+++ /dev/null
-/*
- * BQ27x00 battery driver
- *
- * Copyright (C) 2008 Rodolfo Giometti <giometti@linux.it>
- * Copyright (C) 2008 Eurotech S.p.A. <info@eurotech.it>
- * Copyright (C) 2010-2011 Lars-Peter Clausen <lars@metafoo.de>
- * Copyright (C) 2011 Pali Rohár <pali.rohar@gmail.com>
- *
- * Based on a previous work by Copyright (C) 2008 Texas Instruments, Inc.
- *
- * This package is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- *
- * THIS PACKAGE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
- * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
- * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
- *
- * Datasheets:
- * http://focus.ti.com/docs/prod/folders/print/bq27000.html
- * http://focus.ti.com/docs/prod/folders/print/bq27500.html
- * http://www.ti.com/product/bq27425-g1
- * http://www.ti.com/product/BQ27742-G1
- * http://www.ti.com/product/BQ27510-G3
- */
-
-#include <linux/device.h>
-#include <linux/module.h>
-#include <linux/param.h>
-#include <linux/jiffies.h>
-#include <linux/workqueue.h>
-#include <linux/delay.h>
-#include <linux/platform_device.h>
-#include <linux/power_supply.h>
-#include <linux/idr.h>
-#include <linux/i2c.h>
-#include <linux/slab.h>
-#include <asm/unaligned.h>
-
-#include <linux/power/bq27x00_battery.h>
-
-#define DRIVER_VERSION "1.2.0"
-
-#define BQ27x00_REG_TEMP 0x06
-#define BQ27x00_REG_VOLT 0x08
-#define BQ27x00_REG_AI 0x14
-#define BQ27x00_REG_FLAGS 0x0A
-#define BQ27x00_REG_TTE 0x16
-#define BQ27x00_REG_TTF 0x18
-#define BQ27x00_REG_TTECP 0x26
-#define BQ27x00_REG_NAC 0x0C /* Nominal available capacity */
-#define BQ27x00_REG_LMD 0x12 /* Last measured discharge */
-#define BQ27x00_REG_CYCT 0x2A /* Cycle count total */
-#define BQ27x00_REG_AE 0x22 /* Available energy */
-#define BQ27x00_POWER_AVG 0x24
-
-#define BQ27000_REG_RSOC 0x0B /* Relative State-of-Charge */
-#define BQ27000_REG_ILMD 0x76 /* Initial last measured discharge */
-#define BQ27000_FLAG_EDVF BIT(0) /* Final End-of-Discharge-Voltage flag */
-#define BQ27000_FLAG_EDV1 BIT(1) /* First End-of-Discharge-Voltage flag */
-#define BQ27000_FLAG_CI BIT(4) /* Capacity Inaccurate flag */
-#define BQ27000_FLAG_FC BIT(5)
-#define BQ27000_FLAG_CHGS BIT(7) /* Charge state flag */
-
-#define BQ27500_REG_SOC 0x2C
-#define BQ27500_REG_DCAP 0x3C /* Design capacity */
-#define BQ27500_FLAG_DSC BIT(0)
-#define BQ27500_FLAG_SOCF BIT(1) /* State-of-Charge threshold final */
-#define BQ27500_FLAG_SOC1 BIT(2) /* State-of-Charge threshold 1 */
-#define BQ27500_FLAG_FC BIT(9)
-#define BQ27500_FLAG_OTC BIT(15)
-
-#define BQ27742_POWER_AVG 0x76
-
-#define BQ27510_REG_SOC 0x20
-#define BQ27510_REG_DCAP 0x2E /* Design capacity */
-#define BQ27510_REG_CYCT 0x1E /* Cycle count total */
-
-/* bq27425 register addresses are same as bq27x00 addresses minus 4 */
-#define BQ27425_REG_OFFSET 0x04
-#define BQ27425_REG_SOC (0x1C + BQ27425_REG_OFFSET)
-#define BQ27425_REG_DCAP (0x3C + BQ27425_REG_OFFSET)
-
-#define BQ27000_RS 20 /* Resistor sense */
-#define BQ27x00_POWER_CONSTANT (256 * 29200 / 1000)
-
-struct bq27x00_device_info;
-struct bq27x00_access_methods {
- int (*read)(struct bq27x00_device_info *di, u8 reg, bool single);
-};
-
-enum bq27x00_chip { BQ27000, BQ27500, BQ27425, BQ27742, BQ27510};
-
-struct bq27x00_reg_cache {
- int temperature;
- int time_to_empty;
- int time_to_empty_avg;
- int time_to_full;
- int charge_full;
- int cycle_count;
- int capacity;
- int energy;
- int flags;
- int power_avg;
- int health;
-};
-
-struct bq27x00_device_info {
- struct device *dev;
- int id;
- enum bq27x00_chip chip;
-
- struct bq27x00_reg_cache cache;
- int charge_design_full;
-
- unsigned long last_update;
- struct delayed_work work;
-
- struct power_supply *bat;
-
- struct bq27x00_access_methods bus;
-
- struct mutex lock;
-};
-
-static enum power_supply_property bq27x00_battery_props[] = {
- POWER_SUPPLY_PROP_STATUS,
- POWER_SUPPLY_PROP_PRESENT,
- POWER_SUPPLY_PROP_VOLTAGE_NOW,
- POWER_SUPPLY_PROP_CURRENT_NOW,
- POWER_SUPPLY_PROP_CAPACITY,
- POWER_SUPPLY_PROP_CAPACITY_LEVEL,
- POWER_SUPPLY_PROP_TEMP,
- POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW,
- POWER_SUPPLY_PROP_TIME_TO_EMPTY_AVG,
- POWER_SUPPLY_PROP_TIME_TO_FULL_NOW,
- POWER_SUPPLY_PROP_TECHNOLOGY,
- POWER_SUPPLY_PROP_CHARGE_FULL,
- POWER_SUPPLY_PROP_CHARGE_NOW,
- POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN,
- POWER_SUPPLY_PROP_CYCLE_COUNT,
- POWER_SUPPLY_PROP_ENERGY_NOW,
- POWER_SUPPLY_PROP_POWER_AVG,
- POWER_SUPPLY_PROP_HEALTH,
-};
-
-static enum power_supply_property bq27425_battery_props[] = {
- POWER_SUPPLY_PROP_STATUS,
- POWER_SUPPLY_PROP_PRESENT,
- POWER_SUPPLY_PROP_VOLTAGE_NOW,
- POWER_SUPPLY_PROP_CURRENT_NOW,
- POWER_SUPPLY_PROP_CAPACITY,
- POWER_SUPPLY_PROP_CAPACITY_LEVEL,
- POWER_SUPPLY_PROP_TEMP,
- POWER_SUPPLY_PROP_TECHNOLOGY,
- POWER_SUPPLY_PROP_CHARGE_FULL,
- POWER_SUPPLY_PROP_CHARGE_NOW,
- POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN,
-};
-
-static enum power_supply_property bq27742_battery_props[] = {
- POWER_SUPPLY_PROP_STATUS,
- POWER_SUPPLY_PROP_PRESENT,
- POWER_SUPPLY_PROP_VOLTAGE_NOW,
- POWER_SUPPLY_PROP_CURRENT_NOW,
- POWER_SUPPLY_PROP_CAPACITY,
- POWER_SUPPLY_PROP_CAPACITY_LEVEL,
- POWER_SUPPLY_PROP_TEMP,
- POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW,
- POWER_SUPPLY_PROP_TECHNOLOGY,
- POWER_SUPPLY_PROP_CHARGE_FULL,
- POWER_SUPPLY_PROP_CHARGE_NOW,
- POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN,
- POWER_SUPPLY_PROP_CYCLE_COUNT,
- POWER_SUPPLY_PROP_POWER_AVG,
- POWER_SUPPLY_PROP_HEALTH,
-};
-
-static enum power_supply_property bq27510_battery_props[] = {
- POWER_SUPPLY_PROP_STATUS,
- POWER_SUPPLY_PROP_PRESENT,
- POWER_SUPPLY_PROP_VOLTAGE_NOW,
- POWER_SUPPLY_PROP_CURRENT_NOW,
- POWER_SUPPLY_PROP_CAPACITY,
- POWER_SUPPLY_PROP_CAPACITY_LEVEL,
- POWER_SUPPLY_PROP_TEMP,
- POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW,
- POWER_SUPPLY_PROP_TECHNOLOGY,
- POWER_SUPPLY_PROP_CHARGE_FULL,
- POWER_SUPPLY_PROP_CHARGE_NOW,
- POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN,
- POWER_SUPPLY_PROP_CYCLE_COUNT,
- POWER_SUPPLY_PROP_POWER_AVG,
- POWER_SUPPLY_PROP_HEALTH,
-};
-
-static unsigned int poll_interval = 360;
-module_param(poll_interval, uint, 0644);
-MODULE_PARM_DESC(poll_interval, "battery poll interval in seconds - " \
- "0 disables polling");
-
-/*
- * Common code for BQ27x00 devices
- */
-
-static inline int bq27x00_read(struct bq27x00_device_info *di, u8 reg,
- bool single)
-{
- if (di->chip == BQ27425)
- return di->bus.read(di, reg - BQ27425_REG_OFFSET, single);
- return di->bus.read(di, reg, single);
-}
-
-/*
- * Higher versions of the chip like BQ27425 and BQ27500
- * differ from BQ27000 and BQ27200 in calculation of certain
- * parameters. Hence we need to check for the chip type.
- */
-static bool bq27xxx_is_chip_version_higher(struct bq27x00_device_info *di)
-{
- if (di->chip == BQ27425 || di->chip == BQ27500 || di->chip == BQ27742
- || di->chip == BQ27510)
- return true;
- return false;
-}
-
-/*
- * Return the battery Relative State-of-Charge
- * Or < 0 if something fails.
- */
-static int bq27x00_battery_read_rsoc(struct bq27x00_device_info *di)
-{
- int rsoc;
-
- if (di->chip == BQ27500 || di->chip == BQ27742)
- rsoc = bq27x00_read(di, BQ27500_REG_SOC, false);
- else if (di->chip == BQ27510)
- rsoc = bq27x00_read(di, BQ27510_REG_SOC, false);
- else if (di->chip == BQ27425)
- rsoc = bq27x00_read(di, BQ27425_REG_SOC, false);
- else
- rsoc = bq27x00_read(di, BQ27000_REG_RSOC, true);
-
- if (rsoc < 0)
- dev_dbg(di->dev, "error reading relative State-of-Charge\n");
-
- return rsoc;
-}
-
-/*
- * Return a battery charge value in µAh
- * Or < 0 if something fails.
- */
-static int bq27x00_battery_read_charge(struct bq27x00_device_info *di, u8 reg)
-{
- int charge;
-
- charge = bq27x00_read(di, reg, false);
- if (charge < 0) {
- dev_dbg(di->dev, "error reading charge register %02x: %d\n",
- reg, charge);
- return charge;
- }
-
- if (bq27xxx_is_chip_version_higher(di))
- charge *= 1000;
- else
- charge = charge * 3570 / BQ27000_RS;
-
- return charge;
-}
-
-/*
- * Return the battery Nominal available capaciy in µAh
- * Or < 0 if something fails.
- */
-static inline int bq27x00_battery_read_nac(struct bq27x00_device_info *di)
-{
- int flags;
- bool is_bq27500 = di->chip == BQ27500;
- bool is_bq27742 = di->chip == BQ27742;
- bool is_higher = bq27xxx_is_chip_version_higher(di);
- bool flags_1b = !(is_bq27500 || is_bq27742);
-
- flags = bq27x00_read(di, BQ27x00_REG_FLAGS, flags_1b);
- if (flags >= 0 && !is_higher && (flags & BQ27000_FLAG_CI))
- return -ENODATA;
-
- return bq27x00_battery_read_charge(di, BQ27x00_REG_NAC);
-}
-
-/*
- * Return the battery Last measured discharge in µAh
- * Or < 0 if something fails.
- */
-static inline int bq27x00_battery_read_lmd(struct bq27x00_device_info *di)
-{
- return bq27x00_battery_read_charge(di, BQ27x00_REG_LMD);
-}
-
-/*
- * Return the battery Initial last measured discharge in µAh
- * Or < 0 if something fails.
- */
-static int bq27x00_battery_read_ilmd(struct bq27x00_device_info *di)
-{
- int ilmd;
-
- if (bq27xxx_is_chip_version_higher(di)) {
- if (di->chip == BQ27425)
- ilmd = bq27x00_read(di, BQ27425_REG_DCAP, false);
- else if (di->chip == BQ27510)
- ilmd = bq27x00_read(di, BQ27510_REG_DCAP, false);
- else
- ilmd = bq27x00_read(di, BQ27500_REG_DCAP, false);
- } else
- ilmd = bq27x00_read(di, BQ27000_REG_ILMD, true);
-
- if (ilmd < 0) {
- dev_dbg(di->dev, "error reading initial last measured discharge\n");
- return ilmd;
- }
-
- if (bq27xxx_is_chip_version_higher(di))
- ilmd *= 1000;
- else
- ilmd = ilmd * 256 * 3570 / BQ27000_RS;
-
- return ilmd;
-}
-
-/*
- * Return the battery Available energy in µWh
- * Or < 0 if something fails.
- */
-static int bq27x00_battery_read_energy(struct bq27x00_device_info *di)
-{
- int ae;
-
- ae = bq27x00_read(di, BQ27x00_REG_AE, false);
- if (ae < 0) {
- dev_dbg(di->dev, "error reading available energy\n");
- return ae;
- }
-
- if (di->chip == BQ27500)
- ae *= 1000;
- else
- ae = ae * 29200 / BQ27000_RS;
-
- return ae;
-}
-
-/*
- * Return the battery temperature in tenths of degree Kelvin
- * Or < 0 if something fails.
- */
-static int bq27x00_battery_read_temperature(struct bq27x00_device_info *di)
-{
- int temp;
-
- temp = bq27x00_read(di, BQ27x00_REG_TEMP, false);
- if (temp < 0) {
- dev_err(di->dev, "error reading temperature\n");
- return temp;
- }
-
- if (!bq27xxx_is_chip_version_higher(di))
- temp = 5 * temp / 2;
-
- return temp;
-}
-
-/*
- * Return the battery Cycle count total
- * Or < 0 if something fails.
- */
-static int bq27x00_battery_read_cyct(struct bq27x00_device_info *di)
-{
- int cyct;
-
- if (di->chip == BQ27510)
- cyct = bq27x00_read(di, BQ27510_REG_CYCT, false);
- else
- cyct = bq27x00_read(di, BQ27x00_REG_CYCT, false);
- if (cyct < 0)
- dev_err(di->dev, "error reading cycle count total\n");
-
- return cyct;
-}
-
-/*
- * Read a time register.
- * Return < 0 if something fails.
- */
-static int bq27x00_battery_read_time(struct bq27x00_device_info *di, u8 reg)
-{
- int tval;
-
- tval = bq27x00_read(di, reg, false);
- if (tval < 0) {
- dev_dbg(di->dev, "error reading time register %02x: %d\n",
- reg, tval);
- return tval;
- }
-
- if (tval == 65535)
- return -ENODATA;
-
- return tval * 60;
-}
-
-/*
- * Read a power avg register.
- * Return < 0 if something fails.
- */
-static int bq27x00_battery_read_pwr_avg(struct bq27x00_device_info *di, u8 reg)
-{
- int tval;
-
- tval = bq27x00_read(di, reg, false);
- if (tval < 0) {
- dev_err(di->dev, "error reading power avg rgister %02x: %d\n",
- reg, tval);
- return tval;
- }
-
- if (di->chip == BQ27500)
- return tval;
- else
- return (tval * BQ27x00_POWER_CONSTANT) / BQ27000_RS;
-}
-
-/*
- * Read flag register.
- * Return < 0 if something fails.
- */
-static int bq27x00_battery_read_health(struct bq27x00_device_info *di)
-{
- int tval;
-
- tval = bq27x00_read(di, BQ27x00_REG_FLAGS, false);
- if (tval < 0) {
- dev_err(di->dev, "error reading flag register:%d\n", tval);
- return tval;
- }
-
- if ((di->chip == BQ27500)) {
- if (tval & BQ27500_FLAG_SOCF)
- tval = POWER_SUPPLY_HEALTH_DEAD;
- else if (tval & BQ27500_FLAG_OTC)
- tval = POWER_SUPPLY_HEALTH_OVERHEAT;
- else
- tval = POWER_SUPPLY_HEALTH_GOOD;
- return tval;
- } else if (di->chip == BQ27510) {
- if (tval & BQ27500_FLAG_OTC)
- return POWER_SUPPLY_HEALTH_OVERHEAT;
- return POWER_SUPPLY_HEALTH_GOOD;
- } else {
- if (tval & BQ27000_FLAG_EDV1)
- tval = POWER_SUPPLY_HEALTH_DEAD;
- else
- tval = POWER_SUPPLY_HEALTH_GOOD;
- return tval;
- }
-
- return -1;
-}
-
-static void bq27x00_update(struct bq27x00_device_info *di)
-{
- struct bq27x00_reg_cache cache = {0, };
- bool is_bq27500 = di->chip == BQ27500;
- bool is_bq27510 = di->chip == BQ27510;
- bool is_bq27425 = di->chip == BQ27425;
- bool is_bq27742 = di->chip == BQ27742;
- bool flags_1b = !(is_bq27500 || is_bq27742);
-
- cache.flags = bq27x00_read(di, BQ27x00_REG_FLAGS, flags_1b);
- if ((cache.flags & 0xff) == 0xff)
- /* read error */
- cache.flags = -1;
- if (cache.flags >= 0) {
- if (!is_bq27500 && !is_bq27425 && !is_bq27742 && !is_bq27510
- && (cache.flags & BQ27000_FLAG_CI)) {
- dev_info(di->dev, "battery is not calibrated! ignoring capacity values\n");
- cache.capacity = -ENODATA;
- cache.energy = -ENODATA;
- cache.time_to_empty = -ENODATA;
- cache.time_to_empty_avg = -ENODATA;
- cache.time_to_full = -ENODATA;
- cache.charge_full = -ENODATA;
- cache.health = -ENODATA;
- } else {
- cache.capacity = bq27x00_battery_read_rsoc(di);
- if (is_bq27742 || is_bq27510)
- cache.time_to_empty =
- bq27x00_battery_read_time(di,
- BQ27x00_REG_TTE);
- else if (!is_bq27425) {
- cache.energy = bq27x00_battery_read_energy(di);
- cache.time_to_empty =
- bq27x00_battery_read_time(di,
- BQ27x00_REG_TTE);
- cache.time_to_empty_avg =
- bq27x00_battery_read_time(di,
- BQ27x00_REG_TTECP);
- cache.time_to_full =
- bq27x00_battery_read_time(di,
- BQ27x00_REG_TTF);
- }
- cache.charge_full = bq27x00_battery_read_lmd(di);
- cache.health = bq27x00_battery_read_health(di);
- }
- cache.temperature = bq27x00_battery_read_temperature(di);
- if (!is_bq27425)
- cache.cycle_count = bq27x00_battery_read_cyct(di);
- if (is_bq27742)
- cache.power_avg =
- bq27x00_battery_read_pwr_avg(di,
- BQ27742_POWER_AVG);
- else
- cache.power_avg =
- bq27x00_battery_read_pwr_avg(di,
- BQ27x00_POWER_AVG);
-
- /* We only have to read charge design full once */
- if (di->charge_design_full <= 0)
- di->charge_design_full = bq27x00_battery_read_ilmd(di);
- }
-
- if (di->cache.capacity != cache.capacity)
- power_supply_changed(di->bat);
-
- if (memcmp(&di->cache, &cache, sizeof(cache)) != 0)
- di->cache = cache;
-
- di->last_update = jiffies;
-}
-
-static void bq27x00_battery_poll(struct work_struct *work)
-{
- struct bq27x00_device_info *di =
- container_of(work, struct bq27x00_device_info, work.work);
-
- bq27x00_update(di);
-
- if (poll_interval > 0) {
- /* The timer does not have to be accurate. */
- set_timer_slack(&di->work.timer, poll_interval * HZ / 4);
- schedule_delayed_work(&di->work, poll_interval * HZ);
- }
-}
-
-/*
- * Return the battery average current in µA
- * Note that current can be negative signed as well
- * Or 0 if something fails.
- */
-static int bq27x00_battery_current(struct bq27x00_device_info *di,
- union power_supply_propval *val)
-{
- int curr;
- int flags;
-
- curr = bq27x00_read(di, BQ27x00_REG_AI, false);
- if (curr < 0) {
- dev_err(di->dev, "error reading current\n");
- return curr;
- }
-
- if (bq27xxx_is_chip_version_higher(di)) {
- /* bq27500 returns signed value */
- val->intval = (int)((s16)curr) * 1000;
- } else {
- flags = bq27x00_read(di, BQ27x00_REG_FLAGS, false);
- if (flags & BQ27000_FLAG_CHGS) {
- dev_dbg(di->dev, "negative current!\n");
- curr = -curr;
- }
-
- val->intval = curr * 3570 / BQ27000_RS;
- }
-
- return 0;
-}
-
-static int bq27x00_battery_status(struct bq27x00_device_info *di,
- union power_supply_propval *val)
-{
- int status;
-
- if (bq27xxx_is_chip_version_higher(di)) {
- if (di->cache.flags & BQ27500_FLAG_FC)
- status = POWER_SUPPLY_STATUS_FULL;
- else if (di->cache.flags & BQ27500_FLAG_DSC)
- status = POWER_SUPPLY_STATUS_DISCHARGING;
- else
- status = POWER_SUPPLY_STATUS_CHARGING;
- } else {
- if (di->cache.flags & BQ27000_FLAG_FC)
- status = POWER_SUPPLY_STATUS_FULL;
- else if (di->cache.flags & BQ27000_FLAG_CHGS)
- status = POWER_SUPPLY_STATUS_CHARGING;
- else if (power_supply_am_i_supplied(di->bat))
- status = POWER_SUPPLY_STATUS_NOT_CHARGING;
- else
- status = POWER_SUPPLY_STATUS_DISCHARGING;
- }
-
- val->intval = status;
-
- return 0;
-}
-
-static int bq27x00_battery_capacity_level(struct bq27x00_device_info *di,
- union power_supply_propval *val)
-{
- int level;
-
- if (bq27xxx_is_chip_version_higher(di)) {
- if (di->cache.flags & BQ27500_FLAG_FC)
- level = POWER_SUPPLY_CAPACITY_LEVEL_FULL;
- else if (di->cache.flags & BQ27500_FLAG_SOC1)
- level = POWER_SUPPLY_CAPACITY_LEVEL_LOW;
- else if (di->cache.flags & BQ27500_FLAG_SOCF)
- level = POWER_SUPPLY_CAPACITY_LEVEL_CRITICAL;
- else
- level = POWER_SUPPLY_CAPACITY_LEVEL_NORMAL;
- } else {
- if (di->cache.flags & BQ27000_FLAG_FC)
- level = POWER_SUPPLY_CAPACITY_LEVEL_FULL;
- else if (di->cache.flags & BQ27000_FLAG_EDV1)
- level = POWER_SUPPLY_CAPACITY_LEVEL_LOW;
- else if (di->cache.flags & BQ27000_FLAG_EDVF)
- level = POWER_SUPPLY_CAPACITY_LEVEL_CRITICAL;
- else
- level = POWER_SUPPLY_CAPACITY_LEVEL_NORMAL;
- }
-
- val->intval = level;
-
- return 0;
-}
-
-/*
- * Return the battery Voltage in millivolts
- * Or < 0 if something fails.
- */
-static int bq27x00_battery_voltage(struct bq27x00_device_info *di,
- union power_supply_propval *val)
-{
- int volt;
-
- volt = bq27x00_read(di, BQ27x00_REG_VOLT, false);
- if (volt < 0) {
- dev_err(di->dev, "error reading voltage\n");
- return volt;
- }
-
- val->intval = volt * 1000;
-
- return 0;
-}
-
-static int bq27x00_simple_value(int value,
- union power_supply_propval *val)
-{
- if (value < 0)
- return value;
-
- val->intval = value;
-
- return 0;
-}
-
-static int bq27x00_battery_get_property(struct power_supply *psy,
- enum power_supply_property psp,
- union power_supply_propval *val)
-{
- int ret = 0;
- struct bq27x00_device_info *di = power_supply_get_drvdata(psy);
-
- mutex_lock(&di->lock);
- if (time_is_before_jiffies(di->last_update + 5 * HZ)) {
- cancel_delayed_work_sync(&di->work);
- bq27x00_battery_poll(&di->work.work);
- }
- mutex_unlock(&di->lock);
-
- if (psp != POWER_SUPPLY_PROP_PRESENT && di->cache.flags < 0)
- return -ENODEV;
-
- switch (psp) {
- case POWER_SUPPLY_PROP_STATUS:
- ret = bq27x00_battery_status(di, val);
- break;
- case POWER_SUPPLY_PROP_VOLTAGE_NOW:
- ret = bq27x00_battery_voltage(di, val);
- break;
- case POWER_SUPPLY_PROP_PRESENT:
- val->intval = di->cache.flags < 0 ? 0 : 1;
- break;
- case POWER_SUPPLY_PROP_CURRENT_NOW:
- ret = bq27x00_battery_current(di, val);
- break;
- case POWER_SUPPLY_PROP_CAPACITY:
- ret = bq27x00_simple_value(di->cache.capacity, val);
- break;
- case POWER_SUPPLY_PROP_CAPACITY_LEVEL:
- ret = bq27x00_battery_capacity_level(di, val);
- break;
- case POWER_SUPPLY_PROP_TEMP:
- ret = bq27x00_simple_value(di->cache.temperature, val);
- if (ret == 0)
- val->intval -= 2731;
- break;
- case POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW:
- ret = bq27x00_simple_value(di->cache.time_to_empty, val);
- break;
- case POWER_SUPPLY_PROP_TIME_TO_EMPTY_AVG:
- ret = bq27x00_simple_value(di->cache.time_to_empty_avg, val);
- break;
- case POWER_SUPPLY_PROP_TIME_TO_FULL_NOW:
- ret = bq27x00_simple_value(di->cache.time_to_full, val);
- break;
- case POWER_SUPPLY_PROP_TECHNOLOGY:
- val->intval = POWER_SUPPLY_TECHNOLOGY_LION;
- break;
- case POWER_SUPPLY_PROP_CHARGE_NOW:
- ret = bq27x00_simple_value(bq27x00_battery_read_nac(di), val);
- break;
- case POWER_SUPPLY_PROP_CHARGE_FULL:
- ret = bq27x00_simple_value(di->cache.charge_full, val);
- break;
- case POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN:
- ret = bq27x00_simple_value(di->charge_design_full, val);
- break;
- case POWER_SUPPLY_PROP_CYCLE_COUNT:
- ret = bq27x00_simple_value(di->cache.cycle_count, val);
- break;
- case POWER_SUPPLY_PROP_ENERGY_NOW:
- ret = bq27x00_simple_value(di->cache.energy, val);
- break;
- case POWER_SUPPLY_PROP_POWER_AVG:
- ret = bq27x00_simple_value(di->cache.power_avg, val);
- break;
- case POWER_SUPPLY_PROP_HEALTH:
- ret = bq27x00_simple_value(di->cache.health, val);
- break;
- default:
- return -EINVAL;
- }
-
- return ret;
-}
-
-static void bq27x00_external_power_changed(struct power_supply *psy)
-{
- struct bq27x00_device_info *di = power_supply_get_drvdata(psy);
-
- cancel_delayed_work_sync(&di->work);
- schedule_delayed_work(&di->work, 0);
-}
-
-static int bq27x00_powersupply_init(struct bq27x00_device_info *di,
- const char *name)
-{
- int ret;
- struct power_supply_desc *psy_desc;
- struct power_supply_config psy_cfg = { .drv_data = di, };
-
- psy_desc = devm_kzalloc(di->dev, sizeof(*psy_desc), GFP_KERNEL);
- if (!psy_desc)
- return -ENOMEM;
-
- psy_desc->name = name;
- psy_desc->type = POWER_SUPPLY_TYPE_BATTERY;
- if (di->chip == BQ27425) {
- psy_desc->properties = bq27425_battery_props;
- psy_desc->num_properties = ARRAY_SIZE(bq27425_battery_props);
- } else if (di->chip == BQ27742) {
- psy_desc->properties = bq27742_battery_props;
- psy_desc->num_properties = ARRAY_SIZE(bq27742_battery_props);
- } else if (di->chip == BQ27510) {
- psy_desc->properties = bq27510_battery_props;
- psy_desc->num_properties = ARRAY_SIZE(bq27510_battery_props);
- } else {
- psy_desc->properties = bq27x00_battery_props;
- psy_desc->num_properties = ARRAY_SIZE(bq27x00_battery_props);
- }
- psy_desc->get_property = bq27x00_battery_get_property;
- psy_desc->external_power_changed = bq27x00_external_power_changed;
-
- INIT_DELAYED_WORK(&di->work, bq27x00_battery_poll);
- mutex_init(&di->lock);
-
- di->bat = power_supply_register_no_ws(di->dev, psy_desc, &psy_cfg);
- if (IS_ERR(di->bat)) {
- ret = PTR_ERR(di->bat);
- dev_err(di->dev, "failed to register battery: %d\n", ret);
- return ret;
- }
-
- dev_info(di->dev, "support ver. %s enabled\n", DRIVER_VERSION);
-
- bq27x00_update(di);
-
- return 0;
-}
-
-static void bq27x00_powersupply_unregister(struct bq27x00_device_info *di)
-{
- /*
- * power_supply_unregister call bq27x00_battery_get_property which
- * call bq27x00_battery_poll.
- * Make sure that bq27x00_battery_poll will not call
- * schedule_delayed_work again after unregister (which cause OOPS).
- */
- poll_interval = 0;
-
- cancel_delayed_work_sync(&di->work);
-
- power_supply_unregister(di->bat);
-
- mutex_destroy(&di->lock);
-}
-
-
-/* i2c specific code */
-#ifdef CONFIG_BATTERY_BQ27X00_I2C
-
-/* If the system has several batteries we need a different name for each
- * of them...
- */
-static DEFINE_IDR(battery_id);
-static DEFINE_MUTEX(battery_mutex);
-
-static int bq27x00_read_i2c(struct bq27x00_device_info *di, u8 reg, bool single)
-{
- struct i2c_client *client = to_i2c_client(di->dev);
- struct i2c_msg msg[2];
- unsigned char data[2];
- int ret;
-
- if (!client->adapter)
- return -ENODEV;
-
- msg[0].addr = client->addr;
- msg[0].flags = 0;
- msg[0].buf = ®
- msg[0].len = sizeof(reg);
- msg[1].addr = client->addr;
- msg[1].flags = I2C_M_RD;
- msg[1].buf = data;
- if (single)
- msg[1].len = 1;
- else
- msg[1].len = 2;
-
- ret = i2c_transfer(client->adapter, msg, ARRAY_SIZE(msg));
- if (ret < 0)
- return ret;
-
- if (!single)
- ret = get_unaligned_le16(data);
- else
- ret = data[0];
-
- return ret;
-}
-
-static int bq27x00_battery_probe(struct i2c_client *client,
- const struct i2c_device_id *id)
-{
- char *name;
- struct bq27x00_device_info *di;
- int num;
- int retval = 0;
-
- /* Get new ID for the new battery device */
- mutex_lock(&battery_mutex);
- num = idr_alloc(&battery_id, client, 0, 0, GFP_KERNEL);
- mutex_unlock(&battery_mutex);
- if (num < 0)
- return num;
-
- name = devm_kasprintf(&client->dev, GFP_KERNEL, "%s-%d", id->name, num);
- if (!name) {
- dev_err(&client->dev, "failed to allocate device name\n");
- retval = -ENOMEM;
- goto batt_failed;
- }
-
- di = devm_kzalloc(&client->dev, sizeof(*di), GFP_KERNEL);
- if (!di) {
- dev_err(&client->dev, "failed to allocate device info data\n");
- retval = -ENOMEM;
- goto batt_failed;
- }
-
- di->id = num;
- di->dev = &client->dev;
- di->chip = id->driver_data;
- di->bus.read = &bq27x00_read_i2c;
-
- retval = bq27x00_powersupply_init(di, name);
- if (retval)
- goto batt_failed;
-
- i2c_set_clientdata(client, di);
-
- return 0;
-
-batt_failed:
- mutex_lock(&battery_mutex);
- idr_remove(&battery_id, num);
- mutex_unlock(&battery_mutex);
-
- return retval;
-}
-
-static int bq27x00_battery_remove(struct i2c_client *client)
-{
- struct bq27x00_device_info *di = i2c_get_clientdata(client);
-
- bq27x00_powersupply_unregister(di);
-
- mutex_lock(&battery_mutex);
- idr_remove(&battery_id, di->id);
- mutex_unlock(&battery_mutex);
-
- return 0;
-}
-
-static const struct i2c_device_id bq27x00_id[] = {
- { "bq27200", BQ27000 }, /* bq27200 is same as bq27000, but with i2c */
- { "bq27500", BQ27500 },
- { "bq27425", BQ27425 },
- { "bq27742", BQ27742 },
- { "bq27510", BQ27510 },
- {},
-};
-MODULE_DEVICE_TABLE(i2c, bq27x00_id);
-
-static struct i2c_driver bq27x00_battery_driver = {
- .driver = {
- .name = "bq27x00-battery",
- },
- .probe = bq27x00_battery_probe,
- .remove = bq27x00_battery_remove,
- .id_table = bq27x00_id,
-};
-
-static inline int bq27x00_battery_i2c_init(void)
-{
- int ret = i2c_add_driver(&bq27x00_battery_driver);
- if (ret)
- printk(KERN_ERR "Unable to register BQ27x00 i2c driver\n");
-
- return ret;
-}
-
-static inline void bq27x00_battery_i2c_exit(void)
-{
- i2c_del_driver(&bq27x00_battery_driver);
-}
-
-#else
-
-static inline int bq27x00_battery_i2c_init(void) { return 0; }
-static inline void bq27x00_battery_i2c_exit(void) {};
-
-#endif
-
-/* platform specific code */
-#ifdef CONFIG_BATTERY_BQ27X00_PLATFORM
-
-static int bq27000_read_platform(struct bq27x00_device_info *di, u8 reg,
- bool single)
-{
- struct device *dev = di->dev;
- struct bq27000_platform_data *pdata = dev->platform_data;
- unsigned int timeout = 3;
- int upper, lower;
- int temp;
-
- if (!single) {
- /* Make sure the value has not changed in between reading the
- * lower and the upper part */
- upper = pdata->read(dev, reg + 1);
- do {
- temp = upper;
- if (upper < 0)
- return upper;
-
- lower = pdata->read(dev, reg);
- if (lower < 0)
- return lower;
-
- upper = pdata->read(dev, reg + 1);
- } while (temp != upper && --timeout);
-
- if (timeout == 0)
- return -EIO;
-
- return (upper << 8) | lower;
- }
-
- return pdata->read(dev, reg);
-}
-
-static int bq27000_battery_probe(struct platform_device *pdev)
-{
- struct bq27x00_device_info *di;
- struct bq27000_platform_data *pdata = pdev->dev.platform_data;
- const char *name;
-
- if (!pdata) {
- dev_err(&pdev->dev, "no platform_data supplied\n");
- return -EINVAL;
- }
-
- if (!pdata->read) {
- dev_err(&pdev->dev, "no hdq read callback supplied\n");
- return -EINVAL;
- }
-
- di = devm_kzalloc(&pdev->dev, sizeof(*di), GFP_KERNEL);
- if (!di) {
- dev_err(&pdev->dev, "failed to allocate device info data\n");
- return -ENOMEM;
- }
-
- platform_set_drvdata(pdev, di);
-
- di->dev = &pdev->dev;
- di->chip = BQ27000;
-
- name = pdata->name ?: dev_name(&pdev->dev);
- di->bus.read = &bq27000_read_platform;
-
- return bq27x00_powersupply_init(di, name);
-}
-
-static int bq27000_battery_remove(struct platform_device *pdev)
-{
- struct bq27x00_device_info *di = platform_get_drvdata(pdev);
-
- bq27x00_powersupply_unregister(di);
-
- return 0;
-}
-
-static struct platform_driver bq27000_battery_driver = {
- .probe = bq27000_battery_probe,
- .remove = bq27000_battery_remove,
- .driver = {
- .name = "bq27000-battery",
- },
-};
-
-static inline int bq27x00_battery_platform_init(void)
-{
- int ret = platform_driver_register(&bq27000_battery_driver);
- if (ret)
- printk(KERN_ERR "Unable to register BQ27000 platform driver\n");
-
- return ret;
-}
-
-static inline void bq27x00_battery_platform_exit(void)
-{
- platform_driver_unregister(&bq27000_battery_driver);
-}
-
-#else
-
-static inline int bq27x00_battery_platform_init(void) { return 0; }
-static inline void bq27x00_battery_platform_exit(void) {};
-
-#endif
-
-/*
- * Module stuff
- */
-
-static int __init bq27x00_battery_init(void)
-{
- int ret;
-
- ret = bq27x00_battery_i2c_init();
- if (ret)
- return ret;
-
- ret = bq27x00_battery_platform_init();
- if (ret)
- bq27x00_battery_i2c_exit();
-
- return ret;
-}
-module_init(bq27x00_battery_init);
-
-static void __exit bq27x00_battery_exit(void)
-{
- bq27x00_battery_platform_exit();
- bq27x00_battery_i2c_exit();
-}
-module_exit(bq27x00_battery_exit);
-
-#ifdef CONFIG_BATTERY_BQ27X00_PLATFORM
-MODULE_ALIAS("platform:bq27000-battery");
-#endif
-
-#ifdef CONFIG_BATTERY_BQ27X00_I2C
-MODULE_ALIAS("i2c:bq27000-battery");
-#endif
-
-MODULE_AUTHOR("Rodolfo Giometti <giometti@linux.it>");
-MODULE_DESCRIPTION("BQ27x00 battery monitor driver");
-MODULE_LICENSE("GPL");
Code Review / kvmfornfv.git / blobdiff