1 // SPDX-License-Identifier: GPL-2.0+
3  * Battery driver for Acer Iconia Tab A500.
5  * Copyright 2020 GRATE-driver project.
68 	err = regmap_read(bat->regmap, ec_data[REG_CAPACITY].reg, &capacity);  in a500_battery_update_capacity()
75 	if (bat->capacity != capacity) {  in a500_battery_update_capacity()
76 		bat->capacity = capacity;  in a500_battery_update_capacity()
85 	if (bat->capacity < 100) {  in a500_battery_get_status()
86 		if (power_supply_am_i_supplied(bat->psy))  in a500_battery_get_status()
106 		val->intval *= base_unit_conversion;  in a500_battery_unit_adjustment()
110 		val->intval -= temp_kelvin_to_celsius;  in a500_battery_unit_adjustment()
114 		val->intval = !!val->intval;  in a500_battery_unit_adjustment()
129 	 * DESIGN_CAPACITY register always returns a non-zero value if  in a500_battery_get_ec_data_index()
142 	return -EINVAL;  in a500_battery_get_ec_data_index()
150 	struct device *dev = psy->dev.parent;  in a500_battery_get_property()
155 		val->intval = a500_battery_get_status(bat);  in a500_battery_get_property()
159 		val->intval = POWER_SUPPLY_TECHNOLOGY_LION;  in a500_battery_get_property()
164 		val->intval = bat->capacity;  in a500_battery_get_property()
176 		ret = regmap_read(bat->regmap, ec_data[ret].reg, &val->intval);  in a500_battery_get_property()
181 		return -EINVAL;  in a500_battery_get_property()
190 		__func__, psp, val->intval);  in a500_battery_get_property()
194 		return -ENODATA;  in a500_battery_get_property()
208 		power_supply_changed(bat->psy);  in a500_battery_poll_work()
211 	schedule_delayed_work(&bat->poll_work, 30 * HZ);  in a500_battery_poll_work()
215 	.name = "ec-battery",
228 	bat = devm_kzalloc(&pdev->dev, sizeof(*bat), GFP_KERNEL);  in a500_battery_probe()
230 		return -ENOMEM;  in a500_battery_probe()
234 	psy_cfg.of_node = pdev->dev.parent->of_node;  in a500_battery_probe()
237 	bat->regmap = dev_get_regmap(pdev->dev.parent, "KB930");  in a500_battery_probe()
238 	if (!bat->regmap)  in a500_battery_probe()
239 		return -EINVAL;  in a500_battery_probe()
241 	bat->psy = devm_power_supply_register_no_ws(&pdev->dev,  in a500_battery_probe()
244 	if (IS_ERR(bat->psy))  in a500_battery_probe()
245 		return dev_err_probe(&pdev->dev, PTR_ERR(bat->psy),  in a500_battery_probe()
248 	INIT_DELAYED_WORK(&bat->poll_work, a500_battery_poll_work);  in a500_battery_probe()
249 	schedule_delayed_work(&bat->poll_work, HZ);  in a500_battery_probe()
256 	struct a500_battery *bat = dev_get_drvdata(&pdev->dev);  in a500_battery_remove()
258 	cancel_delayed_work_sync(&bat->poll_work);  in a500_battery_remove()
265 	cancel_delayed_work_sync(&bat->poll_work);  in a500_battery_suspend()
274 	schedule_delayed_work(&bat->poll_work, HZ);  in a500_battery_resume()
284 		.name = "acer-a500-iconia-battery",
292 MODULE_DESCRIPTION("Battery gauge driver for Acer Iconia Tab A500");
294 MODULE_ALIAS("platform:acer-a500-iconia-battery");