753 строки
18 KiB
C
753 строки
18 KiB
C
/*
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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 <milo.kim@ti.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 version 2 as
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* published by the Free Software Foundation.
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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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/* 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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/* 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_BUF_SIZE 40
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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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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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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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* 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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* 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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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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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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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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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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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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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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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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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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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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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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static int lp8788_update_charger_params(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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if (!pdata || !pdata->chg_params) {
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dev_info(lp->dev, "skip updating charger parameters\n");
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return 0;
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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 (!param)
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continue;
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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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static int lp8788_psy_register(struct platform_device *pdev,
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struct lp8788_charger *pchg)
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{
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pchg->charger.name = LP8788_CHARGER_NAME;
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pchg->charger.type = POWER_SUPPLY_TYPE_MAINS;
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pchg->charger.properties = lp8788_charger_prop;
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pchg->charger.num_properties = ARRAY_SIZE(lp8788_charger_prop);
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pchg->charger.get_property = lp8788_charger_get_property;
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pchg->charger.supplied_to = battery_supplied_to;
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pchg->charger.num_supplicants = ARRAY_SIZE(battery_supplied_to);
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if (power_supply_register(&pdev->dev, &pchg->charger))
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return -EPERM;
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pchg->battery.name = LP8788_BATTERY_NAME;
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pchg->battery.type = POWER_SUPPLY_TYPE_BATTERY;
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pchg->battery.properties = lp8788_battery_prop;
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pchg->battery.num_properties = ARRAY_SIZE(lp8788_battery_prop);
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pchg->battery.get_property = lp8788_battery_get_property;
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if (power_supply_register(&pdev->dev, &pchg->battery))
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return -EPERM;
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return 0;
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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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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;
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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:
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case LP8788_INT_NO_BATT:
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power_supply_changed(&pchg->charger);
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power_supply_changed(&pchg->battery);
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break;
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default:
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break;
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}
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/* report charger dectection event if used */
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if (!pdata)
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goto irq_handled;
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|
|
|
if (pdata->charger_event && id == LP8788_INT_CHG_INPUT_STATE)
|
|
schedule_work(&pchg->charger_work);
|
|
|
|
irq_handled:
|
|
return IRQ_HANDLED;
|
|
}
|
|
|
|
static int lp8788_set_irqs(struct platform_device *pdev,
|
|
struct lp8788_charger *pchg, const char *name)
|
|
{
|
|
struct resource *r;
|
|
struct irq_domain *irqdm = pchg->lp->irqdm;
|
|
int irq_start;
|
|
int irq_end;
|
|
int virq;
|
|
int nr_irq;
|
|
int i;
|
|
int ret;
|
|
|
|
/* no error even if no irq resource */
|
|
r = platform_get_resource_byname(pdev, IORESOURCE_IRQ, name);
|
|
if (!r)
|
|
return 0;
|
|
|
|
irq_start = r->start;
|
|
irq_end = r->end;
|
|
|
|
for (i = irq_start; i <= irq_end; i++) {
|
|
nr_irq = pchg->num_irqs;
|
|
|
|
virq = irq_create_mapping(irqdm, i);
|
|
pchg->irqs[nr_irq].virq = virq;
|
|
pchg->irqs[nr_irq].which = i;
|
|
pchg->num_irqs++;
|
|
|
|
ret = request_threaded_irq(virq, NULL,
|
|
lp8788_charger_irq_thread,
|
|
0, name, pchg);
|
|
if (ret)
|
|
break;
|
|
}
|
|
|
|
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,
|
|
struct lp8788_charger *pchg)
|
|
{
|
|
struct lp8788 *lp = pchg->lp;
|
|
const char *name[] = {
|
|
LP8788_CHG_IRQ, LP8788_PRSW_IRQ, LP8788_BATT_IRQ
|
|
};
|
|
int i;
|
|
int ret;
|
|
|
|
INIT_WORK(&pchg->charger_work, lp8788_charger_event);
|
|
pchg->num_irqs = 0;
|
|
|
|
for (i = 0; i < ARRAY_SIZE(name); i++) {
|
|
ret = lp8788_set_irqs(pdev, pchg, name[i]);
|
|
if (ret) {
|
|
dev_warn(lp->dev, "irq setup failed: %s\n", name[i]);
|
|
return ret;
|
|
}
|
|
}
|
|
|
|
if (pchg->num_irqs > LP8788_MAX_CHG_IRQS) {
|
|
dev_err(lp->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(const char *consumer_name,
|
|
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 = iio_channel_get(consumer_name, pdata->adc_vbatt);
|
|
pchg->chan[LP8788_VBATT] = IS_ERR(chan) ? NULL : chan;
|
|
|
|
/* ADC channel for battery temperature */
|
|
chan = iio_channel_get(consumer_name, pdata->adc_batt_temp);
|
|
pchg->chan[LP8788_BATT_TEMP] = IS_ERR(chan) ? NULL : chan;
|
|
}
|
|
|
|
static void lp8788_release_adc_channel(struct lp8788_charger *pchg)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < LP8788_NUM_CHG_ADC; i++) {
|
|
if (!pchg->chan[i])
|
|
continue;
|
|
|
|
iio_channel_release(pchg->chan[i]);
|
|
pchg->chan[i] = NULL;
|
|
}
|
|
}
|
|
|
|
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;
|
|
char *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, LP8788_BUF_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);
|
|
char *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, LP8788_BUF_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);
|
|
char *abs_level[] = { "25mA", "49mA", "75mA", "98mA" };
|
|
char *relative_level[] = { "5%", "10%", "15%", "20%" };
|
|
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, LP8788_BUF_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_attr[] = {
|
|
&dev_attr_charger_status.attr,
|
|
&dev_attr_eoc_time.attr,
|
|
&dev_attr_eoc_level.attr,
|
|
NULL,
|
|
};
|
|
|
|
static const struct attribute_group lp8788_attr_group = {
|
|
.attrs = lp8788_charger_attr,
|
|
};
|
|
|
|
static int lp8788_charger_probe(struct platform_device *pdev)
|
|
{
|
|
struct lp8788 *lp = dev_get_drvdata(pdev->dev.parent);
|
|
struct lp8788_charger *pchg;
|
|
int ret;
|
|
|
|
pchg = devm_kzalloc(lp->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(pchg);
|
|
if (ret)
|
|
return ret;
|
|
|
|
lp8788_setup_adc_channel(pdev->name, pchg);
|
|
|
|
ret = lp8788_psy_register(pdev, pchg);
|
|
if (ret)
|
|
return ret;
|
|
|
|
ret = sysfs_create_group(&pdev->dev.kobj, &lp8788_attr_group);
|
|
if (ret) {
|
|
lp8788_psy_unregister(pchg);
|
|
return ret;
|
|
}
|
|
|
|
ret = lp8788_irq_register(pdev, pchg);
|
|
if (ret)
|
|
dev_warn(lp->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);
|
|
sysfs_remove_group(&pdev->dev.kobj, &lp8788_attr_group);
|
|
lp8788_psy_unregister(pchg);
|
|
lp8788_release_adc_channel(pchg);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static struct platform_driver lp8788_charger_driver = {
|
|
.probe = lp8788_charger_probe,
|
|
.remove = lp8788_charger_remove,
|
|
.driver = {
|
|
.name = LP8788_DEV_CHARGER,
|
|
.owner = THIS_MODULE,
|
|
},
|
|
};
|
|
module_platform_driver(lp8788_charger_driver);
|
|
|
|
MODULE_DESCRIPTION("TI LP8788 Charger Driver");
|
|
MODULE_AUTHOR("Milo Kim");
|
|
MODULE_LICENSE("GPL");
|
|
MODULE_ALIAS("platform:lp8788-charger");
|