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/mfd/cros_ec.h> 9 #include <linux/module.h> 10 #include <linux/platform_data/cros_ec_commands.h> 11 #include <linux/platform_data/cros_ec_proto.h> 12 #include <linux/platform_device.h> 13 #include <linux/power_supply.h> 14 #include <linux/slab.h> 15 16 #define CHARGER_USBPD_DIR_NAME "CROS_USBPD_CHARGER%d" 17 #define CHARGER_DEDICATED_DIR_NAME "CROS_DEDICATED_CHARGER" 18 #define CHARGER_DIR_NAME_LENGTH (sizeof(CHARGER_USBPD_DIR_NAME) >= \ 19 sizeof(CHARGER_DEDICATED_DIR_NAME) ? \ 20 sizeof(CHARGER_USBPD_DIR_NAME) : \ 21 sizeof(CHARGER_DEDICATED_DIR_NAME)) 22 #define CHARGER_CACHE_UPDATE_DELAY msecs_to_jiffies(500) 23 #define CHARGER_MANUFACTURER_MODEL_LENGTH 32 24 25 #define DRV_NAME "cros-usbpd-charger" 26 27 struct port_data { 28 int port_number; 29 char name[CHARGER_DIR_NAME_LENGTH]; 30 char manufacturer[CHARGER_MANUFACTURER_MODEL_LENGTH]; 31 char model_name[CHARGER_MANUFACTURER_MODEL_LENGTH]; 32 struct power_supply *psy; 33 struct power_supply_desc psy_desc; 34 int psy_usb_type; 35 int psy_online; 36 int psy_status; 37 int psy_current_max; 38 int psy_voltage_max_design; 39 int psy_voltage_now; 40 int psy_power_max; 41 struct charger_data *charger; 42 unsigned long last_update; 43 }; 44 45 struct charger_data { 46 struct device *dev; 47 struct cros_ec_dev *ec_dev; 48 struct cros_ec_device *ec_device; 49 int num_charger_ports; 50 int num_usbpd_ports; 51 int num_registered_psy; 52 struct port_data *ports[EC_USB_PD_MAX_PORTS]; 53 struct notifier_block notifier; 54 }; 55 56 static enum power_supply_property cros_usbpd_charger_props[] = { 57 POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT, 58 POWER_SUPPLY_PROP_INPUT_VOLTAGE_LIMIT, 59 POWER_SUPPLY_PROP_ONLINE, 60 POWER_SUPPLY_PROP_STATUS, 61 POWER_SUPPLY_PROP_CURRENT_MAX, 62 POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN, 63 POWER_SUPPLY_PROP_VOLTAGE_NOW, 64 POWER_SUPPLY_PROP_MODEL_NAME, 65 POWER_SUPPLY_PROP_MANUFACTURER, 66 POWER_SUPPLY_PROP_USB_TYPE 67 }; 68 69 static enum power_supply_property cros_usbpd_dedicated_charger_props[] = { 70 POWER_SUPPLY_PROP_ONLINE, 71 POWER_SUPPLY_PROP_STATUS, 72 POWER_SUPPLY_PROP_VOLTAGE_NOW, 73 }; 74 75 static enum power_supply_usb_type cros_usbpd_charger_usb_types[] = { 76 POWER_SUPPLY_USB_TYPE_UNKNOWN, 77 POWER_SUPPLY_USB_TYPE_SDP, 78 POWER_SUPPLY_USB_TYPE_DCP, 79 POWER_SUPPLY_USB_TYPE_CDP, 80 POWER_SUPPLY_USB_TYPE_C, 81 POWER_SUPPLY_USB_TYPE_PD, 82 POWER_SUPPLY_USB_TYPE_PD_DRP, 83 POWER_SUPPLY_USB_TYPE_APPLE_BRICK_ID 84 }; 85 86 /* Input voltage/current limit in mV/mA. Default to none. */ 87 static u16 input_voltage_limit = EC_POWER_LIMIT_NONE; 88 static u16 input_current_limit = EC_POWER_LIMIT_NONE; 89 90 static bool cros_usbpd_charger_port_is_dedicated(struct port_data *port) 91 { 92 return port->port_number >= port->charger->num_usbpd_ports; 93 } 94 95 static int cros_usbpd_charger_ec_command(struct charger_data *charger, 96 unsigned int version, 97 unsigned int command, 98 void *outdata, 99 unsigned int outsize, 100 void *indata, 101 unsigned int insize) 102 { 103 struct cros_ec_dev *ec_dev = charger->ec_dev; 104 struct cros_ec_command *msg; 105 int ret; 106 107 msg = kzalloc(sizeof(*msg) + max(outsize, insize), GFP_KERNEL); 108 if (!msg) 109 return -ENOMEM; 110 111 msg->version = version; 112 msg->command = ec_dev->cmd_offset + command; 113 msg->outsize = outsize; 114 msg->insize = insize; 115 116 if (outsize) 117 memcpy(msg->data, outdata, outsize); 118 119 ret = cros_ec_cmd_xfer_status(charger->ec_device, msg); 120 if (ret >= 0 && insize) 121 memcpy(indata, msg->data, insize); 122 123 kfree(msg); 124 return ret; 125 } 126 127 static int cros_usbpd_charger_get_num_ports(struct charger_data *charger) 128 { 129 struct ec_response_charge_port_count resp; 130 int ret; 131 132 ret = cros_usbpd_charger_ec_command(charger, 0, 133 EC_CMD_CHARGE_PORT_COUNT, 134 NULL, 0, &resp, sizeof(resp)); 135 if (ret < 0) { 136 dev_err(charger->dev, 137 "Unable to get the number of ports (err:0x%x)\n", ret); 138 return ret; 139 } 140 141 return resp.port_count; 142 } 143 144 static int cros_usbpd_charger_get_usbpd_num_ports(struct charger_data *charger) 145 { 146 struct ec_response_usb_pd_ports resp; 147 int ret; 148 149 ret = cros_usbpd_charger_ec_command(charger, 0, EC_CMD_USB_PD_PORTS, 150 NULL, 0, &resp, sizeof(resp)); 151 if (ret < 0) { 152 dev_err(charger->dev, 153 "Unable to get the number or ports (err:0x%x)\n", ret); 154 return ret; 155 } 156 157 return resp.num_ports; 158 } 159 160 static int cros_usbpd_charger_get_discovery_info(struct port_data *port) 161 { 162 struct charger_data *charger = port->charger; 163 struct ec_params_usb_pd_discovery_entry resp; 164 struct ec_params_usb_pd_info_request req; 165 int ret; 166 167 req.port = port->port_number; 168 169 ret = cros_usbpd_charger_ec_command(charger, 0, 170 EC_CMD_USB_PD_DISCOVERY, 171 &req, sizeof(req), 172 &resp, sizeof(resp)); 173 if (ret < 0) { 174 dev_err(charger->dev, 175 "Unable to query discovery info (err:0x%x)\n", ret); 176 return ret; 177 } 178 179 dev_dbg(charger->dev, "Port %d: VID = 0x%x, PID=0x%x, PTYPE=0x%x\n", 180 port->port_number, resp.vid, resp.pid, resp.ptype); 181 182 snprintf(port->manufacturer, sizeof(port->manufacturer), "%x", 183 resp.vid); 184 snprintf(port->model_name, sizeof(port->model_name), "%x", resp.pid); 185 186 return 0; 187 } 188 189 static int cros_usbpd_charger_get_power_info(struct port_data *port) 190 { 191 struct charger_data *charger = port->charger; 192 struct ec_response_usb_pd_power_info resp; 193 struct ec_params_usb_pd_power_info req; 194 int last_psy_status, last_psy_usb_type; 195 struct device *dev = charger->dev; 196 int ret; 197 198 req.port = port->port_number; 199 ret = cros_usbpd_charger_ec_command(charger, 0, 200 EC_CMD_USB_PD_POWER_INFO, 201 &req, sizeof(req), 202 &resp, sizeof(resp)); 203 if (ret < 0) { 204 dev_err(dev, "Unable to query PD power info (err:0x%x)\n", ret); 205 return ret; 206 } 207 208 last_psy_status = port->psy_status; 209 last_psy_usb_type = port->psy_usb_type; 210 211 switch (resp.role) { 212 case USB_PD_PORT_POWER_DISCONNECTED: 213 port->psy_status = POWER_SUPPLY_STATUS_NOT_CHARGING; 214 port->psy_online = 0; 215 break; 216 case USB_PD_PORT_POWER_SOURCE: 217 port->psy_status = POWER_SUPPLY_STATUS_NOT_CHARGING; 218 port->psy_online = 0; 219 break; 220 case USB_PD_PORT_POWER_SINK: 221 port->psy_status = POWER_SUPPLY_STATUS_CHARGING; 222 port->psy_online = 1; 223 break; 224 case USB_PD_PORT_POWER_SINK_NOT_CHARGING: 225 port->psy_status = POWER_SUPPLY_STATUS_NOT_CHARGING; 226 port->psy_online = 1; 227 break; 228 default: 229 dev_err(dev, "Unknown role %d\n", resp.role); 230 break; 231 } 232 233 port->psy_voltage_max_design = resp.meas.voltage_max; 234 port->psy_voltage_now = resp.meas.voltage_now; 235 port->psy_current_max = resp.meas.current_max; 236 port->psy_power_max = resp.max_power; 237 238 switch (resp.type) { 239 case USB_CHG_TYPE_BC12_SDP: 240 case USB_CHG_TYPE_VBUS: 241 port->psy_usb_type = POWER_SUPPLY_USB_TYPE_SDP; 242 break; 243 case USB_CHG_TYPE_NONE: 244 /* 245 * For dual-role devices when we are a source, the firmware 246 * reports the type as NONE. Report such chargers as type 247 * USB_PD_DRP. 248 */ 249 if (resp.role == USB_PD_PORT_POWER_SOURCE && resp.dualrole) 250 port->psy_usb_type = POWER_SUPPLY_USB_TYPE_PD_DRP; 251 else 252 port->psy_usb_type = POWER_SUPPLY_USB_TYPE_SDP; 253 break; 254 case USB_CHG_TYPE_OTHER: 255 case USB_CHG_TYPE_PROPRIETARY: 256 port->psy_usb_type = POWER_SUPPLY_USB_TYPE_APPLE_BRICK_ID; 257 break; 258 case USB_CHG_TYPE_C: 259 port->psy_usb_type = POWER_SUPPLY_USB_TYPE_C; 260 break; 261 case USB_CHG_TYPE_BC12_DCP: 262 port->psy_usb_type = POWER_SUPPLY_USB_TYPE_DCP; 263 break; 264 case USB_CHG_TYPE_BC12_CDP: 265 port->psy_usb_type = POWER_SUPPLY_USB_TYPE_CDP; 266 break; 267 case USB_CHG_TYPE_PD: 268 if (resp.dualrole) 269 port->psy_usb_type = POWER_SUPPLY_USB_TYPE_PD_DRP; 270 else 271 port->psy_usb_type = POWER_SUPPLY_USB_TYPE_PD; 272 break; 273 case USB_CHG_TYPE_UNKNOWN: 274 /* 275 * While the EC is trying to determine the type of charger that 276 * has been plugged in, it will report the charger type as 277 * unknown. Additionally since the power capabilities are 278 * unknown, report the max current and voltage as zero. 279 */ 280 port->psy_usb_type = POWER_SUPPLY_USB_TYPE_UNKNOWN; 281 port->psy_voltage_max_design = 0; 282 port->psy_current_max = 0; 283 break; 284 default: 285 dev_err(dev, "Port %d: default case!\n", port->port_number); 286 port->psy_usb_type = POWER_SUPPLY_USB_TYPE_SDP; 287 } 288 289 if (cros_usbpd_charger_port_is_dedicated(port)) 290 port->psy_desc.type = POWER_SUPPLY_TYPE_MAINS; 291 else 292 port->psy_desc.type = POWER_SUPPLY_TYPE_USB; 293 294 dev_dbg(dev, 295 "Port %d: type=%d vmax=%d vnow=%d cmax=%d clim=%d pmax=%d\n", 296 port->port_number, resp.type, resp.meas.voltage_max, 297 resp.meas.voltage_now, resp.meas.current_max, 298 resp.meas.current_lim, resp.max_power); 299 300 /* 301 * If power supply type or status changed, explicitly call 302 * power_supply_changed. This results in udev event getting generated 303 * and allows user mode apps to react quicker instead of waiting for 304 * their next poll of power supply status. 305 */ 306 if (last_psy_usb_type != port->psy_usb_type || 307 last_psy_status != port->psy_status) 308 power_supply_changed(port->psy); 309 310 return 0; 311 } 312 313 static int cros_usbpd_charger_get_port_status(struct port_data *port, 314 bool ratelimit) 315 { 316 int ret; 317 318 if (ratelimit && 319 time_is_after_jiffies(port->last_update + 320 CHARGER_CACHE_UPDATE_DELAY)) 321 return 0; 322 323 ret = cros_usbpd_charger_get_power_info(port); 324 if (ret < 0) 325 return ret; 326 327 if (!cros_usbpd_charger_port_is_dedicated(port)) 328 ret = cros_usbpd_charger_get_discovery_info(port); 329 port->last_update = jiffies; 330 331 return ret; 332 } 333 334 static int cros_usbpd_charger_set_ext_power_limit(struct charger_data *charger, 335 u16 current_lim, 336 u16 voltage_lim) 337 { 338 struct ec_params_external_power_limit_v1 req; 339 int ret; 340 341 req.current_lim = current_lim; 342 req.voltage_lim = voltage_lim; 343 344 ret = cros_usbpd_charger_ec_command(charger, 0, 345 EC_CMD_EXTERNAL_POWER_LIMIT, 346 &req, sizeof(req), NULL, 0); 347 if (ret < 0) 348 dev_err(charger->dev, 349 "Unable to set the 'External Power Limit': %d\n", ret); 350 351 return ret; 352 } 353 354 static void cros_usbpd_charger_power_changed(struct power_supply *psy) 355 { 356 struct port_data *port = power_supply_get_drvdata(psy); 357 struct charger_data *charger = port->charger; 358 int i; 359 360 for (i = 0; i < charger->num_registered_psy; i++) 361 cros_usbpd_charger_get_port_status(charger->ports[i], false); 362 } 363 364 static int cros_usbpd_charger_get_prop(struct power_supply *psy, 365 enum power_supply_property psp, 366 union power_supply_propval *val) 367 { 368 struct port_data *port = power_supply_get_drvdata(psy); 369 struct charger_data *charger = port->charger; 370 struct cros_ec_device *ec_device = charger->ec_device; 371 struct device *dev = charger->dev; 372 int ret; 373 374 /* Only refresh ec_port_status for dynamic properties */ 375 switch (psp) { 376 case POWER_SUPPLY_PROP_ONLINE: 377 /* 378 * If mkbp_event_supported, then we can be assured that 379 * the driver's state for the online property is consistent 380 * with the hardware. However, if we aren't event driven, 381 * the optimization before to skip an ec_port_status get 382 * and only returned cached values of the online property will 383 * cause a delay in detecting a cable attach until one of the 384 * other properties are read. 385 * 386 * Allow an ec_port_status refresh for online property check 387 * if we're not already online to check for plug events if 388 * not mkbp_event_supported. 389 */ 390 if (ec_device->mkbp_event_supported || port->psy_online) 391 break; 392 /* fall through */ 393 case POWER_SUPPLY_PROP_CURRENT_MAX: 394 case POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN: 395 case POWER_SUPPLY_PROP_VOLTAGE_NOW: 396 ret = cros_usbpd_charger_get_port_status(port, true); 397 if (ret < 0) { 398 dev_err(dev, "Failed to get port status (err:0x%x)\n", 399 ret); 400 return -EINVAL; 401 } 402 break; 403 default: 404 break; 405 } 406 407 switch (psp) { 408 case POWER_SUPPLY_PROP_ONLINE: 409 val->intval = port->psy_online; 410 break; 411 case POWER_SUPPLY_PROP_STATUS: 412 val->intval = port->psy_status; 413 break; 414 case POWER_SUPPLY_PROP_CURRENT_MAX: 415 val->intval = port->psy_current_max * 1000; 416 break; 417 case POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN: 418 val->intval = port->psy_voltage_max_design * 1000; 419 break; 420 case POWER_SUPPLY_PROP_VOLTAGE_NOW: 421 val->intval = port->psy_voltage_now * 1000; 422 break; 423 case POWER_SUPPLY_PROP_USB_TYPE: 424 val->intval = port->psy_usb_type; 425 break; 426 case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT: 427 if (input_current_limit == EC_POWER_LIMIT_NONE) 428 val->intval = -1; 429 else 430 val->intval = input_current_limit * 1000; 431 break; 432 case POWER_SUPPLY_PROP_INPUT_VOLTAGE_LIMIT: 433 if (input_voltage_limit == EC_POWER_LIMIT_NONE) 434 val->intval = -1; 435 else 436 val->intval = input_voltage_limit * 1000; 437 break; 438 case POWER_SUPPLY_PROP_MODEL_NAME: 439 val->strval = port->model_name; 440 break; 441 case POWER_SUPPLY_PROP_MANUFACTURER: 442 val->strval = port->manufacturer; 443 break; 444 default: 445 return -EINVAL; 446 } 447 448 return 0; 449 } 450 451 static int cros_usbpd_charger_set_prop(struct power_supply *psy, 452 enum power_supply_property psp, 453 const union power_supply_propval *val) 454 { 455 struct port_data *port = power_supply_get_drvdata(psy); 456 struct charger_data *charger = port->charger; 457 struct device *dev = charger->dev; 458 u16 intval; 459 int ret; 460 461 /* U16_MAX in mV/mA is the maximum supported value */ 462 if (val->intval >= U16_MAX * 1000) 463 return -EINVAL; 464 /* A negative number is used to clear the limit */ 465 if (val->intval < 0) 466 intval = EC_POWER_LIMIT_NONE; 467 else /* Convert from uA/uV to mA/mV */ 468 intval = val->intval / 1000; 469 470 switch (psp) { 471 case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT: 472 ret = cros_usbpd_charger_set_ext_power_limit(charger, intval, 473 input_voltage_limit); 474 if (ret < 0) 475 break; 476 477 input_current_limit = intval; 478 if (input_current_limit == EC_POWER_LIMIT_NONE) 479 dev_info(dev, 480 "External Current Limit cleared for all ports\n"); 481 else 482 dev_info(dev, 483 "External Current Limit set to %dmA for all ports\n", 484 input_current_limit); 485 break; 486 case POWER_SUPPLY_PROP_INPUT_VOLTAGE_LIMIT: 487 ret = cros_usbpd_charger_set_ext_power_limit(charger, 488 input_current_limit, 489 intval); 490 if (ret < 0) 491 break; 492 493 input_voltage_limit = intval; 494 if (input_voltage_limit == EC_POWER_LIMIT_NONE) 495 dev_info(dev, 496 "External Voltage Limit cleared for all ports\n"); 497 else 498 dev_info(dev, 499 "External Voltage Limit set to %dmV for all ports\n", 500 input_voltage_limit); 501 break; 502 default: 503 ret = -EINVAL; 504 } 505 506 return ret; 507 } 508 509 static int cros_usbpd_charger_property_is_writeable(struct power_supply *psy, 510 enum power_supply_property psp) 511 { 512 int ret; 513 514 switch (psp) { 515 case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT: 516 case POWER_SUPPLY_PROP_INPUT_VOLTAGE_LIMIT: 517 ret = 1; 518 break; 519 default: 520 ret = 0; 521 } 522 523 return ret; 524 } 525 526 static int cros_usbpd_charger_ec_event(struct notifier_block *nb, 527 unsigned long queued_during_suspend, 528 void *_notify) 529 { 530 struct cros_ec_device *ec_device; 531 struct charger_data *charger; 532 u32 host_event; 533 534 charger = container_of(nb, struct charger_data, notifier); 535 ec_device = charger->ec_device; 536 537 host_event = cros_ec_get_host_event(ec_device); 538 if (host_event & EC_HOST_EVENT_MASK(EC_HOST_EVENT_PD_MCU)) { 539 cros_usbpd_charger_power_changed(charger->ports[0]->psy); 540 return NOTIFY_OK; 541 } else { 542 return NOTIFY_DONE; 543 } 544 } 545 546 static void cros_usbpd_charger_unregister_notifier(void *data) 547 { 548 struct charger_data *charger = data; 549 struct cros_ec_device *ec_device = charger->ec_device; 550 551 blocking_notifier_chain_unregister(&ec_device->event_notifier, 552 &charger->notifier); 553 } 554 555 static int cros_usbpd_charger_probe(struct platform_device *pd) 556 { 557 struct cros_ec_dev *ec_dev = dev_get_drvdata(pd->dev.parent); 558 struct cros_ec_device *ec_device = ec_dev->ec_dev; 559 struct power_supply_desc *psy_desc; 560 struct device *dev = &pd->dev; 561 struct charger_data *charger; 562 struct power_supply *psy; 563 struct port_data *port; 564 int ret = -EINVAL; 565 int i; 566 567 charger = devm_kzalloc(dev, sizeof(struct charger_data), 568 GFP_KERNEL); 569 if (!charger) 570 return -ENOMEM; 571 572 charger->dev = dev; 573 charger->ec_dev = ec_dev; 574 charger->ec_device = ec_device; 575 576 platform_set_drvdata(pd, charger); 577 578 /* 579 * We need to know the number of USB PD ports in order to know whether 580 * there is a dedicated port. The dedicated port will always be 581 * after the USB PD ports, and there should be only one. 582 */ 583 charger->num_usbpd_ports = 584 cros_usbpd_charger_get_usbpd_num_ports(charger); 585 if (charger->num_usbpd_ports <= 0) { 586 /* 587 * This can happen on a system that doesn't support USB PD. 588 * Log a message, but no need to warn. 589 */ 590 dev_info(dev, "No USB PD charging ports found\n"); 591 } 592 593 charger->num_charger_ports = cros_usbpd_charger_get_num_ports(charger); 594 if (charger->num_charger_ports < 0) { 595 /* 596 * This can happen on a system that doesn't support USB PD. 597 * Log a message, but no need to warn. 598 * Older ECs do not support the above command, in that case 599 * let's set up the number of charger ports equal to the number 600 * of USB PD ports 601 */ 602 dev_info(dev, "Could not get charger port count\n"); 603 charger->num_charger_ports = charger->num_usbpd_ports; 604 } 605 606 if (charger->num_charger_ports <= 0) { 607 /* 608 * This can happen on a system that doesn't support USB PD and 609 * doesn't have a dedicated port. 610 * Log a message, but no need to warn. 611 */ 612 dev_info(dev, "No charging ports found\n"); 613 ret = -ENODEV; 614 goto fail_nowarn; 615 } 616 617 /* 618 * Sanity checks on the number of ports: 619 * there should be at most 1 dedicated port 620 */ 621 if (charger->num_charger_ports < charger->num_usbpd_ports || 622 charger->num_charger_ports > (charger->num_usbpd_ports + 1)) { 623 dev_err(dev, "Unexpected number of charge port count\n"); 624 ret = -EPROTO; 625 goto fail_nowarn; 626 } 627 628 for (i = 0; i < charger->num_charger_ports; i++) { 629 struct power_supply_config psy_cfg = {}; 630 631 port = devm_kzalloc(dev, sizeof(struct port_data), GFP_KERNEL); 632 if (!port) { 633 ret = -ENOMEM; 634 goto fail; 635 } 636 637 port->charger = charger; 638 port->port_number = i; 639 640 psy_desc = &port->psy_desc; 641 psy_desc->get_property = cros_usbpd_charger_get_prop; 642 psy_desc->set_property = cros_usbpd_charger_set_prop; 643 psy_desc->property_is_writeable = 644 cros_usbpd_charger_property_is_writeable; 645 psy_desc->external_power_changed = 646 cros_usbpd_charger_power_changed; 647 psy_cfg.drv_data = port; 648 649 if (cros_usbpd_charger_port_is_dedicated(port)) { 650 sprintf(port->name, CHARGER_DEDICATED_DIR_NAME); 651 psy_desc->type = POWER_SUPPLY_TYPE_MAINS; 652 psy_desc->properties = 653 cros_usbpd_dedicated_charger_props; 654 psy_desc->num_properties = 655 ARRAY_SIZE(cros_usbpd_dedicated_charger_props); 656 } else { 657 sprintf(port->name, CHARGER_USBPD_DIR_NAME, i); 658 psy_desc->type = POWER_SUPPLY_TYPE_USB; 659 psy_desc->properties = cros_usbpd_charger_props; 660 psy_desc->num_properties = 661 ARRAY_SIZE(cros_usbpd_charger_props); 662 psy_desc->usb_types = cros_usbpd_charger_usb_types; 663 psy_desc->num_usb_types = 664 ARRAY_SIZE(cros_usbpd_charger_usb_types); 665 } 666 667 psy_desc->name = port->name; 668 669 psy = devm_power_supply_register_no_ws(dev, psy_desc, 670 &psy_cfg); 671 if (IS_ERR(psy)) { 672 dev_err(dev, "Failed to register power supply\n"); 673 continue; 674 } 675 port->psy = psy; 676 677 charger->ports[charger->num_registered_psy++] = port; 678 } 679 680 if (!charger->num_registered_psy) { 681 ret = -ENODEV; 682 dev_err(dev, "No power supplies registered\n"); 683 goto fail; 684 } 685 686 if (ec_device->mkbp_event_supported) { 687 /* Get PD events from the EC */ 688 charger->notifier.notifier_call = cros_usbpd_charger_ec_event; 689 ret = blocking_notifier_chain_register( 690 &ec_device->event_notifier, 691 &charger->notifier); 692 if (ret < 0) { 693 dev_warn(dev, "failed to register notifier\n"); 694 } else { 695 ret = devm_add_action_or_reset(dev, 696 cros_usbpd_charger_unregister_notifier, 697 charger); 698 if (ret < 0) 699 goto fail; 700 } 701 } 702 703 return 0; 704 705 fail: 706 WARN(1, "%s: Failing probe (err:0x%x)\n", dev_name(dev), ret); 707 708 fail_nowarn: 709 dev_info(dev, "Failing probe (err:0x%x)\n", ret); 710 return ret; 711 } 712 713 #ifdef CONFIG_PM_SLEEP 714 static int cros_usbpd_charger_resume(struct device *dev) 715 { 716 struct charger_data *charger = dev_get_drvdata(dev); 717 int i; 718 719 if (!charger) 720 return 0; 721 722 for (i = 0; i < charger->num_registered_psy; i++) { 723 power_supply_changed(charger->ports[i]->psy); 724 charger->ports[i]->last_update = 725 jiffies - CHARGER_CACHE_UPDATE_DELAY; 726 } 727 728 return 0; 729 } 730 #endif 731 732 static SIMPLE_DEV_PM_OPS(cros_usbpd_charger_pm_ops, NULL, 733 cros_usbpd_charger_resume); 734 735 static struct platform_driver cros_usbpd_charger_driver = { 736 .driver = { 737 .name = DRV_NAME, 738 .pm = &cros_usbpd_charger_pm_ops, 739 }, 740 .probe = cros_usbpd_charger_probe 741 }; 742 743 module_platform_driver(cros_usbpd_charger_driver); 744 745 MODULE_LICENSE("GPL"); 746 MODULE_DESCRIPTION("ChromeOS EC USBPD charger"); 747 MODULE_ALIAS("platform:" DRV_NAME); 748