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Release 4.11 drivers/power/supply/max17040_battery.c

/*
 *  max17040_battery.c
 *  fuel-gauge systems for lithium-ion (Li+) batteries
 *
 *  Copyright (C) 2009 Samsung Electronics
 *  Minkyu Kang <mk7.kang@samsung.com>
 *
 * 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.
 */

#include <linux/module.h>
#include <linux/init.h>
#include <linux/platform_device.h>
#include <linux/mutex.h>
#include <linux/err.h>
#include <linux/i2c.h>
#include <linux/delay.h>
#include <linux/power_supply.h>
#include <linux/max17040_battery.h>
#include <linux/slab.h>


#define MAX17040_VCELL	0x02

#define MAX17040_SOC	0x04

#define MAX17040_MODE	0x06

#define MAX17040_VER	0x08

#define MAX17040_RCOMP	0x0C

#define MAX17040_CMD	0xFE



#define MAX17040_DELAY		1000

#define MAX17040_BATTERY_FULL	95


struct max17040_chip {
	
struct i2c_client		*client;
	
struct delayed_work		work;
	
struct power_supply		*battery;
	
struct max17040_platform_data	*pdata;

	/* State Of Connect */
	
int online;
	/* battery voltage */
	
int vcell;
	/* battery capacity */
	
int soc;
	/* State Of Charge */
	
int status;
};


static int max17040_get_property(struct power_supply *psy, enum power_supply_property psp, union power_supply_propval *val) { struct max17040_chip *chip = power_supply_get_drvdata(psy); switch (psp) { case POWER_SUPPLY_PROP_STATUS: val->intval = chip->status; break; case POWER_SUPPLY_PROP_ONLINE: val->intval = chip->online; break; case POWER_SUPPLY_PROP_VOLTAGE_NOW: val->intval = chip->vcell; break; case POWER_SUPPLY_PROP_CAPACITY: val->intval = chip->soc; break; default: return -EINVAL; } return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Minkyu Kang9198.91%150.00%
Krzysztof Kozlowski11.09%150.00%
Total92100.00%2100.00%


static int max17040_write_reg(struct i2c_client *client, int reg, u16 value) { int ret; ret = i2c_smbus_write_word_swapped(client, reg, value); if (ret < 0) dev_err(&client->dev, "%s: err %d\n", __func__, ret); return ret; }

Contributors

PersonTokensPropCommitsCommitProp
Minkyu Kang5296.30%150.00%
Liu Xiang23.70%150.00%
Total54100.00%2100.00%


static int max17040_read_reg(struct i2c_client *client, int reg) { int ret; ret = i2c_smbus_read_word_swapped(client, reg); if (ret < 0) dev_err(&client->dev, "%s: err %d\n", __func__, ret); return ret; }

Contributors

PersonTokensPropCommitsCommitProp
Minkyu Kang4897.96%150.00%
Liu Xiang12.04%150.00%
Total49100.00%2100.00%


static void max17040_reset(struct i2c_client *client) { max17040_write_reg(client, MAX17040_CMD, 0x0054); }

Contributors

PersonTokensPropCommitsCommitProp
Minkyu Kang1890.00%150.00%
Liu Xiang210.00%150.00%
Total20100.00%2100.00%


static void max17040_get_vcell(struct i2c_client *client) { struct max17040_chip *chip = i2c_get_clientdata(client); u16 vcell; vcell = max17040_read_reg(client, MAX17040_VCELL); chip->vcell = vcell; }

Contributors

PersonTokensPropCommitsCommitProp
Minkyu Kang3487.18%150.00%
Liu Xiang512.82%150.00%
Total39100.00%2100.00%


static void max17040_get_soc(struct i2c_client *client) { struct max17040_chip *chip = i2c_get_clientdata(client); u16 soc; soc = max17040_read_reg(client, MAX17040_SOC); chip->soc = (soc >> 8); }

Contributors

PersonTokensPropCommitsCommitProp
Minkyu Kang3479.07%150.00%
Liu Xiang920.93%150.00%
Total43100.00%2100.00%


static void max17040_get_version(struct i2c_client *client) { u16 version; version = max17040_read_reg(client, MAX17040_VER); dev_info(&client->dev, "MAX17040 Fuel-Gauge Ver 0x%x\n", version); }

Contributors

PersonTokensPropCommitsCommitProp
Minkyu Kang2982.86%150.00%
Liu Xiang617.14%150.00%
Total35100.00%2100.00%


static void max17040_get_online(struct i2c_client *client) { struct max17040_chip *chip = i2c_get_clientdata(client); if (chip->pdata && chip->pdata->battery_online) chip->online = chip->pdata->battery_online(); else chip->online = 1; }

Contributors

PersonTokensPropCommitsCommitProp
Minkyu Kang4792.16%150.00%
Krzysztof Kozlowski47.84%150.00%
Total51100.00%2100.00%


static void max17040_get_status(struct i2c_client *client) { struct max17040_chip *chip = i2c_get_clientdata(client); if (!chip->pdata || !chip->pdata->charger_online || !chip->pdata->charger_enable) { chip->status = POWER_SUPPLY_STATUS_UNKNOWN; return; } if (chip->pdata->charger_online()) { if (chip->pdata->charger_enable()) chip->status = POWER_SUPPLY_STATUS_CHARGING; else chip->status = POWER_SUPPLY_STATUS_NOT_CHARGING; } else { chip->status = POWER_SUPPLY_STATUS_DISCHARGING; } if (chip->soc > MAX17040_BATTERY_FULL) chip->status = POWER_SUPPLY_STATUS_FULL; }

Contributors

PersonTokensPropCommitsCommitProp
Minkyu Kang10295.33%150.00%
Krzysztof Kozlowski54.67%150.00%
Total107100.00%2100.00%


static void max17040_work(struct work_struct *work) { struct max17040_chip *chip; chip = container_of(work, struct max17040_chip, work.work); max17040_get_vcell(chip->client); max17040_get_soc(chip->client); max17040_get_online(chip->client); max17040_get_status(chip->client); queue_delayed_work(system_power_efficient_wq, &chip->work, MAX17040_DELAY); }

Contributors

PersonTokensPropCommitsCommitProp
Minkyu Kang6795.71%150.00%
Krzysztof Kozlowski34.29%150.00%
Total70100.00%2100.00%

static enum power_supply_property max17040_battery_props[] = { POWER_SUPPLY_PROP_STATUS, POWER_SUPPLY_PROP_ONLINE, POWER_SUPPLY_PROP_VOLTAGE_NOW, POWER_SUPPLY_PROP_CAPACITY, }; static const struct power_supply_desc max17040_battery_desc = { .name = "battery", .type = POWER_SUPPLY_TYPE_BATTERY, .get_property = max17040_get_property, .properties = max17040_battery_props, .num_properties = ARRAY_SIZE(max17040_battery_props), };
static int max17040_probe(struct i2c_client *client, const struct i2c_device_id *id) { struct i2c_adapter *adapter = to_i2c_adapter(client->dev.parent); struct power_supply_config psy_cfg = {}; struct max17040_chip *chip; if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE)) return -EIO; chip = devm_kzalloc(&client->dev, sizeof(*chip), GFP_KERNEL); if (!chip) return -ENOMEM; chip->client = client; chip->pdata = client->dev.platform_data; i2c_set_clientdata(client, chip); psy_cfg.drv_data = chip; chip->battery = power_supply_register(&client->dev, &max17040_battery_desc, &psy_cfg); if (IS_ERR(chip->battery)) { dev_err(&client->dev, "failed: power supply register\n"); return PTR_ERR(chip->battery); } max17040_reset(client); max17040_get_version(client); INIT_DEFERRABLE_WORK(&chip->work, max17040_work); queue_delayed_work(system_power_efficient_wq, &chip->work, MAX17040_DELAY); return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Minkyu Kang16082.47%116.67%
Krzysztof Kozlowski2713.92%350.00%
Devendra Naga63.09%116.67%
Tejun Heo10.52%116.67%
Total194100.00%6100.00%


static int max17040_remove(struct i2c_client *client) { struct max17040_chip *chip = i2c_get_clientdata(client); power_supply_unregister(chip->battery); cancel_delayed_work(&chip->work); return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Minkyu Kang39100.00%1100.00%
Total39100.00%1100.00%

#ifdef CONFIG_PM_SLEEP
static int max17040_suspend(struct device *dev) { struct i2c_client *client = to_i2c_client(dev); struct max17040_chip *chip = i2c_get_clientdata(client); cancel_delayed_work(&chip->work); return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Minkyu Kang3071.43%150.00%
Lars-Peter Clausen1228.57%150.00%
Total42100.00%2100.00%


static int max17040_resume(struct device *dev) { struct i2c_client *client = to_i2c_client(dev); struct max17040_chip *chip = i2c_get_clientdata(client); queue_delayed_work(system_power_efficient_wq, &chip->work, MAX17040_DELAY); return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Minkyu Kang3167.39%133.33%
Lars-Peter Clausen1226.09%133.33%
Krzysztof Kozlowski36.52%133.33%
Total46100.00%3100.00%

static SIMPLE_DEV_PM_OPS(max17040_pm_ops, max17040_suspend, max17040_resume); #define MAX17040_PM_OPS (&max17040_pm_ops) #else #define MAX17040_PM_OPS NULL #endif /* CONFIG_PM_SLEEP */ static const struct i2c_device_id max17040_id[] = { { "max17040" }, { "max77836-battery" }, { } }; MODULE_DEVICE_TABLE(i2c, max17040_id); static struct i2c_driver max17040_i2c_driver = { .driver = { .name = "max17040", .pm = MAX17040_PM_OPS, }, .probe = max17040_probe, .remove = max17040_remove, .id_table = max17040_id, }; module_i2c_driver(max17040_i2c_driver); MODULE_AUTHOR("Minkyu Kang <mk7.kang@samsung.com>"); MODULE_DESCRIPTION("MAX17040 Fuel Gauge"); MODULE_LICENSE("GPL");

Overall Contributors

PersonTokensPropCommitsCommitProp
Minkyu Kang97485.07%18.33%
Krzysztof Kozlowski837.25%541.67%
Lars-Peter Clausen464.02%18.33%
Liu Xiang312.71%18.33%
Devendra Naga60.52%18.33%
Tejun Heo40.35%216.67%
Axel Lin10.09%18.33%
Total1145100.00%12100.00%
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