From a40402ef0bf3b6e53a7dfd396e9487eb2f613e19 Mon Sep 17 00:00:00 2001 From: Lars-Peter Clausen Date: Mon, 24 May 2010 19:37:58 +0200 Subject: bq27x00: Prepare code for addition of bq27000 platform driver This patch simplifies the drivers data structure and moves code to be shared by the bq27000 and bq27200/bq27500 init functions into a common function. This patch has no functional changes, it only moves code around. Signed-off-by: Lars-Peter Clausen Acked-by: Rodolfo Giometti Tested-by: Grazvydas Ignotas --- drivers/power/bq27x00_battery.c | 86 +++++++++++++++++++---------------------- 1 file changed, 39 insertions(+), 47 deletions(-) (limited to 'drivers/power/bq27x00_battery.c') diff --git a/drivers/power/bq27x00_battery.c b/drivers/power/bq27x00_battery.c index 9f16666..def951d 100644 --- a/drivers/power/bq27x00_battery.c +++ b/drivers/power/bq27x00_battery.c @@ -54,8 +54,8 @@ static DEFINE_MUTEX(battery_mutex); 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 *, u8 reg, int *rt_value, + bool single); }; enum bq27x00_chip { BQ27000, BQ27500 }; @@ -63,11 +63,11 @@ enum bq27x00_chip { BQ27000, BQ27500 }; struct bq27x00_device_info { struct device *dev; int id; - struct bq27x00_access_methods *bus; - struct power_supply bat; enum bq27x00_chip chip; - struct i2c_client *client; + struct power_supply bat; + + struct bq27x00_access_methods bus; }; static enum power_supply_property bq27x00_battery_props[] = { @@ -87,10 +87,10 @@ static enum power_supply_property bq27x00_battery_props[] = { * 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, + int *rt_value, bool single) { - return di->bus->read(reg, rt_value, b_single, di); + return di->bus.read(di, reg, rt_value, single); } /* @@ -102,7 +102,7 @@ static int bq27x00_battery_temperature(struct bq27x00_device_info *di) int ret; int temp = 0; - ret = bq27x00_read(BQ27x00_REG_TEMP, &temp, 0, di); + ret = bq27x00_read(di, BQ27x00_REG_TEMP, &temp, false); if (ret) { dev_err(di->dev, "error reading temperature\n"); return ret; @@ -123,7 +123,7 @@ static int bq27x00_battery_voltage(struct bq27x00_device_info *di) int ret; int volt = 0; - ret = bq27x00_read(BQ27x00_REG_VOLT, &volt, 0, di); + ret = bq27x00_read(di, BQ27x00_REG_VOLT, &volt, false); if (ret) { dev_err(di->dev, "error reading voltage\n"); return ret; @@ -143,7 +143,7 @@ static int bq27x00_battery_current(struct bq27x00_device_info *di) int curr = 0; int flags = 0; - ret = bq27x00_read(BQ27x00_REG_AI, &curr, 0, di); + ret = bq27x00_read(di, BQ27x00_REG_AI, &curr, false); if (ret) { dev_err(di->dev, "error reading current\n"); return 0; @@ -153,7 +153,7 @@ static int bq27x00_battery_current(struct bq27x00_device_info *di) /* bq27500 returns signed value */ curr = (int)((s16)curr) * 1000; } else { - ret = bq27x00_read(BQ27x00_REG_FLAGS, &flags, 0, di); + ret = bq27x00_read(di, BQ27x00_REG_FLAGS, &flags, false); if (ret < 0) { dev_err(di->dev, "error reading flags\n"); return 0; @@ -178,9 +178,9 @@ static int bq27x00_battery_rsoc(struct bq27x00_device_info *di) int rsoc = 0; if (di->chip == BQ27500) - ret = bq27x00_read(BQ27500_REG_SOC, &rsoc, 0, di); + ret = bq27x00_read(di, BQ27500_REG_SOC, &rsoc, false); else - ret = bq27x00_read(BQ27000_REG_RSOC, &rsoc, 1, di); + ret = bq27x00_read(di, BQ27000_REG_RSOC, &rsoc, true); if (ret) { dev_err(di->dev, "error reading relative State-of-Charge\n"); return ret; @@ -196,7 +196,7 @@ static int bq27x00_battery_status(struct bq27x00_device_info *di, int status; int ret; - ret = bq27x00_read(BQ27x00_REG_FLAGS, &flags, 0, di); + ret = bq27x00_read(di, BQ27x00_REG_FLAGS, &flags, false); if (ret < 0) { dev_err(di->dev, "error reading flags\n"); return ret; @@ -230,7 +230,7 @@ static int bq27x00_battery_time(struct bq27x00_device_info *di, int reg, int tval = 0; int ret; - ret = bq27x00_read(reg, &tval, 0, di); + ret = bq27x00_read(di, reg, &tval, false); if (ret) { dev_err(di->dev, "error reading register %02x\n", reg); return ret; @@ -296,23 +296,35 @@ static int bq27x00_battery_get_property(struct power_supply *psy, return ret; } -static void bq27x00_powersupply_init(struct bq27x00_device_info *di) +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; + + 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); + + return 0; } /* * i2c specific code */ -static int bq27x00_read_i2c(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, + int *rt_value, bool single) { - struct i2c_client *client = di->client; + struct i2c_client *client = to_i2c_client(di->dev); struct i2c_msg msg[1]; unsigned char data[2]; int err; @@ -329,7 +341,7 @@ static int bq27x00_read_i2c(u8 reg, int *rt_value, int b_single, err = i2c_transfer(client->adapter, msg, 1); if (err >= 0) { - if (!b_single) + if (!single) msg->len = 2; else msg->len = 1; @@ -337,7 +349,7 @@ static int bq27x00_read_i2c(u8 reg, int *rt_value, int b_single, msg->flags = I2C_M_RD; err = i2c_transfer(client->adapter, msg, 1); if (err >= 0) { - if (!b_single) + if (!single) *rt_value = get_unaligned_le16(data); else *rt_value = data[0]; @@ -353,7 +365,6 @@ static int bq27x00_battery_probe(struct i2c_client *client, { char *name; struct bq27x00_device_info *di; - struct bq27x00_access_methods *bus; int num; int retval = 0; @@ -380,38 +391,20 @@ static int bq27x00_battery_probe(struct i2c_client *client, 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; - bus = kzalloc(sizeof(*bus), GFP_KERNEL); - if (!bus) { - dev_err(&client->dev, "failed to allocate access method " - "data\n"); - retval = -ENOMEM; + if (bq27x00_powersupply_init(di)) goto batt_failed_3; - } i2c_set_clientdata(client, di); - di->dev = &client->dev; - di->bat.name = name; - bus->read = &bq27x00_read_i2c; - di->bus = bus; - di->client = client; - - bq27x00_powersupply_init(di); - - retval = power_supply_register(&client->dev, &di->bat); - if (retval) { - dev_err(&client->dev, "failed to register battery\n"); - goto batt_failed_4; - } - - dev_info(&client->dev, "support ver. %s enabled\n", DRIVER_VERSION); return 0; -batt_failed_4: - kfree(bus); batt_failed_3: kfree(di); batt_failed_2: @@ -430,7 +423,6 @@ static int bq27x00_battery_remove(struct i2c_client *client) power_supply_unregister(&di->bat); - kfree(di->bus); kfree(di->bat.name); mutex_lock(&battery_mutex); -- cgit v1.1