2  * Battery charger driver for TI BQ24735
32 #include <linux/power/bq24735-charger.h>
50 	struct power_supply		*charger;  member
111 static int bq24735_config_charger(struct bq24735 *charger)  in bq24735_config_charger()  argument
113 	struct bq24735_platform *pdata = charger->pdata;  in bq24735_config_charger()
123 		ret = bq24735_write_word(charger->client,  in bq24735_config_charger()
126 			dev_err(&charger->client->dev,  in bq24735_config_charger()
127 				"Failed to write charger current : %d\n",  in bq24735_config_charger()
136 		ret = bq24735_write_word(charger->client,  in bq24735_config_charger()
139 			dev_err(&charger->client->dev,  in bq24735_config_charger()
140 				"Failed to write charger voltage : %d\n",  in bq24735_config_charger()
149 		ret = bq24735_write_word(charger->client,  in bq24735_config_charger()
152 			dev_err(&charger->client->dev,  in bq24735_config_charger()
162 static inline int bq24735_enable_charging(struct bq24735 *charger)  in bq24735_enable_charging()  argument
166 	if (charger->pdata->ext_control)  in bq24735_enable_charging()
169 	ret = bq24735_config_charger(charger);  in bq24735_enable_charging()
173 	return bq24735_update_word(charger->client, BQ24735_CHARGE_OPT,  in bq24735_enable_charging()
177 static inline int bq24735_disable_charging(struct bq24735 *charger)  in bq24735_disable_charging()  argument
179 	if (charger->pdata->ext_control)  in bq24735_disable_charging()
182 	return bq24735_update_word(charger->client, BQ24735_CHARGE_OPT,  in bq24735_disable_charging()
187 static bool bq24735_charger_is_present(struct bq24735 *charger)  in bq24735_charger_is_present()  argument
189 	if (charger->status_gpio) {  in bq24735_charger_is_present()
190 		return !gpiod_get_value_cansleep(charger->status_gpio);  in bq24735_charger_is_present()
194 		ac = bq24735_read_word(charger->client, BQ24735_CHARGE_OPT);  in bq24735_charger_is_present()
196 			dev_dbg(&charger->client->dev,  in bq24735_charger_is_present()
197 				"Failed to read charger options : %d\n",  in bq24735_charger_is_present()
207 static int bq24735_charger_is_charging(struct bq24735 *charger)  in bq24735_charger_is_charging()  argument
211 	if (!bq24735_charger_is_present(charger))  in bq24735_charger_is_charging()
214 	ret  = bq24735_read_word(charger->client, BQ24735_CHARGE_OPT);  in bq24735_charger_is_charging()
221 static void bq24735_update(struct bq24735 *charger)  in bq24735_update()  argument
223 	mutex_lock(&charger->lock);  in bq24735_update()
225 	if (charger->charging && bq24735_charger_is_present(charger))  in bq24735_update()
226 		bq24735_enable_charging(charger);  in bq24735_update()
228 		bq24735_disable_charging(charger);  in bq24735_update()
230 	mutex_unlock(&charger->lock);  in bq24735_update()
232 	power_supply_changed(charger->charger);  in bq24735_update()
238 	struct bq24735 *charger = to_bq24735(psy);  in bq24735_charger_isr()  local
240 	bq24735_update(charger);  in bq24735_charger_isr()
247 	struct bq24735 *charger = container_of(work, struct bq24735, poll.work);  in bq24735_poll()  local
249 	bq24735_update(charger);  in bq24735_poll()
251 	schedule_delayed_work(&charger->poll,  in bq24735_poll()
252 			      msecs_to_jiffies(charger->poll_interval));  in bq24735_poll()
259 	struct bq24735 *charger = to_bq24735(psy);  in bq24735_charger_get_property()  local
263 		val->intval = bq24735_charger_is_present(charger) ? 1 : 0;  in bq24735_charger_get_property()
266 		switch (bq24735_charger_is_charging(charger)) {  in bq24735_charger_get_property()
289 	struct bq24735 *charger = to_bq24735(psy);  in bq24735_charger_set_property()  local
296 			mutex_lock(&charger->lock);  in bq24735_charger_set_property()
297 			charger->charging = true;  in bq24735_charger_set_property()
298 			ret = bq24735_enable_charging(charger);  in bq24735_charger_set_property()
299 			mutex_unlock(&charger->lock);  in bq24735_charger_set_property()
305 			mutex_lock(&charger->lock);  in bq24735_charger_set_property()
306 			charger->charging = false;  in bq24735_charger_set_property()
307 			ret = bq24735_disable_charging(charger);  in bq24735_charger_set_property()
308 			mutex_unlock(&charger->lock);  in bq24735_charger_set_property()
358 	struct bq24735 *charger;  in bq24735_charger_probe()  local
363 	charger = devm_kzalloc(&client->dev, sizeof(*charger), GFP_KERNEL);  in bq24735_charger_probe()
364 	if (!charger)  in bq24735_charger_probe()
367 	mutex_init(&charger->lock);  in bq24735_charger_probe()
368 	charger->charging = true;  in bq24735_charger_probe()
369 	charger->pdata = client->dev.platform_data;  in bq24735_charger_probe()
371 	if (IS_ENABLED(CONFIG_OF) && !charger->pdata && client->dev.of_node)  in bq24735_charger_probe()
372 		charger->pdata = bq24735_parse_dt_data(client);  in bq24735_charger_probe()
374 	if (!charger->pdata) {  in bq24735_charger_probe()
379 	name = (char *)charger->pdata->name;  in bq24735_charger_probe()
390 	charger->client = client;  in bq24735_charger_probe()
392 	supply_desc = &charger->charger_desc;  in bq24735_charger_probe()
403 	psy_cfg.supplied_to = charger->pdata->supplied_to;  in bq24735_charger_probe()
404 	psy_cfg.num_supplicants = charger->pdata->num_supplicants;  in bq24735_charger_probe()
406 	psy_cfg.drv_data = charger;  in bq24735_charger_probe()
408 	i2c_set_clientdata(client, charger);  in bq24735_charger_probe()
410 	charger->status_gpio = devm_gpiod_get_optional(&client->dev,  in bq24735_charger_probe()
413 	if (IS_ERR(charger->status_gpio)) {  in bq24735_charger_probe()
414 		ret = PTR_ERR(charger->status_gpio);  in bq24735_charger_probe()
419 	if (bq24735_charger_is_present(charger)) {  in bq24735_charger_probe()
441 		ret = bq24735_enable_charging(charger);  in bq24735_charger_probe()
448 	charger->charger = devm_power_supply_register(&client->dev, supply_desc,  in bq24735_charger_probe()
450 	if (IS_ERR(charger->charger)) {  in bq24735_charger_probe()
451 		ret = PTR_ERR(charger->charger);  in bq24735_charger_probe()
464 						charger->charger);  in bq24735_charger_probe()
473 					       &charger->poll_interval);  in bq24735_charger_probe()
476 		if (!charger->poll_interval)  in bq24735_charger_probe()
479 		ret = devm_delayed_work_autocancel(&client->dev, &charger->poll,  in bq24735_charger_probe()
484 		schedule_delayed_work(&charger->poll,  in bq24735_charger_probe()
485 				      msecs_to_jiffies(charger->poll_interval));  in bq24735_charger_probe()
492 	{ "bq24735-charger" },
505 		.name = "bq24735-charger",