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