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
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 /* Input voltage/current limit in mV/mA. Default to none. */
76 static u16 input_voltage_limit = EC_POWER_LIMIT_NONE;
77 static u16 input_current_limit = EC_POWER_LIMIT_NONE;
78
cros_usbpd_charger_port_is_dedicated(struct port_data * port)79 static bool cros_usbpd_charger_port_is_dedicated(struct port_data *port)
80 {
81 return port->port_number >= port->charger->num_usbpd_ports;
82 }
83
cros_usbpd_charger_ec_command(struct charger_data * charger,unsigned int version,unsigned int command,void * outdata,unsigned int outsize,void * indata,unsigned int insize)84 static int cros_usbpd_charger_ec_command(struct charger_data *charger,
85 unsigned int version,
86 unsigned int command,
87 void *outdata,
88 unsigned int outsize,
89 void *indata,
90 unsigned int insize)
91 {
92 struct cros_ec_dev *ec_dev = charger->ec_dev;
93 struct cros_ec_command *msg;
94 int ret;
95
96 msg = kzalloc_flex(*msg, data, max(outsize, insize));
97 if (!msg)
98 return -ENOMEM;
99
100 msg->version = version;
101 msg->command = ec_dev->cmd_offset + command;
102 msg->outsize = outsize;
103 msg->insize = insize;
104
105 if (outsize)
106 memcpy(msg->data, outdata, outsize);
107
108 ret = cros_ec_cmd_xfer_status(charger->ec_device, msg);
109 if (ret >= 0 && insize)
110 memcpy(indata, msg->data, insize);
111
112 kfree(msg);
113 return ret;
114 }
115
cros_usbpd_charger_get_num_ports(struct charger_data * charger)116 static int cros_usbpd_charger_get_num_ports(struct charger_data *charger)
117 {
118 struct ec_response_charge_port_count resp;
119 int ret;
120
121 ret = cros_usbpd_charger_ec_command(charger, 0,
122 EC_CMD_CHARGE_PORT_COUNT,
123 NULL, 0, &resp, sizeof(resp));
124 if (ret < 0)
125 return ret;
126
127 if (resp.port_count > EC_USB_PD_MAX_PORTS) {
128 dev_warn(charger->dev, "Charge port count out of bounds\n");
129 return EC_USB_PD_MAX_PORTS;
130 }
131
132 return resp.port_count;
133 }
134
cros_usbpd_charger_get_usbpd_num_ports(struct charger_data * charger)135 static int cros_usbpd_charger_get_usbpd_num_ports(struct charger_data *charger)
136 {
137 struct ec_response_usb_pd_ports resp;
138 int ret;
139
140 ret = cros_usbpd_charger_ec_command(charger, 0, EC_CMD_USB_PD_PORTS,
141 NULL, 0, &resp, sizeof(resp));
142 if (ret < 0)
143 return ret;
144
145 if (resp.num_ports > EC_USB_PD_MAX_PORTS) {
146 dev_warn(charger->dev, "USB PD port count out of bounds\n");
147 return EC_USB_PD_MAX_PORTS;
148 }
149
150 return resp.num_ports;
151 }
152
cros_usbpd_charger_get_discovery_info(struct port_data * port)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
cros_usbpd_charger_get_power_info(struct port_data * port)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_dbg(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
cros_usbpd_charger_get_port_status(struct port_data * port,bool ratelimit)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
cros_usbpd_charger_set_ext_power_limit(struct charger_data * charger,u16 current_lim,u16 voltage_lim)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
cros_usbpd_charger_power_changed(struct power_supply * psy)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
cros_usbpd_charger_get_prop(struct power_supply * psy,enum power_supply_property psp,union power_supply_propval * val)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 fallthrough;
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
cros_usbpd_charger_set_prop(struct power_supply * psy,enum power_supply_property psp,const union power_supply_propval * val)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
cros_usbpd_charger_property_is_writeable(struct power_supply * psy,enum power_supply_property psp)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
cros_usbpd_charger_ec_event(struct notifier_block * nb,unsigned long host_event,void * _notify)519 static int cros_usbpd_charger_ec_event(struct notifier_block *nb,
520 unsigned long host_event,
521 void *_notify)
522 {
523 struct charger_data *charger = container_of(nb, struct charger_data,
524 notifier);
525
526 cros_usbpd_charger_power_changed(charger->ports[0]->psy);
527 return NOTIFY_OK;
528 }
529
cros_usbpd_charger_unregister_notifier(void * data)530 static void cros_usbpd_charger_unregister_notifier(void *data)
531 {
532 struct charger_data *charger = data;
533
534 cros_usbpd_unregister_notify(&charger->notifier);
535 }
536
cros_usbpd_charger_probe(struct platform_device * pd)537 static int cros_usbpd_charger_probe(struct platform_device *pd)
538 {
539 struct cros_ec_dev *ec_dev = dev_get_drvdata(pd->dev.parent);
540 struct cros_ec_device *ec_device = ec_dev->ec_dev;
541 struct power_supply_desc *psy_desc;
542 struct device *dev = &pd->dev;
543 struct charger_data *charger;
544 struct power_supply *psy;
545 struct port_data *port;
546 int ret = -EINVAL;
547 int i;
548
549 charger = devm_kzalloc(dev, sizeof(struct charger_data),
550 GFP_KERNEL);
551 if (!charger)
552 return -ENOMEM;
553
554 charger->dev = dev;
555 charger->ec_dev = ec_dev;
556 charger->ec_device = ec_device;
557
558 platform_set_drvdata(pd, charger);
559
560 /*
561 * We need to know the number of USB PD ports in order to know whether
562 * there is a dedicated port. The dedicated port will always be
563 * after the USB PD ports, and there should be only one.
564 */
565 charger->num_usbpd_ports =
566 cros_usbpd_charger_get_usbpd_num_ports(charger);
567 if (charger->num_usbpd_ports <= 0) {
568 /*
569 * This can happen on a system that doesn't support USB PD.
570 * Log a message, but no need to warn.
571 */
572 dev_info(dev, "No USB PD charging ports found\n");
573 }
574
575 charger->num_charger_ports = cros_usbpd_charger_get_num_ports(charger);
576 if (charger->num_charger_ports < 0) {
577 /*
578 * This can happen on a system that doesn't support USB PD.
579 * Log a message, but no need to warn.
580 * Older ECs do not support the above command, in that case
581 * let's set up the number of charger ports equal to the number
582 * of USB PD ports
583 */
584 dev_info(dev, "Could not get charger port count\n");
585 charger->num_charger_ports = charger->num_usbpd_ports;
586 }
587
588 if (charger->num_charger_ports <= 0) {
589 /*
590 * This can happen on a system that doesn't support USB PD and
591 * doesn't have a dedicated port.
592 * Log a message, but no need to warn.
593 */
594 dev_info(dev, "No charging ports found\n");
595 ret = -ENODEV;
596 goto fail_nowarn;
597 }
598
599 /*
600 * Sanity checks on the number of ports:
601 * there should be at most 1 dedicated port, and the count must
602 * not exceed the maximum number of supported ports
603 * (EC_USB_PD_MAX_PORTS).
604 */
605 if (charger->num_charger_ports < charger->num_usbpd_ports ||
606 charger->num_charger_ports > (charger->num_usbpd_ports + 1) ||
607 charger->num_charger_ports > EC_USB_PD_MAX_PORTS) {
608 dev_err(dev, "Unexpected number of charge port count\n");
609 ret = -EPROTO;
610 goto fail_nowarn;
611 }
612
613 for (i = 0; i < charger->num_charger_ports; i++) {
614 struct power_supply_config psy_cfg = {};
615
616 port = devm_kzalloc(dev, sizeof(struct port_data), GFP_KERNEL);
617 if (!port) {
618 ret = -ENOMEM;
619 goto fail;
620 }
621
622 port->charger = charger;
623 port->port_number = i;
624
625 psy_desc = &port->psy_desc;
626 psy_desc->get_property = cros_usbpd_charger_get_prop;
627 psy_desc->set_property = cros_usbpd_charger_set_prop;
628 psy_desc->property_is_writeable =
629 cros_usbpd_charger_property_is_writeable;
630 psy_desc->external_power_changed =
631 cros_usbpd_charger_power_changed;
632 psy_cfg.drv_data = port;
633 psy_cfg.no_wakeup_source = true;
634
635 if (cros_usbpd_charger_port_is_dedicated(port)) {
636 sprintf(port->name, CHARGER_DEDICATED_DIR_NAME);
637 psy_desc->type = POWER_SUPPLY_TYPE_MAINS;
638 psy_desc->properties =
639 cros_usbpd_dedicated_charger_props;
640 psy_desc->num_properties =
641 ARRAY_SIZE(cros_usbpd_dedicated_charger_props);
642 } else {
643 sprintf(port->name, CHARGER_USBPD_DIR_NAME, i);
644 psy_desc->type = POWER_SUPPLY_TYPE_USB;
645 psy_desc->properties = cros_usbpd_charger_props;
646 psy_desc->num_properties =
647 ARRAY_SIZE(cros_usbpd_charger_props);
648 psy_desc->usb_types = BIT(POWER_SUPPLY_USB_TYPE_UNKNOWN) |
649 BIT(POWER_SUPPLY_USB_TYPE_SDP) |
650 BIT(POWER_SUPPLY_USB_TYPE_DCP) |
651 BIT(POWER_SUPPLY_USB_TYPE_CDP) |
652 BIT(POWER_SUPPLY_USB_TYPE_C) |
653 BIT(POWER_SUPPLY_USB_TYPE_PD) |
654 BIT(POWER_SUPPLY_USB_TYPE_PD_DRP) |
655 BIT(POWER_SUPPLY_USB_TYPE_APPLE_BRICK_ID);
656 }
657
658 psy_desc->name = port->name;
659
660 psy = devm_power_supply_register(dev, psy_desc, &psy_cfg);
661 if (IS_ERR(psy)) {
662 dev_err(dev, "Failed to register power supply\n");
663 continue;
664 }
665 port->psy = psy;
666
667 charger->ports[charger->num_registered_psy++] = port;
668 }
669
670 if (!charger->num_registered_psy) {
671 ret = -ENODEV;
672 dev_err(dev, "No power supplies registered\n");
673 goto fail;
674 }
675
676 /* Get PD events from the EC */
677 charger->notifier.notifier_call = cros_usbpd_charger_ec_event;
678 ret = cros_usbpd_register_notify(&charger->notifier);
679 if (ret < 0) {
680 dev_warn(dev, "failed to register notifier\n");
681 } else {
682 ret = devm_add_action_or_reset(dev,
683 cros_usbpd_charger_unregister_notifier,
684 charger);
685 if (ret < 0)
686 goto fail;
687 }
688
689 return 0;
690
691 fail:
692 WARN(1, "%s: Failing probe (err:0x%x)\n", dev_name(dev), ret);
693
694 fail_nowarn:
695 dev_info(dev, "Failing probe (err:0x%x)\n", ret);
696 return ret;
697 }
698
699 #ifdef CONFIG_PM_SLEEP
cros_usbpd_charger_resume(struct device * dev)700 static int cros_usbpd_charger_resume(struct device *dev)
701 {
702 struct charger_data *charger = dev_get_drvdata(dev);
703 int i;
704
705 if (!charger)
706 return 0;
707
708 for (i = 0; i < charger->num_registered_psy; i++) {
709 power_supply_changed(charger->ports[i]->psy);
710 charger->ports[i]->last_update =
711 jiffies - CHARGER_CACHE_UPDATE_DELAY;
712 }
713
714 return 0;
715 }
716 #endif
717
718 static SIMPLE_DEV_PM_OPS(cros_usbpd_charger_pm_ops, NULL,
719 cros_usbpd_charger_resume);
720
721 static const struct platform_device_id cros_usbpd_charger_id[] = {
722 { .name = DRV_NAME },
723 { }
724 };
725 MODULE_DEVICE_TABLE(platform, cros_usbpd_charger_id);
726
727 static struct platform_driver cros_usbpd_charger_driver = {
728 .driver = {
729 .name = DRV_NAME,
730 .pm = &cros_usbpd_charger_pm_ops,
731 },
732 .probe = cros_usbpd_charger_probe,
733 .id_table = cros_usbpd_charger_id,
734 };
735
736 module_platform_driver(cros_usbpd_charger_driver);
737
738 MODULE_LICENSE("GPL");
739 MODULE_DESCRIPTION("ChromeOS EC USBPD charger");
740