| /* |
| * drivers/amlogic/battery/amlogic_battery.c |
| * |
| * Copyright (C) 2017 Amlogic, Inc. All rights reserved. |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License as published by |
| * the Free Software Foundation; either version 2 of the License, or |
| * (at your option) any later version. |
| * |
| * This program is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for |
| * more details. |
| * |
| */ |
| |
| #include <linux/kernel.h> |
| #include <linux/module.h> |
| #include <linux/platform_device.h> |
| #include <linux/slab.h> |
| #include <linux/of.h> |
| #include <linux/mutex.h> |
| #include <linux/string.h> |
| #include <linux/power_supply.h> |
| |
| struct dummy_battery_info { |
| struct device *dev; |
| struct power_supply *battery; |
| struct mutex lock; |
| unsigned int present; |
| }; |
| |
| static int dummy_batt_get_prop(struct power_supply *psy, |
| enum power_supply_property psp, |
| union power_supply_propval *val) |
| { |
| static int counter = 1; |
| |
| switch (psp) { |
| case POWER_SUPPLY_PROP_PRESENT: |
| val->intval = 1; |
| break; |
| case POWER_SUPPLY_PROP_HEALTH: |
| val->intval = POWER_SUPPLY_HEALTH_GOOD; |
| break; |
| case POWER_SUPPLY_PROP_CAPACITY: |
| val->intval = 100; |
| break; |
| case POWER_SUPPLY_PROP_TECHNOLOGY: |
| val->intval = POWER_SUPPLY_TECHNOLOGY_LION; |
| break; |
| case POWER_SUPPLY_PROP_VOLTAGE_NOW: |
| val->intval = 4200; |
| break; |
| case POWER_SUPPLY_PROP_VOLTAGE_AVG: |
| val->intval = 4100; |
| break; |
| case POWER_SUPPLY_PROP_CURRENT_NOW: |
| val->intval = 1100; |
| break; |
| case POWER_SUPPLY_PROP_CHARGE_COUNTER: |
| val->intval = counter++; |
| break; |
| case POWER_SUPPLY_PROP_CHARGE_FULL: |
| val->intval = 10000000; |
| break; |
| case POWER_SUPPLY_PROP_STATUS: |
| val->intval = POWER_SUPPLY_STATUS_CHARGING; |
| break; |
| default: |
| return -ENODEV; |
| } |
| return 0; |
| } |
| |
| static int dummy_batt_set_prop(struct power_supply *psy, |
| enum power_supply_property psp, |
| const union power_supply_propval *val) |
| { |
| return -EPERM; |
| } |
| |
| static enum power_supply_property dummy_batt_props[] = { |
| POWER_SUPPLY_PROP_STATUS, |
| POWER_SUPPLY_PROP_HEALTH, |
| POWER_SUPPLY_PROP_CHARGE_COUNTER, |
| POWER_SUPPLY_PROP_PRESENT, |
| POWER_SUPPLY_PROP_CAPACITY, |
| POWER_SUPPLY_PROP_TECHNOLOGY, |
| POWER_SUPPLY_PROP_VOLTAGE_NOW, |
| POWER_SUPPLY_PROP_VOLTAGE_AVG, |
| POWER_SUPPLY_PROP_CURRENT_NOW, |
| POWER_SUPPLY_PROP_CHARGE_FULL, |
| }; |
| |
| static const struct power_supply_desc dummy_battery_desc = { |
| .name = "Battery", |
| .type = POWER_SUPPLY_TYPE_BATTERY, |
| .properties = dummy_batt_props, |
| .num_properties = ARRAY_SIZE(dummy_batt_props), |
| .get_property = dummy_batt_get_prop, |
| .set_property = dummy_batt_set_prop, |
| }; |
| |
| static int dummy_battery_probe(struct platform_device *pdev) |
| { |
| struct dummy_battery_info *info; |
| struct device *dev = &pdev->dev; |
| |
| info = devm_kzalloc(&pdev->dev, sizeof(*info), GFP_KERNEL); |
| if (!info) |
| return -ENOMEM; |
| |
| info->dev = dev; |
| |
| mutex_init(&info->lock); |
| platform_set_drvdata(pdev, info); |
| |
| info->battery = devm_power_supply_register(dev, |
| &dummy_battery_desc, |
| NULL); |
| if (IS_ERR(info->battery)) { |
| pr_err("\n%ld\n", PTR_ERR(info->battery)); |
| return PTR_ERR(info->battery); |
| } |
| |
| info->battery->dev.parent = dev; |
| |
| return 0; |
| } |
| |
| static const struct of_device_id meson_dummybattery_dt_match[] = { |
| { |
| .compatible = "amlogic, dummy-battery", |
| }, |
| {}, |
| }; |
| |
| static struct platform_driver dummy_battery_driver = { |
| .driver = { |
| .name = "dummy-battery", |
| .owner = THIS_MODULE, |
| .of_match_table = meson_dummybattery_dt_match, |
| }, |
| .probe = dummy_battery_probe, |
| }; |
| |
| module_platform_driver(dummy_battery_driver); |
| |
| MODULE_DESCRIPTION("Amlogic Dummy Battery driver"); |
| MODULE_LICENSE("GPL"); |
| MODULE_AUTHOR("Shuide Chen<shuide.chen@amlogic.com>"); |