1 // SPDX-License-Identifier: GPL-2.0-only
3  * Battery and Power Management code for the Sharp SL-5x00
21 #include <asm/mach-types.h>
35 	bool (*is_present)(struct collie_bat *bat);
54 static unsigned long collie_read_bat(struct collie_bat *bat)  in collie_read_bat()  argument
58 	if (!bat->gpio_bat || bat->adc_bat < 0)  in collie_read_bat()
61 	gpiod_set_value(bat->gpio_bat, 1);  in collie_read_bat()
64 	value = ucb1x00_adc_read(ucb, bat->adc_bat, UCB_SYNC);  in collie_read_bat()
66 	gpiod_set_value(bat->gpio_bat, 0);  in collie_read_bat()
68 	value = value * 1000000 / bat->adc_bat_divider;  in collie_read_bat()
73 static unsigned long collie_read_temp(struct collie_bat *bat)  in collie_read_temp()  argument
76 	if (!bat->gpio_temp || bat->adc_temp < 0)  in collie_read_temp()
80 	gpiod_set_value(bat->gpio_temp, 1);  in collie_read_temp()
83 	value = ucb1x00_adc_read(ucb, bat->adc_temp, UCB_SYNC);  in collie_read_temp()
85 	gpiod_set_value(bat->gpio_temp, 0);  in collie_read_temp()
88 	value = value * 10000 / bat->adc_temp_divider;  in collie_read_temp()
98 	struct collie_bat *bat = power_supply_get_drvdata(psy);  in collie_bat_get_property()  local
100 	if (bat->is_present && !bat->is_present(bat)  in collie_bat_get_property()
102 		return -ENODEV;  in collie_bat_get_property()
107 		val->intval = bat->status;  in collie_bat_get_property()
110 		val->intval = bat->technology;  in collie_bat_get_property()
113 		val->intval = collie_read_bat(bat);  in collie_bat_get_property()
116 		if (bat->full_chrg == -1)  in collie_bat_get_property()
117 			val->intval = bat->bat_max;  in collie_bat_get_property()
119 			val->intval = bat->full_chrg;  in collie_bat_get_property()
122 		val->intval = bat->bat_max;  in collie_bat_get_property()
125 		val->intval = bat->bat_min;  in collie_bat_get_property()
128 		val->intval = collie_read_temp(bat);  in collie_bat_get_property()
131 		val->intval = bat->is_present ? bat->is_present(bat) : 1;  in collie_bat_get_property()
134 		ret = -EINVAL;  in collie_bat_get_property()
152 static void collie_bat_update(struct collie_bat *bat)  in collie_bat_update()  argument
155 	struct power_supply *psy = bat->psy;  in collie_bat_update()
157 	mutex_lock(&bat->work_lock);  in collie_bat_update()
159 	old = bat->status;  in collie_bat_update()
161 	if (bat->is_present && !bat->is_present(bat)) {  in collie_bat_update()
162 		printk(KERN_NOTICE "%s not present\n", psy->desc->name);  in collie_bat_update()
163 		bat->status = POWER_SUPPLY_STATUS_UNKNOWN;  in collie_bat_update()
164 		bat->full_chrg = -1;  in collie_bat_update()
166 		if (bat->status == POWER_SUPPLY_STATUS_DISCHARGING) {  in collie_bat_update()
167 			gpiod_set_value(bat->gpio_charge_on, 1);  in collie_bat_update()
171 		if (gpiod_get_value(bat->gpio_full)) {  in collie_bat_update()
173 					bat->full_chrg == -1)  in collie_bat_update()
174 				bat->full_chrg = collie_read_bat(bat);  in collie_bat_update()
176 			gpiod_set_value(bat->gpio_charge_on, 0);  in collie_bat_update()
177 			bat->status = POWER_SUPPLY_STATUS_FULL;  in collie_bat_update()
179 			gpiod_set_value(bat->gpio_charge_on, 1);  in collie_bat_update()
180 			bat->status = POWER_SUPPLY_STATUS_CHARGING;  in collie_bat_update()
183 		gpiod_set_value(bat->gpio_charge_on, 0);  in collie_bat_update()
184 		bat->status = POWER_SUPPLY_STATUS_DISCHARGING;  in collie_bat_update()
187 	if (old != bat->status)  in collie_bat_update()
190 	mutex_unlock(&bat->work_lock);  in collie_bat_update()
221 	.name		= "main-battery",
232 	.full_chrg = -1,
252 	.name		= "backup-battery",
262 	.full_chrg = -1,
277 	.adc_temp = -1,
278 	.adc_temp_divider = -1,
292 	if (device_may_wakeup(&dev->ucb->dev) &&  in collie_bat_suspend()
319 	struct gpio_chip *gc = &dev->ucb->gpio;  in collie_bat_probe()
322 		return -ENODEV;  in collie_bat_probe()
324 	ucb = dev->ucb;  in collie_bat_probe()
327 	collie_bat_main.gpio_full = gpiod_get(&dev->ucb->dev,  in collie_bat_probe()
333 	collie_mbat_low = gpiod_get(&dev->ucb->dev,  in collie_bat_probe()
341 	collie_bat_main.gpio_charge_on = gpiod_get(&dev->ucb->dev,  in collie_bat_probe()
390 	collie_bat_main.psy = power_supply_register(&dev->ucb->dev,  in collie_bat_probe()
399 	collie_bat_bu.psy = power_supply_register(&dev->ucb->dev,  in collie_bat_probe()
414 	device_init_wakeup(&ucb->dev, 1);  in collie_bat_probe()