1 // SPDX-License-Identifier: GPL-2.0-only
15 #include <linux/extcon-provider.h>
63 	unsigned int reg[4];
65 	unsigned int charge_voltage_max;
66 	unsigned int charge_voltage_safe;
67 	unsigned int charge_current_max;
68 	unsigned int charge_current_safe;
71 static const unsigned int pm8916_lbc_charger_cable[] = {
83 static int pm8916_lbc_charger_configure(struct pm8916_lbc_charger *chg)  in pm8916_lbc_charger_configure()  argument
85 	int ret = 0;  in pm8916_lbc_charger_configure()
86 	unsigned int tmp;  in pm8916_lbc_charger_configure()
88 	chg->charge_voltage_max = clamp_t(u32, chg->charge_voltage_max,  in pm8916_lbc_charger_configure()
89 					  PM8916_LBC_CHGR_MIN_VOLTAGE, chg->charge_voltage_safe);  in pm8916_lbc_charger_configure()
91 	tmp = chg->charge_voltage_max - PM8916_LBC_CHGR_MIN_VOLTAGE;  in pm8916_lbc_charger_configure()
93 	chg->charge_voltage_max = PM8916_LBC_CHGR_MIN_VOLTAGE + tmp * PM8916_LBC_CHGR_VOLTAGE_STEP;  in pm8916_lbc_charger_configure()
95 	ret = regmap_write(chg->regmap, chg->reg[LBC_CHGR] + PM8916_LBC_CHGR_VDD_MAX, tmp);  in pm8916_lbc_charger_configure()
99 	chg->charge_current_max = min(chg->charge_current_max, chg->charge_current_safe);  in pm8916_lbc_charger_configure()
101 	tmp = clamp_t(u32, chg->charge_current_max,  in pm8916_lbc_charger_configure()
104 	tmp = chg->charge_current_max / PM8916_LBC_CHGR_MIN_CURRENT - 1;  in pm8916_lbc_charger_configure()
105 	chg->charge_current_max = (tmp + 1) * PM8916_LBC_CHGR_MIN_CURRENT;  in pm8916_lbc_charger_configure()
107 	ret = regmap_write(chg->regmap, chg->reg[LBC_CHGR] + PM8916_LBC_CHGR_IBAT_MAX, tmp);  in pm8916_lbc_charger_configure()
111 	ret = regmap_write(chg->regmap, chg->reg[LBC_CHGR] + PM8916_LBC_CHGR_CHG_CTRL,  in pm8916_lbc_charger_configure()
119 	dev_err(chg->dev, "Failed to configure charging: %pe\n", ERR_PTR(ret));  in pm8916_lbc_charger_configure()
123 static int pm8916_lbc_charger_get_property(struct power_supply *psy,  in pm8916_lbc_charger_get_property()
127 	struct pm8916_lbc_charger *chg = power_supply_get_drvdata(psy);  in pm8916_lbc_charger_get_property()  local
131 		val->intval = chg->online;  in pm8916_lbc_charger_get_property()
135 		val->intval = chg->charge_voltage_max;  in pm8916_lbc_charger_get_property()
139 		val->intval = chg->charge_current_max;  in pm8916_lbc_charger_get_property()
143 		return -EINVAL;  in pm8916_lbc_charger_get_property()
147 static int pm8916_lbc_charger_set_property(struct power_supply *psy,  in pm8916_lbc_charger_set_property()
151 	struct pm8916_lbc_charger *chg = power_supply_get_drvdata(psy);  in pm8916_lbc_charger_set_property()  local
155 		chg->charge_current_max = val->intval;  in pm8916_lbc_charger_set_property()
156 		return pm8916_lbc_charger_configure(chg);  in pm8916_lbc_charger_set_property()
158 		return -EINVAL;  in pm8916_lbc_charger_set_property()
162 static int pm8916_lbc_charger_property_is_writeable(struct power_supply *psy,  in pm8916_lbc_charger_property_is_writeable()
179 static irqreturn_t pm8916_lbc_charger_state_changed_irq(int irq, void *data)  in pm8916_lbc_charger_state_changed_irq()
181 	struct pm8916_lbc_charger *chg = data;  in pm8916_lbc_charger_state_changed_irq()  local
182 	unsigned int tmp;  in pm8916_lbc_charger_state_changed_irq()
183 	int ret;  in pm8916_lbc_charger_state_changed_irq()
185 	ret = regmap_read(chg->regmap, chg->reg[LBC_USB] + PM8916_INT_RT_STS, &tmp);  in pm8916_lbc_charger_state_changed_irq()
189 	chg->online = !!(tmp & PM8916_LBC_USB_USBIN_VALID);  in pm8916_lbc_charger_state_changed_irq()
190 	extcon_set_state_sync(chg->edev, EXTCON_USB, chg->online);  in pm8916_lbc_charger_state_changed_irq()
192 	power_supply_changed(chg->charger);  in pm8916_lbc_charger_state_changed_irq()
197 static int pm8916_lbc_charger_probe_dt(struct pm8916_lbc_charger *chg)  in pm8916_lbc_charger_probe_dt()  argument
199 	struct device *dev = chg->dev;  in pm8916_lbc_charger_probe_dt()
200 	int ret = 0;  in pm8916_lbc_charger_probe_dt()
201 	unsigned int tmp;  in pm8916_lbc_charger_probe_dt()
203 	ret = device_property_read_u32(dev, "qcom,fast-charge-safe-voltage", &chg->charge_voltage_safe);  in pm8916_lbc_charger_probe_dt()
206 	if (chg->charge_voltage_safe < PM8916_LBC_CHGR_MIN_VOLTAGE)  in pm8916_lbc_charger_probe_dt()
207 		return -EINVAL;  in pm8916_lbc_charger_probe_dt()
209 	chg->charge_voltage_safe = clamp_t(u32, chg->charge_voltage_safe,  in pm8916_lbc_charger_probe_dt()
212 	tmp = chg->charge_voltage_safe - PM8916_LBC_CHGR_MIN_VOLTAGE;  in pm8916_lbc_charger_probe_dt()
214 	ret = regmap_write(chg->regmap, chg->reg[LBC_CHGR] + PM8916_LBC_CHGR_VDD_SAFE, tmp);  in pm8916_lbc_charger_probe_dt()
218 	ret = device_property_read_u32(dev, "qcom,fast-charge-safe-current", &chg->charge_current_safe);  in pm8916_lbc_charger_probe_dt()
221 	if (chg->charge_current_safe < PM8916_LBC_CHGR_MIN_CURRENT)  in pm8916_lbc_charger_probe_dt()
222 		return -EINVAL;  in pm8916_lbc_charger_probe_dt()
224 	chg->charge_current_safe = clamp_t(u32, chg->charge_current_safe,  in pm8916_lbc_charger_probe_dt()
227 	chg->charge_current_max = chg->charge_current_safe;  in pm8916_lbc_charger_probe_dt()
229 	tmp = chg->charge_current_safe / PM8916_LBC_CHGR_MIN_CURRENT - 1;  in pm8916_lbc_charger_probe_dt()
230 	ret = regmap_write(chg->regmap, chg->reg[LBC_CHGR] + PM8916_LBC_CHGR_IBAT_SAFE, tmp);  in pm8916_lbc_charger_probe_dt()
235 	ret = regmap_write(chg->regmap, chg->reg[LBC_CHGR] + PM8916_LBC_CHGR_TCHG_MAX_EN, 0x00);  in pm8916_lbc_charger_probe_dt()
243 	.name = "pm8916-lbc-chgr",
252 static int pm8916_lbc_charger_probe(struct platform_device *pdev)  in pm8916_lbc_charger_probe()
254 	struct device *dev = &pdev->dev;  in pm8916_lbc_charger_probe()
255 	struct pm8916_lbc_charger *chg;  in pm8916_lbc_charger_probe()  local
257 	int ret, len, irq;  in pm8916_lbc_charger_probe()
258 	unsigned int tmp;  in pm8916_lbc_charger_probe()
260 	chg = devm_kzalloc(dev, sizeof(*chg), GFP_KERNEL);  in pm8916_lbc_charger_probe()
261 	if (!chg)  in pm8916_lbc_charger_probe()
262 		return -ENOMEM;  in pm8916_lbc_charger_probe()
264 	chg->dev = dev;  in pm8916_lbc_charger_probe()
266 	chg->regmap = dev_get_regmap(pdev->dev.parent, NULL);  in pm8916_lbc_charger_probe()
267 	if (!chg->regmap)  in pm8916_lbc_charger_probe()
268 		return -ENODEV;  in pm8916_lbc_charger_probe()
274 		return dev_err_probe(dev, -EINVAL,  in pm8916_lbc_charger_probe()
282 					IRQF_ONESHOT, "pm8916_lbc", chg);  in pm8916_lbc_charger_probe()
286 	ret = device_property_read_u32_array(dev, "reg", chg->reg, len);  in pm8916_lbc_charger_probe()
290 	ret = regmap_bulk_read(chg->regmap, chg->reg[LBC_CHGR] + PM8916_PERPH_TYPE, &tmp, 2);  in pm8916_lbc_charger_probe()
296 	ret = regmap_bulk_read(chg->regmap, chg->reg[LBC_BAT_IF] + PM8916_PERPH_TYPE, &tmp, 2);  in pm8916_lbc_charger_probe()
302 	ret = regmap_bulk_read(chg->regmap, chg->reg[LBC_USB] + PM8916_PERPH_TYPE, &tmp, 2);  in pm8916_lbc_charger_probe()
308 	ret = regmap_bulk_read(chg->regmap, chg->reg[LBC_MISC] + PM8916_PERPH_TYPE, &tmp, 2);  in pm8916_lbc_charger_probe()
314 	ret = regmap_read(chg->regmap, chg->reg[LBC_CHGR] + PM8916_LBC_CHGR_CHG_OPTION, &tmp);  in pm8916_lbc_charger_probe()
318 		dev_err_probe(dev, -ENODEV, "The system is using an external charger\n");  in pm8916_lbc_charger_probe()
320 	ret = pm8916_lbc_charger_probe_dt(chg);  in pm8916_lbc_charger_probe()
324 	psy_cfg.drv_data = chg;  in pm8916_lbc_charger_probe()
325 	psy_cfg.of_node = dev->of_node;  in pm8916_lbc_charger_probe()
327 	chg->charger = devm_power_supply_register(dev, &pm8916_lbc_charger_psy_desc, &psy_cfg);  in pm8916_lbc_charger_probe()
328 	if (IS_ERR(chg->charger))  in pm8916_lbc_charger_probe()
329 		return dev_err_probe(dev, PTR_ERR(chg->charger), "Unable to register charger\n");  in pm8916_lbc_charger_probe()
331 	ret = power_supply_get_battery_info(chg->charger, &chg->info);  in pm8916_lbc_charger_probe()
335 	chg->edev = devm_extcon_dev_allocate(dev, pm8916_lbc_charger_cable);  in pm8916_lbc_charger_probe()
336 	if (IS_ERR(chg->edev))  in pm8916_lbc_charger_probe()
337 		return PTR_ERR(chg->edev);  in pm8916_lbc_charger_probe()
339 	ret = devm_extcon_dev_register(dev, chg->edev);  in pm8916_lbc_charger_probe()
343 	ret = regmap_read(chg->regmap, chg->reg[LBC_USB] + PM8916_INT_RT_STS, &tmp);  in pm8916_lbc_charger_probe()
347 	chg->online = !!(tmp & PM8916_LBC_USB_USBIN_VALID);  in pm8916_lbc_charger_probe()
348 	extcon_set_state_sync(chg->edev, EXTCON_USB, chg->online);  in pm8916_lbc_charger_probe()
350 	chg->charge_voltage_max = chg->info->voltage_max_design_uv;  in pm8916_lbc_charger_probe()
351 	ret = pm8916_lbc_charger_configure(chg);  in pm8916_lbc_charger_probe()
361 	return dev_err_probe(dev, -ENODEV, "Device reported wrong type: 0x%X\n", tmp);  in pm8916_lbc_charger_probe()
365 	{ .compatible = "qcom,pm8916-lbc", },
372 		.name = "pm8916-lbc",