1 // SPDX-License-Identifier: GPL-2.0-only
3 * Battery class driver for Apple PMU
5 * Copyright © 2006 David Woodhouse <dwmw2@infradead.org>
8 #include <linux/module.h>
9 #include <linux/platform_device.h>
10 #include <linux/err.h>
11 #include <linux/power_supply.h>
12 #include <linux/adb.h>
13 #include <linux/pmu.h>
14 #include <linux/slab.h>
16 static struct pmu_battery_dev {
17 struct power_supply *bat;
18 struct power_supply_desc bat_desc;
19 struct pmu_battery_info *pbi;
22 } *pbats[PMU_MAX_BATTERIES];
24 #define to_pmu_battery_dev(x) power_supply_get_drvdata(x)
26 /*********************************************************************
28 *********************************************************************/
30 static int pmu_get_ac_prop(struct power_supply *psy,
31 enum power_supply_property psp,
32 union power_supply_propval *val)
35 case POWER_SUPPLY_PROP_ONLINE:
36 val->intval = (!!(pmu_power_flags & PMU_PWR_AC_PRESENT)) ||
37 (pmu_battery_count == 0);
46 static enum power_supply_property pmu_ac_props[] = {
47 POWER_SUPPLY_PROP_ONLINE,
50 static const struct power_supply_desc pmu_ac_desc = {
52 .type = POWER_SUPPLY_TYPE_MAINS,
53 .properties = pmu_ac_props,
54 .num_properties = ARRAY_SIZE(pmu_ac_props),
55 .get_property = pmu_get_ac_prop,
58 static struct power_supply *pmu_ac;
60 /*********************************************************************
62 *********************************************************************/
64 static char *pmu_batt_types[] = {
65 "Smart", "Comet", "Hooper", "Unknown"
68 static char *pmu_bat_get_model_name(struct pmu_battery_info *pbi)
70 switch (pbi->flags & PMU_BATT_TYPE_MASK) {
71 case PMU_BATT_TYPE_SMART:
72 return pmu_batt_types[0];
73 case PMU_BATT_TYPE_COMET:
74 return pmu_batt_types[1];
75 case PMU_BATT_TYPE_HOOPER:
76 return pmu_batt_types[2];
79 return pmu_batt_types[3];
82 static int pmu_bat_get_property(struct power_supply *psy,
83 enum power_supply_property psp,
84 union power_supply_propval *val)
86 struct pmu_battery_dev *pbat = to_pmu_battery_dev(psy);
87 struct pmu_battery_info *pbi = pbat->pbi;
90 case POWER_SUPPLY_PROP_STATUS:
91 if (pbi->flags & PMU_BATT_CHARGING)
92 val->intval = POWER_SUPPLY_STATUS_CHARGING;
93 else if (pmu_power_flags & PMU_PWR_AC_PRESENT)
94 val->intval = POWER_SUPPLY_STATUS_FULL;
96 val->intval = POWER_SUPPLY_STATUS_DISCHARGING;
98 case POWER_SUPPLY_PROP_PRESENT:
99 val->intval = !!(pbi->flags & PMU_BATT_PRESENT);
101 case POWER_SUPPLY_PROP_MODEL_NAME:
102 val->strval = pmu_bat_get_model_name(pbi);
104 case POWER_SUPPLY_PROP_ENERGY_AVG:
105 val->intval = pbi->charge * 1000; /* mWh -> µWh */
107 case POWER_SUPPLY_PROP_ENERGY_FULL:
108 val->intval = pbi->max_charge * 1000; /* mWh -> µWh */
110 case POWER_SUPPLY_PROP_CURRENT_AVG:
111 val->intval = pbi->amperage * 1000; /* mA -> µA */
113 case POWER_SUPPLY_PROP_VOLTAGE_AVG:
114 val->intval = pbi->voltage * 1000; /* mV -> µV */
116 case POWER_SUPPLY_PROP_TIME_TO_EMPTY_AVG:
117 val->intval = pbi->time_remaining;
126 static enum power_supply_property pmu_bat_props[] = {
127 POWER_SUPPLY_PROP_STATUS,
128 POWER_SUPPLY_PROP_PRESENT,
129 POWER_SUPPLY_PROP_MODEL_NAME,
130 POWER_SUPPLY_PROP_ENERGY_AVG,
131 POWER_SUPPLY_PROP_ENERGY_FULL,
132 POWER_SUPPLY_PROP_CURRENT_AVG,
133 POWER_SUPPLY_PROP_VOLTAGE_AVG,
134 POWER_SUPPLY_PROP_TIME_TO_EMPTY_AVG,
137 /*********************************************************************
139 *********************************************************************/
141 static struct platform_device *bat_pdev;
143 static int __init pmu_bat_init(void)
148 bat_pdev = platform_device_register_simple("pmu-battery",
150 if (IS_ERR(bat_pdev)) {
151 ret = PTR_ERR(bat_pdev);
152 goto pdev_register_failed;
155 pmu_ac = power_supply_register(&bat_pdev->dev, &pmu_ac_desc, NULL);
156 if (IS_ERR(pmu_ac)) {
157 ret = PTR_ERR(pmu_ac);
158 goto ac_register_failed;
161 for (i = 0; i < pmu_battery_count; i++) {
162 struct power_supply_config psy_cfg = {};
163 struct pmu_battery_dev *pbat = kzalloc(sizeof(*pbat),
168 sprintf(pbat->name, "PMU_battery_%d", i);
169 pbat->bat_desc.name = pbat->name;
170 pbat->bat_desc.properties = pmu_bat_props;
171 pbat->bat_desc.num_properties = ARRAY_SIZE(pmu_bat_props);
172 pbat->bat_desc.get_property = pmu_bat_get_property;
173 pbat->pbi = &pmu_batteries[i];
174 psy_cfg.drv_data = pbat;
176 pbat->bat = power_supply_register(&bat_pdev->dev,
179 if (IS_ERR(pbat->bat)) {
180 ret = PTR_ERR(pbat->bat);
182 goto battery_register_failed;
189 battery_register_failed:
193 power_supply_unregister(pbats[i]->bat);
196 power_supply_unregister(pmu_ac);
198 platform_device_unregister(bat_pdev);
199 pdev_register_failed:
204 static void __exit pmu_bat_exit(void)
208 for (i = 0; i < PMU_MAX_BATTERIES; i++) {
211 power_supply_unregister(pbats[i]->bat);
214 power_supply_unregister(pmu_ac);
215 platform_device_unregister(bat_pdev);
218 module_init(pmu_bat_init);
219 module_exit(pmu_bat_exit);
221 MODULE_AUTHOR("David Woodhouse <dwmw2@infradead.org>");
222 MODULE_LICENSE("GPL");
223 MODULE_DESCRIPTION("PMU battery driver");