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1267 lines
32 KiB
1267 lines
32 KiB
// SPDX-License-Identifier: GPL-2.0-or-later |
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/* |
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* Gas Gauge driver for SBS Compliant Batteries |
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* |
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* Copyright (c) 2010, NVIDIA Corporation. |
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*/ |
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|
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#include <linux/bits.h> |
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#include <linux/delay.h> |
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#include <linux/err.h> |
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#include <linux/gpio/consumer.h> |
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#include <linux/i2c.h> |
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#include <linux/init.h> |
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#include <linux/interrupt.h> |
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#include <linux/kernel.h> |
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#include <linux/module.h> |
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#include <linux/property.h> |
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#include <linux/of_device.h> |
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#include <linux/power/sbs-battery.h> |
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#include <linux/power_supply.h> |
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#include <linux/slab.h> |
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#include <linux/stat.h> |
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|
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enum { |
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REG_MANUFACTURER_DATA, |
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REG_BATTERY_MODE, |
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REG_TEMPERATURE, |
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REG_VOLTAGE, |
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REG_CURRENT_NOW, |
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REG_CURRENT_AVG, |
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REG_MAX_ERR, |
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REG_CAPACITY, |
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REG_TIME_TO_EMPTY, |
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REG_TIME_TO_FULL, |
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REG_STATUS, |
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REG_CAPACITY_LEVEL, |
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REG_CYCLE_COUNT, |
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REG_SERIAL_NUMBER, |
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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_MIN, |
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REG_DESIGN_VOLTAGE_MAX, |
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REG_CHEMISTRY, |
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REG_MANUFACTURER, |
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REG_MODEL_NAME, |
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REG_CHARGE_CURRENT, |
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REG_CHARGE_VOLTAGE, |
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}; |
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|
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#define REG_ADDR_SPEC_INFO 0x1A |
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#define SPEC_INFO_VERSION_MASK GENMASK(7, 4) |
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#define SPEC_INFO_VERSION_SHIFT 4 |
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|
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#define SBS_VERSION_1_0 1 |
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#define SBS_VERSION_1_1 2 |
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#define SBS_VERSION_1_1_WITH_PEC 3 |
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|
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#define REG_ADDR_MANUFACTURE_DATE 0x1B |
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|
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/* Battery Mode defines */ |
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#define BATTERY_MODE_OFFSET 0x03 |
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#define BATTERY_MODE_CAPACITY_MASK BIT(15) |
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enum sbs_capacity_mode { |
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CAPACITY_MODE_AMPS = 0, |
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CAPACITY_MODE_WATTS = BATTERY_MODE_CAPACITY_MASK |
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}; |
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#define BATTERY_MODE_CHARGER_MASK (1<<14) |
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|
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/* manufacturer access defines */ |
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#define MANUFACTURER_ACCESS_STATUS 0x0006 |
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#define MANUFACTURER_ACCESS_SLEEP 0x0011 |
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|
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/* battery status value bits */ |
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#define BATTERY_INITIALIZED 0x80 |
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#define BATTERY_DISCHARGING 0x40 |
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#define BATTERY_FULL_CHARGED 0x20 |
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#define BATTERY_FULL_DISCHARGED 0x10 |
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|
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/* min_value and max_value are only valid for numerical data */ |
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#define SBS_DATA(_psp, _addr, _min_value, _max_value) { \ |
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.psp = _psp, \ |
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.addr = _addr, \ |
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.min_value = _min_value, \ |
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.max_value = _max_value, \ |
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} |
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|
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static const struct chip_data { |
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enum power_supply_property psp; |
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u8 addr; |
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int min_value; |
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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_BATTERY_MODE] = |
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SBS_DATA(-1, 0x03, 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_NOW] = |
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SBS_DATA(POWER_SUPPLY_PROP_CURRENT_NOW, 0x0A, -32768, 32767), |
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[REG_CURRENT_AVG] = |
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SBS_DATA(POWER_SUPPLY_PROP_CURRENT_AVG, 0x0B, -32768, 32767), |
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[REG_MAX_ERR] = |
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SBS_DATA(POWER_SUPPLY_PROP_CAPACITY_ERROR_MARGIN, 0x0c, 0, 100), |
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[REG_CAPACITY] = |
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SBS_DATA(POWER_SUPPLY_PROP_CAPACITY, 0x0D, 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_CHARGE_CURRENT] = |
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SBS_DATA(POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX, 0x14, 0, 65535), |
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[REG_CHARGE_VOLTAGE] = |
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SBS_DATA(POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX, 0x15, 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_CAPACITY_LEVEL] = |
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SBS_DATA(POWER_SUPPLY_PROP_CAPACITY_LEVEL, 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_MIN] = |
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SBS_DATA(POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN, 0x19, 0, 65535), |
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[REG_DESIGN_VOLTAGE_MAX] = |
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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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/* Properties of type `const char *' */ |
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[REG_MANUFACTURER] = |
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SBS_DATA(POWER_SUPPLY_PROP_MANUFACTURER, 0x20, 0, 65535), |
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[REG_MODEL_NAME] = |
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SBS_DATA(POWER_SUPPLY_PROP_MODEL_NAME, 0x21, 0, 65535), |
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[REG_CHEMISTRY] = |
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SBS_DATA(POWER_SUPPLY_PROP_TECHNOLOGY, 0x22, 0, 65535) |
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}; |
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|
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static const enum power_supply_property sbs_properties[] = { |
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POWER_SUPPLY_PROP_STATUS, |
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POWER_SUPPLY_PROP_CAPACITY_LEVEL, |
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POWER_SUPPLY_PROP_HEALTH, |
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POWER_SUPPLY_PROP_PRESENT, |
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POWER_SUPPLY_PROP_TECHNOLOGY, |
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POWER_SUPPLY_PROP_CYCLE_COUNT, |
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POWER_SUPPLY_PROP_VOLTAGE_NOW, |
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POWER_SUPPLY_PROP_CURRENT_NOW, |
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POWER_SUPPLY_PROP_CURRENT_AVG, |
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POWER_SUPPLY_PROP_CAPACITY, |
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POWER_SUPPLY_PROP_CAPACITY_ERROR_MARGIN, |
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POWER_SUPPLY_PROP_TEMP, |
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POWER_SUPPLY_PROP_TIME_TO_EMPTY_AVG, |
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POWER_SUPPLY_PROP_TIME_TO_FULL_AVG, |
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POWER_SUPPLY_PROP_SERIAL_NUMBER, |
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POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN, |
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POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN, |
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POWER_SUPPLY_PROP_ENERGY_NOW, |
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POWER_SUPPLY_PROP_ENERGY_FULL, |
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POWER_SUPPLY_PROP_ENERGY_FULL_DESIGN, |
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POWER_SUPPLY_PROP_CHARGE_NOW, |
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POWER_SUPPLY_PROP_CHARGE_FULL, |
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POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN, |
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POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX, |
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POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX, |
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POWER_SUPPLY_PROP_MANUFACTURE_YEAR, |
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POWER_SUPPLY_PROP_MANUFACTURE_MONTH, |
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POWER_SUPPLY_PROP_MANUFACTURE_DAY, |
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/* Properties of type `const char *' */ |
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POWER_SUPPLY_PROP_MANUFACTURER, |
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POWER_SUPPLY_PROP_MODEL_NAME |
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}; |
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|
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/* Supports special manufacturer commands from TI BQ20Z65 and BQ20Z75 IC. */ |
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#define SBS_FLAGS_TI_BQ20ZX5 BIT(0) |
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|
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struct sbs_info { |
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struct i2c_client *client; |
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struct power_supply *power_supply; |
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bool is_present; |
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struct gpio_desc *gpio_detect; |
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bool charger_broadcasts; |
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int last_state; |
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int poll_time; |
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u32 i2c_retry_count; |
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u32 poll_retry_count; |
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struct delayed_work work; |
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struct mutex mode_lock; |
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u32 flags; |
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}; |
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|
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static char model_name[I2C_SMBUS_BLOCK_MAX + 1]; |
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static char manufacturer[I2C_SMBUS_BLOCK_MAX + 1]; |
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static char chemistry[I2C_SMBUS_BLOCK_MAX + 1]; |
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static bool force_load; |
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|
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static int sbs_read_word_data(struct i2c_client *client, u8 address); |
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static int sbs_write_word_data(struct i2c_client *client, u8 address, u16 value); |
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|
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static void sbs_disable_charger_broadcasts(struct sbs_info *chip) |
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{ |
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int val = sbs_read_word_data(chip->client, BATTERY_MODE_OFFSET); |
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if (val < 0) |
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goto exit; |
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val |= BATTERY_MODE_CHARGER_MASK; |
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|
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val = sbs_write_word_data(chip->client, BATTERY_MODE_OFFSET, val); |
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|
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exit: |
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if (val < 0) |
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dev_err(&chip->client->dev, |
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"Failed to disable charger broadcasting: %d\n", val); |
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else |
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dev_dbg(&chip->client->dev, "%s\n", __func__); |
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} |
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static int sbs_update_presence(struct sbs_info *chip, bool is_present) |
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{ |
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struct i2c_client *client = chip->client; |
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int retries = chip->i2c_retry_count; |
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s32 ret = 0; |
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u8 version; |
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|
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if (chip->is_present == is_present) |
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return 0; |
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if (!is_present) { |
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chip->is_present = false; |
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/* Disable PEC when no device is present */ |
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client->flags &= ~I2C_CLIENT_PEC; |
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return 0; |
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} |
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|
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/* Check if device supports packet error checking and use it */ |
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while (retries > 0) { |
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ret = i2c_smbus_read_word_data(client, REG_ADDR_SPEC_INFO); |
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if (ret >= 0) |
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break; |
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|
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/* |
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* Some batteries trigger the detection pin before the |
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* I2C bus is properly connected. This works around the |
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* issue. |
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*/ |
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msleep(100); |
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|
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retries--; |
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} |
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|
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if (ret < 0) { |
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dev_dbg(&client->dev, "failed to read spec info: %d\n", ret); |
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|
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/* fallback to old behaviour */ |
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client->flags &= ~I2C_CLIENT_PEC; |
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chip->is_present = true; |
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|
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return ret; |
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} |
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version = (ret & SPEC_INFO_VERSION_MASK) >> SPEC_INFO_VERSION_SHIFT; |
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|
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if (version == SBS_VERSION_1_1_WITH_PEC) |
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client->flags |= I2C_CLIENT_PEC; |
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else |
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client->flags &= ~I2C_CLIENT_PEC; |
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|
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if (of_device_is_compatible(client->dev.parent->of_node, "google,cros-ec-i2c-tunnel") |
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&& client->flags & I2C_CLIENT_PEC) { |
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dev_info(&client->dev, "Disabling PEC because of broken Cros-EC implementation\n"); |
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client->flags &= ~I2C_CLIENT_PEC; |
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} |
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|
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dev_dbg(&client->dev, "PEC: %s\n", (client->flags & I2C_CLIENT_PEC) ? |
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"enabled" : "disabled"); |
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|
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if (!chip->is_present && is_present && !chip->charger_broadcasts) |
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sbs_disable_charger_broadcasts(chip); |
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|
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chip->is_present = true; |
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|
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return 0; |
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} |
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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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int retries = chip->i2c_retry_count; |
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s32 ret = 0; |
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|
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while (retries > 0) { |
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ret = i2c_smbus_read_word_data(client, address); |
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if (ret >= 0) |
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break; |
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retries--; |
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} |
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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\n", |
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__func__, address); |
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return ret; |
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} |
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|
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return ret; |
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} |
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|
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static int sbs_read_string_data_fallback(struct i2c_client *client, u8 address, char *values) |
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{ |
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struct sbs_info *chip = i2c_get_clientdata(client); |
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s32 ret = 0, block_length = 0; |
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int retries_length, retries_block; |
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u8 block_buffer[I2C_SMBUS_BLOCK_MAX + 1]; |
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|
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retries_length = chip->i2c_retry_count; |
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retries_block = chip->i2c_retry_count; |
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|
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dev_warn_once(&client->dev, "I2C adapter does not support I2C_FUNC_SMBUS_READ_BLOCK_DATA.\n" |
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"Fallback method does not support PEC.\n"); |
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|
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/* Adapter needs to support these two functions */ |
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if (!i2c_check_functionality(client->adapter, |
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I2C_FUNC_SMBUS_BYTE_DATA | |
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I2C_FUNC_SMBUS_I2C_BLOCK)){ |
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return -ENODEV; |
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} |
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|
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/* Get the length of block data */ |
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while (retries_length > 0) { |
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ret = i2c_smbus_read_byte_data(client, address); |
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if (ret >= 0) |
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break; |
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retries_length--; |
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} |
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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\n", |
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__func__, address); |
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return ret; |
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} |
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|
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/* block_length does not include NULL terminator */ |
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block_length = ret; |
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if (block_length > I2C_SMBUS_BLOCK_MAX) { |
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dev_err(&client->dev, |
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"%s: Returned block_length is longer than 0x%x\n", |
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__func__, I2C_SMBUS_BLOCK_MAX); |
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return -EINVAL; |
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} |
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|
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/* Get the block data */ |
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while (retries_block > 0) { |
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ret = i2c_smbus_read_i2c_block_data( |
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client, address, |
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block_length + 1, block_buffer); |
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if (ret >= 0) |
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break; |
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retries_block--; |
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} |
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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\n", |
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__func__, address); |
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return ret; |
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} |
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|
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/* block_buffer[0] == block_length */ |
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memcpy(values, block_buffer + 1, block_length); |
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values[block_length] = '\0'; |
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|
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return ret; |
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} |
|
|
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static int sbs_read_string_data(struct i2c_client *client, u8 address, char *values) |
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{ |
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struct sbs_info *chip = i2c_get_clientdata(client); |
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int retries = chip->i2c_retry_count; |
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int ret = 0; |
|
|
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if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_READ_BLOCK_DATA)) { |
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bool pec = client->flags & I2C_CLIENT_PEC; |
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client->flags &= ~I2C_CLIENT_PEC; |
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ret = sbs_read_string_data_fallback(client, address, values); |
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if (pec) |
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client->flags |= I2C_CLIENT_PEC; |
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return ret; |
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} |
|
|
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while (retries > 0) { |
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ret = i2c_smbus_read_block_data(client, address, values); |
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if (ret >= 0) |
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break; |
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retries--; |
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} |
|
|
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if (ret < 0) { |
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dev_dbg(&client->dev, "failed to read block 0x%x: %d\n", address, ret); |
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return ret; |
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} |
|
|
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/* add string termination */ |
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values[ret] = '\0'; |
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return ret; |
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} |
|
|
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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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{ |
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struct sbs_info *chip = i2c_get_clientdata(client); |
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int retries = chip->i2c_retry_count; |
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s32 ret = 0; |
|
|
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while (retries > 0) { |
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ret = i2c_smbus_write_word_data(client, address, value); |
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if (ret >= 0) |
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break; |
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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\n", |
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__func__, address); |
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return ret; |
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} |
|
|
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return 0; |
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} |
|
|
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static int sbs_status_correct(struct i2c_client *client, int *intval) |
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{ |
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int ret; |
|
|
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ret = sbs_read_word_data(client, sbs_data[REG_CURRENT_NOW].addr); |
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if (ret < 0) |
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return ret; |
|
|
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ret = (s16)ret; |
|
|
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/* Not drawing current -> not charging (i.e. idle) */ |
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if (*intval != POWER_SUPPLY_STATUS_FULL && ret == 0) |
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*intval = POWER_SUPPLY_STATUS_NOT_CHARGING; |
|
|
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if (*intval == POWER_SUPPLY_STATUS_FULL) { |
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/* Drawing or providing current when full */ |
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if (ret > 0) |
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*intval = POWER_SUPPLY_STATUS_CHARGING; |
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else if (ret < 0) |
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*intval = POWER_SUPPLY_STATUS_DISCHARGING; |
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} |
|
|
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return 0; |
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} |
|
|
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static bool sbs_bat_needs_calibration(struct i2c_client *client) |
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{ |
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int ret; |
|
|
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ret = sbs_read_word_data(client, sbs_data[REG_BATTERY_MODE].addr); |
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if (ret < 0) |
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return false; |
|
|
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return !!(ret & BIT(7)); |
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} |
|
|
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static int sbs_get_ti_battery_presence_and_health( |
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struct i2c_client *client, enum power_supply_property psp, |
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union power_supply_propval *val) |
|
{ |
|
s32 ret; |
|
|
|
/* |
|
* Write to ManufacturerAccess with ManufacturerAccess command |
|
* and then read the status. |
|
*/ |
|
ret = sbs_write_word_data(client, sbs_data[REG_MANUFACTURER_DATA].addr, |
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MANUFACTURER_ACCESS_STATUS); |
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if (ret < 0) { |
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if (psp == POWER_SUPPLY_PROP_PRESENT) |
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val->intval = 0; /* battery removed */ |
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return ret; |
|
} |
|
|
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ret = sbs_read_word_data(client, sbs_data[REG_MANUFACTURER_DATA].addr); |
|
if (ret < 0) { |
|
if (psp == POWER_SUPPLY_PROP_PRESENT) |
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val->intval = 0; /* battery removed */ |
|
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 if (sbs_bat_needs_calibration(client)) |
|
val->intval = POWER_SUPPLY_HEALTH_CALIBRATION_REQUIRED; |
|
else |
|
val->intval = POWER_SUPPLY_HEALTH_GOOD; |
|
} |
|
|
|
return 0; |
|
} |
|
|
|
static int sbs_get_battery_presence_and_health( |
|
struct i2c_client *client, enum power_supply_property psp, |
|
union power_supply_propval *val) |
|
{ |
|
struct sbs_info *chip = i2c_get_clientdata(client); |
|
int ret; |
|
|
|
if (chip->flags & SBS_FLAGS_TI_BQ20ZX5) |
|
return sbs_get_ti_battery_presence_and_health(client, psp, val); |
|
|
|
/* Dummy command; if it succeeds, battery is present. */ |
|
ret = sbs_read_word_data(client, sbs_data[REG_STATUS].addr); |
|
|
|
if (ret < 0) { /* battery not present*/ |
|
if (psp == POWER_SUPPLY_PROP_PRESENT) { |
|
val->intval = 0; |
|
return 0; |
|
} |
|
return ret; |
|
} |
|
|
|
if (psp == POWER_SUPPLY_PROP_PRESENT) |
|
val->intval = 1; /* battery present */ |
|
else { /* POWER_SUPPLY_PROP_HEALTH */ |
|
if (sbs_bat_needs_calibration(client)) { |
|
val->intval = POWER_SUPPLY_HEALTH_CALIBRATION_REQUIRED; |
|
} else { |
|
/* SBS spec doesn't have a general health command. */ |
|
val->intval = POWER_SUPPLY_HEALTH_UNKNOWN; |
|
} |
|
} |
|
|
|
return 0; |
|
} |
|
|
|
static int sbs_get_battery_property(struct i2c_client *client, |
|
int reg_offset, enum power_supply_property psp, |
|
union power_supply_propval *val) |
|
{ |
|
struct sbs_info *chip = i2c_get_clientdata(client); |
|
s32 ret; |
|
|
|
ret = sbs_read_word_data(client, sbs_data[reg_offset].addr); |
|
if (ret < 0) |
|
return ret; |
|
|
|
/* returned values are 16 bit */ |
|
if (sbs_data[reg_offset].min_value < 0) |
|
ret = (s16)ret; |
|
|
|
if (ret >= sbs_data[reg_offset].min_value && |
|
ret <= sbs_data[reg_offset].max_value) { |
|
val->intval = ret; |
|
if (psp == POWER_SUPPLY_PROP_CAPACITY_LEVEL) { |
|
if (!(ret & BATTERY_INITIALIZED)) |
|
val->intval = |
|
POWER_SUPPLY_CAPACITY_LEVEL_UNKNOWN; |
|
else if (ret & BATTERY_FULL_CHARGED) |
|
val->intval = |
|
POWER_SUPPLY_CAPACITY_LEVEL_FULL; |
|
else if (ret & BATTERY_FULL_DISCHARGED) |
|
val->intval = |
|
POWER_SUPPLY_CAPACITY_LEVEL_CRITICAL; |
|
else |
|
val->intval = |
|
POWER_SUPPLY_CAPACITY_LEVEL_NORMAL; |
|
return 0; |
|
} else if (psp != POWER_SUPPLY_PROP_STATUS) { |
|
return 0; |
|
} |
|
|
|
if (ret & BATTERY_FULL_CHARGED) |
|
val->intval = POWER_SUPPLY_STATUS_FULL; |
|
else if (ret & BATTERY_DISCHARGING) |
|
val->intval = POWER_SUPPLY_STATUS_DISCHARGING; |
|
else |
|
val->intval = POWER_SUPPLY_STATUS_CHARGING; |
|
|
|
sbs_status_correct(client, &val->intval); |
|
|
|
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; |
|
} |
|
} else { |
|
if (psp == POWER_SUPPLY_PROP_STATUS) |
|
val->intval = POWER_SUPPLY_STATUS_UNKNOWN; |
|
else if (psp == POWER_SUPPLY_PROP_CAPACITY) |
|
/* sbs spec says that this can be >100 % |
|
* even if max value is 100 % |
|
*/ |
|
val->intval = min(ret, 100); |
|
else |
|
val->intval = 0; |
|
} |
|
|
|
return 0; |
|
} |
|
|
|
static int sbs_get_battery_string_property(struct i2c_client *client, |
|
int reg_offset, enum power_supply_property psp, char *val) |
|
{ |
|
s32 ret; |
|
|
|
ret = sbs_read_string_data(client, sbs_data[reg_offset].addr, val); |
|
|
|
if (ret < 0) |
|
return ret; |
|
|
|
return 0; |
|
} |
|
|
|
static void sbs_unit_adjustment(struct i2c_client *client, |
|
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) |
|
#define TIME_UNIT_CONVERSION 60 |
|
#define TEMP_KELVIN_TO_CELSIUS 2731 |
|
switch (psp) { |
|
case POWER_SUPPLY_PROP_ENERGY_NOW: |
|
case POWER_SUPPLY_PROP_ENERGY_FULL: |
|
case POWER_SUPPLY_PROP_ENERGY_FULL_DESIGN: |
|
/* sbs provides energy in units of 10mWh. |
|
* Convert to µWh |
|
*/ |
|
val->intval *= BATTERY_MODE_CAP_MULT_WATT; |
|
break; |
|
|
|
case POWER_SUPPLY_PROP_VOLTAGE_NOW: |
|
case POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN: |
|
case POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN: |
|
case POWER_SUPPLY_PROP_CURRENT_NOW: |
|
case POWER_SUPPLY_PROP_CURRENT_AVG: |
|
case POWER_SUPPLY_PROP_CHARGE_NOW: |
|
case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX: |
|
case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX: |
|
case POWER_SUPPLY_PROP_CHARGE_FULL: |
|
case POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN: |
|
val->intval *= BASE_UNIT_CONVERSION; |
|
break; |
|
|
|
case POWER_SUPPLY_PROP_TEMP: |
|
/* sbs provides battery temperature in 0.1K |
|
* so convert it to 0.1°C |
|
*/ |
|
val->intval -= TEMP_KELVIN_TO_CELSIUS; |
|
break; |
|
|
|
case POWER_SUPPLY_PROP_TIME_TO_EMPTY_AVG: |
|
case POWER_SUPPLY_PROP_TIME_TO_FULL_AVG: |
|
/* sbs provides time to empty and time to full in minutes. |
|
* Convert to seconds |
|
*/ |
|
val->intval *= TIME_UNIT_CONVERSION; |
|
break; |
|
|
|
default: |
|
dev_dbg(&client->dev, |
|
"%s: no need for unit conversion %d\n", __func__, psp); |
|
} |
|
} |
|
|
|
static enum sbs_capacity_mode sbs_set_capacity_mode(struct i2c_client *client, |
|
enum sbs_capacity_mode mode) |
|
{ |
|
int ret, original_val; |
|
|
|
original_val = sbs_read_word_data(client, BATTERY_MODE_OFFSET); |
|
if (original_val < 0) |
|
return original_val; |
|
|
|
if ((original_val & BATTERY_MODE_CAPACITY_MASK) == mode) |
|
return mode; |
|
|
|
if (mode == CAPACITY_MODE_AMPS) |
|
ret = original_val & ~BATTERY_MODE_CAPACITY_MASK; |
|
else |
|
ret = original_val | BATTERY_MODE_CAPACITY_MASK; |
|
|
|
ret = sbs_write_word_data(client, BATTERY_MODE_OFFSET, ret); |
|
if (ret < 0) |
|
return ret; |
|
|
|
usleep_range(1000, 2000); |
|
|
|
return original_val & BATTERY_MODE_CAPACITY_MASK; |
|
} |
|
|
|
static int sbs_get_battery_capacity(struct i2c_client *client, |
|
int reg_offset, enum power_supply_property psp, |
|
union power_supply_propval *val) |
|
{ |
|
s32 ret; |
|
enum sbs_capacity_mode mode = CAPACITY_MODE_WATTS; |
|
|
|
if (power_supply_is_amp_property(psp)) |
|
mode = CAPACITY_MODE_AMPS; |
|
|
|
mode = sbs_set_capacity_mode(client, mode); |
|
if ((int)mode < 0) |
|
return mode; |
|
|
|
ret = sbs_read_word_data(client, sbs_data[reg_offset].addr); |
|
if (ret < 0) |
|
return ret; |
|
|
|
val->intval = ret; |
|
|
|
ret = sbs_set_capacity_mode(client, mode); |
|
if (ret < 0) |
|
return ret; |
|
|
|
return 0; |
|
} |
|
|
|
static char sbs_serial[5]; |
|
static int sbs_get_battery_serial_number(struct i2c_client *client, |
|
union power_supply_propval *val) |
|
{ |
|
int ret; |
|
|
|
ret = sbs_read_word_data(client, sbs_data[REG_SERIAL_NUMBER].addr); |
|
if (ret < 0) |
|
return ret; |
|
|
|
sprintf(sbs_serial, "%04x", ret); |
|
val->strval = sbs_serial; |
|
|
|
return 0; |
|
} |
|
|
|
static int sbs_get_property_index(struct i2c_client *client, |
|
enum power_supply_property psp) |
|
{ |
|
int count; |
|
for (count = 0; count < ARRAY_SIZE(sbs_data); count++) |
|
if (psp == sbs_data[count].psp) |
|
return count; |
|
|
|
dev_warn(&client->dev, |
|
"%s: Invalid Property - %d\n", __func__, psp); |
|
|
|
return -EINVAL; |
|
} |
|
|
|
static int sbs_get_chemistry(struct i2c_client *client, |
|
union power_supply_propval *val) |
|
{ |
|
enum power_supply_property psp = POWER_SUPPLY_PROP_TECHNOLOGY; |
|
int ret; |
|
|
|
ret = sbs_get_property_index(client, psp); |
|
if (ret < 0) |
|
return ret; |
|
|
|
ret = sbs_get_battery_string_property(client, ret, psp, |
|
chemistry); |
|
if (ret < 0) |
|
return ret; |
|
|
|
if (!strncasecmp(chemistry, "LION", 4)) |
|
val->intval = POWER_SUPPLY_TECHNOLOGY_LION; |
|
else if (!strncasecmp(chemistry, "LiP", 3)) |
|
val->intval = POWER_SUPPLY_TECHNOLOGY_LIPO; |
|
else if (!strncasecmp(chemistry, "NiCd", 4)) |
|
val->intval = POWER_SUPPLY_TECHNOLOGY_NiCd; |
|
else if (!strncasecmp(chemistry, "NiMH", 4)) |
|
val->intval = POWER_SUPPLY_TECHNOLOGY_NiMH; |
|
else |
|
val->intval = POWER_SUPPLY_TECHNOLOGY_UNKNOWN; |
|
|
|
if (val->intval == POWER_SUPPLY_TECHNOLOGY_UNKNOWN) |
|
dev_warn(&client->dev, "Unknown chemistry: %s\n", chemistry); |
|
|
|
return 0; |
|
} |
|
|
|
static int sbs_get_battery_manufacture_date(struct i2c_client *client, |
|
enum power_supply_property psp, |
|
union power_supply_propval *val) |
|
{ |
|
int ret; |
|
u16 day, month, year; |
|
|
|
ret = sbs_read_word_data(client, REG_ADDR_MANUFACTURE_DATE); |
|
if (ret < 0) |
|
return ret; |
|
|
|
day = ret & GENMASK(4, 0); |
|
month = (ret & GENMASK(8, 5)) >> 5; |
|
year = ((ret & GENMASK(15, 9)) >> 9) + 1980; |
|
|
|
switch (psp) { |
|
case POWER_SUPPLY_PROP_MANUFACTURE_YEAR: |
|
val->intval = year; |
|
break; |
|
case POWER_SUPPLY_PROP_MANUFACTURE_MONTH: |
|
val->intval = month; |
|
break; |
|
case POWER_SUPPLY_PROP_MANUFACTURE_DAY: |
|
val->intval = day; |
|
break; |
|
default: |
|
return -EINVAL; |
|
} |
|
|
|
return 0; |
|
} |
|
|
|
static int sbs_get_property(struct power_supply *psy, |
|
enum power_supply_property psp, |
|
union power_supply_propval *val) |
|
{ |
|
int ret = 0; |
|
struct sbs_info *chip = power_supply_get_drvdata(psy); |
|
struct i2c_client *client = chip->client; |
|
|
|
if (chip->gpio_detect) { |
|
ret = gpiod_get_value_cansleep(chip->gpio_detect); |
|
if (ret < 0) |
|
return ret; |
|
if (psp == POWER_SUPPLY_PROP_PRESENT) { |
|
val->intval = ret; |
|
sbs_update_presence(chip, ret); |
|
return 0; |
|
} |
|
if (ret == 0) |
|
return -ENODATA; |
|
} |
|
|
|
switch (psp) { |
|
case POWER_SUPPLY_PROP_PRESENT: |
|
case POWER_SUPPLY_PROP_HEALTH: |
|
ret = sbs_get_battery_presence_and_health(client, psp, val); |
|
|
|
/* this can only be true if no gpio is used */ |
|
if (psp == POWER_SUPPLY_PROP_PRESENT) |
|
return 0; |
|
break; |
|
|
|
case POWER_SUPPLY_PROP_TECHNOLOGY: |
|
ret = sbs_get_chemistry(client, val); |
|
if (ret < 0) |
|
break; |
|
|
|
goto done; /* don't trigger power_supply_changed()! */ |
|
|
|
case POWER_SUPPLY_PROP_ENERGY_NOW: |
|
case POWER_SUPPLY_PROP_ENERGY_FULL: |
|
case POWER_SUPPLY_PROP_ENERGY_FULL_DESIGN: |
|
case POWER_SUPPLY_PROP_CHARGE_NOW: |
|
case POWER_SUPPLY_PROP_CHARGE_FULL: |
|
case POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN: |
|
ret = sbs_get_property_index(client, psp); |
|
if (ret < 0) |
|
break; |
|
|
|
/* sbs_get_battery_capacity() will change the battery mode |
|
* temporarily to read the requested attribute. Ensure we stay |
|
* in the desired mode for the duration of the attribute read. |
|
*/ |
|
mutex_lock(&chip->mode_lock); |
|
ret = sbs_get_battery_capacity(client, ret, psp, val); |
|
mutex_unlock(&chip->mode_lock); |
|
break; |
|
|
|
case POWER_SUPPLY_PROP_SERIAL_NUMBER: |
|
ret = sbs_get_battery_serial_number(client, val); |
|
break; |
|
|
|
case POWER_SUPPLY_PROP_STATUS: |
|
case POWER_SUPPLY_PROP_CAPACITY_LEVEL: |
|
case POWER_SUPPLY_PROP_CYCLE_COUNT: |
|
case POWER_SUPPLY_PROP_VOLTAGE_NOW: |
|
case POWER_SUPPLY_PROP_CURRENT_NOW: |
|
case POWER_SUPPLY_PROP_CURRENT_AVG: |
|
case POWER_SUPPLY_PROP_TEMP: |
|
case POWER_SUPPLY_PROP_TIME_TO_EMPTY_AVG: |
|
case POWER_SUPPLY_PROP_TIME_TO_FULL_AVG: |
|
case POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN: |
|
case POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN: |
|
case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX: |
|
case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX: |
|
case POWER_SUPPLY_PROP_CAPACITY: |
|
case POWER_SUPPLY_PROP_CAPACITY_ERROR_MARGIN: |
|
ret = sbs_get_property_index(client, psp); |
|
if (ret < 0) |
|
break; |
|
|
|
ret = sbs_get_battery_property(client, ret, psp, val); |
|
break; |
|
|
|
case POWER_SUPPLY_PROP_MODEL_NAME: |
|
ret = sbs_get_property_index(client, psp); |
|
if (ret < 0) |
|
break; |
|
|
|
ret = sbs_get_battery_string_property(client, ret, psp, |
|
model_name); |
|
val->strval = model_name; |
|
break; |
|
|
|
case POWER_SUPPLY_PROP_MANUFACTURER: |
|
ret = sbs_get_property_index(client, psp); |
|
if (ret < 0) |
|
break; |
|
|
|
ret = sbs_get_battery_string_property(client, ret, psp, |
|
manufacturer); |
|
val->strval = manufacturer; |
|
break; |
|
|
|
case POWER_SUPPLY_PROP_MANUFACTURE_YEAR: |
|
case POWER_SUPPLY_PROP_MANUFACTURE_MONTH: |
|
case POWER_SUPPLY_PROP_MANUFACTURE_DAY: |
|
ret = sbs_get_battery_manufacture_date(client, psp, val); |
|
break; |
|
|
|
default: |
|
dev_err(&client->dev, |
|
"%s: INVALID property\n", __func__); |
|
return -EINVAL; |
|
} |
|
|
|
if (!chip->gpio_detect && chip->is_present != (ret >= 0)) { |
|
bool old_present = chip->is_present; |
|
union power_supply_propval val; |
|
int err = sbs_get_battery_presence_and_health( |
|
client, POWER_SUPPLY_PROP_PRESENT, &val); |
|
|
|
sbs_update_presence(chip, !err && val.intval); |
|
|
|
if (old_present != chip->is_present) |
|
power_supply_changed(chip->power_supply); |
|
} |
|
|
|
done: |
|
if (!ret) { |
|
/* Convert units to match requirements for power supply class */ |
|
sbs_unit_adjustment(client, psp, val); |
|
dev_dbg(&client->dev, |
|
"%s: property = %d, value = %x\n", __func__, |
|
psp, val->intval); |
|
} else if (!chip->is_present) { |
|
/* battery not present, so return NODATA for properties */ |
|
ret = -ENODATA; |
|
} |
|
return ret; |
|
} |
|
|
|
static void sbs_supply_changed(struct sbs_info *chip) |
|
{ |
|
struct power_supply *battery = chip->power_supply; |
|
int ret; |
|
|
|
ret = gpiod_get_value_cansleep(chip->gpio_detect); |
|
if (ret < 0) |
|
return; |
|
sbs_update_presence(chip, ret); |
|
power_supply_changed(battery); |
|
} |
|
|
|
static irqreturn_t sbs_irq(int irq, void *devid) |
|
{ |
|
sbs_supply_changed(devid); |
|
return IRQ_HANDLED; |
|
} |
|
|
|
static void sbs_alert(struct i2c_client *client, enum i2c_alert_protocol prot, |
|
unsigned int data) |
|
{ |
|
sbs_supply_changed(i2c_get_clientdata(client)); |
|
} |
|
|
|
static void sbs_external_power_changed(struct power_supply *psy) |
|
{ |
|
struct sbs_info *chip = power_supply_get_drvdata(psy); |
|
|
|
/* cancel outstanding work */ |
|
cancel_delayed_work_sync(&chip->work); |
|
|
|
schedule_delayed_work(&chip->work, HZ); |
|
chip->poll_time = chip->poll_retry_count; |
|
} |
|
|
|
static void sbs_delayed_work(struct work_struct *work) |
|
{ |
|
struct sbs_info *chip; |
|
s32 ret; |
|
|
|
chip = container_of(work, struct sbs_info, work.work); |
|
|
|
ret = sbs_read_word_data(chip->client, sbs_data[REG_STATUS].addr); |
|
/* if the read failed, give up on this work */ |
|
if (ret < 0) { |
|
chip->poll_time = 0; |
|
return; |
|
} |
|
|
|
if (ret & BATTERY_FULL_CHARGED) |
|
ret = POWER_SUPPLY_STATUS_FULL; |
|
else if (ret & BATTERY_DISCHARGING) |
|
ret = POWER_SUPPLY_STATUS_DISCHARGING; |
|
else |
|
ret = POWER_SUPPLY_STATUS_CHARGING; |
|
|
|
sbs_status_correct(chip->client, &ret); |
|
|
|
if (chip->last_state != ret) { |
|
chip->poll_time = 0; |
|
power_supply_changed(chip->power_supply); |
|
return; |
|
} |
|
if (chip->poll_time > 0) { |
|
schedule_delayed_work(&chip->work, HZ); |
|
chip->poll_time--; |
|
return; |
|
} |
|
} |
|
|
|
static const struct power_supply_desc sbs_default_desc = { |
|
.type = POWER_SUPPLY_TYPE_BATTERY, |
|
.properties = sbs_properties, |
|
.num_properties = ARRAY_SIZE(sbs_properties), |
|
.get_property = sbs_get_property, |
|
.external_power_changed = sbs_external_power_changed, |
|
}; |
|
|
|
static int sbs_probe(struct i2c_client *client) |
|
{ |
|
struct sbs_info *chip; |
|
struct power_supply_desc *sbs_desc; |
|
struct sbs_platform_data *pdata = client->dev.platform_data; |
|
struct power_supply_config psy_cfg = {}; |
|
int rc; |
|
int irq; |
|
|
|
sbs_desc = devm_kmemdup(&client->dev, &sbs_default_desc, |
|
sizeof(*sbs_desc), GFP_KERNEL); |
|
if (!sbs_desc) |
|
return -ENOMEM; |
|
|
|
sbs_desc->name = devm_kasprintf(&client->dev, GFP_KERNEL, "sbs-%s", |
|
dev_name(&client->dev)); |
|
if (!sbs_desc->name) |
|
return -ENOMEM; |
|
|
|
chip = devm_kzalloc(&client->dev, sizeof(struct sbs_info), GFP_KERNEL); |
|
if (!chip) |
|
return -ENOMEM; |
|
|
|
chip->flags = (u32)(uintptr_t)device_get_match_data(&client->dev); |
|
chip->client = client; |
|
psy_cfg.of_node = client->dev.of_node; |
|
psy_cfg.drv_data = chip; |
|
chip->last_state = POWER_SUPPLY_STATUS_UNKNOWN; |
|
mutex_init(&chip->mode_lock); |
|
|
|
/* use pdata if available, fall back to DT properties, |
|
* or hardcoded defaults if not |
|
*/ |
|
rc = device_property_read_u32(&client->dev, "sbs,i2c-retry-count", |
|
&chip->i2c_retry_count); |
|
if (rc) |
|
chip->i2c_retry_count = 0; |
|
|
|
rc = device_property_read_u32(&client->dev, "sbs,poll-retry-count", |
|
&chip->poll_retry_count); |
|
if (rc) |
|
chip->poll_retry_count = 0; |
|
|
|
if (pdata) { |
|
chip->poll_retry_count = pdata->poll_retry_count; |
|
chip->i2c_retry_count = pdata->i2c_retry_count; |
|
} |
|
chip->i2c_retry_count = chip->i2c_retry_count + 1; |
|
|
|
chip->charger_broadcasts = !device_property_read_bool(&client->dev, |
|
"sbs,disable-charger-broadcasts"); |
|
|
|
chip->gpio_detect = devm_gpiod_get_optional(&client->dev, |
|
"sbs,battery-detect", GPIOD_IN); |
|
if (IS_ERR(chip->gpio_detect)) { |
|
dev_err(&client->dev, "Failed to get gpio: %ld\n", |
|
PTR_ERR(chip->gpio_detect)); |
|
return PTR_ERR(chip->gpio_detect); |
|
} |
|
|
|
i2c_set_clientdata(client, chip); |
|
|
|
if (!chip->gpio_detect) |
|
goto skip_gpio; |
|
|
|
irq = gpiod_to_irq(chip->gpio_detect); |
|
if (irq <= 0) { |
|
dev_warn(&client->dev, "Failed to get gpio as irq: %d\n", irq); |
|
goto skip_gpio; |
|
} |
|
|
|
rc = devm_request_threaded_irq(&client->dev, irq, NULL, sbs_irq, |
|
IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING | IRQF_ONESHOT, |
|
dev_name(&client->dev), chip); |
|
if (rc) { |
|
dev_warn(&client->dev, "Failed to request irq: %d\n", rc); |
|
goto skip_gpio; |
|
} |
|
|
|
skip_gpio: |
|
/* |
|
* Before we register, we might need to make sure we can actually talk |
|
* to the battery. |
|
*/ |
|
if (!(force_load || chip->gpio_detect)) { |
|
union power_supply_propval val; |
|
|
|
rc = sbs_get_battery_presence_and_health( |
|
client, POWER_SUPPLY_PROP_PRESENT, &val); |
|
if (rc < 0 || !val.intval) { |
|
dev_err(&client->dev, "Failed to get present status\n"); |
|
rc = -ENODEV; |
|
goto exit_psupply; |
|
} |
|
} |
|
|
|
INIT_DELAYED_WORK(&chip->work, sbs_delayed_work); |
|
|
|
chip->power_supply = devm_power_supply_register(&client->dev, sbs_desc, |
|
&psy_cfg); |
|
if (IS_ERR(chip->power_supply)) { |
|
dev_err(&client->dev, |
|
"%s: Failed to register power supply\n", __func__); |
|
rc = PTR_ERR(chip->power_supply); |
|
goto exit_psupply; |
|
} |
|
|
|
dev_info(&client->dev, |
|
"%s: battery gas gauge device registered\n", client->name); |
|
|
|
return 0; |
|
|
|
exit_psupply: |
|
return rc; |
|
} |
|
|
|
static int sbs_remove(struct i2c_client *client) |
|
{ |
|
struct sbs_info *chip = i2c_get_clientdata(client); |
|
|
|
cancel_delayed_work_sync(&chip->work); |
|
|
|
return 0; |
|
} |
|
|
|
#if defined CONFIG_PM_SLEEP |
|
|
|
static int sbs_suspend(struct device *dev) |
|
{ |
|
struct i2c_client *client = to_i2c_client(dev); |
|
struct sbs_info *chip = i2c_get_clientdata(client); |
|
int ret; |
|
|
|
if (chip->poll_time > 0) |
|
cancel_delayed_work_sync(&chip->work); |
|
|
|
if (chip->flags & SBS_FLAGS_TI_BQ20ZX5) { |
|
/* Write to manufacturer access with sleep command. */ |
|
ret = sbs_write_word_data(client, |
|
sbs_data[REG_MANUFACTURER_DATA].addr, |
|
MANUFACTURER_ACCESS_SLEEP); |
|
if (chip->is_present && ret < 0) |
|
return ret; |
|
} |
|
|
|
return 0; |
|
} |
|
|
|
static SIMPLE_DEV_PM_OPS(sbs_pm_ops, sbs_suspend, NULL); |
|
#define SBS_PM_OPS (&sbs_pm_ops) |
|
|
|
#else |
|
#define SBS_PM_OPS NULL |
|
#endif |
|
|
|
static const struct i2c_device_id sbs_id[] = { |
|
{ "bq20z65", 0 }, |
|
{ "bq20z75", 0 }, |
|
{ "sbs-battery", 1 }, |
|
{} |
|
}; |
|
MODULE_DEVICE_TABLE(i2c, sbs_id); |
|
|
|
static const struct of_device_id sbs_dt_ids[] = { |
|
{ .compatible = "sbs,sbs-battery" }, |
|
{ |
|
.compatible = "ti,bq20z65", |
|
.data = (void *)SBS_FLAGS_TI_BQ20ZX5, |
|
}, |
|
{ |
|
.compatible = "ti,bq20z75", |
|
.data = (void *)SBS_FLAGS_TI_BQ20ZX5, |
|
}, |
|
{ } |
|
}; |
|
MODULE_DEVICE_TABLE(of, sbs_dt_ids); |
|
|
|
static struct i2c_driver sbs_battery_driver = { |
|
.probe_new = sbs_probe, |
|
.remove = sbs_remove, |
|
.alert = sbs_alert, |
|
.id_table = sbs_id, |
|
.driver = { |
|
.name = "sbs-battery", |
|
.of_match_table = sbs_dt_ids, |
|
.pm = SBS_PM_OPS, |
|
}, |
|
}; |
|
module_i2c_driver(sbs_battery_driver); |
|
|
|
MODULE_DESCRIPTION("SBS battery monitor driver"); |
|
MODULE_LICENSE("GPL"); |
|
|
|
module_param(force_load, bool, 0444); |
|
MODULE_PARM_DESC(force_load, |
|
"Attempt to load the driver even if no battery is connected");
|
|
|