1 // SPDX-License-Identifier: GPL-2.0
7  * Authors: Shunqing Chen <csq@rock-chips.com>
73 	struct power_supply_battery_info battery;  member
102 	ret = regmap_bulk_read(cw_bat->regmap, reg, &value, sizeof(value));  in cw_read_word()
114 	regmap_write(cw_bat->regmap, CW2017_REG_MODE_CONFIG, reg_val);  in cw2017_enable()
117 	regmap_write(cw_bat->regmap, CW2017_REG_MODE_CONFIG, reg_val);  in cw2017_enable()
120 	regmap_write(cw_bat->regmap, CW2017_REG_MODE_CONFIG, reg_val);  in cw2017_enable()
130 	/* write new battery info */  in cw_update_profile()
131 	ret = regmap_raw_write(cw_bat->regmap, CW2017_REG_BATINFO,  in cw_update_profile()
132 			       cw_bat->bat_profile,  in cw_update_profile()
140 	reg_val |= cw_bat->alert_level;  in cw_update_profile()
141 	regmap_write(cw_bat->regmap, CW2017_REG_SOC_ALERT, reg_val);  in cw_update_profile()
143 	if (cw_bat->alert_level)  in cw_update_profile()
146 	cw_bat->temp_max = TEMP_MAX_ALERT;  in cw_update_profile()
147 	cw_bat->temp_min = TEMP_MIN_ALERT;  in cw_update_profile()
148 	if (cw_bat->temp_max != TEMP_ALERT_DISABLE) {  in cw_update_profile()
150 		reg_val = (cw_bat->temp_max + 40) * 2;  in cw_update_profile()
151 		regmap_write(cw_bat->regmap, CW2017_REG_TEMP_MAX, reg_val);  in cw_update_profile()
153 	if (cw_bat->temp_min != TEMP_ALERT_DISABLE) {  in cw_update_profile()
155 		reg_val = (cw_bat->temp_min + 40) * 2;  in cw_update_profile()
156 		regmap_write(cw_bat->regmap, CW2017_REG_TEMP_MIN, reg_val);  in cw_update_profile()
158 	regmap_write(cw_bat->regmap, CW2017_REG_INT_CONFIG, int_mask);  in cw_update_profile()
164 	ret = regmap_read_poll_timeout(cw_bat->regmap, CW2017_REG_SOC_INT,  in cw_update_profile()
168 		dev_err(cw_bat->dev,  in cw_update_profile()
169 			"Gauge did not become ready after profile upload\n");  in cw_update_profile()
171 		dev_dbg(cw_bat->dev, "Battery profile updated\n");  in cw_update_profile()
174 	dev_dbg(cw_bat->dev, "Battery profile configured\n");  in cw_update_profile()
185 	regmap_read(cw_bat->regmap, CW2017_REG_MODE_CONFIG, &reg_val);  in cw_init()
186 	regmap_read(cw_bat->regmap, CW2017_REG_SOC_ALERT, &config_flg);  in cw_init()
189 		dev_dbg(cw_bat->dev,  in cw_init()
190 			"Battery profile not present, uploading battery profile\n");  in cw_init()
191 		if (cw_bat->bat_profile) {  in cw_init()
194 				dev_err(cw_bat->dev,  in cw_init()
195 					"Failed to upload battery profile\n");  in cw_init()
199 			dev_warn(cw_bat->dev,  in cw_init()
200 				 "No profile specified, continuing without profile\n");  in cw_init()
202 	} else if (cw_bat->bat_profile) {  in cw_init()
205 		ret = regmap_raw_read(cw_bat->regmap, CW2017_REG_BATINFO,  in cw_init()
208 			dev_err(cw_bat->dev,  in cw_init()
209 				"Failed to read stored battery profile\n");  in cw_init()
213 		if (memcmp(bat_info, cw_bat->bat_profile, CW2017_SIZE_BATINFO)) {  in cw_init()
214 			dev_warn(cw_bat->dev, "Replacing stored battery profile\n");  in cw_init()
220 		dev_warn(cw_bat->dev,  in cw_init()
221 			 "Can't check current battery profile, no profile provided\n");  in cw_init()
228 	(((current) < (previous) + (up)) && ((current) > (previous) - (down)))
234 	regmap_read(cw_bat->regmap, CW2017_REG_SOC_INT, &soc);  in cw_get_soc()
237 			CW2017_BAT_SOC_ERROR_MS / cw_bat->poll_interval_ms;  in cw_get_soc()
239 		dev_err(cw_bat->dev, "Invalid SoC %d%%\n", soc);  in cw_get_soc()
240 		cw_bat->read_errors++;  in cw_get_soc()
241 		if (cw_bat->read_errors > max_error_cycles) {  in cw_get_soc()
242 			dev_warn(cw_bat->dev,  in cw_get_soc()
244 			cw_bat->read_errors = 0;  in cw_get_soc()
246 		return cw_bat->soc;  in cw_get_soc()
248 	cw_bat->read_errors = 0;  in cw_get_soc()
251 	if (cw_bat->status == POWER_SUPPLY_STATUS_CHARGING && soc == cw_bat->soc) {  in cw_get_soc()
253 			CW2017_BAT_CHARGING_STUCK_MS / cw_bat->poll_interval_ms;  in cw_get_soc()
255 		cw_bat->charge_stuck_cnt++;  in cw_get_soc()
256 		if (cw_bat->charge_stuck_cnt > max_stuck_cycles) {  in cw_get_soc()
257 			dev_warn(cw_bat->dev,  in cw_get_soc()
259 			cw_bat->charge_stuck_cnt = 0;  in cw_get_soc()
262 		cw_bat->charge_stuck_cnt = 0;  in cw_get_soc()
266 	if (cw_bat->charger_attached && HYSTERESIS(soc, cw_bat->soc, 0, 3))  in cw_get_soc()
267 		soc = cw_bat->soc;  in cw_get_soc()
270 	if (!cw_bat->charger_attached && HYSTERESIS(soc, cw_bat->soc, 3, 0))  in cw_get_soc()
271 		soc = cw_bat->soc;  in cw_get_soc()
284 	if (cw_bat->dual_cell)  in cw_get_voltage()
287 	dev_dbg(cw_bat->dev, "Read voltage: %d mV, raw=0x%04x\n",  in cw_get_voltage()
297 	ret = power_supply_am_i_supplied(cw_bat->rk_bat);  in cw_update_charge_status()
299 		dev_warn(cw_bat->dev, "Failed to get supply state: %d\n", ret);  in cw_update_charge_status()
304 		if (cw_bat->charger_attached != charger_attached) {  in cw_update_charge_status()
305 			cw_bat->battery_changed = true;  in cw_update_charge_status()
307 				cw_bat->charge_count++;  in cw_update_charge_status()
309 		cw_bat->charger_attached = charger_attached;  in cw_update_charge_status()
319 		dev_err(cw_bat->dev, "Failed to get SoC from gauge: %d\n", soc);  in cw_update_soc()
320 	else if (cw_bat->soc != soc) {  in cw_update_soc()
321 		cw_bat->soc = soc;  in cw_update_soc()
322 		cw_bat->battery_changed = true;  in cw_update_soc()
332 		dev_err(cw_bat->dev, "Failed to get voltage from gauge: %d\n",  in cw_update_voltage()
335 		cw_bat->voltage_mv = voltage_mv;  in cw_update_voltage()
342 	regmap_read(cw_bat->regmap, CW2017_REG_TEMP, &val);  in cw_update_temp()
343 	cw_bat->temp = val * 10 / 2 - 400;  in cw_update_temp()
345 	return cw_bat->temp;  in cw_update_temp()
352 	if (cw_bat->charger_attached) {  in cw_update_status()
353 		if (cw_bat->soc >= 100)  in cw_update_status()
359 	if (cw_bat->status != status)  in cw_update_status()
360 		cw_bat->battery_changed = true;  in cw_update_status()
361 	cw_bat->status = status;  in cw_update_status()
378 	dev_dbg(cw_bat->dev, "charger_attached = %d\n", cw_bat->charger_attached);  in cw_bat_work()
379 	dev_dbg(cw_bat->dev, "status = %d\n", cw_bat->status);  in cw_bat_work()
380 	dev_dbg(cw_bat->dev, "soc = %d%%\n", cw_bat->soc);  in cw_bat_work()
381 	dev_dbg(cw_bat->dev, "voltage = %dmV\n", cw_bat->voltage_mv);  in cw_bat_work()
383 	if (cw_bat->battery_changed)  in cw_bat_work()
384 		power_supply_changed(cw_bat->rk_bat);  in cw_bat_work()
385 	cw_bat->battery_changed = false;  in cw_bat_work()
387 	queue_delayed_work(cw_bat->battery_workqueue,  in cw_bat_work()
388 			   &cw_bat->battery_delay_work,  in cw_bat_work()
389 			   msecs_to_jiffies(cw_bat->poll_interval_ms));  in cw_bat_work()
401 		val->intval = cw_bat->soc;  in cw_battery_get_property()
405 		val->intval = cw_bat->status;  in cw_battery_get_property()
409 		val->intval = !!cw_bat->voltage_mv;  in cw_battery_get_property()
413 		val->intval = cw_bat->voltage_mv * 1000;  in cw_battery_get_property()
417 		val->intval = 0;  in cw_battery_get_property()
421 		val->intval = POWER_SUPPLY_TECHNOLOGY_LION;  in cw_battery_get_property()
425 		val->intval = cw_bat->charge_count;  in cw_battery_get_property()
429 		val->intval = cw_bat->temp;  in cw_battery_get_property()
434 		if (cw_bat->battery.charge_full_design_uah > 0)  in cw_battery_get_property()
435 			val->intval = cw_bat->battery.charge_full_design_uah;  in cw_battery_get_property()
437 			val->intval = cw_bat->design_capacity * 1000;  in cw_battery_get_property()
441 		val->intval = 0;  in cw_battery_get_property()
465 	.name		= "cw2017-battery",
474 	struct device *dev = cw_bat->dev;  in cw2017_parse_properties()
478 	length = device_property_count_u8(dev, "cellwise,battery-profile");  in cw2017_parse_properties()
480 		dev_warn(cw_bat->dev,  in cw2017_parse_properties()
481 			 "No battery-profile found, using current flash contents\n");  in cw2017_parse_properties()
483 		dev_err(cw_bat->dev, "battery-profile must be %d bytes\n",  in cw2017_parse_properties()
485 		return -EINVAL;  in cw2017_parse_properties()
488 	cw_bat->bat_profile = devm_kzalloc(dev, length, GFP_KERNEL);  in cw2017_parse_properties()
489 	if (!cw_bat->bat_profile)  in cw2017_parse_properties()
490 		return -ENOMEM;  in cw2017_parse_properties()
493 					    "cellwise,battery-profile",  in cw2017_parse_properties()
494 					    cw_bat->bat_profile,  in cw2017_parse_properties()
499 	ret = device_property_read_u32(dev, "cellwise,design-capacity-amh",  in cw2017_parse_properties()
500 				       &cw_bat->design_capacity);  in cw2017_parse_properties()
502 		dev_info(cw_bat->dev, "Missing design capacity\n");  in cw2017_parse_properties()
503 		cw_bat->design_capacity = DEF_DESIGN_CAPACITY;  in cw2017_parse_properties()
506 	device_property_read_u32(dev, "cellwise,alert-level",  in cw2017_parse_properties()
507 				 &cw_bat->alert_level);  in cw2017_parse_properties()
509 	cw_bat->dual_cell = device_property_read_bool(dev, "cellwise,dual-cell");  in cw2017_parse_properties()
511 	ret = device_property_read_u32(dev, "cellwise,monitor-interval-ms",  in cw2017_parse_properties()
512 				       &cw_bat->poll_interval_ms);  in cw2017_parse_properties()
514 		dev_dbg(cw_bat->dev, "Using default poll interval\n");  in cw2017_parse_properties()
515 		cw_bat->poll_interval_ms = CW2017_DEFAULT_POLL_INTERVAL_MS;  in cw2017_parse_properties()
526 			 CW2017_REG_BATINFO + CW2017_SIZE_BATINFO - 1),
538 			 CW2017_REG_BATINFO + CW2017_SIZE_BATINFO - 1),
561 	.max_register = CW2017_REG_BATINFO + CW2017_SIZE_BATINFO - 1,
570 	cw_bat = devm_kzalloc(&client->dev, sizeof(*cw_bat), GFP_KERNEL);  in cw_bat_probe()
572 		return -ENOMEM;  in cw_bat_probe()
575 	cw_bat->dev = &client->dev;  in cw_bat_probe()
576 	cw_bat->soc = 1;  in cw_bat_probe()
580 		dev_err(cw_bat->dev, "Failed to parse cw2017 properties\n");  in cw_bat_probe()
584 	cw_bat->regmap = devm_regmap_init_i2c(client, &cw2017_regmap_config);  in cw_bat_probe()
585 	if (IS_ERR(cw_bat->regmap)) {  in cw_bat_probe()
586 		dev_err(cw_bat->dev, "Failed to allocate regmap: %ld\n",  in cw_bat_probe()
587 			PTR_ERR(cw_bat->regmap));  in cw_bat_probe()
588 		return PTR_ERR(cw_bat->regmap);  in cw_bat_probe()
593 		dev_err(cw_bat->dev, "Init failed: %d\n", ret);  in cw_bat_probe()
598 	psy_cfg.fwnode = dev_fwnode(cw_bat->dev);  in cw_bat_probe()
600 	cw_bat->rk_bat = devm_power_supply_register(&client->dev,  in cw_bat_probe()
603 	if (IS_ERR(cw_bat->rk_bat)) {  in cw_bat_probe()
604 		dev_err(cw_bat->dev, "Failed to register power supply\n");  in cw_bat_probe()
605 		return PTR_ERR(cw_bat->rk_bat);  in cw_bat_probe()
608 	ret = power_supply_get_battery_info(cw_bat->rk_bat, &cw_bat->battery);  in cw_bat_probe()
610 		dev_warn(cw_bat->dev,  in cw_bat_probe()
611 			 "No monitored battery, some properties will be missing\n");  in cw_bat_probe()
614 	cw_bat->battery_workqueue = create_singlethread_workqueue("rk_battery");  in cw_bat_probe()
615 	INIT_DELAYED_WORK(&cw_bat->battery_delay_work, cw_bat_work);  in cw_bat_probe()
616 	queue_delayed_work(cw_bat->battery_workqueue,  in cw_bat_probe()
617 			   &cw_bat->battery_delay_work, msecs_to_jiffies(10));  in cw_bat_probe()
627 	cancel_delayed_work_sync(&cw_bat->battery_delay_work);  in cw_bat_suspend()
636 	queue_delayed_work(cw_bat->battery_workqueue,  in cw_bat_resume()
637 			   &cw_bat->battery_delay_work, 0);  in cw_bat_resume()
647 	cancel_delayed_work_sync(&cw_bat->battery_delay_work);  in cw_bat_remove()
648 	power_supply_put_battery_info(cw_bat->rk_bat, &cw_bat->battery);  in cw_bat_remove()
676 MODULE_AUTHOR("Shunqing Chen<csq@rock-chips.com>");
677 MODULE_DESCRIPTION("cw2017 battery driver");