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741 lines
18 KiB
741 lines
18 KiB
// SPDX-License-Identifier: GPL-2.0-only |
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/* |
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* TI LP8788 MFD - battery charger driver |
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* |
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* Copyright 2012 Texas Instruments |
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* |
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* Author: Milo(Woogyom) Kim <[email protected]> |
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*/ |
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|
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#include <linux/err.h> |
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#include <linux/iio/consumer.h> |
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#include <linux/interrupt.h> |
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#include <linux/irqdomain.h> |
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#include <linux/mfd/lp8788.h> |
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#include <linux/module.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/slab.h> |
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#include <linux/workqueue.h> |
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|
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/* register address */ |
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#define LP8788_CHG_STATUS 0x07 |
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#define LP8788_CHG_IDCIN 0x13 |
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#define LP8788_CHG_IBATT 0x14 |
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#define LP8788_CHG_VTERM 0x15 |
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#define LP8788_CHG_EOC 0x16 |
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|
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/* mask/shift bits */ |
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#define LP8788_CHG_INPUT_STATE_M 0x03 /* Addr 07h */ |
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#define LP8788_CHG_STATE_M 0x3C |
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#define LP8788_CHG_STATE_S 2 |
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#define LP8788_NO_BATT_M BIT(6) |
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#define LP8788_BAD_BATT_M BIT(7) |
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#define LP8788_CHG_IBATT_M 0x1F /* Addr 14h */ |
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#define LP8788_CHG_VTERM_M 0x0F /* Addr 15h */ |
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#define LP8788_CHG_EOC_LEVEL_M 0x30 /* Addr 16h */ |
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#define LP8788_CHG_EOC_LEVEL_S 4 |
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#define LP8788_CHG_EOC_TIME_M 0x0E |
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#define LP8788_CHG_EOC_TIME_S 1 |
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#define LP8788_CHG_EOC_MODE_M BIT(0) |
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#define LP8788_CHARGER_NAME "charger" |
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#define LP8788_BATTERY_NAME "main_batt" |
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#define LP8788_CHG_START 0x11 |
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#define LP8788_CHG_END 0x1C |
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#define LP8788_ISEL_MAX 23 |
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#define LP8788_ISEL_STEP 50 |
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#define LP8788_VTERM_MIN 4100 |
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#define LP8788_VTERM_STEP 25 |
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#define LP8788_MAX_BATT_CAPACITY 100 |
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#define LP8788_MAX_CHG_IRQS 11 |
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|
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enum lp8788_charging_state { |
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LP8788_OFF, |
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LP8788_WARM_UP, |
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LP8788_LOW_INPUT = 0x3, |
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LP8788_PRECHARGE, |
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LP8788_CC, |
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LP8788_CV, |
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LP8788_MAINTENANCE, |
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LP8788_BATTERY_FAULT, |
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LP8788_SYSTEM_SUPPORT = 0xC, |
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LP8788_HIGH_CURRENT = 0xF, |
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LP8788_MAX_CHG_STATE, |
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}; |
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enum lp8788_charger_adc_sel { |
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LP8788_VBATT, |
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LP8788_BATT_TEMP, |
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LP8788_NUM_CHG_ADC, |
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}; |
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|
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enum lp8788_charger_input_state { |
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LP8788_SYSTEM_SUPPLY = 1, |
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LP8788_FULL_FUNCTION, |
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}; |
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|
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/* |
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* struct lp8788_chg_irq |
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* @which : lp8788 interrupt id |
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* @virq : Linux IRQ number from irq_domain |
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*/ |
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struct lp8788_chg_irq { |
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enum lp8788_int_id which; |
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int virq; |
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}; |
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|
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/* |
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* struct lp8788_charger |
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* @lp : used for accessing the registers of mfd lp8788 device |
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* @charger : power supply driver for the battery charger |
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* @battery : power supply driver for the battery |
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* @charger_work : work queue for charger input interrupts |
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* @chan : iio channels for getting adc values |
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* eg) battery voltage, capacity and temperature |
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* @irqs : charger dedicated interrupts |
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* @num_irqs : total numbers of charger interrupts |
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* @pdata : charger platform specific data |
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*/ |
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struct lp8788_charger { |
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struct lp8788 *lp; |
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struct power_supply *charger; |
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struct power_supply *battery; |
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struct work_struct charger_work; |
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struct iio_channel *chan[LP8788_NUM_CHG_ADC]; |
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struct lp8788_chg_irq irqs[LP8788_MAX_CHG_IRQS]; |
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int num_irqs; |
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struct lp8788_charger_platform_data *pdata; |
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}; |
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|
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static char *battery_supplied_to[] = { |
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LP8788_BATTERY_NAME, |
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}; |
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static enum power_supply_property lp8788_charger_prop[] = { |
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POWER_SUPPLY_PROP_ONLINE, |
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POWER_SUPPLY_PROP_CURRENT_MAX, |
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}; |
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static enum power_supply_property lp8788_battery_prop[] = { |
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POWER_SUPPLY_PROP_STATUS, |
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POWER_SUPPLY_PROP_HEALTH, |
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POWER_SUPPLY_PROP_PRESENT, |
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POWER_SUPPLY_PROP_VOLTAGE_NOW, |
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POWER_SUPPLY_PROP_CAPACITY, |
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POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT, |
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POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX, |
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POWER_SUPPLY_PROP_TEMP, |
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}; |
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static bool lp8788_is_charger_detected(struct lp8788_charger *pchg) |
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{ |
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u8 data; |
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lp8788_read_byte(pchg->lp, LP8788_CHG_STATUS, &data); |
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data &= LP8788_CHG_INPUT_STATE_M; |
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|
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return data == LP8788_SYSTEM_SUPPLY || data == LP8788_FULL_FUNCTION; |
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} |
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static int lp8788_charger_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 lp8788_charger *pchg = dev_get_drvdata(psy->dev.parent); |
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u8 read; |
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|
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switch (psp) { |
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case POWER_SUPPLY_PROP_ONLINE: |
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val->intval = lp8788_is_charger_detected(pchg); |
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break; |
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case POWER_SUPPLY_PROP_CURRENT_MAX: |
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lp8788_read_byte(pchg->lp, LP8788_CHG_IDCIN, &read); |
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val->intval = LP8788_ISEL_STEP * |
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(min_t(int, read, LP8788_ISEL_MAX) + 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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|
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return 0; |
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} |
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static int lp8788_get_battery_status(struct lp8788_charger *pchg, |
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union power_supply_propval *val) |
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{ |
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enum lp8788_charging_state state; |
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u8 data; |
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int ret; |
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|
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ret = lp8788_read_byte(pchg->lp, LP8788_CHG_STATUS, &data); |
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if (ret) |
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return ret; |
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state = (data & LP8788_CHG_STATE_M) >> LP8788_CHG_STATE_S; |
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switch (state) { |
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case LP8788_OFF: |
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val->intval = POWER_SUPPLY_STATUS_DISCHARGING; |
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break; |
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case LP8788_PRECHARGE: |
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case LP8788_CC: |
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case LP8788_CV: |
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case LP8788_HIGH_CURRENT: |
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val->intval = POWER_SUPPLY_STATUS_CHARGING; |
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break; |
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case LP8788_MAINTENANCE: |
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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_NOT_CHARGING; |
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break; |
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} |
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|
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return 0; |
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} |
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static int lp8788_get_battery_health(struct lp8788_charger *pchg, |
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union power_supply_propval *val) |
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{ |
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u8 data; |
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int ret; |
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ret = lp8788_read_byte(pchg->lp, LP8788_CHG_STATUS, &data); |
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if (ret) |
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return ret; |
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if (data & LP8788_NO_BATT_M) |
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val->intval = POWER_SUPPLY_HEALTH_UNSPEC_FAILURE; |
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else if (data & LP8788_BAD_BATT_M) |
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val->intval = POWER_SUPPLY_HEALTH_DEAD; |
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else |
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val->intval = POWER_SUPPLY_HEALTH_GOOD; |
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|
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return 0; |
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} |
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static int lp8788_get_battery_present(struct lp8788_charger *pchg, |
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union power_supply_propval *val) |
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{ |
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u8 data; |
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int ret; |
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ret = lp8788_read_byte(pchg->lp, LP8788_CHG_STATUS, &data); |
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if (ret) |
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return ret; |
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val->intval = !(data & LP8788_NO_BATT_M); |
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return 0; |
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} |
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static int lp8788_get_vbatt_adc(struct lp8788_charger *pchg, int *result) |
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{ |
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struct iio_channel *channel = pchg->chan[LP8788_VBATT]; |
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|
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if (!channel) |
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return -EINVAL; |
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return iio_read_channel_processed(channel, result); |
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} |
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static int lp8788_get_battery_voltage(struct lp8788_charger *pchg, |
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union power_supply_propval *val) |
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{ |
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return lp8788_get_vbatt_adc(pchg, &val->intval); |
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} |
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static int lp8788_get_battery_capacity(struct lp8788_charger *pchg, |
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union power_supply_propval *val) |
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{ |
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struct lp8788 *lp = pchg->lp; |
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struct lp8788_charger_platform_data *pdata = pchg->pdata; |
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unsigned int max_vbatt; |
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int vbatt; |
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enum lp8788_charging_state state; |
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u8 data; |
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int ret; |
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if (!pdata) |
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return -EINVAL; |
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max_vbatt = pdata->max_vbatt_mv; |
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if (max_vbatt == 0) |
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return -EINVAL; |
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ret = lp8788_read_byte(lp, LP8788_CHG_STATUS, &data); |
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if (ret) |
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return ret; |
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state = (data & LP8788_CHG_STATE_M) >> LP8788_CHG_STATE_S; |
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if (state == LP8788_MAINTENANCE) { |
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val->intval = LP8788_MAX_BATT_CAPACITY; |
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} else { |
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ret = lp8788_get_vbatt_adc(pchg, &vbatt); |
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if (ret) |
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return ret; |
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val->intval = (vbatt * LP8788_MAX_BATT_CAPACITY) / max_vbatt; |
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val->intval = min(val->intval, LP8788_MAX_BATT_CAPACITY); |
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} |
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return 0; |
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} |
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static int lp8788_get_battery_temperature(struct lp8788_charger *pchg, |
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union power_supply_propval *val) |
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{ |
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struct iio_channel *channel = pchg->chan[LP8788_BATT_TEMP]; |
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int result; |
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int ret; |
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if (!channel) |
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return -EINVAL; |
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ret = iio_read_channel_processed(channel, &result); |
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if (ret < 0) |
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return -EINVAL; |
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/* unit: 0.1 'C */ |
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val->intval = result * 10; |
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return 0; |
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} |
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static int lp8788_get_battery_charging_current(struct lp8788_charger *pchg, |
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union power_supply_propval *val) |
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{ |
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u8 read; |
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lp8788_read_byte(pchg->lp, LP8788_CHG_IBATT, &read); |
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read &= LP8788_CHG_IBATT_M; |
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val->intval = LP8788_ISEL_STEP * |
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(min_t(int, read, LP8788_ISEL_MAX) + 1); |
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return 0; |
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} |
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static int lp8788_get_charging_termination_voltage(struct lp8788_charger *pchg, |
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union power_supply_propval *val) |
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{ |
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u8 read; |
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lp8788_read_byte(pchg->lp, LP8788_CHG_VTERM, &read); |
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read &= LP8788_CHG_VTERM_M; |
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val->intval = LP8788_VTERM_MIN + LP8788_VTERM_STEP * read; |
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return 0; |
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} |
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static int lp8788_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 lp8788_charger *pchg = dev_get_drvdata(psy->dev.parent); |
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|
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switch (psp) { |
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case POWER_SUPPLY_PROP_STATUS: |
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return lp8788_get_battery_status(pchg, val); |
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case POWER_SUPPLY_PROP_HEALTH: |
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return lp8788_get_battery_health(pchg, val); |
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case POWER_SUPPLY_PROP_PRESENT: |
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return lp8788_get_battery_present(pchg, val); |
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case POWER_SUPPLY_PROP_VOLTAGE_NOW: |
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return lp8788_get_battery_voltage(pchg, val); |
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case POWER_SUPPLY_PROP_CAPACITY: |
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return lp8788_get_battery_capacity(pchg, val); |
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case POWER_SUPPLY_PROP_TEMP: |
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return lp8788_get_battery_temperature(pchg, val); |
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case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT: |
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return lp8788_get_battery_charging_current(pchg, val); |
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case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX: |
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return lp8788_get_charging_termination_voltage(pchg, val); |
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default: |
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return -EINVAL; |
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} |
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} |
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|
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static inline bool lp8788_is_valid_charger_register(u8 addr) |
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{ |
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return addr >= LP8788_CHG_START && addr <= LP8788_CHG_END; |
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} |
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|
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static int lp8788_update_charger_params(struct platform_device *pdev, |
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struct lp8788_charger *pchg) |
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{ |
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struct lp8788 *lp = pchg->lp; |
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struct lp8788_charger_platform_data *pdata = pchg->pdata; |
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struct lp8788_chg_param *param; |
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int i; |
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int ret; |
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|
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if (!pdata || !pdata->chg_params) { |
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dev_info(&pdev->dev, "skip updating charger parameters\n"); |
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return 0; |
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} |
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|
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/* settting charging parameters */ |
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for (i = 0; i < pdata->num_chg_params; i++) { |
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param = pdata->chg_params + i; |
|
|
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if (lp8788_is_valid_charger_register(param->addr)) { |
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ret = lp8788_write_byte(lp, param->addr, param->val); |
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if (ret) |
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return ret; |
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} |
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} |
|
|
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return 0; |
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} |
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|
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static const struct power_supply_desc lp8788_psy_charger_desc = { |
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.name = LP8788_CHARGER_NAME, |
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.type = POWER_SUPPLY_TYPE_MAINS, |
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.properties = lp8788_charger_prop, |
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.num_properties = ARRAY_SIZE(lp8788_charger_prop), |
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.get_property = lp8788_charger_get_property, |
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}; |
|
|
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static const struct power_supply_desc lp8788_psy_battery_desc = { |
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.name = LP8788_BATTERY_NAME, |
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.type = POWER_SUPPLY_TYPE_BATTERY, |
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.properties = lp8788_battery_prop, |
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.num_properties = ARRAY_SIZE(lp8788_battery_prop), |
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.get_property = lp8788_battery_get_property, |
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}; |
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|
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static void lp8788_psy_unregister(struct lp8788_charger *pchg) |
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{ |
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power_supply_unregister(pchg->battery); |
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power_supply_unregister(pchg->charger); |
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} |
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|
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static void lp8788_charger_event(struct work_struct *work) |
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{ |
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struct lp8788_charger *pchg = |
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container_of(work, struct lp8788_charger, charger_work); |
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struct lp8788_charger_platform_data *pdata = pchg->pdata; |
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enum lp8788_charger_event event = lp8788_is_charger_detected(pchg); |
|
|
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pdata->charger_event(pchg->lp, event); |
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} |
|
|
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static bool lp8788_find_irq_id(struct lp8788_charger *pchg, int virq, int *id) |
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{ |
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bool found = false; |
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int i; |
|
|
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for (i = 0; i < pchg->num_irqs; i++) { |
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if (pchg->irqs[i].virq == virq) { |
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*id = pchg->irqs[i].which; |
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found = true; |
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break; |
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} |
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} |
|
|
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return found; |
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} |
|
|
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static irqreturn_t lp8788_charger_irq_thread(int virq, void *ptr) |
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{ |
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struct lp8788_charger *pchg = ptr; |
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struct lp8788_charger_platform_data *pdata = pchg->pdata; |
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int id = -1; |
|
|
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if (!lp8788_find_irq_id(pchg, virq, &id)) |
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return IRQ_NONE; |
|
|
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switch (id) { |
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case LP8788_INT_CHG_INPUT_STATE: |
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case LP8788_INT_CHG_STATE: |
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case LP8788_INT_EOC: |
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case LP8788_INT_BATT_LOW: |
|
case LP8788_INT_NO_BATT: |
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power_supply_changed(pchg->charger); |
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power_supply_changed(pchg->battery); |
|
break; |
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default: |
|
break; |
|
} |
|
|
|
/* report charger dectection event if used */ |
|
if (!pdata) |
|
goto irq_handled; |
|
|
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if (pdata->charger_event && id == LP8788_INT_CHG_INPUT_STATE) |
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schedule_work(&pchg->charger_work); |
|
|
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irq_handled: |
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return IRQ_HANDLED; |
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} |
|
|
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static int lp8788_set_irqs(struct platform_device *pdev, |
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struct lp8788_charger *pchg, const char *name) |
|
{ |
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struct resource *r; |
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struct irq_domain *irqdm = pchg->lp->irqdm; |
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int irq_start; |
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int irq_end; |
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int virq; |
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int nr_irq; |
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int i; |
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int ret; |
|
|
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/* no error even if no irq resource */ |
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r = platform_get_resource_byname(pdev, IORESOURCE_IRQ, name); |
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if (!r) |
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return 0; |
|
|
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irq_start = r->start; |
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irq_end = r->end; |
|
|
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for (i = irq_start; i <= irq_end; i++) { |
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nr_irq = pchg->num_irqs; |
|
|
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virq = irq_create_mapping(irqdm, i); |
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pchg->irqs[nr_irq].virq = virq; |
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pchg->irqs[nr_irq].which = i; |
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pchg->num_irqs++; |
|
|
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ret = request_threaded_irq(virq, NULL, |
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lp8788_charger_irq_thread, |
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IRQF_ONESHOT, name, pchg); |
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if (ret) |
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break; |
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} |
|
|
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if (i <= irq_end) |
|
goto err_free_irq; |
|
|
|
return 0; |
|
|
|
err_free_irq: |
|
for (i = 0; i < pchg->num_irqs; i++) |
|
free_irq(pchg->irqs[i].virq, pchg); |
|
return ret; |
|
} |
|
|
|
static int lp8788_irq_register(struct platform_device *pdev, |
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struct lp8788_charger *pchg) |
|
{ |
|
const char *name[] = { |
|
LP8788_CHG_IRQ, LP8788_PRSW_IRQ, LP8788_BATT_IRQ |
|
}; |
|
int i; |
|
int ret; |
|
|
|
INIT_WORK(&pchg->charger_work, lp8788_charger_event); |
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pchg->num_irqs = 0; |
|
|
|
for (i = 0; i < ARRAY_SIZE(name); i++) { |
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ret = lp8788_set_irqs(pdev, pchg, name[i]); |
|
if (ret) { |
|
dev_warn(&pdev->dev, "irq setup failed: %s\n", name[i]); |
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return ret; |
|
} |
|
} |
|
|
|
if (pchg->num_irqs > LP8788_MAX_CHG_IRQS) { |
|
dev_err(&pdev->dev, "invalid total number of irqs: %d\n", |
|
pchg->num_irqs); |
|
return -EINVAL; |
|
} |
|
|
|
|
|
return 0; |
|
} |
|
|
|
static void lp8788_irq_unregister(struct platform_device *pdev, |
|
struct lp8788_charger *pchg) |
|
{ |
|
int i; |
|
int irq; |
|
|
|
for (i = 0; i < pchg->num_irqs; i++) { |
|
irq = pchg->irqs[i].virq; |
|
if (!irq) |
|
continue; |
|
|
|
free_irq(irq, pchg); |
|
} |
|
} |
|
|
|
static void lp8788_setup_adc_channel(struct device *dev, |
|
struct lp8788_charger *pchg) |
|
{ |
|
struct lp8788_charger_platform_data *pdata = pchg->pdata; |
|
struct iio_channel *chan; |
|
|
|
if (!pdata) |
|
return; |
|
|
|
/* ADC channel for battery voltage */ |
|
chan = devm_iio_channel_get(dev, pdata->adc_vbatt); |
|
pchg->chan[LP8788_VBATT] = IS_ERR(chan) ? NULL : chan; |
|
|
|
/* ADC channel for battery temperature */ |
|
chan = devm_iio_channel_get(dev, pdata->adc_batt_temp); |
|
pchg->chan[LP8788_BATT_TEMP] = IS_ERR(chan) ? NULL : chan; |
|
} |
|
|
|
static ssize_t lp8788_show_charger_status(struct device *dev, |
|
struct device_attribute *attr, char *buf) |
|
{ |
|
struct lp8788_charger *pchg = dev_get_drvdata(dev); |
|
enum lp8788_charging_state state; |
|
static const char * const desc[LP8788_MAX_CHG_STATE] = { |
|
[LP8788_OFF] = "CHARGER OFF", |
|
[LP8788_WARM_UP] = "WARM UP", |
|
[LP8788_LOW_INPUT] = "LOW INPUT STATE", |
|
[LP8788_PRECHARGE] = "CHARGING - PRECHARGE", |
|
[LP8788_CC] = "CHARGING - CC", |
|
[LP8788_CV] = "CHARGING - CV", |
|
[LP8788_MAINTENANCE] = "NO CHARGING - MAINTENANCE", |
|
[LP8788_BATTERY_FAULT] = "BATTERY FAULT", |
|
[LP8788_SYSTEM_SUPPORT] = "SYSTEM SUPPORT", |
|
[LP8788_HIGH_CURRENT] = "HIGH CURRENT", |
|
}; |
|
u8 data; |
|
|
|
lp8788_read_byte(pchg->lp, LP8788_CHG_STATUS, &data); |
|
state = (data & LP8788_CHG_STATE_M) >> LP8788_CHG_STATE_S; |
|
|
|
return scnprintf(buf, PAGE_SIZE, "%s\n", desc[state]); |
|
} |
|
|
|
static ssize_t lp8788_show_eoc_time(struct device *dev, |
|
struct device_attribute *attr, char *buf) |
|
{ |
|
struct lp8788_charger *pchg = dev_get_drvdata(dev); |
|
static const char * const stime[] = { |
|
"400ms", "5min", "10min", "15min", |
|
"20min", "25min", "30min", "No timeout" |
|
}; |
|
u8 val; |
|
|
|
lp8788_read_byte(pchg->lp, LP8788_CHG_EOC, &val); |
|
val = (val & LP8788_CHG_EOC_TIME_M) >> LP8788_CHG_EOC_TIME_S; |
|
|
|
return scnprintf(buf, PAGE_SIZE, "End Of Charge Time: %s\n", |
|
stime[val]); |
|
} |
|
|
|
static ssize_t lp8788_show_eoc_level(struct device *dev, |
|
struct device_attribute *attr, char *buf) |
|
{ |
|
struct lp8788_charger *pchg = dev_get_drvdata(dev); |
|
static const char * const abs_level[] = { |
|
"25mA", "49mA", "75mA", "98mA" |
|
}; |
|
static const char * const relative_level[] = { |
|
"5%", "10%", "15%", "20%" |
|
}; |
|
const char *level; |
|
u8 val; |
|
u8 mode; |
|
|
|
lp8788_read_byte(pchg->lp, LP8788_CHG_EOC, &val); |
|
|
|
mode = val & LP8788_CHG_EOC_MODE_M; |
|
val = (val & LP8788_CHG_EOC_LEVEL_M) >> LP8788_CHG_EOC_LEVEL_S; |
|
level = mode ? abs_level[val] : relative_level[val]; |
|
|
|
return scnprintf(buf, PAGE_SIZE, "End Of Charge Level: %s\n", level); |
|
} |
|
|
|
static DEVICE_ATTR(charger_status, S_IRUSR, lp8788_show_charger_status, NULL); |
|
static DEVICE_ATTR(eoc_time, S_IRUSR, lp8788_show_eoc_time, NULL); |
|
static DEVICE_ATTR(eoc_level, S_IRUSR, lp8788_show_eoc_level, NULL); |
|
|
|
static struct attribute *lp8788_charger_sysfs_attrs[] = { |
|
&dev_attr_charger_status.attr, |
|
&dev_attr_eoc_time.attr, |
|
&dev_attr_eoc_level.attr, |
|
NULL, |
|
}; |
|
|
|
ATTRIBUTE_GROUPS(lp8788_charger_sysfs); |
|
|
|
static int lp8788_psy_register(struct platform_device *pdev, |
|
struct lp8788_charger *pchg) |
|
{ |
|
struct power_supply_config charger_cfg = {}; |
|
|
|
charger_cfg.attr_grp = lp8788_charger_sysfs_groups; |
|
charger_cfg.supplied_to = battery_supplied_to; |
|
charger_cfg.num_supplicants = ARRAY_SIZE(battery_supplied_to); |
|
|
|
pchg->charger = power_supply_register(&pdev->dev, |
|
&lp8788_psy_charger_desc, |
|
&charger_cfg); |
|
if (IS_ERR(pchg->charger)) |
|
return -EPERM; |
|
|
|
pchg->battery = power_supply_register(&pdev->dev, |
|
&lp8788_psy_battery_desc, NULL); |
|
if (IS_ERR(pchg->battery)) { |
|
power_supply_unregister(pchg->charger); |
|
return -EPERM; |
|
} |
|
|
|
return 0; |
|
} |
|
|
|
static int lp8788_charger_probe(struct platform_device *pdev) |
|
{ |
|
struct lp8788 *lp = dev_get_drvdata(pdev->dev.parent); |
|
struct lp8788_charger *pchg; |
|
struct device *dev = &pdev->dev; |
|
int ret; |
|
|
|
pchg = devm_kzalloc(dev, sizeof(struct lp8788_charger), GFP_KERNEL); |
|
if (!pchg) |
|
return -ENOMEM; |
|
|
|
pchg->lp = lp; |
|
pchg->pdata = lp->pdata ? lp->pdata->chg_pdata : NULL; |
|
platform_set_drvdata(pdev, pchg); |
|
|
|
ret = lp8788_update_charger_params(pdev, pchg); |
|
if (ret) |
|
return ret; |
|
|
|
lp8788_setup_adc_channel(&pdev->dev, pchg); |
|
|
|
ret = lp8788_psy_register(pdev, pchg); |
|
if (ret) |
|
return ret; |
|
|
|
ret = lp8788_irq_register(pdev, pchg); |
|
if (ret) |
|
dev_warn(dev, "failed to register charger irq: %d\n", ret); |
|
|
|
return 0; |
|
} |
|
|
|
static int lp8788_charger_remove(struct platform_device *pdev) |
|
{ |
|
struct lp8788_charger *pchg = platform_get_drvdata(pdev); |
|
|
|
flush_work(&pchg->charger_work); |
|
lp8788_irq_unregister(pdev, pchg); |
|
lp8788_psy_unregister(pchg); |
|
|
|
return 0; |
|
} |
|
|
|
static struct platform_driver lp8788_charger_driver = { |
|
.probe = lp8788_charger_probe, |
|
.remove = lp8788_charger_remove, |
|
.driver = { |
|
.name = LP8788_DEV_CHARGER, |
|
}, |
|
}; |
|
module_platform_driver(lp8788_charger_driver); |
|
|
|
MODULE_DESCRIPTION("TI LP8788 Charger Driver"); |
|
MODULE_AUTHOR("Milo Kim"); |
|
MODULE_LICENSE("GPL"); |
|
MODULE_ALIAS("platform:lp8788-charger");
|
|
|