cregit-Linux how code gets into the kernel

Release 4.11 drivers/power/supply/max8997_charger.c

/*
 * max8997_charger.c - Power supply consumer driver for the Maxim 8997/8966
 *
 *  Copyright (C) 2011 Samsung Electronics
 *  MyungJoo Ham <myungjoo.ham@samsung.com>
 *
 * 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.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */

#include <linux/err.h>
#include <linux/module.h>
#include <linux/slab.h>
#include <linux/platform_device.h>
#include <linux/power_supply.h>
#include <linux/mfd/max8997.h>
#include <linux/mfd/max8997-private.h>


struct charger_data {
	
struct device *dev;
	
struct max8997_dev *iodev;
	
struct power_supply *battery;
};


static enum power_supply_property max8997_battery_props[] = {
	POWER_SUPPLY_PROP_STATUS, /* "FULL" or "NOT FULL" only. */
	POWER_SUPPLY_PROP_PRESENT, /* the presence of battery */
	POWER_SUPPLY_PROP_ONLINE, /* charger is active or not */
};

/* Note that the charger control is done by a current regulator "CHARGER" */

static int max8997_battery_get_property(struct power_supply *psy, enum power_supply_property psp, union power_supply_propval *val) { struct charger_data *charger = power_supply_get_drvdata(psy); struct i2c_client *i2c = charger->iodev->i2c; int ret; u8 reg; switch (psp) { case POWER_SUPPLY_PROP_STATUS: val->intval = 0; ret = max8997_read_reg(i2c, MAX8997_REG_STATUS4, &reg); if (ret) return ret; if ((reg & (1 << 0)) == 0x1) val->intval = POWER_SUPPLY_STATUS_FULL; break; case POWER_SUPPLY_PROP_PRESENT: val->intval = 0; ret = max8997_read_reg(i2c, MAX8997_REG_STATUS4, &reg); if (ret) return ret; if ((reg & (1 << 2)) == 0x0) val->intval = 1; break; case POWER_SUPPLY_PROP_ONLINE: val->intval = 0; ret = max8997_read_reg(i2c, MAX8997_REG_STATUS4, &reg); if (ret) return ret; /* DCINOK */ if (reg & (1 << 1)) val->intval = 1; break; default: return -EINVAL; } return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Donggeun Kim20499.51%150.00%
Krzysztof Kozlowski10.49%150.00%
Total205100.00%2100.00%

static const struct power_supply_desc max8997_battery_desc = { .name = "max8997_pmic", .type = POWER_SUPPLY_TYPE_BATTERY, .get_property = max8997_battery_get_property, .properties = max8997_battery_props, .num_properties = ARRAY_SIZE(max8997_battery_props), };
static int max8997_battery_probe(struct platform_device *pdev) { int ret = 0; struct charger_data *charger; struct max8997_dev *iodev = dev_get_drvdata(pdev->dev.parent); struct max8997_platform_data *pdata = dev_get_platdata(iodev->dev); struct power_supply_config psy_cfg = {}; if (!pdata) return -EINVAL; if (pdata->eoc_mA) { int val = (pdata->eoc_mA - 50) / 10; if (val < 0) val = 0; if (val > 0xf) val = 0xf; ret = max8997_update_reg(iodev->i2c, MAX8997_REG_MBCCTRL5, val, 0xf); if (ret < 0) { dev_err(&pdev->dev, "Cannot use i2c bus.\n"); return ret; } } switch (pdata->timeout) { case 5: ret = max8997_update_reg(iodev->i2c, MAX8997_REG_MBCCTRL1, 0x2 << 4, 0x7 << 4); break; case 6: ret = max8997_update_reg(iodev->i2c, MAX8997_REG_MBCCTRL1, 0x3 << 4, 0x7 << 4); break; case 7: ret = max8997_update_reg(iodev->i2c, MAX8997_REG_MBCCTRL1, 0x4 << 4, 0x7 << 4); break; case 0: ret = max8997_update_reg(iodev->i2c, MAX8997_REG_MBCCTRL1, 0x7 << 4, 0x7 << 4); break; default: dev_err(&pdev->dev, "incorrect timeout value (%d)\n", pdata->timeout); return -EINVAL; } if (ret < 0) { dev_err(&pdev->dev, "Cannot use i2c bus.\n"); return ret; } charger = devm_kzalloc(&pdev->dev, sizeof(struct charger_data), GFP_KERNEL); if (!charger) return -ENOMEM; platform_set_drvdata(pdev, charger); charger->dev = &pdev->dev; charger->iodev = iodev; psy_cfg.drv_data = charger; charger->battery = devm_power_supply_register(&pdev->dev, &max8997_battery_desc, &psy_cfg); if (IS_ERR(charger->battery)) { dev_err(&pdev->dev, "failed: power supply register\n"); return PTR_ERR(charger->battery); } return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Donggeun Kim34289.06%116.67%
Krzysztof Kozlowski318.07%233.33%
Jingoo Han82.08%116.67%
Srikant Ritolia20.52%116.67%
Jonghwan Choi10.26%116.67%
Total384100.00%6100.00%

static const struct platform_device_id max8997_battery_id[] = { { "max8997-battery", 0 }, { } }; MODULE_DEVICE_TABLE(platform, max8997_battery_id); static struct platform_driver max8997_battery_driver = { .driver = { .name = "max8997-battery", }, .probe = max8997_battery_probe, .id_table = max8997_battery_id, };
static int __init max8997_battery_init(void) { return platform_driver_register(&max8997_battery_driver); }

Contributors

PersonTokensPropCommitsCommitProp
Donggeun Kim16100.00%1100.00%
Total16100.00%1100.00%

subsys_initcall(max8997_battery_init);
static void __exit max8997_battery_cleanup(void) { platform_driver_unregister(&max8997_battery_driver); }

Contributors

PersonTokensPropCommitsCommitProp
Donggeun Kim15100.00%1100.00%
Total15100.00%1100.00%

module_exit(max8997_battery_cleanup); MODULE_DESCRIPTION("MAXIM 8997/8966 battery control driver"); MODULE_AUTHOR("MyungJoo Ham <myungjoo.ham@samsung.com>"); MODULE_LICENSE("GPL");

Overall Contributors

PersonTokensPropCommitsCommitProp
Donggeun Kim70088.27%111.11%
Krzysztof Kozlowski698.70%222.22%
Jingoo Han81.01%111.11%
Javier Martinez Canillas70.88%111.11%
Axel Lin60.76%222.22%
Srikant Ritolia20.25%111.11%
Jonghwan Choi10.13%111.11%
Total793100.00%9100.00%
Information contained on this website is for historical information purposes only and does not indicate or represent copyright ownership.
Created with cregit.