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power_supply: Add charger driver for MAX8998/LP3974
This patch supports power supply APIs for MAX8998/LP3974. Signed-off-by: Donggeun Kim <dg77.kim@samsung.com> Signed-off-by: MyungJoo Ham <myungjoo.ham@samsung.com> Signed-off-by: KyungMin Park <kyungmin.park@samsung.com> Acked-by: Samuel Ortiz <sameo@linux.intel.com> Signed-off-by: Anton Vorontsov <cbouatmailru@gmail.com>
This commit is contained in:
Donggeun Kim
Anton Vorontsov
parent
149c077b4b
commit
bb4ce97087
@ -39,6 +39,8 @@ static struct mfd_cell max8998_devs[] = {
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.name = "max8998-pmic",
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}, {
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.name = "max8998-rtc",
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}, {
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.name = "max8998-battery",
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},
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};
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@ -235,4 +235,11 @@ config CHARGER_MAX8997
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Say Y to enable support for the battery charger control sysfs and
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platform data of MAX8997/LP3974 PMICs.
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config CHARGER_MAX8998
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tristate "Maxim MAX8998/LP3974 PMIC battery charger driver"
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depends on MFD_MAX8998 && REGULATOR_MAX8998
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help
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Say Y to enable support for the battery charger control sysfs and
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platform data of MAX8998/LP3974 PMICs.
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endif # POWER_SUPPLY
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@ -36,3 +36,4 @@ obj-$(CONFIG_CHARGER_MAX8903) += max8903_charger.o
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obj-$(CONFIG_CHARGER_TWL4030) += twl4030_charger.o
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obj-$(CONFIG_CHARGER_GPIO) += gpio-charger.o
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obj-$(CONFIG_CHARGER_MAX8997) += max8997_charger.o
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obj-$(CONFIG_CHARGER_MAX8998) += max8998_charger.o
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218
drivers/power/max8998_charger.c
Normal file
218
drivers/power/max8998_charger.c
Normal file
@ -0,0 +1,218 @@
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/*
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* max8998_charger.c - Power supply consumer driver for the Maxim 8998/LP3974
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*
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* Copyright (C) 2009-2010 Samsung Electronics
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* MyungJoo Ham <myungjoo.ham@samsung.com>
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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 as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include <linux/err.h>
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#include <linux/slab.h>
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#include <linux/platform_device.h>
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#include <linux/power_supply.h>
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#include <linux/mfd/max8998.h>
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#include <linux/mfd/max8998-private.h>
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struct max8998_battery_data {
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struct device *dev;
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struct max8998_dev *iodev;
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struct power_supply battery;
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};
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static enum power_supply_property max8998_battery_props[] = {
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POWER_SUPPLY_PROP_PRESENT, /* the presence of battery */
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POWER_SUPPLY_PROP_ONLINE, /* charger is active or not */
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};
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/* Note that the charger control is done by a current regulator "CHARGER" */
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static int max8998_battery_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 max8998_battery_data *max8998 = container_of(psy,
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struct max8998_battery_data, battery);
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struct i2c_client *i2c = max8998->iodev->i2c;
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int ret;
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u8 reg;
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switch (psp) {
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case POWER_SUPPLY_PROP_PRESENT:
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ret = max8998_read_reg(i2c, MAX8998_REG_STATUS2, ®);
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if (ret)
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return ret;
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if (reg & (1 << 4))
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val->intval = 0;
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else
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val->intval = 1;
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break;
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case POWER_SUPPLY_PROP_ONLINE:
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ret = max8998_read_reg(i2c, MAX8998_REG_STATUS2, ®);
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if (ret)
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return ret;
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if (reg & (1 << 3))
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val->intval = 0;
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else
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val->intval = 1;
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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 __devinit int max8998_battery_probe(struct platform_device *pdev)
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{
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struct max8998_dev *iodev = dev_get_drvdata(pdev->dev.parent);
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struct max8998_platform_data *pdata = dev_get_platdata(iodev->dev);
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struct max8998_battery_data *max8998;
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struct i2c_client *i2c;
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int ret = 0;
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if (!pdata) {
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dev_err(pdev->dev.parent, "No platform init data supplied\n");
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return -ENODEV;
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}
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max8998 = kzalloc(sizeof(struct max8998_battery_data), GFP_KERNEL);
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if (!max8998)
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return -ENOMEM;
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max8998->dev = &pdev->dev;
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max8998->iodev = iodev;
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platform_set_drvdata(pdev, max8998);
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i2c = max8998->iodev->i2c;
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/* Setup "End of Charge" */
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/* If EOC value equals 0,
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* remain value set from bootloader or default value */
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if (pdata->eoc >= 10 && pdata->eoc <= 45) {
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max8998_update_reg(i2c, MAX8998_REG_CHGR1,
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(pdata->eoc / 5 - 2) << 5, 0x7 << 5);
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} else if (pdata->eoc == 0) {
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dev_dbg(max8998->dev,
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"EOC value not set: leave it unchanged.\n");
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} else {
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dev_err(max8998->dev, "Invalid EOC value\n");
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ret = -EINVAL;
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goto err;
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}
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/* Setup Charge Restart Level */
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switch (pdata->restart) {
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case 100:
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max8998_update_reg(i2c, MAX8998_REG_CHGR1, 0x1 << 3, 0x3 << 3);
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break;
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case 150:
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max8998_update_reg(i2c, MAX8998_REG_CHGR1, 0x0 << 3, 0x3 << 3);
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break;
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case 200:
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max8998_update_reg(i2c, MAX8998_REG_CHGR1, 0x2 << 3, 0x3 << 3);
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break;
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case -1:
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max8998_update_reg(i2c, MAX8998_REG_CHGR1, 0x3 << 3, 0x3 << 3);
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break;
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case 0:
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dev_dbg(max8998->dev,
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"Restart Level not set: leave it unchanged.\n");
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break;
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default:
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dev_err(max8998->dev, "Invalid Restart Level\n");
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ret = -EINVAL;
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goto err;
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}
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/* Setup Charge Full Timeout */
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switch (pdata->timeout) {
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case 5:
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max8998_update_reg(i2c, MAX8998_REG_CHGR2, 0x0 << 4, 0x3 << 4);
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break;
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case 6:
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max8998_update_reg(i2c, MAX8998_REG_CHGR2, 0x1 << 4, 0x3 << 4);
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break;
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case 7:
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max8998_update_reg(i2c, MAX8998_REG_CHGR2, 0x2 << 4, 0x3 << 4);
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break;
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case -1:
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max8998_update_reg(i2c, MAX8998_REG_CHGR2, 0x3 << 4, 0x3 << 4);
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break;
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case 0:
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dev_dbg(max8998->dev,
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"Full Timeout not set: leave it unchanged.\n");
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default:
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dev_err(max8998->dev, "Invalid Full Timeout value\n");
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ret = -EINVAL;
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goto err;
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}
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max8998->battery.name = "max8998_pmic";
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max8998->battery.type = POWER_SUPPLY_TYPE_BATTERY;
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max8998->battery.get_property = max8998_battery_get_property;
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max8998->battery.properties = max8998_battery_props;
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max8998->battery.num_properties = ARRAY_SIZE(max8998_battery_props);
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ret = power_supply_register(max8998->dev, &max8998->battery);
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if (ret) {
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dev_err(max8998->dev, "failed: power supply register\n");
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goto err;
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}
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return 0;
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err:
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kfree(max8998);
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return ret;
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}
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static int __devexit max8998_battery_remove(struct platform_device *pdev)
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{
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struct max8998_battery_data *max8998 = platform_get_drvdata(pdev);
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power_supply_unregister(&max8998->battery);
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kfree(max8998);
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return 0;
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}
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static const struct platform_device_id max8998_battery_id[] = {
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{ "max8998-battery", TYPE_MAX8998 },
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};
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static struct platform_driver max8998_battery_driver = {
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.driver = {
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.name = "max8998-battery",
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.owner = THIS_MODULE,
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},
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.probe = max8998_battery_probe,
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.remove = __devexit_p(max8998_battery_remove),
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.id_table = max8998_battery_id,
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};
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static int __init max8998_battery_init(void)
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{
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return platform_driver_register(&max8998_battery_driver);
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}
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module_init(max8998_battery_init);
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static void __exit max8998_battery_cleanup(void)
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{
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platform_driver_unregister(&max8998_battery_driver);
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}
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module_exit(max8998_battery_cleanup);
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MODULE_DESCRIPTION("MAXIM 8998 battery control driver");
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MODULE_AUTHOR("MyungJoo Ham <myungjoo.ham@samsung.com>");
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MODULE_LICENSE("GPL");
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MODULE_ALIAS("platform:max8998-battery");
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@ -87,6 +87,15 @@ struct max8998_regulator_data {
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* @wakeup: Allow to wake up from suspend
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* @rtc_delay: LP3974 RTC chip bug that requires delay after a register
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* write before reading it.
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* @eoc: End of Charge Level in percent: 10% ~ 45% by 5% step
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* If it equals 0, leave it unchanged.
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* Otherwise, it is a invalid value.
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* @restart: Restart Level in mV: 100, 150, 200, and -1 for disable.
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* If it equals 0, leave it unchanged.
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* Otherwise, it is a invalid value.
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* @timeout: Full Timeout in hours: 5, 6, 7, and -1 for disable.
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* If it equals 0, leave it unchanged.
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* Otherwise, leave it unchanged.
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*/
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struct max8998_platform_data {
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struct max8998_regulator_data *regulators;
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@ -107,6 +116,9 @@ struct max8998_platform_data {
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int buck2_default_idx;
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bool wakeup;
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bool rtc_delay;
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int eoc;
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int restart;
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int timeout;
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};
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#endif /* __LINUX_MFD_MAX8998_H */
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