+++ /dev/null
---- kernel-power-2.6.28/drivers/power/bq27x00_battery.c 2011-05-01 01:48:44.000000000 +0200
-+++ kernel-power-2.6.28/drivers/power/bq27x00_battery.c 2011-05-01 01:51:12.000000000 +0200
-@@ -3,6 +3,8 @@
- *
- * 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.
- *
-@@ -15,6 +17,13 @@
- * 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>
-@@ -24,144 +33,407 @@
- #include <linux/power_supply.h>
- #include <linux/idr.h>
- #include <linux/i2c.h>
-+#include <linux/slab.h>
- #include <asm/unaligned.h>
-
--#define DRIVER_VERSION "1.0.0"
-+#define CONFIG_BATTERY_BQ27X00_I2C
-+
-+struct bq27000_platform_data {
-+ const char *name;
-+ int (*read)(struct device *dev, unsigned int);
-+};
-+
-+#define DRIVER_VERSION "1.2.0"
-
- #define BQ27x00_REG_TEMP 0x06
- #define BQ27x00_REG_VOLT 0x08
--#define BQ27x00_REG_RSOC 0x0B /* Relative State-of-Charge */
- #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 capaciy */
-+#define BQ27x00_REG_LMD 0x12 /* Last measured discharge */
-+#define BQ27x00_REG_CYCT 0x2A /* Cycle count total */
-+#define BQ27x00_REG_AE 0x22 /* Available enery */
-+
-+#define BQ27000_REG_RSOC 0x0B /* Relative State-of-Charge */
-+#define BQ27000_REG_ILMD 0x76 /* Initial last measured discharge */
-+#define BQ27000_FLAG_CHGS BIT(7)
-+#define BQ27000_FLAG_FC BIT(5)
-+
-+#define BQ27500_REG_SOC 0x2C
-+#define BQ27500_REG_DCAP 0x3C /* Design capacity */
-+#define BQ27500_FLAG_DSC BIT(0)
-+#define BQ27500_FLAG_FC BIT(9)
-
--/* 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);
-+#define BQ27000_RS 20 /* Resistor sense */
-
- struct bq27x00_device_info;
- struct bq27x00_access_methods {
-- int (*read)(u8 reg, int *rt_value, int b_single,
-- struct bq27x00_device_info *di);
-+ 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 capacity;
-+ int flags;
-+
-+ int current_now;
- };
-
- struct bq27x00_device_info {
- struct device *dev;
- int id;
-- int voltage_uV;
-- int current_uA;
-- int temp_C;
-- int charge_rsoc;
-- struct bq27x00_access_methods *bus;
-+ 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 i2c_client *client;
-+ 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_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,
- };
-
-+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 int bq27x00_read(u8 reg, int *rt_value, int b_single,
-- struct bq27x00_device_info *di)
-+static inline int bq27x00_read(struct bq27x00_device_info *di, u8 reg,
-+ bool single)
- {
-- int ret;
-+ 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;
-
-- ret = di->bus->read(reg, rt_value, b_single, di);
-- *rt_value = be16_to_cpu(*rt_value);
-+ if (di->chip == BQ27500)
-+ rsoc = bq27x00_read(di, BQ27500_REG_SOC, false);
-+ else
-+ rsoc = bq27x00_read(di, BQ27000_REG_RSOC, true);
-
-- return ret;
-+ if (rsoc < 0)
-+ dev_err(di->dev, "error reading relative State-of-Charge\n");
-+
-+ return rsoc;
- }
-
- /*
-- * Return the battery temperature in Celcius degrees
-+ * Return a battery charge value in µAh
- * Or < 0 if something fails.
- */
--static int bq27x00_battery_temperature(struct bq27x00_device_info *di)
-+static int bq27x00_battery_read_charge(struct bq27x00_device_info *di, u8 reg)
- {
-- int ret;
-- int temp = 0;
-+ int charge;
-
-- ret = bq27x00_read(BQ27x00_REG_TEMP, &temp, 0, di);
-- if (ret) {
-- dev_err(di->dev, "error reading temperature\n");
-- return ret;
-+ charge = bq27x00_read(di, reg, false);
-+ if (charge < 0) {
-+ dev_err(di->dev, "error reading nominal available capacity\n");
-+ return charge;
- }
-
-- return (temp >> 2) - 273;
-+ if (di->chip == BQ27500)
-+ charge *= 1000;
-+ else
-+ charge = charge * 3570 / BQ27000_RS;
-+
-+ return charge;
- }
-
- /*
-- * Return the battery Voltage in milivolts
-+ * Return the battery Nominal available capaciy in µAh
- * Or < 0 if something fails.
- */
--static int bq27x00_battery_voltage(struct bq27x00_device_info *di)
-+static inline int bq27x00_battery_read_nac(struct bq27x00_device_info *di)
- {
-- int ret;
-- int volt = 0;
-+ return bq27x00_battery_read_charge(di, BQ27x00_REG_NAC);
-+}
-
-- ret = bq27x00_read(BQ27x00_REG_VOLT, &volt, 0, di);
-- if (ret) {
-- dev_err(di->dev, "error reading voltage\n");
-- return ret;
-+/*
-+ * 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_err(di->dev, "error reading initial last measured discharge\n");
-+ return ilmd;
- }
-
-- return volt;
-+ if (di->chip == BQ27500)
-+ ilmd *= 1000;
-+ else
-+ ilmd = ilmd * 256 * 3570 / BQ27000_RS;
-+
-+ return ilmd;
- }
-
- /*
-- * Return the battery average current
-- * Note that current can be negative signed as well
-- * Or 0 if something fails.
-+ * Return the battery Cycle count total
-+ * Or < 0 if something fails.
- */
--static int bq27x00_battery_current(struct bq27x00_device_info *di)
-+static int bq27x00_battery_read_cyct(struct bq27x00_device_info *di)
- {
-- int ret;
-- int curr = 0;
-- int flags = 0;
-+ int cyct;
-
-- ret = bq27x00_read(BQ27x00_REG_AI, &curr, 0, di);
-- if (ret) {
-- dev_err(di->dev, "error reading current\n");
-- return 0;
-+ 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_err(di->dev, "error reading register %02x: %d\n", reg, tval);
-+ return tval;
- }
-- ret = bq27x00_read(BQ27x00_REG_FLAGS, &flags, 0, di);
-- if (ret < 0) {
-- dev_err(di->dev, "error reading flags\n");
-+
-+ if (tval == 65535)
- return 0;
-+
-+ return tval * 60;
-+}
-+
-+static void bq27x00_update(struct bq27x00_device_info *di)
-+{
-+ struct bq27x00_reg_cache cache = {0, };
-+ bool is_bq27500 = di->chip == BQ27500;
-+
-+ cache.flags = bq27x00_read(di, BQ27x00_REG_FLAGS, is_bq27500);
-+ if (cache.flags >= 0) {
-+ cache.capacity = bq27x00_battery_read_rsoc(di);
-+ cache.temperature = bq27x00_read(di, BQ27x00_REG_TEMP, false);
-+ 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);
-+
-+ if (!is_bq27500)
-+ cache.current_now = bq27x00_read(di, BQ27x00_REG_AI, false);
-+
-+ /* 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 ((flags & (1 << 7)) != 0) {
-- dev_dbg(di->dev, "negative current!\n");
-- return -curr;
-+
-+ /* Ignore current_now which is a snapshot of the current battery state
-+ * and is likely to be different even between two consecutive reads */
-+ if (memcmp(&di->cache, &cache, sizeof(cache) - sizeof(int)) != 0) {
-+ di->cache = cache;
-+ power_supply_changed(&di->bat);
-+ }
-+
-+ 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) {
-+ schedule_delayed_work(&di->work, poll_interval * HZ);
- }
-- return curr;
- }
-
-+
- /*
-- * Return the battery Relative State-of-Charge
-+ * Return the battery temperature in tenths of degree Celsius
- * Or < 0 if something fails.
- */
--static int bq27x00_battery_rsoc(struct bq27x00_device_info *di)
-+static int bq27x00_battery_temperature(struct bq27x00_device_info *di,
-+ union power_supply_propval *val)
- {
-- int ret;
-- int rsoc = 0;
-+ if (di->cache.temperature < 0)
-+ return di->cache.temperature;
-
-- ret = bq27x00_read(BQ27x00_REG_RSOC, &rsoc, 1, di);
-- if (ret) {
-- dev_err(di->dev, "error reading relative State-of-Charge\n");
-- return ret;
-+ if (di->chip == BQ27500)
-+ val->intval = di->cache.temperature - 2731;
-+ else
-+ val->intval = ((di->cache.temperature * 5) - 5463) / 2;
-+
-+ return 0;
-+}
-+
-+/*
-+ * 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;
-+
-+ if (di->chip == BQ27500)
-+ curr = bq27x00_read(di, BQ27x00_REG_AI, false);
-+ else
-+ curr = di->cache.current_now;
-+
-+ if (curr < 0)
-+ return curr;
-+
-+ if (di->chip == BQ27500) {
-+ /* bq27500 returns signed value */
-+ val->intval = (int)((s16)curr) * 1000;
-+ } else {
-+ if (di->cache.flags & BQ27000_FLAG_CHGS) {
-+ dev_dbg(di->dev, "negative current!\n");
-+ curr = -curr;
-+ }
-+
-+ val->intval = curr * 3570 / BQ27000_RS;
- }
-
-- return rsoc >> 8;
-+ return 0;
-+}
-+
-+static int bq27x00_battery_status(struct bq27x00_device_info *di,
-+ union power_supply_propval *val)
-+{
-+ int status;
-+
-+ 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;
-+}
-+
-+/*
-+ * 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)
-+ return volt;
-+
-+ val->intval = volt * 1000;
-+
-+ return 0;
-+}
-+
-+/*
-+ * Return the battery Available energy in µWh
-+ * Or < 0 if something fails.
-+ */
-+static int bq27x00_battery_energy(struct bq27x00_device_info *di,
-+ union power_supply_propval *val)
-+{
-+ int ae;
-+
-+ ae = bq27x00_read(di, BQ27x00_REG_AE, false);
-+ if (ae < 0) {
-+ dev_err(di->dev, "error reading available energy\n");
-+ return ae;
-+ }
-+
-+ if (di->chip == BQ27500)
-+ ae *= 1000;
-+ else
-+ ae = ae * 29200 / BQ27000_RS;
-+
-+ val->intval = ae;
-+
-+ 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), \
-@@ -171,89 +443,161 @@ static int bq27x00_battery_get_property(
- 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 = bq27x00_battery_voltage(di);
-- if (psp == POWER_SUPPLY_PROP_PRESENT)
-- val->intval = val->intval <= 0 ? 0 : 1;
-+ val->intval = di->cache.flags < 0 ? 0 : 1;
- break;
- case POWER_SUPPLY_PROP_CURRENT_NOW:
-- val->intval = bq27x00_battery_current(di);
-+ ret = bq27x00_battery_current(di, val);
- break;
- case POWER_SUPPLY_PROP_CAPACITY:
-- val->intval = bq27x00_battery_rsoc(di);
-+ ret = bq27x00_simple_value(di->cache.capacity, val);
- break;
- case POWER_SUPPLY_PROP_TEMP:
-- val->intval = bq27x00_battery_temperature(di);
-+ ret = bq27x00_battery_temperature(di, 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_ENERGY_NOW:
-+ ret = bq27x00_battery_energy(di, val);
- break;
- default:
- return -EINVAL;
- }
-
-- return 0;
-+ return ret;
- }
-
--static void bq27x00_powersupply_init(struct bq27x00_device_info *di)
-+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 = NULL;
-+ 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;
- }
-
--/*
-- * BQ27200 specific code
-+static void bq27x00_powersupply_unregister(struct bq27x00_device_info *di)
-+{
-+ 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 bq27200_read(u8 reg, int *rt_value, int b_single,
-- struct bq27x00_device_info *di)
-+static int bq27x00_read_i2c(struct bq27x00_device_info *di, u8 reg, bool single)
- {
-- struct i2c_client *client = di->client;
-- struct i2c_msg msg[1];
-+ struct i2c_client *client = to_i2c_client(di->dev);
-+ struct i2c_msg msg[2];
- unsigned char data[2];
-- int err;
-+ int ret;
-
- if (!client->adapter)
- return -ENODEV;
-
-- msg->addr = client->addr;
-- msg->flags = 0;
-- msg->len = 1;
-- msg->buf = data;
--
-- data[0] = reg;
-- err = i2c_transfer(client->adapter, msg, 1);
--
-- if (err >= 0) {
-- if (!b_single)
-- msg->len = 2;
-- else
-- msg->len = 1;
-+ 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;
-
-- msg->flags = I2C_M_RD;
-- err = i2c_transfer(client->adapter, msg, 1);
-- if (err >= 0) {
-- if (!b_single)
-- *rt_value = get_unaligned_be16(data);
-- else
-- *rt_value = data[0];
-+ ret = i2c_transfer(client->adapter, msg, ARRAY_SIZE(msg));
-+ if (ret < 0)
-+ return ret;
-
-- return 0;
-- }
-- }
-- return err;
-+ if (!single)
-+ ret = get_unaligned_le16(data);
-+ else
-+ ret = data[0];
-+
-+ return ret;
- }
-
--static int bq27200_battery_probe(struct i2c_client *client,
-+static int bq27x00_battery_probe(struct i2c_client *client,
- const struct i2c_device_id *id)
- {
- char *name;
- struct bq27x00_device_info *di;
-- struct bq27x00_access_methods *bus;
- int num;
- int retval = 0;
-
-@@ -267,7 +611,7 @@ static int bq27200_battery_probe(struct
- if (retval < 0)
- return retval;
-
-- name = kasprintf(GFP_KERNEL, "bq27200-%d", num);
-+ name = kasprintf(GFP_KERNEL, "%s-%d", id->name, num);
- if (!name) {
- dev_err(&client->dev, "failed to allocate device name\n");
- retval = -ENOMEM;
-@@ -280,37 +624,20 @@ static int bq27200_battery_probe(struct
- retval = -ENOMEM;
- goto batt_failed_2;
- }
-- di->id = num;
-
-- bus = kzalloc(sizeof(*bus), GFP_KERNEL);
-- if (!bus) {
-- dev_err(&client->dev, "failed to allocate access method "
-- "data\n");
-- retval = -ENOMEM;
-- goto batt_failed_3;
-- }
--
-- i2c_set_clientdata(client, di);
-+ di->id = num;
- di->dev = &client->dev;
-+ di->chip = id->driver_data;
- di->bat.name = name;
-- bus->read = &bq27200_read;
-- di->bus = bus;
-- di->client = client;
--
-- bq27x00_powersupply_init(di);
-+ di->bus.read = &bq27x00_read_i2c;
-
-- retval = power_supply_register(&client->dev, &di->bat);
-- if (retval) {
-- dev_err(&client->dev, "failed to register battery\n");
-- goto batt_failed_4;
-- }
-+ if (bq27x00_powersupply_init(di))
-+ goto batt_failed_3;
-
-- dev_info(&client->dev, "support ver. %s enabled\n", DRIVER_VERSION);
-+ i2c_set_clientdata(client, di);
-
- return 0;
-
--batt_failed_4:
-- kfree(bus);
- batt_failed_3:
- kfree(di);
- batt_failed_2:
-@@ -323,11 +650,11 @@ batt_failed_1:
- return retval;
- }
-
--static int bq27200_battery_remove(struct i2c_client *client)
-+static int bq27x00_battery_remove(struct i2c_client *client)
- {
- struct bq27x00_device_info *di = i2c_get_clientdata(client);
-
-- power_supply_unregister(&di->bat);
-+ bq27x00_powersupply_unregister(di);
-
- kfree(di->bat.name);
-
-@@ -340,31 +667,180 @@ static int bq27200_battery_remove(struct
- return 0;
- }
-
--/*
-- * Module stuff
-- */
--
--static const struct i2c_device_id bq27200_id[] = {
-- { "bq27200", 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,
-+ .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 __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;
-
--static struct i2c_driver bq27200_battery_driver = {
-+ 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 struct platform_driver bq27000_battery_driver = {
-+ .probe = bq27000_battery_probe,
-+ .remove = __devexit_p(bq27000_battery_remove),
- .driver = {
-- .name = "bq27200-battery",
-+ .name = "bq27000-battery",
-+ .owner = THIS_MODULE,
- },
-- .probe = bq27200_battery_probe,
-- .remove = bq27200_battery_remove,
-- .id_table = bq27200_id,
- };
-
-+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 = i2c_add_driver(&bq27200_battery_driver);
-+ ret = bq27x00_battery_i2c_init();
-+ if (ret)
-+ return ret;
-+
-+ ret = bq27x00_battery_platform_init();
- if (ret)
-- printk(KERN_ERR "Unable to register BQ27200 driver\n");
-+ bq27x00_battery_i2c_exit();
-
- return ret;
- }
-@@ -372,7 +848,8 @@ module_init(bq27x00_battery_init);
-
- static void __exit bq27x00_battery_exit(void)
- {
-- i2c_del_driver(&bq27200_battery_driver);
-+ bq27x00_battery_platform_exit();
-+ bq27x00_battery_i2c_exit();
- }
- module_exit(bq27x00_battery_exit);
-
projects / kernel-bfs / blobdiff