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690 lines
17 KiB
690 lines
17 KiB
// SPDX-License-Identifier: GPL-2.0-or-later |
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/* |
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* DA9150 Charger Driver |
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* |
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* Copyright (c) 2014 Dialog Semiconductor |
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* |
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* Author: Adam Thomson <[email protected]> |
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*/ |
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|
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#include <linux/kernel.h> |
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#include <linux/slab.h> |
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#include <linux/module.h> |
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#include <linux/platform_device.h> |
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#include <linux/of.h> |
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#include <linux/of_platform.h> |
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#include <linux/interrupt.h> |
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#include <linux/power_supply.h> |
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#include <linux/notifier.h> |
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#include <linux/usb/phy.h> |
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#include <linux/iio/consumer.h> |
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#include <linux/mfd/da9150/core.h> |
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#include <linux/mfd/da9150/registers.h> |
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|
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/* Private data */ |
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struct da9150_charger { |
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struct da9150 *da9150; |
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struct device *dev; |
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struct power_supply *usb; |
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struct power_supply *battery; |
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struct power_supply *supply_online; |
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struct usb_phy *usb_phy; |
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struct notifier_block otg_nb; |
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struct work_struct otg_work; |
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unsigned long usb_event; |
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struct iio_channel *ibus_chan; |
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struct iio_channel *vbus_chan; |
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struct iio_channel *tjunc_chan; |
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struct iio_channel *vbat_chan; |
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}; |
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static inline int da9150_charger_supply_online(struct da9150_charger *charger, |
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struct power_supply *psy, |
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union power_supply_propval *val) |
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{ |
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val->intval = (psy == charger->supply_online) ? 1 : 0; |
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return 0; |
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} |
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/* Charger Properties */ |
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static int da9150_charger_vbus_voltage_now(struct da9150_charger *charger, |
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union power_supply_propval *val) |
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{ |
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int v_val, ret; |
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/* Read processed value - mV units */ |
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ret = iio_read_channel_processed(charger->vbus_chan, &v_val); |
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if (ret < 0) |
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return ret; |
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/* Convert voltage to expected uV units */ |
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val->intval = v_val * 1000; |
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return 0; |
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} |
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static int da9150_charger_ibus_current_avg(struct da9150_charger *charger, |
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union power_supply_propval *val) |
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{ |
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int i_val, ret; |
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/* Read processed value - mA units */ |
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ret = iio_read_channel_processed(charger->ibus_chan, &i_val); |
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if (ret < 0) |
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return ret; |
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/* Convert current to expected uA units */ |
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val->intval = i_val * 1000; |
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return 0; |
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} |
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static int da9150_charger_tjunc_temp(struct da9150_charger *charger, |
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union power_supply_propval *val) |
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{ |
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int t_val, ret; |
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/* Read processed value - 0.001 degrees C units */ |
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ret = iio_read_channel_processed(charger->tjunc_chan, &t_val); |
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if (ret < 0) |
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return ret; |
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/* Convert temp to expect 0.1 degrees C units */ |
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val->intval = t_val / 100; |
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return 0; |
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} |
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static enum power_supply_property da9150_charger_props[] = { |
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POWER_SUPPLY_PROP_ONLINE, |
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POWER_SUPPLY_PROP_VOLTAGE_NOW, |
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POWER_SUPPLY_PROP_CURRENT_AVG, |
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POWER_SUPPLY_PROP_TEMP, |
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}; |
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static int da9150_charger_get_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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struct da9150_charger *charger = dev_get_drvdata(psy->dev.parent); |
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int ret; |
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switch (psp) { |
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case POWER_SUPPLY_PROP_ONLINE: |
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ret = da9150_charger_supply_online(charger, psy, val); |
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break; |
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case POWER_SUPPLY_PROP_VOLTAGE_NOW: |
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ret = da9150_charger_vbus_voltage_now(charger, val); |
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break; |
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case POWER_SUPPLY_PROP_CURRENT_AVG: |
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ret = da9150_charger_ibus_current_avg(charger, val); |
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break; |
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case POWER_SUPPLY_PROP_TEMP: |
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ret = da9150_charger_tjunc_temp(charger, val); |
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break; |
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default: |
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ret = -EINVAL; |
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break; |
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} |
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return ret; |
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} |
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/* Battery Properties */ |
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static int da9150_charger_battery_status(struct da9150_charger *charger, |
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union power_supply_propval *val) |
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{ |
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u8 reg; |
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/* Check to see if battery is discharging */ |
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reg = da9150_reg_read(charger->da9150, DA9150_STATUS_H); |
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if (((reg & DA9150_VBUS_STAT_MASK) == DA9150_VBUS_STAT_OFF) || |
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((reg & DA9150_VBUS_STAT_MASK) == DA9150_VBUS_STAT_WAIT)) { |
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val->intval = POWER_SUPPLY_STATUS_DISCHARGING; |
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return 0; |
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} |
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reg = da9150_reg_read(charger->da9150, DA9150_STATUS_J); |
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/* Now check for other states */ |
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switch (reg & DA9150_CHG_STAT_MASK) { |
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case DA9150_CHG_STAT_ACT: |
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case DA9150_CHG_STAT_PRE: |
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case DA9150_CHG_STAT_CC: |
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case DA9150_CHG_STAT_CV: |
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val->intval = POWER_SUPPLY_STATUS_CHARGING; |
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break; |
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case DA9150_CHG_STAT_OFF: |
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case DA9150_CHG_STAT_SUSP: |
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case DA9150_CHG_STAT_TEMP: |
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case DA9150_CHG_STAT_TIME: |
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case DA9150_CHG_STAT_BAT: |
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val->intval = POWER_SUPPLY_STATUS_NOT_CHARGING; |
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break; |
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case DA9150_CHG_STAT_FULL: |
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val->intval = POWER_SUPPLY_STATUS_FULL; |
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break; |
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default: |
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val->intval = POWER_SUPPLY_STATUS_UNKNOWN; |
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break; |
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} |
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return 0; |
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} |
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static int da9150_charger_battery_health(struct da9150_charger *charger, |
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union power_supply_propval *val) |
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{ |
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u8 reg; |
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reg = da9150_reg_read(charger->da9150, DA9150_STATUS_J); |
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/* Check if temperature limit reached */ |
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switch (reg & DA9150_CHG_TEMP_MASK) { |
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case DA9150_CHG_TEMP_UNDER: |
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val->intval = POWER_SUPPLY_HEALTH_COLD; |
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return 0; |
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case DA9150_CHG_TEMP_OVER: |
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val->intval = POWER_SUPPLY_HEALTH_OVERHEAT; |
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return 0; |
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default: |
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break; |
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} |
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/* Check for other health states */ |
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switch (reg & DA9150_CHG_STAT_MASK) { |
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case DA9150_CHG_STAT_ACT: |
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case DA9150_CHG_STAT_PRE: |
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val->intval = POWER_SUPPLY_HEALTH_DEAD; |
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break; |
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case DA9150_CHG_STAT_TIME: |
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val->intval = POWER_SUPPLY_HEALTH_UNSPEC_FAILURE; |
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break; |
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default: |
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val->intval = POWER_SUPPLY_HEALTH_GOOD; |
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break; |
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} |
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return 0; |
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} |
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static int da9150_charger_battery_present(struct da9150_charger *charger, |
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union power_supply_propval *val) |
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{ |
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u8 reg; |
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/* Check if battery present or removed */ |
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reg = da9150_reg_read(charger->da9150, DA9150_STATUS_J); |
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if ((reg & DA9150_CHG_STAT_MASK) == DA9150_CHG_STAT_BAT) |
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val->intval = 0; |
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else |
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val->intval = 1; |
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return 0; |
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} |
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static int da9150_charger_battery_charge_type(struct da9150_charger *charger, |
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union power_supply_propval *val) |
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{ |
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u8 reg; |
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reg = da9150_reg_read(charger->da9150, DA9150_STATUS_J); |
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switch (reg & DA9150_CHG_STAT_MASK) { |
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case DA9150_CHG_STAT_CC: |
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val->intval = POWER_SUPPLY_CHARGE_TYPE_FAST; |
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break; |
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case DA9150_CHG_STAT_ACT: |
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case DA9150_CHG_STAT_PRE: |
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case DA9150_CHG_STAT_CV: |
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val->intval = POWER_SUPPLY_CHARGE_TYPE_TRICKLE; |
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break; |
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default: |
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val->intval = POWER_SUPPLY_CHARGE_TYPE_NONE; |
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break; |
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} |
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return 0; |
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} |
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static int da9150_charger_battery_voltage_min(struct da9150_charger *charger, |
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union power_supply_propval *val) |
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{ |
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u8 reg; |
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reg = da9150_reg_read(charger->da9150, DA9150_PPR_CHGCTRL_C); |
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/* Value starts at 2500 mV, 50 mV increments, presented in uV */ |
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val->intval = ((reg & DA9150_CHG_VFAULT_MASK) * 50000) + 2500000; |
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return 0; |
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} |
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static int da9150_charger_battery_voltage_now(struct da9150_charger *charger, |
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union power_supply_propval *val) |
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{ |
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int v_val, ret; |
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/* Read processed value - mV units */ |
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ret = iio_read_channel_processed(charger->vbat_chan, &v_val); |
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if (ret < 0) |
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return ret; |
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val->intval = v_val * 1000; |
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return 0; |
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} |
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static int da9150_charger_battery_current_max(struct da9150_charger *charger, |
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union power_supply_propval *val) |
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{ |
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int reg; |
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reg = da9150_reg_read(charger->da9150, DA9150_PPR_CHGCTRL_D); |
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/* 25mA increments */ |
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val->intval = reg * 25000; |
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return 0; |
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} |
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static int da9150_charger_battery_voltage_max(struct da9150_charger *charger, |
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union power_supply_propval *val) |
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{ |
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u8 reg; |
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reg = da9150_reg_read(charger->da9150, DA9150_PPR_CHGCTRL_B); |
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/* Value starts at 3650 mV, 25 mV increments, presented in uV */ |
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val->intval = ((reg & DA9150_CHG_VBAT_MASK) * 25000) + 3650000; |
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return 0; |
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} |
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static enum power_supply_property da9150_charger_bat_props[] = { |
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POWER_SUPPLY_PROP_STATUS, |
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POWER_SUPPLY_PROP_ONLINE, |
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POWER_SUPPLY_PROP_HEALTH, |
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POWER_SUPPLY_PROP_PRESENT, |
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POWER_SUPPLY_PROP_CHARGE_TYPE, |
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POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN, |
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POWER_SUPPLY_PROP_VOLTAGE_NOW, |
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POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX, |
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POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX, |
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}; |
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static int da9150_charger_battery_get_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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struct da9150_charger *charger = dev_get_drvdata(psy->dev.parent); |
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int ret; |
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switch (psp) { |
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case POWER_SUPPLY_PROP_STATUS: |
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ret = da9150_charger_battery_status(charger, val); |
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break; |
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case POWER_SUPPLY_PROP_ONLINE: |
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ret = da9150_charger_supply_online(charger, psy, val); |
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break; |
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case POWER_SUPPLY_PROP_HEALTH: |
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ret = da9150_charger_battery_health(charger, val); |
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break; |
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case POWER_SUPPLY_PROP_PRESENT: |
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ret = da9150_charger_battery_present(charger, val); |
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break; |
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case POWER_SUPPLY_PROP_CHARGE_TYPE: |
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ret = da9150_charger_battery_charge_type(charger, val); |
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break; |
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case POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN: |
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ret = da9150_charger_battery_voltage_min(charger, val); |
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break; |
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case POWER_SUPPLY_PROP_VOLTAGE_NOW: |
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ret = da9150_charger_battery_voltage_now(charger, val); |
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break; |
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case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX: |
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ret = da9150_charger_battery_current_max(charger, val); |
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break; |
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case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX: |
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ret = da9150_charger_battery_voltage_max(charger, val); |
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break; |
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default: |
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ret = -EINVAL; |
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break; |
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} |
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return ret; |
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} |
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static irqreturn_t da9150_charger_chg_irq(int irq, void *data) |
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{ |
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struct da9150_charger *charger = data; |
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power_supply_changed(charger->battery); |
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return IRQ_HANDLED; |
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} |
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static irqreturn_t da9150_charger_tjunc_irq(int irq, void *data) |
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{ |
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struct da9150_charger *charger = data; |
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/* Nothing we can really do except report this. */ |
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dev_crit(charger->dev, "TJunc over temperature!!!\n"); |
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power_supply_changed(charger->usb); |
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return IRQ_HANDLED; |
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} |
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static irqreturn_t da9150_charger_vfault_irq(int irq, void *data) |
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{ |
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struct da9150_charger *charger = data; |
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/* Nothing we can really do except report this. */ |
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dev_crit(charger->dev, "VSYS under voltage!!!\n"); |
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power_supply_changed(charger->usb); |
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power_supply_changed(charger->battery); |
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return IRQ_HANDLED; |
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} |
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static irqreturn_t da9150_charger_vbus_irq(int irq, void *data) |
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{ |
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struct da9150_charger *charger = data; |
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u8 reg; |
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reg = da9150_reg_read(charger->da9150, DA9150_STATUS_H); |
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/* Charger plugged in or battery only */ |
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switch (reg & DA9150_VBUS_STAT_MASK) { |
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case DA9150_VBUS_STAT_OFF: |
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case DA9150_VBUS_STAT_WAIT: |
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charger->supply_online = charger->battery; |
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break; |
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case DA9150_VBUS_STAT_CHG: |
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charger->supply_online = charger->usb; |
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break; |
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default: |
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dev_warn(charger->dev, "Unknown VBUS state - reg = 0x%x\n", |
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reg); |
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charger->supply_online = NULL; |
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break; |
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} |
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power_supply_changed(charger->usb); |
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power_supply_changed(charger->battery); |
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return IRQ_HANDLED; |
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} |
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static void da9150_charger_otg_work(struct work_struct *data) |
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{ |
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struct da9150_charger *charger = |
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container_of(data, struct da9150_charger, otg_work); |
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switch (charger->usb_event) { |
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case USB_EVENT_ID: |
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/* Enable OTG Boost */ |
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da9150_set_bits(charger->da9150, DA9150_PPR_BKCTRL_A, |
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DA9150_VBUS_MODE_MASK, DA9150_VBUS_MODE_OTG); |
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break; |
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case USB_EVENT_NONE: |
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/* Revert to charge mode */ |
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power_supply_changed(charger->usb); |
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power_supply_changed(charger->battery); |
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da9150_set_bits(charger->da9150, DA9150_PPR_BKCTRL_A, |
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DA9150_VBUS_MODE_MASK, DA9150_VBUS_MODE_CHG); |
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break; |
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} |
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} |
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static int da9150_charger_otg_ncb(struct notifier_block *nb, unsigned long val, |
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void *priv) |
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{ |
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struct da9150_charger *charger = |
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container_of(nb, struct da9150_charger, otg_nb); |
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dev_dbg(charger->dev, "DA9150 OTG notify %lu\n", val); |
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charger->usb_event = val; |
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schedule_work(&charger->otg_work); |
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return NOTIFY_OK; |
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} |
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static int da9150_charger_register_irq(struct platform_device *pdev, |
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irq_handler_t handler, |
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const char *irq_name) |
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{ |
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struct device *dev = &pdev->dev; |
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struct da9150_charger *charger = platform_get_drvdata(pdev); |
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int irq, ret; |
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irq = platform_get_irq_byname(pdev, irq_name); |
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if (irq < 0) { |
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dev_err(dev, "Failed to get IRQ CHG_STATUS: %d\n", irq); |
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return irq; |
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} |
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ret = request_threaded_irq(irq, NULL, handler, IRQF_ONESHOT, irq_name, |
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charger); |
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if (ret) |
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dev_err(dev, "Failed to request IRQ %d: %d\n", irq, ret); |
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return ret; |
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} |
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static void da9150_charger_unregister_irq(struct platform_device *pdev, |
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const char *irq_name) |
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{ |
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struct device *dev = &pdev->dev; |
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struct da9150_charger *charger = platform_get_drvdata(pdev); |
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int irq; |
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irq = platform_get_irq_byname(pdev, irq_name); |
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if (irq < 0) { |
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dev_err(dev, "Failed to get IRQ CHG_STATUS: %d\n", irq); |
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return; |
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} |
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free_irq(irq, charger); |
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} |
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static const struct power_supply_desc usb_desc = { |
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.name = "da9150-usb", |
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.type = POWER_SUPPLY_TYPE_USB, |
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.properties = da9150_charger_props, |
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.num_properties = ARRAY_SIZE(da9150_charger_props), |
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.get_property = da9150_charger_get_prop, |
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}; |
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static const struct power_supply_desc battery_desc = { |
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.name = "da9150-battery", |
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.type = POWER_SUPPLY_TYPE_BATTERY, |
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.properties = da9150_charger_bat_props, |
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.num_properties = ARRAY_SIZE(da9150_charger_bat_props), |
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.get_property = da9150_charger_battery_get_prop, |
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}; |
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static int da9150_charger_probe(struct platform_device *pdev) |
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{ |
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struct device *dev = &pdev->dev; |
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struct da9150 *da9150 = dev_get_drvdata(dev->parent); |
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struct da9150_charger *charger; |
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u8 reg; |
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int ret; |
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charger = devm_kzalloc(dev, sizeof(struct da9150_charger), GFP_KERNEL); |
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if (!charger) |
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return -ENOMEM; |
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platform_set_drvdata(pdev, charger); |
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charger->da9150 = da9150; |
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charger->dev = dev; |
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|
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/* Acquire ADC channels */ |
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charger->ibus_chan = iio_channel_get(dev, "CHAN_IBUS"); |
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if (IS_ERR(charger->ibus_chan)) { |
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ret = PTR_ERR(charger->ibus_chan); |
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goto ibus_chan_fail; |
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} |
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charger->vbus_chan = iio_channel_get(dev, "CHAN_VBUS"); |
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if (IS_ERR(charger->vbus_chan)) { |
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ret = PTR_ERR(charger->vbus_chan); |
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goto vbus_chan_fail; |
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} |
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|
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charger->tjunc_chan = iio_channel_get(dev, "CHAN_TJUNC"); |
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if (IS_ERR(charger->tjunc_chan)) { |
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ret = PTR_ERR(charger->tjunc_chan); |
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goto tjunc_chan_fail; |
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} |
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|
|
charger->vbat_chan = iio_channel_get(dev, "CHAN_VBAT"); |
|
if (IS_ERR(charger->vbat_chan)) { |
|
ret = PTR_ERR(charger->vbat_chan); |
|
goto vbat_chan_fail; |
|
} |
|
|
|
/* Register power supplies */ |
|
charger->usb = power_supply_register(dev, &usb_desc, NULL); |
|
if (IS_ERR(charger->usb)) { |
|
ret = PTR_ERR(charger->usb); |
|
goto usb_fail; |
|
} |
|
|
|
charger->battery = power_supply_register(dev, &battery_desc, NULL); |
|
if (IS_ERR(charger->battery)) { |
|
ret = PTR_ERR(charger->battery); |
|
goto battery_fail; |
|
} |
|
|
|
/* Get initial online supply */ |
|
reg = da9150_reg_read(da9150, DA9150_STATUS_H); |
|
|
|
switch (reg & DA9150_VBUS_STAT_MASK) { |
|
case DA9150_VBUS_STAT_OFF: |
|
case DA9150_VBUS_STAT_WAIT: |
|
charger->supply_online = charger->battery; |
|
break; |
|
case DA9150_VBUS_STAT_CHG: |
|
charger->supply_online = charger->usb; |
|
break; |
|
default: |
|
dev_warn(dev, "Unknown VBUS state - reg = 0x%x\n", reg); |
|
charger->supply_online = NULL; |
|
break; |
|
} |
|
|
|
/* Setup OTG reporting & configuration */ |
|
charger->usb_phy = devm_usb_get_phy(dev, USB_PHY_TYPE_USB2); |
|
if (!IS_ERR_OR_NULL(charger->usb_phy)) { |
|
INIT_WORK(&charger->otg_work, da9150_charger_otg_work); |
|
charger->otg_nb.notifier_call = da9150_charger_otg_ncb; |
|
usb_register_notifier(charger->usb_phy, &charger->otg_nb); |
|
} |
|
|
|
/* Register IRQs */ |
|
ret = da9150_charger_register_irq(pdev, da9150_charger_chg_irq, |
|
"CHG_STATUS"); |
|
if (ret < 0) |
|
goto chg_irq_fail; |
|
|
|
ret = da9150_charger_register_irq(pdev, da9150_charger_tjunc_irq, |
|
"CHG_TJUNC"); |
|
if (ret < 0) |
|
goto tjunc_irq_fail; |
|
|
|
ret = da9150_charger_register_irq(pdev, da9150_charger_vfault_irq, |
|
"CHG_VFAULT"); |
|
if (ret < 0) |
|
goto vfault_irq_fail; |
|
|
|
ret = da9150_charger_register_irq(pdev, da9150_charger_vbus_irq, |
|
"CHG_VBUS"); |
|
if (ret < 0) |
|
goto vbus_irq_fail; |
|
|
|
return 0; |
|
|
|
|
|
vbus_irq_fail: |
|
da9150_charger_unregister_irq(pdev, "CHG_VFAULT"); |
|
vfault_irq_fail: |
|
da9150_charger_unregister_irq(pdev, "CHG_TJUNC"); |
|
tjunc_irq_fail: |
|
da9150_charger_unregister_irq(pdev, "CHG_STATUS"); |
|
chg_irq_fail: |
|
if (!IS_ERR_OR_NULL(charger->usb_phy)) |
|
usb_unregister_notifier(charger->usb_phy, &charger->otg_nb); |
|
battery_fail: |
|
power_supply_unregister(charger->usb); |
|
|
|
usb_fail: |
|
iio_channel_release(charger->vbat_chan); |
|
|
|
vbat_chan_fail: |
|
iio_channel_release(charger->tjunc_chan); |
|
|
|
tjunc_chan_fail: |
|
iio_channel_release(charger->vbus_chan); |
|
|
|
vbus_chan_fail: |
|
iio_channel_release(charger->ibus_chan); |
|
|
|
ibus_chan_fail: |
|
return ret; |
|
} |
|
|
|
static int da9150_charger_remove(struct platform_device *pdev) |
|
{ |
|
struct da9150_charger *charger = platform_get_drvdata(pdev); |
|
int irq; |
|
|
|
/* Make sure IRQs are released before unregistering power supplies */ |
|
irq = platform_get_irq_byname(pdev, "CHG_VBUS"); |
|
free_irq(irq, charger); |
|
|
|
irq = platform_get_irq_byname(pdev, "CHG_VFAULT"); |
|
free_irq(irq, charger); |
|
|
|
irq = platform_get_irq_byname(pdev, "CHG_TJUNC"); |
|
free_irq(irq, charger); |
|
|
|
irq = platform_get_irq_byname(pdev, "CHG_STATUS"); |
|
free_irq(irq, charger); |
|
|
|
if (!IS_ERR_OR_NULL(charger->usb_phy)) |
|
usb_unregister_notifier(charger->usb_phy, &charger->otg_nb); |
|
|
|
power_supply_unregister(charger->battery); |
|
power_supply_unregister(charger->usb); |
|
|
|
/* Release ADC channels */ |
|
iio_channel_release(charger->ibus_chan); |
|
iio_channel_release(charger->vbus_chan); |
|
iio_channel_release(charger->tjunc_chan); |
|
iio_channel_release(charger->vbat_chan); |
|
|
|
return 0; |
|
} |
|
|
|
static struct platform_driver da9150_charger_driver = { |
|
.driver = { |
|
.name = "da9150-charger", |
|
}, |
|
.probe = da9150_charger_probe, |
|
.remove = da9150_charger_remove, |
|
}; |
|
|
|
module_platform_driver(da9150_charger_driver); |
|
|
|
MODULE_DESCRIPTION("Charger Driver for DA9150"); |
|
MODULE_AUTHOR("Adam Thomson <[email protected]>"); |
|
MODULE_LICENSE("GPL");
|
|
|