0; 352 353 ret = regmap_read(smb->regmap, STAT_C, &val); 354 if (ret < 0) 355 return 0; 356 357 return (val & STAT_C_CHG_MASK) >> STAT_C_CHG_SHIFT; 358 } 359 360 static int smb347_charging_set(struct smb347_charger *smb, bool enable) 361 { 362 int ret = 0; 363 364 if (smb->enable_control != SMB3XX_CHG_ENABLE_SW) { 365 dev_dbg(smb->dev, "charging enable/disable in SW disabled\n"); 366 return 0; 367 } 368 369 if (smb->charging_enabled != enable) { 370 ret = regmap_update_bits(smb->regmap, CMD_A, CMD_A_CHG_ENABLED, 371 enable ? CMD_A_CHG_ENABLED : 0); 372 if (!ret) 373 smb->charging_enabled = enable; 374 } 375 376 return ret; 377 } 378 379 static inline int smb347_charging_enable(struct smb347_charger *smb) 380 { 381 return smb347_charging_set(smb, true); 382 } 383 384 static inline int smb347_charging_disable(struct smb347_charger *smb) 385 { 386 return smb347_charging_set(smb, false); 387 } 388 389 static int smb347_start_stop_charging(struct smb347_charger *smb) 390 { 391 int ret; 392 393 /* 394 * Depending on whether valid power source is connected or not, we 395 * disable or enable the charging. We do it manually because it 396 * depends on how the platform has configured the valid inputs. 397 */ 398 if (smb347_is_ps_online(smb)) { 399 ret = smb347_charging_enable(smb); 400 if (ret < 0) 401 dev_err(smb->dev, "failed to enable charging\n"); 402 } else { 403 ret = smb347_charging_disable(smb); 404 if (ret < 0) 405 dev_err(smb->dev, "failed to disable charging\n"); 406 } 407 408 return ret; 409 } 410 411 static int smb347_set_charge_current(struct smb347_charger *smb) 412 { 413 unsigned int id = smb->id; 414 int ret; 415 416 if (smb->max_charge_current) { 417 ret = current_to_hw(fcc_tbl[id], ARRAY_SIZE(fcc_tbl[id]), 418 smb->max_charge_current); 419 if (ret < 0) 420 return ret; 421 422 ret = regmap_update_bits(smb->regmap, CFG_CHARGE_CURRENT, 423 CFG_CHARGE_CURRENT_FCC_MASK, 424 ret << CFG_CHARGE_CURRENT_FCC_SHIFT); 425 if (ret < 0) 426 return ret; 427 } 428 429 if (smb->pre_charge_current) { 430 ret = current_to_hw(pcc_tbl[id], ARRAY_SIZE(pcc_tbl[id]), 431 smb->pre_charge_current); 432 if (ret < 0) 433 return ret; 434 435 ret = regmap_update_bits(smb->regmap, CFG_CHARGE_CURRENT, 436 CFG_CHARGE_CURRENT_PCC_MASK, 437 ret << CFG_CHARGE_CURRENT_PCC_SHIFT); 438 if (ret < 0) 439 return ret; 440 } 441 442 if (smb->termination_current) { 443 ret = current_to_hw(tc_tbl[id], ARRAY_SIZE(tc_tbl[id]), 444 smb->termination_current); 445 if (ret < 0) 446 return ret; 447 448 ret = regmap_update_bits(smb->regmap, CFG_CHARGE_CURRENT, 449 CFG_CHARGE_CURRENT_TC_MASK, ret); 450 if (ret < 0) 451 return ret; 452 } 453 454 return 0; 455 } 456 457 static int smb347_set_current_limits(struct smb347_charger *smb) 458 { 459 unsigned int id = smb->id; 460 int ret; 461 462 if (smb->mains_current_limit) { 463 ret = current_to_hw(icl_tbl[id], ARRAY_SIZE(icl_tbl[id]), 464 smb->mains_current_limit); 465 if (ret < 0) 466 return ret; 467 468 ret = regmap_update_bits(smb->regmap, CFG_CURRENT_LIMIT, 469 CFG_CURRENT_LIMIT_DC_MASK, 470 ret << CFG_CURRENT_LIMIT_DC_SHIFT); 471 if (ret < 0) 472 return ret; 473 } 474 475 if (smb->usb_hc_current_limit) { 476 ret = current_to_hw(icl_tbl[id], ARRAY_SIZE(icl_tbl[id]), 477 smb->usb_hc_current_limit); 478 if (ret < 0) 479 return ret; 480 481 ret = regmap_update_bits(smb->regmap, CFG_CURRENT_LIMIT, 482 CFG_CURRENT_LIMIT_USB_MASK, ret); 483 if (ret < 0) 484 return ret; 485 } 486 487 return 0; 488 } 489 490 static int smb347_set_voltage_limits(struct smb347_charger *smb) 491 { 492 int ret; 493 494 if (smb->pre_to_fast_voltage) { 495 ret = smb->pre_to_fast_voltage; 496 497 /* uV */ 498 ret = clamp_val(ret, 2400000, 3000000) - 2400000; 499 ret /= 200000; 500 501 ret = regmap_update_bits(smb->regmap, CFG_FLOAT_VOLTAGE, 502 CFG_FLOAT_VOLTAGE_THRESHOLD_MASK, 503 ret << CFG_FLOAT_VOLTAGE_THRESHOLD_SHIFT); 504 if (ret < 0) 505 return ret; 506 } 507 508 if (smb->max_charge_voltage) { 509 ret = smb->max_charge_voltage; 510 511 /* uV */ 512 ret = clamp_val(ret, 3500000, 4500000) - 3500000; 513 ret /= 20000; 514 515 ret = regmap_update_bits(smb->regmap, CFG_FLOAT_VOLTAGE, 516 CFG_FLOAT_VOLTAGE_FLOAT_MASK, ret); 517 if (ret < 0) 518 return ret; 519 } 520 521 return 0; 522 } 523 524 static int smb347_set_temp_limits(struct smb347_charger *smb) 525 { 526 unsigned int id = smb->id; 527 bool enable_therm_monitor = false; 528 int ret = 0; 529 int val; 530 531 if (smb->chip_temp_threshold) { 532 val = smb->chip_temp_threshold; 533 534 /* degree C */ 535 val = clamp_val(val, 100, 130) - 100; 536 val /= 10; 537 538 ret = regmap_update_bits(smb->regmap, CFG_OTG, 539 CFG_OTG_TEMP_THRESHOLD_MASK, 540 val << CFG_OTG_TEMP_THRESHOLD_SHIFT); 541 if (ret < 0) 542 return ret; 543 } 544 545 if (smb->soft_cold_temp_limit != SMB3XX_TEMP_USE_DEFAULT) { 546 val = smb->soft_cold_temp_limit; 547 548 val = clamp_val(val, 0, 15); 549 val /= 5; 550 /* this goes from higher to lower so invert the value */ 551 val = ~val & 0x3; 552 553 ret = regmap_update_bits(smb->regmap, CFG_TEMP_LIMIT, 554 CFG_TEMP_LIMIT_SOFT_COLD_MASK, 555 val << CFG_TEMP_LIMIT_SOFT_COLD_SHIFT); 556 if (ret < 0) 557 return ret; 558 559 enable_therm_monitor = true; 560 } 561 562 if (smb->soft_hot_temp_limit != SMB3XX_TEMP_USE_DEFAULT) { 563 val = smb->soft_hot_temp_limit; 564 565 val = clamp_val(val, 40, 55) - 40; 566 val /= 5; 567 568 ret = regmap_update_bits(smb->regmap, CFG_TEMP_LIMIT, 569 CFG_TEMP_LIMIT_SOFT_HOT_MASK, 570 val << CFG_TEMP_LIMIT_SOFT_HOT_SHIFT); 571 if (ret < 0) 572 return ret; 573 574 enable_therm_monitor = true; 575 } 576 577 if (smb->hard_cold_temp_limit != SMB3XX_TEMP_USE_DEFAULT) { 578 val = smb->hard_cold_temp_limit; 579 580 val = clamp_val(val, -5, 10) + 5; 581 val /= 5; 582 /* this goes from higher to lower so invert the value */ 583 val = ~val & 0x3; 584 585 ret = regmap_update_bits(smb->regmap, CFG_TEMP_LIMIT, 586 CFG_TEMP_LIMIT_HARD_COLD_MASK, 587 val << CFG_TEMP_LIMIT_HARD_COLD_SHIFT); 588 if (ret < 0) 589 return ret; 590 591 enable_therm_monitor = true; 592 } 593 594 if (smb->hard_hot_temp_limit != SMB3XX_TEMP_USE_DEFAULT) { 595 val = smb->hard_hot_temp_limit; 596 597 val = clamp_val(val, 50, 65) - 50; 598 val /= 5; 599 600 ret = regmap_update_bits(smb->regmap, CFG_TEMP_LIMIT, 601 CFG_TEMP_LIMIT_HARD_HOT_MASK, 602 val << CFG_TEMP_LIMIT_HARD_HOT_SHIFT); 603 if (ret < 0) 604 return ret; 605 606 enable_therm_monitor = true; 607 } 608 609 /* 610 * If any of the temperature limits are set, we also enable the 611 * thermistor monitoring. 612 * 613 * When soft limits are hit, the device will start to compensate 614 * current and/or voltage depending on the configuration. 615 * 616 * When hard limit is hit, the device will suspend charging 617 * depending on the configuration. 618 */ 619 if (enable_therm_monitor) { 620 ret = regmap_update_bits(smb->regmap, CFG_THERM, 621 CFG_THERM_MONITOR_DISABLED, 0); 622 if (ret < 0) 623 return ret; 624 } 625 626 if (smb->suspend_on_hard_temp_limit) { 627 ret = regmap_update_bits(smb->regmap, CFG_SYSOK, 628 CFG_SYSOK_SUSPEND_HARD_LIMIT_DISABLED, 0); 629 if (ret < 0) 630 return ret; 631 } 632 633 if (smb->soft_temp_limit_compensation != 634 SMB3XX_SOFT_TEMP_COMPENSATE_DEFAULT) { 635 val = smb->soft_temp_limit_compensation & 0x3; 636 637 ret = regmap_update_bits(smb->regmap, CFG_THERM, 638 CFG_THERM_SOFT_HOT_COMPENSATION_MASK, 639 val << CFG_THERM_SOFT_HOT_COMPENSATION_SHIFT); 640 if (ret < 0) 641 return ret; 642 643 ret = regmap_update_bits(smb->regmap, CFG_THERM, 644 CFG_THERM_SOFT_COLD_COMPENSATION_MASK, 645 val << CFG_THERM_SOFT_COLD_COMPENSATION_SHIFT); 646 if (ret < 0) 647 return ret; 648 } 649 650 if (smb->charge_current_compensation) { 651 val = current_to_hw(ccc_tbl[id], ARRAY_SIZE(ccc_tbl[id]), 652 smb->charge_current_compensation); 653 if (val < 0) 654 return val; 655 656 ret = regmap_update_bits(smb->regmap, CFG_OTG, 657 CFG_OTG_CC_COMPENSATION_MASK, 658 (val & 0x3) << CFG_OTG_CC_COMPENSATION_SHIFT); 659 if (ret < 0) 660 return ret; 661 } 662 663 return ret; 664 } 665 666 /* 667 * smb347_set_writable - enables/disables writing to non-volatile registers 668 * @smb: pointer to smb347 charger instance 669 * 670 * You can enable/disable writing to the non-volatile configuration 671 * registers by calling this function. 672 * 673 * Returns %0 on success and negative errno in case of failure. 674 */ 675 static int smb347_set_writable(struct smb347_charger *smb, bool writable) 676 { 677 return regmap_update_bits(smb->regmap, CMD_A, CMD_A_ALLOW_WRITE, 678 writable ? CMD_A_ALLOW_WRITE : 0); 679 } 680 681 static int smb347_hw_init(struct smb347_charger *smb) 682 { 683 unsigned int val; 684 int ret; 685 686 ret = smb347_set_writable(smb, true); 687 if (ret < 0) 688 return ret; 689 690 /* 691 * Program the platform specific configuration values to the device 692 * first. 693 */ 694 ret = smb347_set_charge_current(smb); 695 if (ret < 0) 696 goto fail; 697 698 ret = smb347_set_current_limits(smb); 699 if (ret < 0) 700 goto fail; 701 702 ret = smb347_set_voltage_limits(smb); 703 if (ret < 0) 704 goto fail; 705 706 ret = smb347_set_temp_limits(smb); 707 if (ret < 0) 708 goto fail; 709 710 /* If USB charging is disabled we put the USB in suspend mode */ 711 if (!smb->use_usb) { 712 ret = regmap_update_bits(smb->regmap, CMD_A, 713 CMD_A_SUSPEND_ENABLED, 714 CMD_A_SUSPEND_ENABLED); 715 if (ret < 0) 716 goto fail; 717 } 718 719 /* 720 * If configured by platform data, we enable hardware Auto-OTG 721 * support for driving VBUS. Otherwise we disable it. 722 */ 723 ret = regmap_update_bits(smb->regmap, CFG_OTHER, CFG_OTHER_RID_MASK, 724 smb->use_usb_otg ? CFG_OTHER_RID_ENABLED_AUTO_OTG : 0); 725 if (ret < 0) 726 goto fail; 727 728 /* 729 * Make the charging functionality controllable by a write to the 730 * command register unless pin control is specified in the platform 731 * data. 732 */ 733 switch (smb->enable_control) { 734 case SMB3XX_CHG_ENABLE_PIN_ACTIVE_LOW: 735 val = CFG_PIN_EN_CTRL_ACTIVE_LOW; 736 break; 737 case SMB3XX_CHG_ENABLE_PIN_ACTIVE_HIGH: 738 val = CFG_PIN_EN_CTRL_ACTIVE_HIGH; 739 break; 740 default: 741 val = 0; 742 break; 743 } 744 745 ret = regmap_update_bits(smb->regmap, CFG_PIN, CFG_PIN_EN_CTRL_MASK, 746 val); 747 if (ret < 0) 748 goto fail; 749 750 /* Disable Automatic Power Source Detection (APSD) interrupt. */ 751 ret = regmap_update_bits(smb->regmap, CFG_PIN, CFG_PIN_EN_APSD_IRQ, 0); 752 if (ret < 0) 753 goto fail; 754 755 ret = smb347_update_ps_status(smb); 756 if (ret < 0) 757 goto fail; 758 759 ret = smb347_start_stop_charging(smb); 760 761 fail: 762 smb347_set_writable(smb, false); 763 return ret; 764 } 765 766 static irqreturn_t smb347_interrupt(int irq, void *data) 767 { 768 struct smb347_charger *smb = data; 769 unsigned int stat_c, irqstat_c, irqstat_d, irqstat_e; 770 bool handled = false; 771 int ret; 772 773 /* SMB347 it needs at least 20ms for setting IRQSTAT_E_*IN_UV_IRQ */ 774 usleep_range(25000, 35000); 775 776 ret = regmap_read(smb->regmap, STAT_C, &stat_c); 777 if (ret < 0) { 778 dev_warn(smb->dev, "reading STAT_C failed\n"); 779 return IRQ_NONE; 780 } 781 782 ret = regmap_read(smb->regmap, IRQSTAT_C, &irqstat_c); 783 if (ret < 0) { 784 dev_warn(smb->dev, "reading IRQSTAT_C failed\n"); 785 return IRQ_NONE; 786 } 787 788 ret = regmap_read(smb->regmap, IRQSTAT_D, &irqstat_d); 789 if (ret < 0) { 790 dev_warn(smb->dev, "reading IRQSTAT_D failed\n"); 791 return IRQ_NONE; 792 } 793 794 ret = regmap_read(smb->regmap, IRQSTAT_E, &irqstat_e); 795 if (ret < 0) { 796 dev_warn(smb->dev, "reading IRQSTAT_E failed\n"); 797 return IRQ_NONE; 798 } 799 800 /* 801 * If we get charger error we report the error back to user. 802 * If the error is recovered charging will resume again. 803 */ 804 if (stat_c & STAT_C_CHARGER_ERROR) { 805 dev_err(smb->dev, "charging stopped due to charger error\n"); 806 if (smb->use_mains) 807 power_supply_changed(smb->mains); 808 if (smb->use_usb) 809 power_supply_changed(smb->usb); 810 handled = true; 811 } 812 813 /* 814 * If we reached the termination current the battery is charged and 815 * we can update the status now. Charging is automatically 816 * disabled by the hardware. 817 */ 818 if (irqstat_c & (IRQSTAT_C_TERMINATION_IRQ | IRQSTAT_C_TAPER_IRQ)) { 819 if (irqstat_c & IRQSTAT_C_TERMINATION_STAT) { 820 if (smb->use_mains) 821 power_supply_changed(smb->mains); 822 if (smb->use_usb) 823 power_supply_changed(smb->usb); 824 } 825 dev_dbg(smb->dev, "going to HW maintenance mode\n"); 826 handled = true; 827 } 828 829 /* 830 * If we got a charger timeout INT that means the charge 831 * full is not detected with in charge timeout value. 832 */ 833 if (irqstat_d & IRQSTAT_D_CHARGE_TIMEOUT_IRQ) { 834 dev_dbg(smb->dev, "total Charge Timeout INT received\n"); 835 836 if (irqstat_d & IRQSTAT_D_CHARGE_TIMEOUT_STAT) 837 dev_warn(smb->dev, "charging stopped due to timeout\n"); 838 if (smb->use_mains) 839 power_supply_changed(smb->mains); 840 if (smb->use_usb) 841 power_supply_changed(smb->usb); 842 handled = true; 843 } 844 845 /* 846 * If we got an under voltage interrupt it means that AC/USB input 847 * was connected or disconnected. 848 */ 849 if (irqstat_e & (IRQSTAT_E_USBIN_UV_IRQ | IRQSTAT_E_DCIN_UV_IRQ)) { 850 if (smb347_update_ps_status(smb) > 0) { 851 smb347_start_stop_charging(smb); 852 if (smb->use_mains) 853 power_supply_changed(smb->mains); 854 if (smb->use_usb) 855 power_supply_changed(smb->usb); 856 } 857 handled = true; 858 } 859 860 return handled ? IRQ_HANDLED : IRQ_NONE; 861 } 862 863 static int smb347_irq_set(struct smb347_charger *smb, bool enable) 864 { 865 int ret; 866 867 if (smb->irq_unsupported) 868 return 0; 869 870 ret = smb347_set_writable(smb, true); 871 if (ret < 0) 872 return ret; 873 874 /* 875 * Enable/disable interrupts for: 876 * - under voltage 877 * - termination current reached 878 * - charger timeout 879 * - charger error 880 */ 881 ret = regmap_update_bits(smb->regmap, CFG_FAULT_IRQ, 0xff, 882 enable ? CFG_FAULT_IRQ_DCIN_UV : 0); 883 if (ret < 0) 884 goto fail; 885 886 ret = regmap_update_bits(smb->regmap, CFG_STATUS_IRQ, 0xff, 887 enable ? (CFG_STATUS_IRQ_TERMINATION_OR_TAPER | 888 CFG_STATUS_IRQ_CHARGE_TIMEOUT) : 0); 889 if (ret < 0) 890 goto fail; 891 892 ret = regmap_update_bits(smb->regmap, CFG_PIN, CFG_PIN_EN_CHARGER_ERROR, 893 enable ? CFG_PIN_EN_CHARGER_ERROR : 0); 894 fail: 895 smb347_set_writable(smb, false); 896 return ret; 897 } 898 899 static inline int smb347_irq_enable(struct smb347_charger *smb) 900 { 901 return smb347_irq_set(smb, true); 902 } 903 904 static inline int smb347_irq_disable(struct smb347_charger *smb) 905 { 906 return smb347_irq_set(smb, false); 907 } 908 909 static int smb347_irq_init(struct smb347_charger *smb, 910 struct i2c_client *client) 911 { 912 int ret; 913 914 ret = devm_request_threaded_irq(smb->dev, client->irq, NULL, 915 smb347_interrupt, IRQF_ONESHOT, 916 client->name, smb); 917 if (ret < 0) 918 return ret; 919 920 ret = smb347_set_writable(smb, true); 921 if (ret < 0) 922 return ret; 923 924 /* 925 * Configure the STAT output to be suitable for interrupts: disable 926 * all other output (except interrupts) and make it active low. 927 */ 928 ret = regmap_update_bits(smb->regmap, CFG_STAT, 929 CFG_STAT_ACTIVE_HIGH | CFG_STAT_DISABLED, 930 CFG_STAT_DISABLED); 931 932 smb347_set_writable(smb, false); 933 934 return ret; 935 } 936 937 /* 938 * Returns the constant charge current programmed 939 * into the charger in uA. 940 */ 941 static int get_const_charge_current(struct smb347_charger *smb) 942 { 943 unsigned int id = smb->id; 944 int ret, intval; 945 unsigned int v; 946 947 if (!smb347_is_ps_online(smb)) 948 return -ENODATA; 949 950 ret = regmap_read(smb->regmap, STAT_B, &v); 951 if (ret < 0) 952 return ret; 953 954 /* 955 * The current value is composition of FCC and PCC values 956 * and we can detect which table to use from bit 5. 957 */ 958 if (v & 0x20) { 959 intval = hw_to_current(fcc_tbl[id], 960 ARRAY_SIZE(fcc_tbl[id]), v & 7); 961 } else { 962 v >>= 3; 963 intval = hw_to_current(pcc_tbl[id], 964 ARRAY_SIZE(pcc_tbl[id]), v & 7); 965 } 966 967 return intval; 968 } 969 970 /* 971 * Returns the constant charge voltage programmed 972 * into the charger in uV. 973 */ 974 static int get_const_charge_voltage(struct smb347_charger *smb) 975 { 976 int ret, intval; 977 unsigned int v; 978 979 if (!smb347_is_ps_online(smb)) 980 return -ENODATA; 981 982 ret = regmap_read(smb->regmap, STAT_A, &v); 983 if (ret < 0) 984 return ret; 985 986 v &= STAT_A_FLOAT_VOLTAGE_MASK; 987 if (v > 0x3d) 988 v = 0x3d; 989 990 intval = 3500000 + v * 20000; 991 992 return intval; 993 } 994 995 static int smb347_get_charging_status(struct smb347_charger *smb, 996 struct power_supply *psy) 997 { 998 int ret, status; 999 unsigned int val; 1000 1001 if (psy->desc->type == POWER_SUPPLY_TYPE_USB) { 1002 if (!smb->usb_online) 1003 return POWER_SUPPLY_STATUS_DISCHARGING; 1004 } else { 1005 if (!smb->mains_online) 1006 return POWER_SUPPLY_STATUS_DISCHARGING; 1007 } 1008 1009 ret = regmap_read(smb->regmap, STAT_C, &val); 1010 if (ret < 0) 1011 return ret; 1012 1013 if ((val & STAT_C_CHARGER_ERROR) || 1014 (val & STAT_C_HOLDOFF_STAT)) { 1015 /* 1016 * set to NOT CHARGING upon charger error 1017 * or charging has stopped. 1018 */ 1019 status = POWER_SUPPLY_STATUS_NOT_CHARGING; 1020 } else { 1021 if ((val & STAT_C_CHG_MASK) >> STAT_C_CHG_SHIFT) { 1022 /* 1023 * set to charging if battery is in pre-charge, 1024 * fast charge or taper charging mode. 1025 */ 1026 status = POWER_SUPPLY_STATUS_CHARGING; 1027 } else if (val & STAT_C_CHG_TERM) { 1028 /* 1029 * set the status to FULL if battery is not in pre 1030 * charge, fast charge or taper charging mode AND 1031 * charging is terminated at least once. 1032 */ 1033 status = POWER_SUPPLY_STATUS_FULL; 1034 } else { 1035 /* 1036 * in this case no charger error or termination 1037 * occured but charging is not in progress!!! 1038 */ 1039 status = POWER_SUPPLY_STATUS_NOT_CHARGING; 1040 } 1041 } 1042 1043 return status; 1044 } 1045 1046 static int smb347_get_property_locked(struct power_supply *psy, 1047 enum power_supply_property prop, 1048 union power_supply_propval *val) 1049 { 1050 struct smb347_charger *smb = power_supply_get_drvdata(psy); 1051 int ret; 1052 1053 switch (prop) { 1054 case POWER_SUPPLY_PROP_STATUS: 1055 ret = smb347_get_charging_status(smb, psy); 1056 if (ret < 0) 1057 return ret; 1058 val->intval = ret; 1059 break; 1060 1061 case POWER_SUPPLY_PROP_CHARGE_TYPE: 1062 if (psy->desc->type == POWER_SUPPLY_TYPE_USB) { 1063 if (!smb->usb_online) 1064 return -ENODATA; 1065 } else { 1066 if (!smb->mains_online) 1067 return -ENODATA; 1068 } 1069 1070 /* 1071 * We handle trickle and pre-charging the same, and taper 1072 * and none the same. 1073 */ 1074 switch (smb347_charging_status(smb)) { 1075 case 1: 1076 val->intval = POWER_SUPPLY_CHARGE_TYPE_TRICKLE; 1077 break; 1078 case 2: 1079 val->intval = POWER_SUPPLY_CHARGE_TYPE_FAST; 1080 break; 1081 default: 1082 val->intval = POWER_SUPPLY_CHARGE_TYPE_NONE; 1083 break; 1084 } 1085 break; 1086 1087 case POWER_SUPPLY_PROP_ONLINE: 1088 if (psy->desc->type == POWER_SUPPLY_TYPE_USB) 1089 val->intval = smb->usb_online; 1090 else 1091 val->intval = smb->mains_online; 1092 break; 1093 1094 case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE: 1095 ret = get_const_charge_voltage(smb); 1096 if (ret < 0) 1097 return ret; 1098 val->intval = ret; 1099 break; 1100 1101 case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT: 1102 ret = get_const_charge_current(smb); 1103 if (ret < 0) 1104 return ret; 1105 val->intval = ret; 1106 break; 1107 1108 default: 1109 return -EINVAL; 1110 } 1111 1112 return 0; 1113 } 1114 1115 static int smb347_get_property(struct power_supply *psy, 1116 enum power_supply_property prop, 1117 union power_supply_propval *val) 1118 { 1119 struct smb347_charger *smb = power_supply_get_drvdata(psy); 1120 struct i2c_client *client = to_i2c_client(smb->dev); 1121 int ret; 1122 1123 disable_irq(client->irq); 1124 ret = smb347_get_property_locked(psy, prop, val); 1125 enable_irq(client->irq); 1126 1127 return ret; 1128 } 1129 1130 static enum power_supply_property smb347_properties[] = { 1131 POWER_SUPPLY_PROP_STATUS, 1132 POWER_SUPPLY_PROP_CHARGE_TYPE, 1133 POWER_SUPPLY_PROP_ONLINE, 1134 POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT, 1135 POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE, 1136 }; 1137 1138 static bool smb347_volatile_reg(struct device *dev, unsigned int reg) 1139 { 1140 switch (reg) { 1141 case IRQSTAT_A: 1142 case IRQSTAT_C: 1143 case IRQSTAT_D: 1144 case IRQSTAT_E: 1145 case IRQSTAT_F: 1146 case STAT_A: 1147 case STAT_B: 1148 case STAT_C: 1149 case STAT_E: 1150 return true; 1151 } 1152 1153 return false; 1154 } 1155 1156 static bool smb347_readable_reg(struct device *dev, unsigned int reg) 1157 { 1158 switch (reg) { 1159 case CFG_CHARGE_CURRENT: 1160 case CFG_CURRENT_LIMIT: 1161 case CFG_FLOAT_VOLTAGE: 1162 case CFG_STAT: 1163 case CFG_PIN: 1164 case CFG_THERM: 1165 case CFG_SYSOK: 1166 case CFG_OTHER: 1167 case CFG_OTG: 1168 case CFG_TEMP_LIMIT: 1169 case CFG_FAULT_IRQ: 1170 case CFG_STATUS_IRQ: 1171 case CFG_ADDRESS: 1172 case CMD_A: 1173 case CMD_B: 1174 case CMD_C: 1175 return true; 1176 } 1177 1178 return smb347_volatile_reg(dev, reg); 1179 } 1180 1181 static void smb347_dt_parse_dev_info(struct smb347_charger *smb) 1182 { 1183 struct device *dev = smb->dev; 1184 1185 smb->soft_temp_limit_compensation = 1186 SMB3XX_SOFT_TEMP_COMPENSATE_DEFAULT; 1187 /* 1188 * These properties come from the battery info, still we need to 1189 * pre-initialize the values. See smb347_get_battery_info() below. 1190 */ 1191 smb->soft_cold_temp_limit = SMB3XX_TEMP_USE_DEFAULT; 1192 smb->hard_cold_temp_limit = SMB3XX_TEMP_USE_DEFAULT; 1193 smb->soft_hot_temp_limit = SMB3XX_TEMP_USE_DEFAULT; 1194 smb->hard_hot_temp_limit = SMB3XX_TEMP_USE_DEFAULT; 1195 1196 /* Charging constraints */ 1197 device_property_read_u32(dev, "summit,fast-voltage-threshold-microvolt", 1198 &smb->pre_to_fast_voltage); 1199 device_property_read_u32(dev, "summit,mains-current-limit-microamp", 1200 &smb->mains_current_limit); 1201 device_property_read_u32(dev, "summit,usb-current-limit-microamp", 1202 &smb->usb_hc_current_limit); 1203 1204 /* For thermometer monitoring */ 1205 device_property_read_u32(dev, "summit,chip-temperature-threshold-celsius", 1206 &smb->chip_temp_threshold); 1207 device_property_read_u32(dev, "summit,soft-compensation-method", 1208 &smb->soft_temp_limit_compensation); 1209 device_property_read_u32(dev, "summit,charge-current-compensation-microamp", 1210 &smb->charge_current_compensation); 1211 1212 /* Supported charging mode */ 1213 smb->use_mains = device_property_read_bool(dev, "summit,enable-mains-charging"); 1214 smb->use_usb = device_property_read_bool(dev, "summit,enable-usb-charging"); 1215 smb->use_usb_otg = device_property_read_bool(dev, "summit,enable-otg-charging"); 1216 1217 /* Select charging control */ 1218 device_property_read_u32(dev, "summit,enable-charge-control", 1219 &smb->enable_control); 1220 } 1221 1222 static int smb347_get_battery_info(struct smb347_charger *smb) 1223 { 1224 struct power_supply_battery_info info = {}; 1225 struct power_supply *supply; 1226 int err; 1227 1228 if (smb->mains) 1229 supply = smb->mains; 1230 else 1231 supply = smb->usb; 1232 1233 err = power_supply_get_battery_info(supply, &info); 1234 if (err == -ENXIO || err == -ENODEV) 1235 return 0; 1236 if (err) 1237 return err; 1238 1239 if (info.constant_charge_current_max_ua != -EINVAL) 1240 smb->max_charge_current = info.constant_charge_current_max_ua; 1241 1242 if (info.constant_charge_voltage_max_uv != -EINVAL) 1243 smb->max_charge_voltage = info.constant_charge_voltage_max_uv; 1244 1245 if (info.precharge_current_ua != -EINVAL) 1246 smb->pre_charge_current = info.precharge_current_ua; 1247 1248 if (info.charge_term_current_ua != -EINVAL) 1249 smb->termination_current = info.charge_term_current_ua; 1250 1251 if (info.temp_alert_min != INT_MIN) 1252 smb->soft_cold_temp_limit = info.temp_alert_min; 1253 1254 if (info.temp_alert_max != INT_MAX) 1255 smb->soft_hot_temp_limit = info.temp_alert_max; 1256 1257 if (info.temp_min != INT_MIN) 1258 smb->hard_cold_temp_limit = info.temp_min; 1259 1260 if (info.temp_max != INT_MAX) 1261 smb->hard_hot_temp_limit = info.temp_max; 1262 1263 /* Suspend when battery temperature is outside hard limits */ 1264 if (smb->hard_cold_temp_limit != SMB3XX_TEMP_USE_DEFAULT || 1265 smb->hard_hot_temp_limit != SMB3XX_TEMP_USE_DEFAULT) 1266 smb->suspend_on_hard_temp_limit = true; 1267 1268 return 0; 1269 } 1270 1271 static const struct regmap_config smb347_regmap = { 1272 .reg_bits = 8, 1273 .val_bits = 8, 1274 .max_register = SMB347_MAX_REGISTER, 1275 .volatile_reg = smb347_volatile_reg, 1276 .readable_reg = smb347_readable_reg, 1277 }; 1278 1279 static const struct power_supply_desc smb347_mains_desc = { 1280 .name = "smb347-mains", 1281 .type = POWER_SUPPLY_TYPE_MAINS, 1282 .get_property = smb347_get_property, 1283 .properties = smb347_properties, 1284 .num_properties = ARRAY_SIZE(smb347_properties), 1285 }; 1286 1287 static const struct power_supply_desc smb347_usb_desc = { 1288 .name = "smb347-usb", 1289 .type = POWER_SUPPLY_TYPE_USB, 1290 .get_property = smb347_get_property, 1291 .properties = smb347_properties, 1292 .num_properties = ARRAY_SIZE(smb347_properties), 1293 }; 1294 1295 static int smb347_probe(struct i2c_client *client, 1296 const struct i2c_device_id *id) 1297 { 1298 struct power_supply_config mains_usb_cfg = {}; 1299 struct device *dev = &client->dev; 1300 struct smb347_charger *smb; 1301 int ret; 1302 1303 smb = devm_kzalloc(dev, sizeof(*smb), GFP_KERNEL); 1304 if (!smb) 1305 return -ENOMEM; 1306 smb->dev = &client->dev; 1307 smb->id = id->driver_data; 1308 i2c_set_clientdata(client, smb); 1309 1310 smb347_dt_parse_dev_info(smb); 1311 if (!smb->use_mains && !smb->use_usb) 1312 return -EINVAL; 1313 1314 smb->regmap = devm_regmap_init_i2c(client, &smb347_regmap); 1315 if (IS_ERR(smb->regmap)) 1316 return PTR_ERR(smb->regmap); 1317 1318 mains_usb_cfg.drv_data = smb; 1319 mains_usb_cfg.of_node = dev->of_node; 1320 if (smb->use_mains) { 1321 smb->mains = devm_power_supply_register(dev, &smb347_mains_desc, 1322 &mains_usb_cfg); 1323 if (IS_ERR(smb->mains)) 1324 return PTR_ERR(smb->mains); 1325 } 1326 1327 if (smb->use_usb) { 1328 smb->usb = devm_power_supply_register(dev, &smb347_usb_desc, 1329 &mains_usb_cfg); 1330 if (IS_ERR(smb->usb)) 1331 return PTR_ERR(smb->usb); 1332 } 1333 1334 ret = smb347_get_battery_info(smb); 1335 if (ret) 1336 return ret; 1337 1338 ret = smb347_hw_init(smb); 1339 if (ret < 0) 1340 return ret; 1341 1342 /* 1343 * Interrupt pin is optional. If it is connected, we setup the 1344 * interrupt support here. 1345 */ 1346 if (client->irq) { 1347 ret = smb347_irq_init(smb, client); 1348 if (ret < 0) { 1349 dev_warn(dev, "failed to initialize IRQ: %d\n", ret); 1350 dev_warn(dev, "disabling IRQ support\n"); 1351 smb->irq_unsupported = true; 1352 } else { 1353 smb347_irq_enable(smb); 1354 } 1355 } 1356 1357 return 0; 1358 } 1359 1360 static int smb347_remove(struct i2c_client *client) 1361 { 1362 struct smb347_charger *smb = i2c_get_clientdata(client); 1363 1364 smb347_irq_disable(smb); 1365 1366 return 0; 1367 } 1368 1369 static const struct i2c_device_id smb347_id[] = { 1370 { "smb345", SMB345 }, 1371 { "smb347", SMB347 }, 1372 { "smb358", SMB358 }, 1373 { }, 1374 }; 1375 MODULE_DEVICE_TABLE(i2c, smb347_id); 1376 1377 static const struct of_device_id smb3xx_of_match[] = { 1378 { .compatible = "summit,smb345" }, 1379 { .compatible = "summit,smb347" }, 1380 { .compatible = "summit,smb358" }, 1381 { }, 1382 }; 1383 MODULE_DEVICE_TABLE(of, smb3xx_of_match); 1384 1385 static struct i2c_driver smb347_driver = { 1386 .driver = { 1387 .name = "smb347", 1388 .of_match_table = smb3xx_of_match, 1389 }, 1390 .probe = smb347_probe, 1391 .remove = smb347_remove, 1392 .id_table = smb347_id, 1393 }; 1394 1395 module_i2c_driver(smb347_driver); 1396 1397 MODULE_AUTHOR("Bruce E. Robertson <bruce.e.robertson@intel.com>"); 1398 MODULE_AUTHOR("Mika Westerberg <mika.westerberg@linux.intel.com>"); 1399 MODULE_DESCRIPTION("SMB347 battery charger driver"); 1400 MODULE_LICENSE("GPL"); 1401