cros_usbpd-charger.c

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