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https://github.com/torvalds/linux
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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 <lars@metafoo.de> Acked-by: Rodolfo Giometti <giometti@linux.it> Tested-by: Grazvydas Ignotas <notasas@gmail.com>
This commit is contained in:
Lars-Peter Clausen
parent
3413b4ea25
commit
a40402ef0b
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@ -54,8 +54,8 @@ static DEFINE_MUTEX(battery_mutex);
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struct bq27x00_device_info;
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struct bq27x00_access_methods {
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int (*read)(u8 reg, int *rt_value, int b_single,
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struct bq27x00_device_info *di);
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int (*read)(struct bq27x00_device_info *, u8 reg, int *rt_value,
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bool single);
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};
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enum bq27x00_chip { BQ27000, BQ27500 };
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@ -63,11 +63,11 @@ enum bq27x00_chip { BQ27000, BQ27500 };
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struct bq27x00_device_info {
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struct device *dev;
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int id;
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struct bq27x00_access_methods *bus;
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struct power_supply bat;
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enum bq27x00_chip chip;
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struct i2c_client *client;
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struct power_supply bat;
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struct bq27x00_access_methods bus;
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};
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static enum power_supply_property bq27x00_battery_props[] = {
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@ -87,10 +87,10 @@ static enum power_supply_property bq27x00_battery_props[] = {
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* Common code for BQ27x00 devices
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*/
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static int bq27x00_read(u8 reg, int *rt_value, int b_single,
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struct bq27x00_device_info *di)
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static inline int bq27x00_read(struct bq27x00_device_info *di, u8 reg,
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int *rt_value, bool single)
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{
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return di->bus->read(reg, rt_value, b_single, di);
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return di->bus.read(di, reg, rt_value, single);
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}
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/*
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@ -102,7 +102,7 @@ static int bq27x00_battery_temperature(struct bq27x00_device_info *di)
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int ret;
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int temp = 0;
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ret = bq27x00_read(BQ27x00_REG_TEMP, &temp, 0, di);
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ret = bq27x00_read(di, BQ27x00_REG_TEMP, &temp, false);
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if (ret) {
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dev_err(di->dev, "error reading temperature\n");
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return ret;
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@ -123,7 +123,7 @@ static int bq27x00_battery_voltage(struct bq27x00_device_info *di)
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int ret;
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int volt = 0;
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ret = bq27x00_read(BQ27x00_REG_VOLT, &volt, 0, di);
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ret = bq27x00_read(di, BQ27x00_REG_VOLT, &volt, false);
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if (ret) {
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dev_err(di->dev, "error reading voltage\n");
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return ret;
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@ -143,7 +143,7 @@ static int bq27x00_battery_current(struct bq27x00_device_info *di)
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int curr = 0;
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int flags = 0;
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ret = bq27x00_read(BQ27x00_REG_AI, &curr, 0, di);
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ret = bq27x00_read(di, BQ27x00_REG_AI, &curr, false);
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if (ret) {
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dev_err(di->dev, "error reading current\n");
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return 0;
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@ -153,7 +153,7 @@ static int bq27x00_battery_current(struct bq27x00_device_info *di)
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/* bq27500 returns signed value */
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curr = (int)((s16)curr) * 1000;
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} else {
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ret = bq27x00_read(BQ27x00_REG_FLAGS, &flags, 0, di);
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ret = bq27x00_read(di, BQ27x00_REG_FLAGS, &flags, false);
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if (ret < 0) {
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dev_err(di->dev, "error reading flags\n");
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return 0;
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@ -178,9 +178,9 @@ static int bq27x00_battery_rsoc(struct bq27x00_device_info *di)
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int rsoc = 0;
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if (di->chip == BQ27500)
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ret = bq27x00_read(BQ27500_REG_SOC, &rsoc, 0, di);
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ret = bq27x00_read(di, BQ27500_REG_SOC, &rsoc, false);
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else
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ret = bq27x00_read(BQ27000_REG_RSOC, &rsoc, 1, di);
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ret = bq27x00_read(di, BQ27000_REG_RSOC, &rsoc, true);
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if (ret) {
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dev_err(di->dev, "error reading relative State-of-Charge\n");
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return ret;
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@ -196,7 +196,7 @@ static int bq27x00_battery_status(struct bq27x00_device_info *di,
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int status;
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int ret;
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ret = bq27x00_read(BQ27x00_REG_FLAGS, &flags, 0, di);
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ret = bq27x00_read(di, BQ27x00_REG_FLAGS, &flags, false);
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if (ret < 0) {
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dev_err(di->dev, "error reading flags\n");
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return ret;
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@ -230,7 +230,7 @@ static int bq27x00_battery_time(struct bq27x00_device_info *di, int reg,
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int tval = 0;
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int ret;
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ret = bq27x00_read(reg, &tval, 0, di);
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ret = bq27x00_read(di, reg, &tval, false);
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if (ret) {
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dev_err(di->dev, "error reading register %02x\n", reg);
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return ret;
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@ -296,23 +296,35 @@ static int bq27x00_battery_get_property(struct power_supply *psy,
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return ret;
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}
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static void bq27x00_powersupply_init(struct bq27x00_device_info *di)
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static int bq27x00_powersupply_init(struct bq27x00_device_info *di)
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{
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int ret;
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di->bat.type = POWER_SUPPLY_TYPE_BATTERY;
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di->bat.properties = bq27x00_battery_props;
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di->bat.num_properties = ARRAY_SIZE(bq27x00_battery_props);
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di->bat.get_property = bq27x00_battery_get_property;
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di->bat.external_power_changed = NULL;
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ret = power_supply_register(di->dev, &di->bat);
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if (ret) {
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dev_err(di->dev, "failed to register battery: %d\n", ret);
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return ret;
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}
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dev_info(di->dev, "support ver. %s enabled\n", DRIVER_VERSION);
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return 0;
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}
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/*
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* i2c specific code
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*/
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static int bq27x00_read_i2c(u8 reg, int *rt_value, int b_single,
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struct bq27x00_device_info *di)
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static int bq27x00_read_i2c(struct bq27x00_device_info *di, u8 reg,
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int *rt_value, bool single)
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{
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struct i2c_client *client = di->client;
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struct i2c_client *client = to_i2c_client(di->dev);
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struct i2c_msg msg[1];
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unsigned char data[2];
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int err;
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@ -329,7 +341,7 @@ static int bq27x00_read_i2c(u8 reg, int *rt_value, int b_single,
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err = i2c_transfer(client->adapter, msg, 1);
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if (err >= 0) {
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if (!b_single)
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if (!single)
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msg->len = 2;
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else
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msg->len = 1;
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@ -337,7 +349,7 @@ static int bq27x00_read_i2c(u8 reg, int *rt_value, int b_single,
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msg->flags = I2C_M_RD;
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err = i2c_transfer(client->adapter, msg, 1);
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if (err >= 0) {
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if (!b_single)
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if (!single)
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*rt_value = get_unaligned_le16(data);
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else
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*rt_value = data[0];
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@ -353,7 +365,6 @@ static int bq27x00_battery_probe(struct i2c_client *client,
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{
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char *name;
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struct bq27x00_device_info *di;
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struct bq27x00_access_methods *bus;
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int num;
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int retval = 0;
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@ -380,38 +391,20 @@ static int bq27x00_battery_probe(struct i2c_client *client,
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retval = -ENOMEM;
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goto batt_failed_2;
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}
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di->id = num;
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di->chip = id->driver_data;
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bus = kzalloc(sizeof(*bus), GFP_KERNEL);
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if (!bus) {
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dev_err(&client->dev, "failed to allocate access method "
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"data\n");
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retval = -ENOMEM;
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di->id = num;
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di->dev = &client->dev;
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di->chip = id->driver_data;
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di->bat.name = name;
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di->bus.read = &bq27x00_read_i2c;
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if (bq27x00_powersupply_init(di))
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goto batt_failed_3;
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}
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i2c_set_clientdata(client, di);
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di->dev = &client->dev;
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di->bat.name = name;
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bus->read = &bq27x00_read_i2c;
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di->bus = bus;
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di->client = client;
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bq27x00_powersupply_init(di);
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retval = power_supply_register(&client->dev, &di->bat);
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if (retval) {
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dev_err(&client->dev, "failed to register battery\n");
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goto batt_failed_4;
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}
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dev_info(&client->dev, "support ver. %s enabled\n", DRIVER_VERSION);
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return 0;
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batt_failed_4:
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kfree(bus);
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batt_failed_3:
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kfree(di);
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batt_failed_2:
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@ -430,7 +423,6 @@ static int bq27x00_battery_remove(struct i2c_client *client)
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power_supply_unregister(&di->bat);
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kfree(di->bus);
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kfree(di->bat.name);
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mutex_lock(&battery_mutex);
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