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Based on 2 normalized pattern(s): this program is free software you can redistribute it and or modify it under the terms of the gnu general public license version 2 as published by the free software foundation this program is free software you can redistribute it and or modify it under the terms of the gnu general public license version 2 as published by the free software foundation # extracted by the scancode license scanner the SPDX license identifier GPL-2.0-only has been chosen to replace the boilerplate/reference in 4122 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Enrico Weigelt <info@metux.net> Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org> Reviewed-by: Allison Randal <allison@lohutok.net> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190604081206.933168790@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
224 lines
5.4 KiB
C
224 lines
5.4 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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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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#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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#include <linux/slab.h>
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static struct pmu_battery_dev {
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struct power_supply *bat;
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struct power_supply_desc bat_desc;
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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) power_supply_get_drvdata(x)
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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 const struct power_supply_desc pmu_ac_desc = {
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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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static struct power_supply *pmu_ac;
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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 if (pmu_power_flags & PMU_PWR_AC_PRESENT)
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val->intval = POWER_SUPPLY_STATUS_FULL;
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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 = 0;
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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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pmu_ac = power_supply_register(&bat_pdev->dev, &pmu_ac_desc, NULL);
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if (IS_ERR(pmu_ac)) {
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ret = PTR_ERR(pmu_ac);
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goto ac_register_failed;
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}
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for (i = 0; i < pmu_battery_count; i++) {
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struct power_supply_config psy_cfg = {};
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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_desc.name = pbat->name;
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pbat->bat_desc.properties = pmu_bat_props;
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pbat->bat_desc.num_properties = ARRAY_SIZE(pmu_bat_props);
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pbat->bat_desc.get_property = pmu_bat_get_property;
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pbat->pbi = &pmu_batteries[i];
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psy_cfg.drv_data = pbat;
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pbat->bat = power_supply_register(&bat_pdev->dev,
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&pbat->bat_desc,
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&psy_cfg);
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if (IS_ERR(pbat->bat)) {
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ret = PTR_ERR(pbat->bat);
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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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}
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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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