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