1 // SPDX-License-Identifier: GPL-2.0+ 2 /* 3 * Power supply driver for ChromeOS EC based USB PD Charger. 4 * 5 * Copyright (c) 2014 - 2018 Google, Inc 6 */ 7 8 #include <linux/module.h> 9 #include <linux/platform_data/cros_ec_commands.h> 10 #include <linux/platform_data/cros_ec_proto.h> 11 #include <linux/platform_device.h> 12 #include <linux/power_supply.h> 13 #include <linux/slab.h> 14 15 #define CHARGER_USBPD_DIR_NAME "CROS_USBPD_CHARGER%d" 16 #define CHARGER_DEDICATED_DIR_NAME "CROS_DEDICATED_CHARGER" 17 #define CHARGER_DIR_NAME_LENGTH (sizeof(CHARGER_USBPD_DIR_NAME) >= \ 18 sizeof(CHARGER_DEDICATED_DIR_NAME) ? \ 19 sizeof(CHARGER_USBPD_DIR_NAME) : \ 20 sizeof(CHARGER_DEDICATED_DIR_NAME)) 21 #define CHARGER_CACHE_UPDATE_DELAY msecs_to_jiffies(500) 22 #define CHARGER_MANUFACTURER_MODEL_LENGTH 32 23 24 #define DRV_NAME "cros-usbpd-charger" 25 26 struct port_data { 27 int port_number; 28 char name[CHARGER_DIR_NAME_LENGTH]; 29 char manufacturer[CHARGER_MANUFACTURER_MODEL_LENGTH]; 30 char model_name[CHARGER_MANUFACTURER_MODEL_LENGTH]; 31 struct power_supply *psy; 32 struct power_supply_desc psy_desc; 33 int psy_usb_type; 34 int psy_online; 35 int psy_status; 36 int psy_current_max; 37 int psy_voltage_max_design; 38 int psy_voltage_now; 39 int psy_power_max; 40 struct charger_data *charger; 41 unsigned long last_update; 42 }; 43 44 struct charger_data { 45 struct device *dev; 46 struct cros_ec_dev *ec_dev; 47 struct cros_ec_device *ec_device; 48 int num_charger_ports; 49 int num_usbpd_ports; 50 int num_registered_psy; 51 struct port_data *ports[EC_USB_PD_MAX_PORTS]; 52 struct notifier_block notifier; 53 }; 54 55 static enum power_supply_property cros_usbpd_charger_props[] = { 56 POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT, 57 POWER_SUPPLY_PROP_INPUT_VOLTAGE_LIMIT, 58 POWER_SUPPLY_PROP_ONLINE, 59 POWER_SUPPLY_PROP_STATUS, 60 POWER_SUPPLY_PROP_CURRENT_MAX, 61 POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN, 62 POWER_SUPPLY_PROP_VOLTAGE_NOW, 63 POWER_SUPPLY_PROP_MODEL_NAME, 64 POWER_SUPPLY_PROP_MANUFACTURER, 65 POWER_SUPPLY_PROP_USB_TYPE 66 }; 67 68 static enum power_supply_property cros_usbpd_dedicated_charger_props[] = { 69 POWER_SUPPLY_PROP_ONLINE, 70 POWER_SUPPLY_PROP_STATUS, 71 POWER_SUPPLY_PROP_VOLTAGE_NOW, 72 }; 73 74 static enum power_supply_usb_type cros_usbpd_charger_usb_types[] = { 75 POWER_SUPPLY_USB_TYPE_UNKNOWN, 76 POWER_SUPPLY_USB_TYPE_SDP, 77 POWER_SUPPLY_USB_TYPE_DCP, 78 POWER_SUPPLY_USB_TYPE_CDP, 79 POWER_SUPPLY_USB_TYPE_C, 80 POWER_SUPPLY_USB_TYPE_PD, 81 POWER_SUPPLY_USB_TYPE_PD_DRP, 82 POWER_SUPPLY_USB_TYPE_APPLE_BRICK_ID 83 }; 84 85 /* Input voltage/current limit in mV/mA. Default to none. */ 86 static u16 input_voltage_limit = EC_POWER_LIMIT_NONE; 87 static u16 input_current_limit = EC_POWER_LIMIT_NONE; 88 89 static bool cros_usbpd_charger_port_is_dedicated(struct port_data *port) 90 { 91 return port->port_number >= port->charger->num_usbpd_ports; 92 } 93 94 static int cros_usbpd_charger_ec_command(struct charger_data *charger, 95 unsigned int version, 96 unsigned int command, 97 void *outdata, 98 unsigned int outsize, 99 void *indata, 100 unsigned int insize) 101 { 102 struct cros_ec_dev *ec_dev = charger->ec_dev; 103 struct cros_ec_command *msg; 104 int ret; 105 106 msg = kzalloc(sizeof(*msg) + max(outsize, insize), GFP_KERNEL); 107 if (!msg) 108 return -ENOMEM; 109 110 msg->version = version; 111 msg->command = ec_dev->cmd_offset + command; 112 msg->outsize = outsize; 113 msg->insize = insize; 114 115 if (outsize) 116 memcpy(msg->data, outdata, outsize); 117 118 ret = cros_ec_cmd_xfer_status(charger->ec_device, msg); 119 if (ret >= 0 && insize) 120 memcpy(indata, msg->data, insize); 121 122 kfree(msg); 123 return ret; 124 } 125 126 static int cros_usbpd_charger_get_num_ports(struct charger_data *charger) 127 { 128 struct ec_response_charge_port_count resp; 129 int ret; 130 131 ret = cros_usbpd_charger_ec_command(charger, 0, 132 EC_CMD_CHARGE_PORT_COUNT, 133 NULL, 0, &resp, sizeof(resp)); 134 if (ret < 0) 135 return ret; 136 137 return resp.port_count; 138 } 139 140 static int cros_usbpd_charger_get_usbpd_num_ports(struct charger_data *charger) 141 { 142 struct ec_response_usb_pd_ports resp; 143 int ret; 144 145 ret = cros_usbpd_charger_ec_command(charger, 0, EC_CMD_USB_PD_PORTS, 146 NULL, 0, &resp, sizeof(resp)); 147 if (ret < 0) 148 return ret; 149 150 return resp.num_ports; 151 } 152 153 static int cros_usbpd_charger_get_discovery_info(struct port_data *port) 154 { 155 struct charger_data *charger = port->charger; 156 struct ec_params_usb_pd_discovery_entry resp; 157 struct ec_params_usb_pd_info_request req; 158 int ret; 159 160 req.port = port->port_number; 161 162 ret = cros_usbpd_charger_ec_command(charger, 0, 163 EC_CMD_USB_PD_DISCOVERY, 164 &req, sizeof(req), 165 &resp, sizeof(resp)); 166 if (ret < 0) { 167 dev_err(charger->dev, 168 "Unable to query discovery info (err:0x%x)\n", ret); 169 return ret; 170 } 171 172 dev_dbg(charger->dev, "Port %d: VID = 0x%x, PID=0x%x, PTYPE=0x%x\n", 173 port->port_number, resp.vid, resp.pid, resp.ptype); 174 175 snprintf(port->manufacturer, sizeof(port->manufacturer), "%x", 176 resp.vid); 177 snprintf(port->model_name, sizeof(port->model_name), "%x", resp.pid); 178 179 return 0; 180 } 181 182 static int cros_usbpd_charger_get_power_info(struct port_data *port) 183 { 184 struct charger_data *charger = port->charger; 185 struct ec_response_usb_pd_power_info resp; 186 struct ec_params_usb_pd_power_info req; 187 int last_psy_status, last_psy_usb_type; 188 struct device *dev = charger->dev; 189 int ret; 190 191 req.port = port->port_number; 192 ret = cros_usbpd_charger_ec_command(charger, 0, 193 EC_CMD_USB_PD_POWER_INFO, 194 &req, sizeof(req), 195 &resp, sizeof(resp)); 196 if (ret < 0) { 197 dev_err(dev, "Unable to query PD power info (err:0x%x)\n", ret); 198 return ret; 199 } 200 201 last_psy_status = port->psy_status; 202 last_psy_usb_type = port->psy_usb_type; 203 204 switch (resp.role) { 205 case USB_PD_PORT_POWER_DISCONNECTED: 206 port->psy_status = POWER_SUPPLY_STATUS_NOT_CHARGING; 207 port->psy_online = 0; 208 break; 209 case USB_PD_PORT_POWER_SOURCE: 210 port->psy_status = POWER_SUPPLY_STATUS_NOT_CHARGING; 211 port->psy_online = 0; 212 break; 213 case USB_PD_PORT_POWER_SINK: 214 port->psy_status = POWER_SUPPLY_STATUS_CHARGING; 215 port->psy_online = 1; 216 break; 217 case USB_PD_PORT_POWER_SINK_NOT_CHARGING: 218 port->psy_status = POWER_SUPPLY_STATUS_NOT_CHARGING; 219 port->psy_online = 1; 220 break; 221 default: 222 dev_err(dev, "Unknown role %d\n", resp.role); 223 break; 224 } 225 226 port->psy_voltage_max_design = resp.meas.voltage_max; 227 port->psy_voltage_now = resp.meas.voltage_now; 228 port->psy_current_max = resp.meas.current_max; 229 port->psy_power_max = resp.max_power; 230 231 switch (resp.type) { 232 case USB_CHG_TYPE_BC12_SDP: 233 case USB_CHG_TYPE_VBUS: 234 port->psy_usb_type = POWER_SUPPLY_USB_TYPE_SDP; 235 break; 236 case USB_CHG_TYPE_NONE: 237 /* 238 * For dual-role devices when we are a source, the firmware 239 * reports the type as NONE. Report such chargers as type 240 * USB_PD_DRP. 241 */ 242 if (resp.role == USB_PD_PORT_POWER_SOURCE && resp.dualrole) 243 port->psy_usb_type = POWER_SUPPLY_USB_TYPE_PD_DRP; 244 else 245 port->psy_usb_type = POWER_SUPPLY_USB_TYPE_SDP; 246 break; 247 case USB_CHG_TYPE_OTHER: 248 case USB_CHG_TYPE_PROPRIETARY: 249 port->psy_usb_type = POWER_SUPPLY_USB_TYPE_APPLE_BRICK_ID; 250 break; 251 case USB_CHG_TYPE_C: 252 port->psy_usb_type = POWER_SUPPLY_USB_TYPE_C; 253 break; 254 case USB_CHG_TYPE_BC12_DCP: 255 port->psy_usb_type = POWER_SUPPLY_USB_TYPE_DCP; 256 break; 257 case USB_CHG_TYPE_BC12_CDP: 258 port->psy_usb_type = POWER_SUPPLY_USB_TYPE_CDP; 259 break; 260 case USB_CHG_TYPE_PD: 261 if (resp.dualrole) 262 port->psy_usb_type = POWER_SUPPLY_USB_TYPE_PD_DRP; 263 else 264 port->psy_usb_type = POWER_SUPPLY_USB_TYPE_PD; 265 break; 266 case USB_CHG_TYPE_UNKNOWN: 267 /* 268 * While the EC is trying to determine the type of charger that 269 * has been plugged in, it will report the charger type as 270 * unknown. Additionally since the power capabilities are 271 * unknown, report the max current and voltage as zero. 272 */ 273 port->psy_usb_type = POWER_SUPPLY_USB_TYPE_UNKNOWN; 274 port->psy_voltage_max_design = 0; 275 port->psy_current_max = 0; 276 break; 277 default: 278 dev_err(dev, "Port %d: default case!\n", port->port_number); 279 port->psy_usb_type = POWER_SUPPLY_USB_TYPE_SDP; 280 } 281 282 if (cros_usbpd_charger_port_is_dedicated(port)) 283 port->psy_desc.type = POWER_SUPPLY_TYPE_MAINS; 284 else 285 port->psy_desc.type = POWER_SUPPLY_TYPE_USB; 286 287 dev_dbg(dev, 288 "Port %d: type=%d vmax=%d vnow=%d cmax=%d clim=%d pmax=%d\n", 289 port->port_number, resp.type, resp.meas.voltage_max, 290 resp.meas.voltage_now, resp.meas.current_max, 291 resp.meas.current_lim, resp.max_power); 292 293 /* 294 * If power supply type or status changed, explicitly call 295 * power_supply_changed. This results in udev event getting generated 296 * and allows user mode apps to react quicker instead of waiting for 297 * their next poll of power supply status. 298 */ 299 if (last_psy_usb_type != port->psy_usb_type || 300 last_psy_status != port->psy_status) 301 power_supply_changed(port->psy); 302 303 return 0; 304 } 305 306 static int cros_usbpd_charger_get_port_status(struct port_data *port, 307 bool ratelimit) 308 { 309 int ret; 310 311 if (ratelimit && 312 time_is_after_jiffies(port->last_update + 313 CHARGER_CACHE_UPDATE_DELAY)) 314 return 0; 315 316 ret = cros_usbpd_charger_get_power_info(port); 317 if (ret < 0) 318 return ret; 319 320 if (!cros_usbpd_charger_port_is_dedicated(port)) 321 ret = cros_usbpd_charger_get_discovery_info(port); 322 port->last_update = jiffies; 323 324 return ret; 325 } 326 327 static int cros_usbpd_charger_set_ext_power_limit(struct charger_data *charger, 328 u16 current_lim, 329 u16 voltage_lim) 330 { 331 struct ec_params_external_power_limit_v1 req; 332 int ret; 333 334 req.current_lim = current_lim; 335 req.voltage_lim = voltage_lim; 336 337 ret = cros_usbpd_charger_ec_command(charger, 0, 338 EC_CMD_EXTERNAL_POWER_LIMIT, 339 &req, sizeof(req), NULL, 0); 340 if (ret < 0) 341 dev_err(charger->dev, 342 "Unable to set the 'External Power Limit': %d\n", ret); 343 344 return ret; 345 } 346 347 static void cros_usbpd_charger_power_changed(struct power_supply *psy) 348 { 349 struct port_data *port = power_supply_get_drvdata(psy); 350 struct charger_data *charger = port->charger; 351 int i; 352 353 for (i = 0; i < charger->num_registered_psy; i++) 354 cros_usbpd_charger_get_port_status(charger->ports[i], false); 355 } 356 357 static int cros_usbpd_charger_get_prop(struct power_supply *psy, 358 enum power_supply_property psp, 359 union power_supply_propval *val) 360 { 361 struct port_data *port = power_supply_get_drvdata(psy); 362 struct charger_data *charger = port->charger; 363 struct cros_ec_device *ec_device = charger->ec_device; 364 struct device *dev = charger->dev; 365 int ret; 366 367 /* Only refresh ec_port_status for dynamic properties */ 368 switch (psp) { 369 case POWER_SUPPLY_PROP_ONLINE: 370 /* 371 * If mkbp_event_supported, then we can be assured that 372 * the driver's state for the online property is consistent 373 * with the hardware. However, if we aren't event driven, 374 * the optimization before to skip an ec_port_status get 375 * and only returned cached values of the online property will 376 * cause a delay in detecting a cable attach until one of the 377 * other properties are read. 378 * 379 * Allow an ec_port_status refresh for online property check 380 * if we're not already online to check for plug events if 381 * not mkbp_event_supported. 382 */ 383 if (ec_device->mkbp_event_supported || port->psy_online) 384 break; 385 /* fall through */ 386 case POWER_SUPPLY_PROP_CURRENT_MAX: 387 case POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN: 388 case POWER_SUPPLY_PROP_VOLTAGE_NOW: 389 ret = cros_usbpd_charger_get_port_status(port, true); 390 if (ret < 0) { 391 dev_err(dev, "Failed to get port status (err:0x%x)\n", 392 ret); 393 return -EINVAL; 394 } 395 break; 396 default: 397 break; 398 } 399 400 switch (psp) { 401 case POWER_SUPPLY_PROP_ONLINE: 402 val->intval = port->psy_online; 403 break; 404 case POWER_SUPPLY_PROP_STATUS: 405 val->intval = port->psy_status; 406 break; 407 case POWER_SUPPLY_PROP_CURRENT_MAX: 408 val->intval = port->psy_current_max * 1000; 409 break; 410 case POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN: 411 val->intval = port->psy_voltage_max_design * 1000; 412 break; 413 case POWER_SUPPLY_PROP_VOLTAGE_NOW: 414 val->intval = port->psy_voltage_now * 1000; 415 break; 416 case POWER_SUPPLY_PROP_USB_TYPE: 417 val->intval = port->psy_usb_type; 418 break; 419 case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT: 420 if (input_current_limit == EC_POWER_LIMIT_NONE) 421 val->intval = -1; 422 else 423 val->intval = input_current_limit * 1000; 424 break; 425 case POWER_SUPPLY_PROP_INPUT_VOLTAGE_LIMIT: 426 if (input_voltage_limit == EC_POWER_LIMIT_NONE) 427 val->intval = -1; 428 else 429 val->intval = input_voltage_limit * 1000; 430 break; 431 case POWER_SUPPLY_PROP_MODEL_NAME: 432 val->strval = port->model_name; 433 break; 434 case POWER_SUPPLY_PROP_MANUFACTURER: 435 val->strval = port->manufacturer; 436 break; 437 default: 438 return -EINVAL; 439 } 440 441 return 0; 442 } 443 444 static int cros_usbpd_charger_set_prop(struct power_supply *psy, 445 enum power_supply_property psp, 446 const union power_supply_propval *val) 447 { 448 struct port_data *port = power_supply_get_drvdata(psy); 449 struct charger_data *charger = port->charger; 450 struct device *dev = charger->dev; 451 u16 intval; 452 int ret; 453 454 /* U16_MAX in mV/mA is the maximum supported value */ 455 if (val->intval >= U16_MAX * 1000) 456 return -EINVAL; 457 /* A negative number is used to clear the limit */ 458 if (val->intval < 0) 459 intval = EC_POWER_LIMIT_NONE; 460 else /* Convert from uA/uV to mA/mV */ 461 intval = val->intval / 1000; 462 463 switch (psp) { 464 case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT: 465 ret = cros_usbpd_charger_set_ext_power_limit(charger, intval, 466 input_voltage_limit); 467 if (ret < 0) 468 break; 469 470 input_current_limit = intval; 471 if (input_current_limit == EC_POWER_LIMIT_NONE) 472 dev_info(dev, 473 "External Current Limit cleared for all ports\n"); 474 else 475 dev_info(dev, 476 "External Current Limit set to %dmA for all ports\n", 477 input_current_limit); 478 break; 479 case POWER_SUPPLY_PROP_INPUT_VOLTAGE_LIMIT: 480 ret = cros_usbpd_charger_set_ext_power_limit(charger, 481 input_current_limit, 482 intval); 483 if (ret < 0) 484 break; 485 486 input_voltage_limit = intval; 487 if (input_voltage_limit == EC_POWER_LIMIT_NONE) 488 dev_info(dev, 489 "External Voltage Limit cleared for all ports\n"); 490 else 491 dev_info(dev, 492 "External Voltage Limit set to %dmV for all ports\n", 493 input_voltage_limit); 494 break; 495 default: 496 ret = -EINVAL; 497 } 498 499 return ret; 500 } 501 502 static int cros_usbpd_charger_property_is_writeable(struct power_supply *psy, 503 enum power_supply_property psp) 504 { 505 int ret; 506 507 switch (psp) { 508 case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT: 509 case POWER_SUPPLY_PROP_INPUT_VOLTAGE_LIMIT: 510 ret = 1; 511 break; 512 default: 513 ret = 0; 514 } 515 516 return ret; 517 } 518 519 static int cros_usbpd_charger_ec_event(struct notifier_block *nb, 520 unsigned long queued_during_suspend, 521 void *_notify) 522 { 523 struct cros_ec_device *ec_device; 524 struct charger_data *charger; 525 u32 host_event; 526 527 charger = container_of(nb, struct charger_data, notifier); 528 ec_device = charger->ec_device; 529 530 host_event = cros_ec_get_host_event(ec_device); 531 if (host_event & EC_HOST_EVENT_MASK(EC_HOST_EVENT_PD_MCU)) { 532 cros_usbpd_charger_power_changed(charger->ports[0]->psy); 533 return NOTIFY_OK; 534 } else { 535 return NOTIFY_DONE; 536 } 537 } 538 539 static void cros_usbpd_charger_unregister_notifier(void *data) 540 { 541 struct charger_data *charger = data; 542 struct cros_ec_device *ec_device = charger->ec_device; 543 544 blocking_notifier_chain_unregister(&ec_device->event_notifier, 545 &charger->notifier); 546 } 547 548 static int cros_usbpd_charger_probe(struct platform_device *pd) 549 { 550 struct cros_ec_dev *ec_dev = dev_get_drvdata(pd->dev.parent); 551 struct cros_ec_device *ec_device = ec_dev->ec_dev; 552 struct power_supply_desc *psy_desc; 553 struct device *dev = &pd->dev; 554 struct charger_data *charger; 555 struct power_supply *psy; 556 struct port_data *port; 557 int ret = -EINVAL; 558 int i; 559 560 charger = devm_kzalloc(dev, sizeof(struct charger_data), 561 GFP_KERNEL); 562 if (!charger) 563 return -ENOMEM; 564 565 charger->dev = dev; 566 charger->ec_dev = ec_dev; 567 charger->ec_device = ec_device; 568 569 platform_set_drvdata(pd, charger); 570 571 /* 572 * We need to know the number of USB PD ports in order to know whether 573 * there is a dedicated port. The dedicated port will always be 574 * after the USB PD ports, and there should be only one. 575 */ 576 charger->num_usbpd_ports = 577 cros_usbpd_charger_get_usbpd_num_ports(charger); 578 if (charger->num_usbpd_ports <= 0) { 579 /* 580 * This can happen on a system that doesn't support USB PD. 581 * Log a message, but no need to warn. 582 */ 583 dev_info(dev, "No USB PD charging ports found\n"); 584 } 585 586 charger->num_charger_ports = cros_usbpd_charger_get_num_ports(charger); 587 if (charger->num_charger_ports < 0) { 588 /* 589 * This can happen on a system that doesn't support USB PD. 590 * Log a message, but no need to warn. 591 * Older ECs do not support the above command, in that case 592 * let's set up the number of charger ports equal to the number 593 * of USB PD ports 594 */ 595 dev_info(dev, "Could not get charger port count\n"); 596 charger->num_charger_ports = charger->num_usbpd_ports; 597 } 598 599 if (charger->num_charger_ports <= 0) { 600 /* 601 * This can happen on a system that doesn't support USB PD and 602 * doesn't have a dedicated port. 603 * Log a message, but no need to warn. 604 */ 605 dev_info(dev, "No charging ports found\n"); 606 ret = -ENODEV; 607 goto fail_nowarn; 608 } 609 610 /* 611 * Sanity checks on the number of ports: 612 * there should be at most 1 dedicated port 613 */ 614 if (charger->num_charger_ports < charger->num_usbpd_ports || 615 charger->num_charger_ports > (charger->num_usbpd_ports + 1)) { 616 dev_err(dev, "Unexpected number of charge port count\n"); 617 ret = -EPROTO; 618 goto fail_nowarn; 619 } 620 621 for (i = 0; i < charger->num_charger_ports; i++) { 622 struct power_supply_config psy_cfg = {}; 623 624 port = devm_kzalloc(dev, sizeof(struct port_data), GFP_KERNEL); 625 if (!port) { 626 ret = -ENOMEM; 627 goto fail; 628 } 629 630 port->charger = charger; 631 port->port_number = i; 632 633 psy_desc = &port->psy_desc; 634 psy_desc->get_property = cros_usbpd_charger_get_prop; 635 psy_desc->set_property = cros_usbpd_charger_set_prop; 636 psy_desc->property_is_writeable = 637 cros_usbpd_charger_property_is_writeable; 638 psy_desc->external_power_changed = 639 cros_usbpd_charger_power_changed; 640 psy_cfg.drv_data = port; 641 642 if (cros_usbpd_charger_port_is_dedicated(port)) { 643 sprintf(port->name, CHARGER_DEDICATED_DIR_NAME); 644 psy_desc->type = POWER_SUPPLY_TYPE_MAINS; 645 psy_desc->properties = 646 cros_usbpd_dedicated_charger_props; 647 psy_desc->num_properties = 648 ARRAY_SIZE(cros_usbpd_dedicated_charger_props); 649 } else { 650 sprintf(port->name, CHARGER_USBPD_DIR_NAME, i); 651 psy_desc->type = POWER_SUPPLY_TYPE_USB; 652 psy_desc->properties = cros_usbpd_charger_props; 653 psy_desc->num_properties = 654 ARRAY_SIZE(cros_usbpd_charger_props); 655 psy_desc->usb_types = cros_usbpd_charger_usb_types; 656 psy_desc->num_usb_types = 657 ARRAY_SIZE(cros_usbpd_charger_usb_types); 658 } 659 660 psy_desc->name = port->name; 661 662 psy = devm_power_supply_register_no_ws(dev, psy_desc, 663 &psy_cfg); 664 if (IS_ERR(psy)) { 665 dev_err(dev, "Failed to register power supply\n"); 666 continue; 667 } 668 port->psy = psy; 669 670 charger->ports[charger->num_registered_psy++] = port; 671 } 672 673 if (!charger->num_registered_psy) { 674 ret = -ENODEV; 675 dev_err(dev, "No power supplies registered\n"); 676 goto fail; 677 } 678 679 if (ec_device->mkbp_event_supported) { 680 /* Get PD events from the EC */ 681 charger->notifier.notifier_call = cros_usbpd_charger_ec_event; 682 ret = blocking_notifier_chain_register( 683 &ec_device->event_notifier, 684 &charger->notifier); 685 if (ret < 0) { 686 dev_warn(dev, "failed to register notifier\n"); 687 } else { 688 ret = devm_add_action_or_reset(dev, 689 cros_usbpd_charger_unregister_notifier, 690 charger); 691 if (ret < 0) 692 goto fail; 693 } 694 } 695 696 return 0; 697 698 fail: 699 WARN(1, "%s: Failing probe (err:0x%x)\n", dev_name(dev), ret); 700 701 fail_nowarn: 702 dev_info(dev, "Failing probe (err:0x%x)\n", ret); 703 return ret; 704 } 705 706 #ifdef CONFIG_PM_SLEEP 707 static int cros_usbpd_charger_resume(struct device *dev) 708 { 709 struct charger_data *charger = dev_get_drvdata(dev); 710 int i; 711 712 if (!charger) 713 return 0; 714 715 for (i = 0; i < charger->num_registered_psy; i++) { 716 power_supply_changed(charger->ports[i]->psy); 717 charger->ports[i]->last_update = 718 jiffies - CHARGER_CACHE_UPDATE_DELAY; 719 } 720 721 return 0; 722 } 723 #endif 724 725 static SIMPLE_DEV_PM_OPS(cros_usbpd_charger_pm_ops, NULL, 726 cros_usbpd_charger_resume); 727 728 static struct platform_driver cros_usbpd_charger_driver = { 729 .driver = { 730 .name = DRV_NAME, 731 .pm = &cros_usbpd_charger_pm_ops, 732 }, 733 .probe = cros_usbpd_charger_probe 734 }; 735 736 module_platform_driver(cros_usbpd_charger_driver); 737 738 MODULE_LICENSE("GPL"); 739 MODULE_DESCRIPTION("ChromeOS EC USBPD charger"); 740 MODULE_ALIAS("platform:" DRV_NAME); 741