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[BATTERY] Apple PMU driver
Signed-off-by: David Woodhouse <dwmw2@infradead.org> Signed-off-by: Anton Vorontsov <cbou@mail.ru>
This commit is contained in:
David Woodhouse
parent
fe0e3153ac
commit
efea58e397
@ -35,4 +35,11 @@ config BATTERY_DS2760
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help
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Say Y here to enable support for batteries with ds2760 chip.
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config BATTERY_PMU
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tristate "Apple PMU battery"
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depends on ADB_PMU
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help
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Say Y here to expose battery information on Apple machines
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through the generic battery class.
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endif # POWER_SUPPLY
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@ -18,3 +18,4 @@ obj-$(CONFIG_PDA_POWER) += pda_power.o
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obj-$(CONFIG_APM_POWER) += apm_power.o
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obj-$(CONFIG_BATTERY_DS2760) += ds2760_battery.o
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obj-$(CONFIG_BATTERY_PMU) += pmu_battery.o
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215
drivers/power/pmu_battery.c
Normal file
215
drivers/power/pmu_battery.c
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@ -0,0 +1,215 @@
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/*
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* Battery class driver for Apple PMU
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*
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* Copyright © 2006 David Woodhouse <dwmw2@infradead.org>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#include <linux/module.h>
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#include <linux/platform_device.h>
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#include <linux/err.h>
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#include <linux/power_supply.h>
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#include <linux/adb.h>
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#include <linux/pmu.h>
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static struct pmu_battery_dev {
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struct power_supply bat;
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struct pmu_battery_info *pbi;
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char name[16];
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int propval;
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} *pbats[PMU_MAX_BATTERIES];
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#define to_pmu_battery_dev(x) container_of(x, struct pmu_battery_dev, bat)
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/*********************************************************************
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* Power
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*********************************************************************/
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static int pmu_get_ac_prop(struct power_supply *psy,
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enum power_supply_property psp,
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union power_supply_propval *val)
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{
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switch (psp) {
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case POWER_SUPPLY_PROP_ONLINE:
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val->intval = (!!(pmu_power_flags & PMU_PWR_AC_PRESENT)) ||
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(pmu_battery_count == 0);
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break;
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default:
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return -EINVAL;
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}
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return 0;
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}
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static enum power_supply_property pmu_ac_props[] = {
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POWER_SUPPLY_PROP_ONLINE,
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};
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static struct power_supply pmu_ac = {
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.name = "pmu-ac",
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.type = POWER_SUPPLY_TYPE_MAINS,
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.properties = pmu_ac_props,
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.num_properties = ARRAY_SIZE(pmu_ac_props),
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.get_property = pmu_get_ac_prop,
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};
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/*********************************************************************
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* Battery properties
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*********************************************************************/
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static char *pmu_batt_types[] = {
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"Smart", "Comet", "Hooper", "Unknown"
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};
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static char *pmu_bat_get_model_name(struct pmu_battery_info *pbi)
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{
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switch (pbi->flags & PMU_BATT_TYPE_MASK) {
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case PMU_BATT_TYPE_SMART:
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return pmu_batt_types[0];
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case PMU_BATT_TYPE_COMET:
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return pmu_batt_types[1];
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case PMU_BATT_TYPE_HOOPER:
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return pmu_batt_types[2];
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default: break;
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}
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return pmu_batt_types[3];
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}
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static int pmu_bat_get_property(struct power_supply *psy,
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enum power_supply_property psp,
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union power_supply_propval *val)
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{
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struct pmu_battery_dev *pbat = to_pmu_battery_dev(psy);
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struct pmu_battery_info *pbi = pbat->pbi;
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switch (psp) {
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case POWER_SUPPLY_PROP_STATUS:
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if (pbi->flags & PMU_BATT_CHARGING)
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val->intval = POWER_SUPPLY_STATUS_CHARGING;
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else
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val->intval = POWER_SUPPLY_STATUS_DISCHARGING;
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break;
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case POWER_SUPPLY_PROP_PRESENT:
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val->intval = !!(pbi->flags & PMU_BATT_PRESENT);
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break;
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case POWER_SUPPLY_PROP_MODEL_NAME:
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val->strval = pmu_bat_get_model_name(pbi);
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break;
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case POWER_SUPPLY_PROP_ENERGY_AVG:
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val->intval = pbi->charge * 1000; /* mWh -> µWh */
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break;
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case POWER_SUPPLY_PROP_ENERGY_FULL:
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val->intval = pbi->max_charge * 1000; /* mWh -> µWh */
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break;
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case POWER_SUPPLY_PROP_CURRENT_AVG:
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val->intval = pbi->amperage * 1000; /* mA -> µA */
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break;
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case POWER_SUPPLY_PROP_VOLTAGE_AVG:
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val->intval = pbi->voltage * 1000; /* mV -> µV */
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break;
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case POWER_SUPPLY_PROP_TIME_TO_EMPTY_AVG:
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val->intval = pbi->time_remaining;
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break;
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default:
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return -EINVAL;
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}
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return 0;
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}
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static enum power_supply_property pmu_bat_props[] = {
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POWER_SUPPLY_PROP_STATUS,
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POWER_SUPPLY_PROP_PRESENT,
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POWER_SUPPLY_PROP_MODEL_NAME,
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POWER_SUPPLY_PROP_ENERGY_AVG,
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POWER_SUPPLY_PROP_ENERGY_FULL,
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POWER_SUPPLY_PROP_CURRENT_AVG,
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POWER_SUPPLY_PROP_VOLTAGE_AVG,
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POWER_SUPPLY_PROP_TIME_TO_EMPTY_AVG,
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};
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/*********************************************************************
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* Initialisation
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*********************************************************************/
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static struct platform_device *bat_pdev;
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static int __init pmu_bat_init(void)
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{
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int ret;
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int i;
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bat_pdev = platform_device_register_simple("pmu-battery",
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0, NULL, 0);
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if (IS_ERR(bat_pdev)) {
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ret = PTR_ERR(bat_pdev);
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goto pdev_register_failed;
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}
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ret = power_supply_register(&bat_pdev->dev, &pmu_ac);
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if (ret)
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goto ac_register_failed;
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for (i = 0; i < pmu_battery_count; i++) {
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struct pmu_battery_dev *pbat = kzalloc(sizeof(*pbat),
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GFP_KERNEL);
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if (!pbat)
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break;
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sprintf(pbat->name, "PMU battery %d", i);
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pbat->bat.name = pbat->name;
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pbat->bat.properties = pmu_bat_props;
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pbat->bat.num_properties = ARRAY_SIZE(pmu_bat_props);
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pbat->bat.get_property = pmu_bat_get_property;
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pbat->pbi = &pmu_batteries[i];
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ret = power_supply_register(&bat_pdev->dev, &pbat->bat);
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if (ret) {
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kfree(pbat);
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goto battery_register_failed;
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}
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pbats[i] = pbat;
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}
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goto success;
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battery_register_failed:
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while (i--) {
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if (!pbats[i])
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continue;
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power_supply_unregister(&pbats[i]->bat);
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kfree(pbats[i]);
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}
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power_supply_unregister(&pmu_ac);
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ac_register_failed:
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platform_device_unregister(bat_pdev);
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pdev_register_failed:
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success:
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return ret;
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}
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static void __exit pmu_bat_exit(void)
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{
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int i;
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for (i = 0; i < PMU_MAX_BATTERIES; i++) {
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if (!pbats[i])
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continue;
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power_supply_unregister(&pbats[i]->bat);
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kfree(pbats[i]);
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}
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power_supply_unregister(&pmu_ac);
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platform_device_unregister(bat_pdev);
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return;
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}
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module_init(pmu_bat_init);
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module_exit(pmu_bat_exit);
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MODULE_AUTHOR("David Woodhouse <dwmw2@infradead.org>");
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MODULE_LICENSE("GPL");
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MODULE_DESCRIPTION("PMU battery driver");
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