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author | Srikant Patnaik | 2015-01-11 12:28:04 +0530 |
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committer | Srikant Patnaik | 2015-01-11 12:28:04 +0530 |
commit | 871480933a1c28f8a9fed4c4d34d06c439a7a422 (patch) | |
tree | 8718f573808810c2a1e8cb8fb6ac469093ca2784 /ANDROID_3.4.5/drivers/power/wmt_battery/gauge/bq27xx | |
parent | 9d40ac5867b9aefe0722bc1f110b965ff294d30d (diff) | |
download | FOSSEE-netbook-kernel-source-871480933a1c28f8a9fed4c4d34d06c439a7a422.tar.gz FOSSEE-netbook-kernel-source-871480933a1c28f8a9fed4c4d34d06c439a7a422.tar.bz2 FOSSEE-netbook-kernel-source-871480933a1c28f8a9fed4c4d34d06c439a7a422.zip |
Moved, renamed, and deleted files
The original directory structure was scattered and unorganized.
Changes are basically to make it look like kernel structure.
Diffstat (limited to 'ANDROID_3.4.5/drivers/power/wmt_battery/gauge/bq27xx')
-rwxr-xr-x | ANDROID_3.4.5/drivers/power/wmt_battery/gauge/bq27xx/Makefile | 6 | ||||
-rwxr-xr-x | ANDROID_3.4.5/drivers/power/wmt_battery/gauge/bq27xx/bq27x00_battery.c | 1011 |
2 files changed, 0 insertions, 1017 deletions
diff --git a/ANDROID_3.4.5/drivers/power/wmt_battery/gauge/bq27xx/Makefile b/ANDROID_3.4.5/drivers/power/wmt_battery/gauge/bq27xx/Makefile deleted file mode 100755 index 446fbf59..00000000 --- a/ANDROID_3.4.5/drivers/power/wmt_battery/gauge/bq27xx/Makefile +++ /dev/null @@ -1,6 +0,0 @@ - -s_wmt_batt_bq27xx-objs += \ - bq27x00_battery.o - -obj-m += s_wmt_batt_bq27xx.o - diff --git a/ANDROID_3.4.5/drivers/power/wmt_battery/gauge/bq27xx/bq27x00_battery.c b/ANDROID_3.4.5/drivers/power/wmt_battery/gauge/bq27xx/bq27x00_battery.c deleted file mode 100755 index 7a123615..00000000 --- a/ANDROID_3.4.5/drivers/power/wmt_battery/gauge/bq27xx/bq27x00_battery.c +++ /dev/null @@ -1,1011 +0,0 @@ -/* - * 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 - */ - -#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 <mach/wmt_env.h> -#include <linux/power/wmt_battery.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 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 BQ27000_RS 20 /* Resistor sense */ - -#define CONFIG_BATTERY_BQ27X00_I2C - -struct bq27x00_device_info; -struct bq27x00_access_methods { - int (*read)(struct bq27x00_device_info *di, u8 reg, bool single); -}; - -enum bq27x00_chip { BQ27000, BQ27500 }; - -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; -}; - -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, -}; - -static int i2c_bus = 0; -static unsigned int poll_interval = 5; -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) -{ - return di->bus.read(di, reg, single); -} - -/* - * 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) - rsoc = bq27x00_read(di, BQ27500_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 (di->chip == BQ27500) - 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) -{ - 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 (di->chip == BQ27500) - 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 (di->chip == BQ27500) - 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 Celsius - * 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 (di->chip == BQ27500) - temp -= 2731; - else - temp = ((temp * 5) - 5463) / 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; - - 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; -} - -static void bq27x00_update(struct bq27x00_device_info *di) -{ - struct bq27x00_reg_cache cache = {0, }; - bool is_bq27500 = di->chip == BQ27500; - short voltage_now = 0,current_now = 0,capacity_now = 0; - - cache.flags = bq27x00_read(di, BQ27x00_REG_FLAGS, !is_bq27500); - if (cache.flags >= 0) { - if (!is_bq27500 && (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; - } else { - cache.capacity = bq27x00_battery_read_rsoc(di); - 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.temperature = bq27x00_battery_read_temperature(di); - cache.cycle_count = bq27x00_battery_read_cyct(di); - - /* We only have to read charge design full once */ - if (di->charge_design_full <= 0) - di->charge_design_full = bq27x00_battery_read_ilmd(di); - voltage_now = bq27x00_read(di, BQ27x00_REG_VOLT, false)*2; - current_now = bq27x00_read(di, BQ27x00_REG_AI, false); - capacity_now = bq27x00_read(di, BQ27x00_REG_NAC, false); - } - - if (memcmp(&di->cache, &cache, sizeof(cache)) != 0) { - di->cache = cache; - power_supply_changed(&di->bat); - } - - //printk("%s percentage=%d,voltage=%d,current=%d,temperature=%d,%d,flag=%d\n",__FUNCTION__,cache.capacity,voltage_now,current_now,cache.temperature,capacity_now,cache.flags); - - 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 (di->chip == BQ27500) { - /* 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; - - status = charger_get_status(); - if (status < 0) - return status; - - if (status == POWER_SUPPLY_STATUS_CHARGING) { - if (di->chip == BQ27500) { - 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 (di->chip == BQ27500) { - 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 milivolts - * 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 * 2; - - return 0; -} - -static int bq27x00_simple_value(int value, - union power_supply_propval *val) -{ - if (value < 0) - return value; - - val->intval = value; - - return 0; -} - -#define to_bq27x00_device_info(x) container_of((x), \ - struct bq27x00_device_info, bat); - -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 = to_bq27x00_device_info(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); - 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; - default: - return -EINVAL; - } - - return ret; -} - -static void bq27x00_external_power_changed(struct power_supply *psy) -{ - struct bq27x00_device_info *di = to_bq27x00_device_info(psy); - - cancel_delayed_work_sync(&di->work); - schedule_delayed_work(&di->work, 0); -} - -static int bq27x00_powersupply_init(struct bq27x00_device_info *di) -{ - int ret; - - di->bat.type = POWER_SUPPLY_TYPE_BATTERY; - di->bat.properties = bq27x00_battery_props; - di->bat.num_properties = ARRAY_SIZE(bq27x00_battery_props); - di->bat.get_property = bq27x00_battery_get_property; - di->bat.external_power_changed = bq27x00_external_power_changed; - - INIT_DELAYED_WORK(&di->work, bq27x00_battery_poll); - mutex_init(&di->lock); - - ret = power_supply_register(di->dev, &di->bat); - if (ret) { - 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 */ - retval = idr_pre_get(&battery_id, GFP_KERNEL); - if (retval == 0) - return -ENOMEM; - mutex_lock(&battery_mutex); - retval = idr_get_new(&battery_id, client, &num); - mutex_unlock(&battery_mutex); - if (retval < 0) - return retval; - - name = kasprintf(GFP_KERNEL, "%s-%d", id->name, num); - if (!name) { - dev_err(&client->dev, "failed to allocate device name\n"); - retval = -ENOMEM; - goto batt_failed_1; - } - - di = kzalloc(sizeof(*di), GFP_KERNEL); - if (!di) { - dev_err(&client->dev, "failed to allocate device info data\n"); - retval = -ENOMEM; - goto batt_failed_2; - } - - di->id = num; - di->dev = &client->dev; - di->chip = id->driver_data; - di->bat.name = name; - di->bus.read = &bq27x00_read_i2c; - - if (bq27x00_powersupply_init(di)) - goto batt_failed_3; - - i2c_set_clientdata(client, di); - - return 0; - -batt_failed_3: - kfree(di); -batt_failed_2: - kfree(name); -batt_failed_1: - 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); - - kfree(di->bat.name); - - mutex_lock(&battery_mutex); - idr_remove(&battery_id, di->id); - mutex_unlock(&battery_mutex); - - kfree(di); - - return 0; -} - -static int bq27x00_battery_suspend(struct i2c_client *client, pm_message_t mesg) -{ - struct bq27x00_device_info *di = i2c_get_clientdata(client); - cancel_delayed_work_sync(&di->work); - return 0; -} - -static int bq27x00_battery_resume(struct i2c_client *client) -{ - struct bq27x00_device_info *di = i2c_get_clientdata(client); - schedule_delayed_work(&di->work, 1 * HZ); - return 0; -} - -static const struct i2c_device_id bq27x00_id[] = { - { "bq27200", BQ27000 }, /* bq27200 is same as bq27000, but with i2c */ - { "bq27500", BQ27500 }, - {}, -}; -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, - .suspend = bq27x00_battery_suspend, - .resume = bq27x00_battery_resume, - .id_table = bq27x00_id, -}; - -static struct i2c_board_info bq27x00_board_info = { - I2C_BOARD_INFO("bq27500", 0x55), -}; - -static inline int bq27x00_battery_i2c_init(void) -{ - struct i2c_client *client; - struct i2c_adapter *adap; - - int ret = i2c_add_driver(&bq27x00_battery_driver); - if (ret) - printk(KERN_ERR "Unable to register BQ27x00 i2c driver\n"); - adap = i2c_get_adapter(i2c_bus); - if (!adap) - return -ENODEV; - client = i2c_new_device(adap, &bq27x00_board_info); - i2c_put_adapter(adap); - if (!client) { - printk("bq27x00 i2c_new_device failed\n"); - return -ENODEV; - } - - 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 __devinit bq27000_battery_probe(struct platform_device *pdev) -{ - struct bq27x00_device_info *di; - struct bq27000_platform_data *pdata = pdev->dev.platform_data; - int ret; - - 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 = kzalloc(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; - - di->bat.name = pdata->name ?: dev_name(&pdev->dev); - di->bus.read = &bq27000_read_platform; - - ret = bq27x00_powersupply_init(di); - if (ret) - goto err_free; - - return 0; - -err_free: - platform_set_drvdata(pdev, NULL); - kfree(di); - - return ret; -} - -static int __devexit bq27000_battery_remove(struct platform_device *pdev) -{ - struct bq27x00_device_info *di = platform_get_drvdata(pdev); - - bq27x00_powersupply_unregister(di); - - platform_set_drvdata(pdev, NULL); - kfree(di); - - return 0; -} - -static int bq27000_battery_suspend(struct platform_device *pdev, pm_message_t state) -{ - struct bq27x00_device_info *di = platform_get_drvdata(pdev); - cancel_delayed_work_sync(&di->work); - return 0; -} - -static int bq27000_battery_resume(struct platform_device *pdev) -{ - struct bq27x00_device_info *di = platform_get_drvdata(pdev); - schedule_delayed_work(&di->work, 1 * HZ); - return 0; -} - -static struct platform_driver bq27000_battery_driver = { - .probe = bq27000_battery_probe, - .remove = __devexit_p(bq27000_battery_remove), - .suspend = bq27000_battery_suspend; - .resume = bq27000_battery_resume; - .driver = { - .name = "bq27000-battery", - .owner = THIS_MODULE, - }, -}; - -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 parse_battery_param(void) -{ - char env[] = "wmt.battery.param"; - char buf[64]; - char *p; - size_t l = sizeof(buf); - int i; - - if (wmt_getsyspara(env, buf, &l)) - return -EINVAL; - - if (prefixcmp(buf, "bq27xx:")) - return -ENODEV; - - p = strchr(buf, ':'); - - i = sscanf(p + 1, "%d", &i2c_bus); - if (i < 1) { - printk("Parse_param err: Can't get i2c bus num\n"); - return -EINVAL; - } - - return 0; -} - - -static int __init bq27x00_battery_init(void) -{ - int ret; - - if (parse_battery_param()) - return -ENODEV; - - 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); - -MODULE_AUTHOR("Rodolfo Giometti <giometti@linux.it>"); -MODULE_DESCRIPTION("BQ27x00 battery monitor driver"); -MODULE_LICENSE("GPL"); |