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drivers/power/sbs-battery.c
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/* |
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* Gas Gauge driver for SBS Compliant Batteries |
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* * Copyright (c) 2010, NVIDIA Corporation. * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, but WITHOUT * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for * more details. * * You should have received a copy of the GNU General Public License along * with this program; if not, write to the Free Software Foundation, Inc., * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */ #include <linux/init.h> #include <linux/module.h> #include <linux/kernel.h> #include <linux/err.h> #include <linux/power_supply.h> #include <linux/i2c.h> #include <linux/slab.h> |
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#include <linux/interrupt.h> #include <linux/gpio.h> |
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#include <linux/power/sbs-battery.h> |
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enum { REG_MANUFACTURER_DATA, REG_TEMPERATURE, REG_VOLTAGE, REG_CURRENT, REG_CAPACITY, REG_TIME_TO_EMPTY, REG_TIME_TO_FULL, REG_STATUS, REG_CYCLE_COUNT, |
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REG_SERIAL_NUMBER, REG_REMAINING_CAPACITY, |
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REG_REMAINING_CAPACITY_CHARGE, |
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REG_FULL_CHARGE_CAPACITY, |
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REG_FULL_CHARGE_CAPACITY_CHARGE, |
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REG_DESIGN_CAPACITY, |
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REG_DESIGN_CAPACITY_CHARGE, |
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REG_DESIGN_VOLTAGE, |
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}; |
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/* Battery Mode defines */ #define BATTERY_MODE_OFFSET 0x03 #define BATTERY_MODE_MASK 0x8000 |
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enum sbs_battery_mode { |
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BATTERY_MODE_AMPS, BATTERY_MODE_WATTS }; |
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/* manufacturer access defines */ #define MANUFACTURER_ACCESS_STATUS 0x0006 #define MANUFACTURER_ACCESS_SLEEP 0x0011 /* battery status value bits */ |
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#define BATTERY_DISCHARGING 0x40 |
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#define BATTERY_FULL_CHARGED 0x20 #define BATTERY_FULL_DISCHARGED 0x10 |
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#define SBS_DATA(_psp, _addr, _min_value, _max_value) { \ |
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.psp = _psp, \ .addr = _addr, \ .min_value = _min_value, \ .max_value = _max_value, \ } |
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static const struct chip_data { |
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enum power_supply_property psp; u8 addr; int min_value; int max_value; |
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} sbs_data[] = { |
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[REG_MANUFACTURER_DATA] = |
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SBS_DATA(POWER_SUPPLY_PROP_PRESENT, 0x00, 0, 65535), |
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[REG_TEMPERATURE] = |
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SBS_DATA(POWER_SUPPLY_PROP_TEMP, 0x08, 0, 65535), |
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[REG_VOLTAGE] = |
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SBS_DATA(POWER_SUPPLY_PROP_VOLTAGE_NOW, 0x09, 0, 20000), |
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[REG_CURRENT] = |
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SBS_DATA(POWER_SUPPLY_PROP_CURRENT_NOW, 0x0A, -32768, 32767), |
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[REG_CAPACITY] = |
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SBS_DATA(POWER_SUPPLY_PROP_CAPACITY, 0x0E, 0, 100), |
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[REG_REMAINING_CAPACITY] = |
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SBS_DATA(POWER_SUPPLY_PROP_ENERGY_NOW, 0x0F, 0, 65535), |
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[REG_REMAINING_CAPACITY_CHARGE] = |
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SBS_DATA(POWER_SUPPLY_PROP_CHARGE_NOW, 0x0F, 0, 65535), |
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[REG_FULL_CHARGE_CAPACITY] = |
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SBS_DATA(POWER_SUPPLY_PROP_ENERGY_FULL, 0x10, 0, 65535), |
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[REG_FULL_CHARGE_CAPACITY_CHARGE] = |
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SBS_DATA(POWER_SUPPLY_PROP_CHARGE_FULL, 0x10, 0, 65535), |
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[REG_TIME_TO_EMPTY] = |
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SBS_DATA(POWER_SUPPLY_PROP_TIME_TO_EMPTY_AVG, 0x12, 0, 65535), |
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[REG_TIME_TO_FULL] = |
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SBS_DATA(POWER_SUPPLY_PROP_TIME_TO_FULL_AVG, 0x13, 0, 65535), |
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[REG_STATUS] = |
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SBS_DATA(POWER_SUPPLY_PROP_STATUS, 0x16, 0, 65535), |
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[REG_CYCLE_COUNT] = |
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SBS_DATA(POWER_SUPPLY_PROP_CYCLE_COUNT, 0x17, 0, 65535), |
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[REG_DESIGN_CAPACITY] = |
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SBS_DATA(POWER_SUPPLY_PROP_ENERGY_FULL_DESIGN, 0x18, 0, 65535), |
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[REG_DESIGN_CAPACITY_CHARGE] = |
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SBS_DATA(POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN, 0x18, 0, 65535), |
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[REG_DESIGN_VOLTAGE] = |
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SBS_DATA(POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN, 0x19, 0, 65535), |
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[REG_SERIAL_NUMBER] = |
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SBS_DATA(POWER_SUPPLY_PROP_SERIAL_NUMBER, 0x1C, 0, 65535), |
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}; |
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static enum power_supply_property sbs_properties[] = { |
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POWER_SUPPLY_PROP_STATUS, POWER_SUPPLY_PROP_HEALTH, POWER_SUPPLY_PROP_PRESENT, POWER_SUPPLY_PROP_TECHNOLOGY, POWER_SUPPLY_PROP_CYCLE_COUNT, POWER_SUPPLY_PROP_VOLTAGE_NOW, POWER_SUPPLY_PROP_CURRENT_NOW, POWER_SUPPLY_PROP_CAPACITY, POWER_SUPPLY_PROP_TEMP, POWER_SUPPLY_PROP_TIME_TO_EMPTY_AVG, POWER_SUPPLY_PROP_TIME_TO_FULL_AVG, POWER_SUPPLY_PROP_SERIAL_NUMBER, |
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POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN, POWER_SUPPLY_PROP_ENERGY_NOW, POWER_SUPPLY_PROP_ENERGY_FULL, POWER_SUPPLY_PROP_ENERGY_FULL_DESIGN, |
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POWER_SUPPLY_PROP_CHARGE_NOW, POWER_SUPPLY_PROP_CHARGE_FULL, POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN, |
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}; |
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struct sbs_info { |
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struct i2c_client *client; struct power_supply power_supply; |
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struct sbs_platform_data *pdata; |
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bool is_present; bool gpio_detect; bool enable_detection; int irq; |
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int last_state; int poll_time; struct delayed_work work; int ignore_changes; |
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}; |
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static int sbs_read_word_data(struct i2c_client *client, u8 address) |
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{ |
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struct sbs_info *chip = i2c_get_clientdata(client); |
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s32 ret = 0; int retries = 1; |
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if (chip->pdata) retries = max(chip->pdata->i2c_retry_count + 1, 1); |
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while (retries > 0) { ret = i2c_smbus_read_word_data(client, address); if (ret >= 0) break; retries--; } |
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|
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if (ret < 0) { |
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dev_dbg(&client->dev, |
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"%s: i2c read at address 0x%x failed ", __func__, address); return ret; } |
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return le16_to_cpu(ret); } |
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static int sbs_write_word_data(struct i2c_client *client, u8 address, |
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u16 value) { |
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struct sbs_info *chip = i2c_get_clientdata(client); |
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s32 ret = 0; int retries = 1; |
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if (chip->pdata) retries = max(chip->pdata->i2c_retry_count + 1, 1); |
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while (retries > 0) { ret = i2c_smbus_write_word_data(client, address, le16_to_cpu(value)); if (ret >= 0) break; retries--; } |
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|
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if (ret < 0) { |
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dev_dbg(&client->dev, |
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"%s: i2c write to address 0x%x failed ", __func__, address); return ret; } |
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return 0; } |
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static int sbs_get_battery_presence_and_health( |
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struct i2c_client *client, enum power_supply_property psp, union power_supply_propval *val) { s32 ret; |
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struct sbs_info *chip = i2c_get_clientdata(client); |
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if (psp == POWER_SUPPLY_PROP_PRESENT && |
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chip->gpio_detect) { ret = gpio_get_value(chip->pdata->battery_detect); if (ret == chip->pdata->battery_detect_present) |
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val->intval = 1; else val->intval = 0; |
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chip->is_present = val->intval; |
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return ret; } |
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/* Write to ManufacturerAccess with * ManufacturerAccess command and then * read the status */ |
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ret = sbs_write_word_data(client, sbs_data[REG_MANUFACTURER_DATA].addr, MANUFACTURER_ACCESS_STATUS); |
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if (ret < 0) { if (psp == POWER_SUPPLY_PROP_PRESENT) val->intval = 0; /* battery removed */ |
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return ret; |
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} |
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ret = sbs_read_word_data(client, sbs_data[REG_MANUFACTURER_DATA].addr); |
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if (ret < 0) return ret; |
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if (ret < sbs_data[REG_MANUFACTURER_DATA].min_value || ret > sbs_data[REG_MANUFACTURER_DATA].max_value) { |
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val->intval = 0; return 0; } /* Mask the upper nibble of 2nd byte and * lower byte of response then * shift the result by 8 to get status*/ ret &= 0x0F00; ret >>= 8; if (psp == POWER_SUPPLY_PROP_PRESENT) { if (ret == 0x0F) /* battery removed */ val->intval = 0; else val->intval = 1; } else if (psp == POWER_SUPPLY_PROP_HEALTH) { if (ret == 0x09) val->intval = POWER_SUPPLY_HEALTH_UNSPEC_FAILURE; else if (ret == 0x0B) val->intval = POWER_SUPPLY_HEALTH_OVERHEAT; else if (ret == 0x0C) val->intval = POWER_SUPPLY_HEALTH_DEAD; else val->intval = POWER_SUPPLY_HEALTH_GOOD; } return 0; } |
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static int sbs_get_battery_property(struct i2c_client *client, |
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int reg_offset, enum power_supply_property psp, union power_supply_propval *val) { |
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struct sbs_info *chip = i2c_get_clientdata(client); |
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s32 ret; |
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ret = sbs_read_word_data(client, sbs_data[reg_offset].addr); |
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if (ret < 0) return ret; /* returned values are 16 bit */ |
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if (sbs_data[reg_offset].min_value < 0) |
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ret = (s16)ret; |
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|
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if (ret >= sbs_data[reg_offset].min_value && ret <= sbs_data[reg_offset].max_value) { |
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val->intval = ret; |
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if (psp != POWER_SUPPLY_PROP_STATUS) return 0; if (ret & BATTERY_FULL_CHARGED) val->intval = POWER_SUPPLY_STATUS_FULL; else if (ret & BATTERY_FULL_DISCHARGED) val->intval = POWER_SUPPLY_STATUS_NOT_CHARGING; else if (ret & BATTERY_DISCHARGING) val->intval = POWER_SUPPLY_STATUS_DISCHARGING; else val->intval = POWER_SUPPLY_STATUS_CHARGING; |
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if (chip->poll_time == 0) chip->last_state = val->intval; else if (chip->last_state != val->intval) { cancel_delayed_work_sync(&chip->work); power_supply_changed(&chip->power_supply); chip->poll_time = 0; |
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} |
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} else { if (psp == POWER_SUPPLY_PROP_STATUS) val->intval = POWER_SUPPLY_STATUS_UNKNOWN; else val->intval = 0; } return 0; } |
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static void sbs_unit_adjustment(struct i2c_client *client, |
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enum power_supply_property psp, union power_supply_propval *val) { #define BASE_UNIT_CONVERSION 1000 #define BATTERY_MODE_CAP_MULT_WATT (10 * BASE_UNIT_CONVERSION) |
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#define TIME_UNIT_CONVERSION 60 #define TEMP_KELVIN_TO_CELSIUS 2731 |
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switch (psp) { case POWER_SUPPLY_PROP_ENERGY_NOW: case POWER_SUPPLY_PROP_ENERGY_FULL: case POWER_SUPPLY_PROP_ENERGY_FULL_DESIGN: |
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/* sbs provides energy in units of 10mWh. |
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* Convert to µWh */ |
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val->intval *= BATTERY_MODE_CAP_MULT_WATT; break; case POWER_SUPPLY_PROP_VOLTAGE_NOW: case POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN: case POWER_SUPPLY_PROP_CURRENT_NOW: |
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case POWER_SUPPLY_PROP_CHARGE_NOW: case POWER_SUPPLY_PROP_CHARGE_FULL: case POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN: |
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val->intval *= BASE_UNIT_CONVERSION; break; case POWER_SUPPLY_PROP_TEMP: |
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/* sbs provides battery temperature in 0.1K |
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* so convert it to 0.1°C */ val->intval -= TEMP_KELVIN_TO_CELSIUS; |
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break; case POWER_SUPPLY_PROP_TIME_TO_EMPTY_AVG: case POWER_SUPPLY_PROP_TIME_TO_FULL_AVG: |
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/* sbs provides time to empty and time to full in minutes. |
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* Convert to seconds */ |
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val->intval *= TIME_UNIT_CONVERSION; break; default: dev_dbg(&client->dev, "%s: no need for unit conversion %d ", __func__, psp); } } |
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static enum sbs_battery_mode sbs_set_battery_mode(struct i2c_client *client, enum sbs_battery_mode mode) |
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{ int ret, original_val; |
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original_val = sbs_read_word_data(client, BATTERY_MODE_OFFSET); |
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if (original_val < 0) return original_val; if ((original_val & BATTERY_MODE_MASK) == mode) return mode; if (mode == BATTERY_MODE_AMPS) ret = original_val & ~BATTERY_MODE_MASK; else ret = original_val | BATTERY_MODE_MASK; |
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ret = sbs_write_word_data(client, BATTERY_MODE_OFFSET, ret); |
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if (ret < 0) return ret; return original_val & BATTERY_MODE_MASK; } |
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static int sbs_get_battery_capacity(struct i2c_client *client, |
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int reg_offset, enum power_supply_property psp, |
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union power_supply_propval *val) { s32 ret; |
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enum sbs_battery_mode mode = BATTERY_MODE_WATTS; |
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if (power_supply_is_amp_property(psp)) mode = BATTERY_MODE_AMPS; |
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mode = sbs_set_battery_mode(client, mode); |
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if (mode < 0) return mode; |
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|
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ret = sbs_read_word_data(client, sbs_data[reg_offset].addr); |
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if (ret < 0) return ret; |
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|
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if (psp == POWER_SUPPLY_PROP_CAPACITY) { |
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/* sbs spec says that this can be >100 % |
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* even if max value is 100 % */ val->intval = min(ret, 100); } else val->intval = ret; |
3ddca062f sbs-battery: Rena... |
396 |
ret = sbs_set_battery_mode(client, mode); |
51d075660 bq20z75: Add supp... |
397 398 |
if (ret < 0) return ret; |
d3ab61ecb bq20z75: Add supp... |
399 400 |
return 0; } |
3ddca062f sbs-battery: Rena... |
401 402 |
static char sbs_serial[5]; static int sbs_get_battery_serial_number(struct i2c_client *client, |
d3ab61ecb bq20z75: Add supp... |
403 404 405 |
union power_supply_propval *val) { int ret; |
3ddca062f sbs-battery: Rena... |
406 |
ret = sbs_read_word_data(client, sbs_data[REG_SERIAL_NUMBER].addr); |
d3ab61ecb bq20z75: Add supp... |
407 408 |
if (ret < 0) return ret; |
3ddca062f sbs-battery: Rena... |
409 410 |
ret = sprintf(sbs_serial, "%04x", ret); val->strval = sbs_serial; |
a7640bfa1 power_supply: Add... |
411 412 413 |
return 0; } |
3ddca062f sbs-battery: Rena... |
414 |
static int sbs_get_property_index(struct i2c_client *client, |
51d075660 bq20z75: Add supp... |
415 416 417 |
enum power_supply_property psp) { int count; |
3ddca062f sbs-battery: Rena... |
418 419 |
for (count = 0; count < ARRAY_SIZE(sbs_data); count++) if (psp == sbs_data[count].psp) |
51d075660 bq20z75: Add supp... |
420 421 422 423 424 425 426 427 |
return count; dev_warn(&client->dev, "%s: Invalid Property - %d ", __func__, psp); return -EINVAL; } |
3ddca062f sbs-battery: Rena... |
428 |
static int sbs_get_property(struct power_supply *psy, |
a7640bfa1 power_supply: Add... |
429 430 431 |
enum power_supply_property psp, union power_supply_propval *val) { |
bb8791016 bq20z75: Add opti... |
432 |
int ret = 0; |
3ddca062f sbs-battery: Rena... |
433 434 435 |
struct sbs_info *chip = container_of(psy, struct sbs_info, power_supply); struct i2c_client *client = chip->client; |
a7640bfa1 power_supply: Add... |
436 437 438 439 |
switch (psp) { case POWER_SUPPLY_PROP_PRESENT: case POWER_SUPPLY_PROP_HEALTH: |
3ddca062f sbs-battery: Rena... |
440 |
ret = sbs_get_battery_presence_and_health(client, psp, val); |
a7d9ace4e bq20z75: Fix issu... |
441 442 |
if (psp == POWER_SUPPLY_PROP_PRESENT) return 0; |
a7640bfa1 power_supply: Add... |
443 444 445 446 447 |
break; case POWER_SUPPLY_PROP_TECHNOLOGY: val->intval = POWER_SUPPLY_TECHNOLOGY_LION; break; |
d3ab61ecb bq20z75: Add supp... |
448 449 450 |
case POWER_SUPPLY_PROP_ENERGY_NOW: case POWER_SUPPLY_PROP_ENERGY_FULL: case POWER_SUPPLY_PROP_ENERGY_FULL_DESIGN: |
51d075660 bq20z75: Add supp... |
451 452 453 |
case POWER_SUPPLY_PROP_CHARGE_NOW: case POWER_SUPPLY_PROP_CHARGE_FULL: case POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN: |
a7640bfa1 power_supply: Add... |
454 |
case POWER_SUPPLY_PROP_CAPACITY: |
3ddca062f sbs-battery: Rena... |
455 |
ret = sbs_get_property_index(client, psp); |
bb8791016 bq20z75: Add opti... |
456 457 |
if (ret < 0) break; |
d3ab61ecb bq20z75: Add supp... |
458 |
|
3ddca062f sbs-battery: Rena... |
459 |
ret = sbs_get_battery_capacity(client, ret, psp, val); |
d3ab61ecb bq20z75: Add supp... |
460 461 462 |
break; case POWER_SUPPLY_PROP_SERIAL_NUMBER: |
3ddca062f sbs-battery: Rena... |
463 |
ret = sbs_get_battery_serial_number(client, val); |
a7640bfa1 power_supply: Add... |
464 465 466 467 468 469 470 471 472 |
break; case POWER_SUPPLY_PROP_STATUS: case POWER_SUPPLY_PROP_CYCLE_COUNT: case POWER_SUPPLY_PROP_VOLTAGE_NOW: case POWER_SUPPLY_PROP_CURRENT_NOW: case POWER_SUPPLY_PROP_TEMP: case POWER_SUPPLY_PROP_TIME_TO_EMPTY_AVG: case POWER_SUPPLY_PROP_TIME_TO_FULL_AVG: |
d3ab61ecb bq20z75: Add supp... |
473 |
case POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN: |
3ddca062f sbs-battery: Rena... |
474 |
ret = sbs_get_property_index(client, psp); |
bb8791016 bq20z75: Add opti... |
475 476 |
if (ret < 0) break; |
d3ab61ecb bq20z75: Add supp... |
477 |
|
3ddca062f sbs-battery: Rena... |
478 |
ret = sbs_get_battery_property(client, ret, psp, val); |
a7640bfa1 power_supply: Add... |
479 480 481 482 483 484 485 486 |
break; default: dev_err(&client->dev, "%s: INVALID property ", __func__); return -EINVAL; } |
3ddca062f sbs-battery: Rena... |
487 |
if (!chip->enable_detection) |
bb8791016 bq20z75: Add opti... |
488 |
goto done; |
3ddca062f sbs-battery: Rena... |
489 490 491 492 |
if (!chip->gpio_detect && chip->is_present != (ret >= 0)) { chip->is_present = (ret >= 0); power_supply_changed(&chip->power_supply); |
bb8791016 bq20z75: Add opti... |
493 494 495 496 497 |
} done: if (!ret) { /* Convert units to match requirements for power supply class */ |
3ddca062f sbs-battery: Rena... |
498 |
sbs_unit_adjustment(client, psp, val); |
bb8791016 bq20z75: Add opti... |
499 |
} |
d3ab61ecb bq20z75: Add supp... |
500 |
|
a7640bfa1 power_supply: Add... |
501 |
dev_dbg(&client->dev, |
a7d9ace4e bq20z75: Fix issu... |
502 503 |
"%s: property = %d, value = %x ", __func__, psp, val->intval); |
3ddca062f sbs-battery: Rena... |
504 |
if (ret && chip->is_present) |
a7d9ace4e bq20z75: Fix issu... |
505 506 507 508 509 |
return ret; /* battery not present, so return NODATA for properties */ if (ret) return -ENODATA; |
a7640bfa1 power_supply: Add... |
510 |
|
a7d9ace4e bq20z75: Fix issu... |
511 |
return 0; |
a7640bfa1 power_supply: Add... |
512 |
} |
3ddca062f sbs-battery: Rena... |
513 |
static irqreturn_t sbs_irq(int irq, void *devid) |
bb8791016 bq20z75: Add opti... |
514 515 516 517 518 519 520 |
{ struct power_supply *battery = devid; power_supply_changed(battery); return IRQ_HANDLED; } |
3ddca062f sbs-battery: Rena... |
521 |
static void sbs_external_power_changed(struct power_supply *psy) |
58ddafae2 bq20z75: Add supp... |
522 |
{ |
3ddca062f sbs-battery: Rena... |
523 |
struct sbs_info *chip; |
58ddafae2 bq20z75: Add supp... |
524 |
|
3ddca062f sbs-battery: Rena... |
525 |
chip = container_of(psy, struct sbs_info, power_supply); |
58ddafae2 bq20z75: Add supp... |
526 |
|
3ddca062f sbs-battery: Rena... |
527 528 |
if (chip->ignore_changes > 0) { chip->ignore_changes--; |
58ddafae2 bq20z75: Add supp... |
529 530 531 532 |
return; } /* cancel outstanding work */ |
3ddca062f sbs-battery: Rena... |
533 |
cancel_delayed_work_sync(&chip->work); |
58ddafae2 bq20z75: Add supp... |
534 |
|
3ddca062f sbs-battery: Rena... |
535 536 |
schedule_delayed_work(&chip->work, HZ); chip->poll_time = chip->pdata->poll_retry_count; |
58ddafae2 bq20z75: Add supp... |
537 |
} |
3ddca062f sbs-battery: Rena... |
538 |
static void sbs_delayed_work(struct work_struct *work) |
58ddafae2 bq20z75: Add supp... |
539 |
{ |
3ddca062f sbs-battery: Rena... |
540 |
struct sbs_info *chip; |
58ddafae2 bq20z75: Add supp... |
541 |
s32 ret; |
3ddca062f sbs-battery: Rena... |
542 |
chip = container_of(work, struct sbs_info, work.work); |
58ddafae2 bq20z75: Add supp... |
543 |
|
3ddca062f sbs-battery: Rena... |
544 |
ret = sbs_read_word_data(chip->client, sbs_data[REG_STATUS].addr); |
58ddafae2 bq20z75: Add supp... |
545 546 |
/* if the read failed, give up on this work */ if (ret < 0) { |
3ddca062f sbs-battery: Rena... |
547 |
chip->poll_time = 0; |
58ddafae2 bq20z75: Add supp... |
548 549 550 551 552 553 554 555 556 557 558 |
return; } if (ret & BATTERY_FULL_CHARGED) ret = POWER_SUPPLY_STATUS_FULL; else if (ret & BATTERY_FULL_DISCHARGED) ret = POWER_SUPPLY_STATUS_NOT_CHARGING; else if (ret & BATTERY_DISCHARGING) ret = POWER_SUPPLY_STATUS_DISCHARGING; else ret = POWER_SUPPLY_STATUS_CHARGING; |
3ddca062f sbs-battery: Rena... |
559 560 561 |
if (chip->last_state != ret) { chip->poll_time = 0; power_supply_changed(&chip->power_supply); |
58ddafae2 bq20z75: Add supp... |
562 563 |
return; } |
3ddca062f sbs-battery: Rena... |
564 565 566 |
if (chip->poll_time > 0) { schedule_delayed_work(&chip->work, HZ); chip->poll_time--; |
58ddafae2 bq20z75: Add supp... |
567 568 569 |
return; } } |
6c75ea1e5 bq20z75: Devicetr... |
570 571 572 573 |
#if defined(CONFIG_OF) #include <linux/of_device.h> #include <linux/of_gpio.h> |
3ddca062f sbs-battery: Rena... |
574 575 |
static const struct of_device_id sbs_dt_ids[] = { { .compatible = "sbs,sbs-battery" }, |
6c75ea1e5 bq20z75: Devicetr... |
576 577 578 |
{ .compatible = "ti,bq20z75" }, { } }; |
62df3935a sbs-battery: Fix ... |
579 |
MODULE_DEVICE_TABLE(of, sbs_dt_ids); |
6c75ea1e5 bq20z75: Devicetr... |
580 |
|
3ddca062f sbs-battery: Rena... |
581 |
static struct sbs_platform_data *sbs_of_populate_pdata( |
6c75ea1e5 bq20z75: Devicetr... |
582 583 584 |
struct i2c_client *client) { struct device_node *of_node = client->dev.of_node; |
3ddca062f sbs-battery: Rena... |
585 |
struct sbs_platform_data *pdata = client->dev.platform_data; |
6c75ea1e5 bq20z75: Devicetr... |
586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 |
enum of_gpio_flags gpio_flags; int rc; u32 prop; /* verify this driver matches this device */ if (!of_node) return NULL; /* if platform data is set, honor it */ if (pdata) return pdata; /* first make sure at least one property is set, otherwise * it won't change behavior from running without pdata. */ |
3ddca062f sbs-battery: Rena... |
601 602 603 |
if (!of_get_property(of_node, "sbs,i2c-retry-count", NULL) && !of_get_property(of_node, "sbs,poll-retry-count", NULL) && !of_get_property(of_node, "sbs,battery-detect-gpios", NULL)) |
6c75ea1e5 bq20z75: Devicetr... |
604 |
goto of_out; |
3ddca062f sbs-battery: Rena... |
605 |
pdata = devm_kzalloc(&client->dev, sizeof(struct sbs_platform_data), |
6c75ea1e5 bq20z75: Devicetr... |
606 607 608 |
GFP_KERNEL); if (!pdata) goto of_out; |
3ddca062f sbs-battery: Rena... |
609 |
rc = of_property_read_u32(of_node, "sbs,i2c-retry-count", &prop); |
6c75ea1e5 bq20z75: Devicetr... |
610 611 |
if (!rc) pdata->i2c_retry_count = prop; |
3ddca062f sbs-battery: Rena... |
612 |
rc = of_property_read_u32(of_node, "sbs,poll-retry-count", &prop); |
6c75ea1e5 bq20z75: Devicetr... |
613 614 |
if (!rc) pdata->poll_retry_count = prop; |
3ddca062f sbs-battery: Rena... |
615 |
if (!of_get_property(of_node, "sbs,battery-detect-gpios", NULL)) { |
6c75ea1e5 bq20z75: Devicetr... |
616 617 618 619 620 |
pdata->battery_detect = -1; goto of_out; } pdata->battery_detect = of_get_named_gpio_flags(of_node, |
3ddca062f sbs-battery: Rena... |
621 |
"sbs,battery-detect-gpios", 0, &gpio_flags); |
6c75ea1e5 bq20z75: Devicetr... |
622 623 624 625 626 627 628 629 630 631 |
if (gpio_flags & OF_GPIO_ACTIVE_LOW) pdata->battery_detect_present = 0; else pdata->battery_detect_present = 1; of_out: return pdata; } #else |
3ddca062f sbs-battery: Rena... |
632 633 |
#define sbs_dt_ids NULL static struct sbs_platform_data *sbs_of_populate_pdata( |
6c75ea1e5 bq20z75: Devicetr... |
634 635 636 637 638 |
struct i2c_client *client) { return client->dev.platform_data; } #endif |
3ddca062f sbs-battery: Rena... |
639 |
static int __devinit sbs_probe(struct i2c_client *client, |
a7640bfa1 power_supply: Add... |
640 641 |
const struct i2c_device_id *id) { |
3ddca062f sbs-battery: Rena... |
642 643 |
struct sbs_info *chip; struct sbs_platform_data *pdata = client->dev.platform_data; |
a7640bfa1 power_supply: Add... |
644 |
int rc; |
bb8791016 bq20z75: Add opti... |
645 |
int irq; |
52f56c69b sbs-battery: Chan... |
646 |
char *name; |
a7640bfa1 power_supply: Add... |
647 |
|
52f56c69b sbs-battery: Chan... |
648 649 650 651 |
name = kasprintf(GFP_KERNEL, "sbs-%s", dev_name(&client->dev)); if (!name) { dev_err(&client->dev, "Failed to allocate device name "); |
a7640bfa1 power_supply: Add... |
652 |
return -ENOMEM; |
52f56c69b sbs-battery: Chan... |
653 654 655 656 657 658 659 |
} chip = kzalloc(sizeof(struct sbs_info), GFP_KERNEL); if (!chip) { rc = -ENOMEM; goto exit_free_name; } |
a7640bfa1 power_supply: Add... |
660 |
|
3ddca062f sbs-battery: Rena... |
661 662 663 |
chip->client = client; chip->enable_detection = false; chip->gpio_detect = false; |
52f56c69b sbs-battery: Chan... |
664 |
chip->power_supply.name = name; |
3ddca062f sbs-battery: Rena... |
665 666 667 668 |
chip->power_supply.type = POWER_SUPPLY_TYPE_BATTERY; chip->power_supply.properties = sbs_properties; chip->power_supply.num_properties = ARRAY_SIZE(sbs_properties); chip->power_supply.get_property = sbs_get_property; |
58ddafae2 bq20z75: Add supp... |
669 670 671 |
/* ignore first notification of external change, it is generated * from the power_supply_register call back */ |
3ddca062f sbs-battery: Rena... |
672 673 674 |
chip->ignore_changes = 1; chip->last_state = POWER_SUPPLY_STATUS_UNKNOWN; chip->power_supply.external_power_changed = sbs_external_power_changed; |
a7640bfa1 power_supply: Add... |
675 |
|
3ddca062f sbs-battery: Rena... |
676 |
pdata = sbs_of_populate_pdata(client); |
6c75ea1e5 bq20z75: Devicetr... |
677 |
|
bb8791016 bq20z75: Add opti... |
678 |
if (pdata) { |
3ddca062f sbs-battery: Rena... |
679 680 |
chip->gpio_detect = gpio_is_valid(pdata->battery_detect); chip->pdata = pdata; |
bb8791016 bq20z75: Add opti... |
681 |
} |
3ddca062f sbs-battery: Rena... |
682 |
i2c_set_clientdata(client, chip); |
a7640bfa1 power_supply: Add... |
683 |
|
3ddca062f sbs-battery: Rena... |
684 |
if (!chip->gpio_detect) |
bb8791016 bq20z75: Add opti... |
685 686 687 688 689 690 |
goto skip_gpio; rc = gpio_request(pdata->battery_detect, dev_name(&client->dev)); if (rc) { dev_warn(&client->dev, "Failed to request gpio: %d ", rc); |
3ddca062f sbs-battery: Rena... |
691 |
chip->gpio_detect = false; |
bb8791016 bq20z75: Add opti... |
692 693 694 695 696 697 698 699 |
goto skip_gpio; } rc = gpio_direction_input(pdata->battery_detect); if (rc) { dev_warn(&client->dev, "Failed to get gpio as input: %d ", rc); gpio_free(pdata->battery_detect); |
3ddca062f sbs-battery: Rena... |
700 |
chip->gpio_detect = false; |
bb8791016 bq20z75: Add opti... |
701 702 703 704 705 706 707 708 |
goto skip_gpio; } irq = gpio_to_irq(pdata->battery_detect); if (irq <= 0) { dev_warn(&client->dev, "Failed to get gpio as irq: %d ", irq); gpio_free(pdata->battery_detect); |
3ddca062f sbs-battery: Rena... |
709 |
chip->gpio_detect = false; |
bb8791016 bq20z75: Add opti... |
710 711 |
goto skip_gpio; } |
3ddca062f sbs-battery: Rena... |
712 |
rc = request_irq(irq, sbs_irq, |
bb8791016 bq20z75: Add opti... |
713 |
IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING, |
3ddca062f sbs-battery: Rena... |
714 |
dev_name(&client->dev), &chip->power_supply); |
bb8791016 bq20z75: Add opti... |
715 716 717 718 |
if (rc) { dev_warn(&client->dev, "Failed to request irq: %d ", rc); gpio_free(pdata->battery_detect); |
3ddca062f sbs-battery: Rena... |
719 |
chip->gpio_detect = false; |
bb8791016 bq20z75: Add opti... |
720 721 |
goto skip_gpio; } |
3ddca062f sbs-battery: Rena... |
722 |
chip->irq = irq; |
bb8791016 bq20z75: Add opti... |
723 724 |
skip_gpio: |
3ddca062f sbs-battery: Rena... |
725 |
rc = power_supply_register(&client->dev, &chip->power_supply); |
a7640bfa1 power_supply: Add... |
726 727 728 729 |
if (rc) { dev_err(&client->dev, "%s: Failed to register power supply ", __func__); |
bb8791016 bq20z75: Add opti... |
730 |
goto exit_psupply; |
a7640bfa1 power_supply: Add... |
731 732 733 734 735 |
} dev_info(&client->dev, "%s: battery gas gauge device registered ", client->name); |
3ddca062f sbs-battery: Rena... |
736 |
INIT_DELAYED_WORK(&chip->work, sbs_delayed_work); |
58ddafae2 bq20z75: Add supp... |
737 |
|
3ddca062f sbs-battery: Rena... |
738 |
chip->enable_detection = true; |
ee177d96e bq20z75: Enable d... |
739 |
|
a7640bfa1 power_supply: Add... |
740 |
return 0; |
bb8791016 bq20z75: Add opti... |
741 742 |
exit_psupply: |
3ddca062f sbs-battery: Rena... |
743 744 745 |
if (chip->irq) free_irq(chip->irq, &chip->power_supply); if (chip->gpio_detect) |
bb8791016 bq20z75: Add opti... |
746 |
gpio_free(pdata->battery_detect); |
3ddca062f sbs-battery: Rena... |
747 |
kfree(chip); |
bb8791016 bq20z75: Add opti... |
748 |
|
52f56c69b sbs-battery: Chan... |
749 750 |
exit_free_name: kfree(name); |
bb8791016 bq20z75: Add opti... |
751 |
return rc; |
a7640bfa1 power_supply: Add... |
752 |
} |
3ddca062f sbs-battery: Rena... |
753 |
static int __devexit sbs_remove(struct i2c_client *client) |
a7640bfa1 power_supply: Add... |
754 |
{ |
3ddca062f sbs-battery: Rena... |
755 |
struct sbs_info *chip = i2c_get_clientdata(client); |
a7640bfa1 power_supply: Add... |
756 |
|
3ddca062f sbs-battery: Rena... |
757 758 759 760 |
if (chip->irq) free_irq(chip->irq, &chip->power_supply); if (chip->gpio_detect) gpio_free(chip->pdata->battery_detect); |
bb8791016 bq20z75: Add opti... |
761 |
|
3ddca062f sbs-battery: Rena... |
762 |
power_supply_unregister(&chip->power_supply); |
58ddafae2 bq20z75: Add supp... |
763 |
|
3ddca062f sbs-battery: Rena... |
764 |
cancel_delayed_work_sync(&chip->work); |
58ddafae2 bq20z75: Add supp... |
765 |
|
52f56c69b sbs-battery: Chan... |
766 |
kfree(chip->power_supply.name); |
3ddca062f sbs-battery: Rena... |
767 768 |
kfree(chip); chip = NULL; |
a7640bfa1 power_supply: Add... |
769 770 771 772 773 |
return 0; } #if defined CONFIG_PM |
3ddca062f sbs-battery: Rena... |
774 |
static int sbs_suspend(struct i2c_client *client, |
a7640bfa1 power_supply: Add... |
775 776 |
pm_message_t state) { |
3ddca062f sbs-battery: Rena... |
777 |
struct sbs_info *chip = i2c_get_clientdata(client); |
a7640bfa1 power_supply: Add... |
778 |
s32 ret; |
3ddca062f sbs-battery: Rena... |
779 780 |
if (chip->poll_time > 0) cancel_delayed_work_sync(&chip->work); |
58ddafae2 bq20z75: Add supp... |
781 |
|
a7640bfa1 power_supply: Add... |
782 |
/* write to manufacturer access with sleep command */ |
3ddca062f sbs-battery: Rena... |
783 |
ret = sbs_write_word_data(client, sbs_data[REG_MANUFACTURER_DATA].addr, |
a7640bfa1 power_supply: Add... |
784 |
MANUFACTURER_ACCESS_SLEEP); |
3ddca062f sbs-battery: Rena... |
785 |
if (chip->is_present && ret < 0) |
d3ab61ecb bq20z75: Add supp... |
786 |
return ret; |
a7640bfa1 power_supply: Add... |
787 788 789 790 |
return 0; } #else |
3ddca062f sbs-battery: Rena... |
791 |
#define sbs_suspend NULL |
a7640bfa1 power_supply: Add... |
792 |
#endif |
3ddca062f sbs-battery: Rena... |
793 794 |
/* any smbus transaction will wake up sbs */ #define sbs_resume NULL |
a7640bfa1 power_supply: Add... |
795 |
|
3ddca062f sbs-battery: Rena... |
796 |
static const struct i2c_device_id sbs_id[] = { |
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797 |
{ "bq20z75", 0 }, |
3ddca062f sbs-battery: Rena... |
798 |
{ "sbs-battery", 1 }, |
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799 800 |
{} }; |
3ddca062f sbs-battery: Rena... |
801 802 803 804 805 806 807 808 |
MODULE_DEVICE_TABLE(i2c, sbs_id); static struct i2c_driver sbs_battery_driver = { .probe = sbs_probe, .remove = __devexit_p(sbs_remove), .suspend = sbs_suspend, .resume = sbs_resume, .id_table = sbs_id, |
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809 |
.driver = { |
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810 811 |
.name = "sbs-battery", .of_match_table = sbs_dt_ids, |
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812 813 |
}, }; |
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814 |
static int __init sbs_battery_init(void) |
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815 |
{ |
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816 |
return i2c_add_driver(&sbs_battery_driver); |
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817 |
} |
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818 |
module_init(sbs_battery_init); |
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819 |
|
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820 |
static void __exit sbs_battery_exit(void) |
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821 |
{ |
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822 |
i2c_del_driver(&sbs_battery_driver); |
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823 |
} |
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824 |
module_exit(sbs_battery_exit); |
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825 |
|
3ddca062f sbs-battery: Rena... |
826 |
MODULE_DESCRIPTION("SBS battery monitor driver"); |
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827 |
MODULE_LICENSE("GPL"); |