| /* |
| * TI LP8788 MFD - battery charger driver |
| * |
| * Copyright 2012 Texas Instruments |
| * |
| * Author: Milo(Woogyom) Kim <milo.kim@ti.com> |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License version 2 as |
| * published by the Free Software Foundation. |
| * |
| */ |
| |
| #include <linux/err.h> |
| #include <linux/iio/consumer.h> |
| #include <linux/interrupt.h> |
| #include <linux/irqdomain.h> |
| #include <linux/mfd/lp8788.h> |
| #include <linux/module.h> |
| #include <linux/platform_device.h> |
| #include <linux/power_supply.h> |
| #include <linux/slab.h> |
| #include <linux/workqueue.h> |
| |
| /* register address */ |
| #define LP8788_CHG_STATUS 0x07 |
| #define LP8788_CHG_IDCIN 0x13 |
| #define LP8788_CHG_IBATT 0x14 |
| #define LP8788_CHG_VTERM 0x15 |
| #define LP8788_CHG_EOC 0x16 |
| |
| /* mask/shift bits */ |
| #define LP8788_CHG_INPUT_STATE_M 0x03 /* Addr 07h */ |
| #define LP8788_CHG_STATE_M 0x3C |
| #define LP8788_CHG_STATE_S 2 |
| #define LP8788_NO_BATT_M BIT(6) |
| #define LP8788_BAD_BATT_M BIT(7) |
| #define LP8788_CHG_IBATT_M 0x1F /* Addr 14h */ |
| #define LP8788_CHG_VTERM_M 0x0F /* Addr 15h */ |
| #define LP8788_CHG_EOC_LEVEL_M 0x30 /* Addr 16h */ |
| #define LP8788_CHG_EOC_LEVEL_S 4 |
| #define LP8788_CHG_EOC_TIME_M 0x0E |
| #define LP8788_CHG_EOC_TIME_S 1 |
| #define LP8788_CHG_EOC_MODE_M BIT(0) |
| |
| #define LP8788_CHARGER_NAME "charger" |
| #define LP8788_BATTERY_NAME "main_batt" |
| |
| #define LP8788_CHG_START 0x11 |
| #define LP8788_CHG_END 0x1C |
| |
| #define LP8788_ISEL_MAX 23 |
| #define LP8788_ISEL_STEP 50 |
| #define LP8788_VTERM_MIN 4100 |
| #define LP8788_VTERM_STEP 25 |
| #define LP8788_MAX_BATT_CAPACITY 100 |
| #define LP8788_MAX_CHG_IRQS 11 |
| |
| enum lp8788_charging_state { |
| LP8788_OFF, |
| LP8788_WARM_UP, |
| LP8788_LOW_INPUT = 0x3, |
| LP8788_PRECHARGE, |
| LP8788_CC, |
| LP8788_CV, |
| LP8788_MAINTENANCE, |
| LP8788_BATTERY_FAULT, |
| LP8788_SYSTEM_SUPPORT = 0xC, |
| LP8788_HIGH_CURRENT = 0xF, |
| LP8788_MAX_CHG_STATE, |
| }; |
| |
| enum lp8788_charger_adc_sel { |
| LP8788_VBATT, |
| LP8788_BATT_TEMP, |
| LP8788_NUM_CHG_ADC, |
| }; |
| |
| enum lp8788_charger_input_state { |
| LP8788_SYSTEM_SUPPLY = 1, |
| LP8788_FULL_FUNCTION, |
| }; |
| |
| /* |
| * struct lp8788_chg_irq |
| * @which : lp8788 interrupt id |
| * @virq : Linux IRQ number from irq_domain |
| */ |
| struct lp8788_chg_irq { |
| enum lp8788_int_id which; |
| int virq; |
| }; |
| |
| /* |
| * struct lp8788_charger |
| * @lp : used for accessing the registers of mfd lp8788 device |
| * @charger : power supply driver for the battery charger |
| * @battery : power supply driver for the battery |
| * @charger_work : work queue for charger input interrupts |
| * @chan : iio channels for getting adc values |
| * eg) battery voltage, capacity and temperature |
| * @irqs : charger dedicated interrupts |
| * @num_irqs : total numbers of charger interrupts |
| * @pdata : charger platform specific data |
| */ |
| struct lp8788_charger { |
| struct lp8788 *lp; |
| struct power_supply charger; |
| struct power_supply battery; |
| struct work_struct charger_work; |
| struct iio_channel *chan[LP8788_NUM_CHG_ADC]; |
| struct lp8788_chg_irq irqs[LP8788_MAX_CHG_IRQS]; |
| int num_irqs; |
| struct lp8788_charger_platform_data *pdata; |
| }; |
| |
| static char *battery_supplied_to[] = { |
| LP8788_BATTERY_NAME, |
| }; |
| |
| static enum power_supply_property lp8788_charger_prop[] = { |
| POWER_SUPPLY_PROP_ONLINE, |
| POWER_SUPPLY_PROP_CURRENT_MAX, |
| }; |
| |
| static enum power_supply_property lp8788_battery_prop[] = { |
| POWER_SUPPLY_PROP_STATUS, |
| POWER_SUPPLY_PROP_HEALTH, |
| POWER_SUPPLY_PROP_PRESENT, |
| POWER_SUPPLY_PROP_VOLTAGE_NOW, |
| POWER_SUPPLY_PROP_CAPACITY, |
| POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT, |
| POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX, |
| POWER_SUPPLY_PROP_TEMP, |
| }; |
| |
| static bool lp8788_is_charger_detected(struct lp8788_charger *pchg) |
| { |
| u8 data; |
| |
| lp8788_read_byte(pchg->lp, LP8788_CHG_STATUS, &data); |
| data &= LP8788_CHG_INPUT_STATE_M; |
| |
| return data == LP8788_SYSTEM_SUPPLY || data == LP8788_FULL_FUNCTION; |
| } |
| |
| static int lp8788_charger_get_property(struct power_supply *psy, |
| enum power_supply_property psp, |
| union power_supply_propval *val) |
| { |
| struct lp8788_charger *pchg = dev_get_drvdata(psy->dev->parent); |
| u8 read; |
| |
| switch (psp) { |
| case POWER_SUPPLY_PROP_ONLINE: |
| val->intval = lp8788_is_charger_detected(pchg); |
| break; |
| case POWER_SUPPLY_PROP_CURRENT_MAX: |
| lp8788_read_byte(pchg->lp, LP8788_CHG_IDCIN, &read); |
| val->intval = LP8788_ISEL_STEP * |
| (min_t(int, read, LP8788_ISEL_MAX) + 1); |
| break; |
| default: |
| return -EINVAL; |
| } |
| |
| return 0; |
| } |
| |
| static int lp8788_get_battery_status(struct lp8788_charger *pchg, |
| union power_supply_propval *val) |
| { |
| enum lp8788_charging_state state; |
| u8 data; |
| int ret; |
| |
| ret = lp8788_read_byte(pchg->lp, LP8788_CHG_STATUS, &data); |
| if (ret) |
| return ret; |
| |
| state = (data & LP8788_CHG_STATE_M) >> LP8788_CHG_STATE_S; |
| switch (state) { |
| case LP8788_OFF: |
| val->intval = POWER_SUPPLY_STATUS_DISCHARGING; |
| break; |
| case LP8788_PRECHARGE: |
| case LP8788_CC: |
| case LP8788_CV: |
| case LP8788_HIGH_CURRENT: |
| val->intval = POWER_SUPPLY_STATUS_CHARGING; |
| break; |
| case LP8788_MAINTENANCE: |
| val->intval = POWER_SUPPLY_STATUS_FULL; |
| break; |
| default: |
| val->intval = POWER_SUPPLY_STATUS_NOT_CHARGING; |
| break; |
| } |
| |
| return 0; |
| } |
| |
| static int lp8788_get_battery_health(struct lp8788_charger *pchg, |
| union power_supply_propval *val) |
| { |
| u8 data; |
| int ret; |
| |
| ret = lp8788_read_byte(pchg->lp, LP8788_CHG_STATUS, &data); |
| if (ret) |
| return ret; |
| |
| if (data & LP8788_NO_BATT_M) |
| val->intval = POWER_SUPPLY_HEALTH_UNSPEC_FAILURE; |
| else if (data & LP8788_BAD_BATT_M) |
| val->intval = POWER_SUPPLY_HEALTH_DEAD; |
| else |
| val->intval = POWER_SUPPLY_HEALTH_GOOD; |
| |
| return 0; |
| } |
| |
| static int lp8788_get_battery_present(struct lp8788_charger *pchg, |
| union power_supply_propval *val) |
| { |
| u8 data; |
| int ret; |
| |
| ret = lp8788_read_byte(pchg->lp, LP8788_CHG_STATUS, &data); |
| if (ret) |
| return ret; |
| |
| val->intval = !(data & LP8788_NO_BATT_M); |
| return 0; |
| } |
| |
| static int lp8788_get_vbatt_adc(struct lp8788_charger *pchg, int *result) |
| { |
| struct iio_channel *channel = pchg->chan[LP8788_VBATT]; |
| |
| if (!channel) |
| return -EINVAL; |
| |
| return iio_read_channel_processed(channel, result); |
| } |
| |
| static int lp8788_get_battery_voltage(struct lp8788_charger *pchg, |
| union power_supply_propval *val) |
| { |
| return lp8788_get_vbatt_adc(pchg, &val->intval); |
| } |
| |
| static int lp8788_get_battery_capacity(struct lp8788_charger *pchg, |
| union power_supply_propval *val) |
| { |
| struct lp8788 *lp = pchg->lp; |
| struct lp8788_charger_platform_data *pdata = pchg->pdata; |
| unsigned int max_vbatt; |
| int vbatt; |
| enum lp8788_charging_state state; |
| u8 data; |
| int ret; |
| |
| if (!pdata) |
| return -EINVAL; |
| |
| max_vbatt = pdata->max_vbatt_mv; |
| if (max_vbatt == 0) |
| return -EINVAL; |
| |
| ret = lp8788_read_byte(lp, LP8788_CHG_STATUS, &data); |
| if (ret) |
| return ret; |
| |
| state = (data & LP8788_CHG_STATE_M) >> LP8788_CHG_STATE_S; |
| |
| if (state == LP8788_MAINTENANCE) { |
| val->intval = LP8788_MAX_BATT_CAPACITY; |
| } else { |
| ret = lp8788_get_vbatt_adc(pchg, &vbatt); |
| if (ret) |
| return ret; |
| |
| val->intval = (vbatt * LP8788_MAX_BATT_CAPACITY) / max_vbatt; |
| val->intval = min(val->intval, LP8788_MAX_BATT_CAPACITY); |
| } |
| |
| return 0; |
| } |
| |
| static int lp8788_get_battery_temperature(struct lp8788_charger *pchg, |
| union power_supply_propval *val) |
| { |
| struct iio_channel *channel = pchg->chan[LP8788_BATT_TEMP]; |
| int result; |
| int ret; |
| |
| if (!channel) |
| return -EINVAL; |
| |
| ret = iio_read_channel_processed(channel, &result); |
| if (ret < 0) |
| return -EINVAL; |
| |
| /* unit: 0.1 'C */ |
| val->intval = result * 10; |
| |
| return 0; |
| } |
| |
| static int lp8788_get_battery_charging_current(struct lp8788_charger *pchg, |
| union power_supply_propval *val) |
| { |
| u8 read; |
| |
| lp8788_read_byte(pchg->lp, LP8788_CHG_IBATT, &read); |
| read &= LP8788_CHG_IBATT_M; |
| val->intval = LP8788_ISEL_STEP * |
| (min_t(int, read, LP8788_ISEL_MAX) + 1); |
| |
| return 0; |
| } |
| |
| static int lp8788_get_charging_termination_voltage(struct lp8788_charger *pchg, |
| union power_supply_propval *val) |
| { |
| u8 read; |
| |
| lp8788_read_byte(pchg->lp, LP8788_CHG_VTERM, &read); |
| read &= LP8788_CHG_VTERM_M; |
| val->intval = LP8788_VTERM_MIN + LP8788_VTERM_STEP * read; |
| |
| return 0; |
| } |
| |
| static int lp8788_battery_get_property(struct power_supply *psy, |
| enum power_supply_property psp, |
| union power_supply_propval *val) |
| { |
| struct lp8788_charger *pchg = dev_get_drvdata(psy->dev->parent); |
| |
| switch (psp) { |
| case POWER_SUPPLY_PROP_STATUS: |
| return lp8788_get_battery_status(pchg, val); |
| case POWER_SUPPLY_PROP_HEALTH: |
| return lp8788_get_battery_health(pchg, val); |
| case POWER_SUPPLY_PROP_PRESENT: |
| return lp8788_get_battery_present(pchg, val); |
| case POWER_SUPPLY_PROP_VOLTAGE_NOW: |
| return lp8788_get_battery_voltage(pchg, val); |
| case POWER_SUPPLY_PROP_CAPACITY: |
| return lp8788_get_battery_capacity(pchg, val); |
| case POWER_SUPPLY_PROP_TEMP: |
| return lp8788_get_battery_temperature(pchg, val); |
| case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT: |
| return lp8788_get_battery_charging_current(pchg, val); |
| case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX: |
| return lp8788_get_charging_termination_voltage(pchg, val); |
| default: |
| return -EINVAL; |
| } |
| } |
| |
| static inline bool lp8788_is_valid_charger_register(u8 addr) |
| { |
| return addr >= LP8788_CHG_START && addr <= LP8788_CHG_END; |
| } |
| |
| static int lp8788_update_charger_params(struct platform_device *pdev, |
| struct lp8788_charger *pchg) |
| { |
| struct lp8788 *lp = pchg->lp; |
| struct lp8788_charger_platform_data *pdata = pchg->pdata; |
| struct lp8788_chg_param *param; |
| int i; |
| int ret; |
| |
| if (!pdata || !pdata->chg_params) { |
| dev_info(&pdev->dev, "skip updating charger parameters\n"); |
| return 0; |
| } |
| |
| /* settting charging parameters */ |
| for (i = 0; i < pdata->num_chg_params; i++) { |
| param = pdata->chg_params + i; |
| |
| if (!param) |
| continue; |
| |
| if (lp8788_is_valid_charger_register(param->addr)) { |
| ret = lp8788_write_byte(lp, param->addr, param->val); |
| if (ret) |
| return ret; |
| } |
| } |
| |
| return 0; |
| } |
| |
| static int lp8788_psy_register(struct platform_device *pdev, |
| struct lp8788_charger *pchg) |
| { |
| struct power_supply_config charger_cfg = {}; |
| |
| pchg->charger.name = LP8788_CHARGER_NAME; |
| pchg->charger.type = POWER_SUPPLY_TYPE_MAINS; |
| pchg->charger.properties = lp8788_charger_prop; |
| pchg->charger.num_properties = ARRAY_SIZE(lp8788_charger_prop); |
| pchg->charger.get_property = lp8788_charger_get_property; |
| |
| charger_cfg.supplied_to = battery_supplied_to; |
| charger_cfg.num_supplicants = ARRAY_SIZE(battery_supplied_to); |
| |
| if (power_supply_register(&pdev->dev, &pchg->charger, &charger_cfg)) |
| return -EPERM; |
| |
| pchg->battery.name = LP8788_BATTERY_NAME; |
| pchg->battery.type = POWER_SUPPLY_TYPE_BATTERY; |
| pchg->battery.properties = lp8788_battery_prop; |
| pchg->battery.num_properties = ARRAY_SIZE(lp8788_battery_prop); |
| pchg->battery.get_property = lp8788_battery_get_property; |
| |
| if (power_supply_register(&pdev->dev, &pchg->battery, NULL)) { |
| power_supply_unregister(&pchg->charger); |
| return -EPERM; |
| } |
| |
| return 0; |
| } |
| |
| static void lp8788_psy_unregister(struct lp8788_charger *pchg) |
| { |
| power_supply_unregister(&pchg->battery); |
| power_supply_unregister(&pchg->charger); |
| } |
| |
| static void lp8788_charger_event(struct work_struct *work) |
| { |
| struct lp8788_charger *pchg = |
| container_of(work, struct lp8788_charger, charger_work); |
| struct lp8788_charger_platform_data *pdata = pchg->pdata; |
| enum lp8788_charger_event event = lp8788_is_charger_detected(pchg); |
| |
| pdata->charger_event(pchg->lp, event); |
| } |
| |
| static bool lp8788_find_irq_id(struct lp8788_charger *pchg, int virq, int *id) |
| { |
| bool found; |
| int i; |
| |
| for (i = 0; i < pchg->num_irqs; i++) { |
| if (pchg->irqs[i].virq == virq) { |
| *id = pchg->irqs[i].which; |
| found = true; |
| break; |
| } |
| } |
| |
| return found; |
| } |
| |
| static irqreturn_t lp8788_charger_irq_thread(int virq, void *ptr) |
| { |
| struct lp8788_charger *pchg = ptr; |
| struct lp8788_charger_platform_data *pdata = pchg->pdata; |
| int id = -1; |
| |
| if (!lp8788_find_irq_id(pchg, virq, &id)) |
| return IRQ_NONE; |
| |
| switch (id) { |
| case LP8788_INT_CHG_INPUT_STATE: |
| case LP8788_INT_CHG_STATE: |
| case LP8788_INT_EOC: |
| case LP8788_INT_BATT_LOW: |
| case LP8788_INT_NO_BATT: |
| power_supply_changed(&pchg->charger); |
| power_supply_changed(&pchg->battery); |
| break; |
| default: |
| break; |
| } |
| |
| /* report charger dectection event if used */ |
| if (!pdata) |
| goto irq_handled; |
| |
| 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) |
| { |
| 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(&pdev->dev, "irq setup failed: %s\n", name[i]); |
| 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 = iio_channel_get(dev, pdata->adc_vbatt); |
| pchg->chan[LP8788_VBATT] = IS_ERR(chan) ? NULL : chan; |
| |
| /* ADC channel for battery temperature */ |
| chan = iio_channel_get(dev, 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, 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); |
| 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, 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); |
| 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, 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_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; |
| 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 = 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(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, |
| }, |
| }; |
| module_platform_driver(lp8788_charger_driver); |
| |
| MODULE_DESCRIPTION("TI LP8788 Charger Driver"); |
| MODULE_AUTHOR("Milo Kim"); |
| MODULE_LICENSE("GPL"); |
| MODULE_ALIAS("platform:lp8788-charger"); |