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author | Guenter Roeck <linux@roeck-us.net> | 2014-04-13 11:56:15 -0700 |
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committer | Guenter Roeck <linux@roeck-us.net> | 2014-05-21 16:02:26 -0700 |
commit | c254ffdefc002b57f1e9eedddcb3569c0d80578f (patch) | |
tree | a74e48aac71bc02c00d35f67603ed24a6cbcd802 /drivers/hwmon/lm80.c | |
parent | 85b3ee07b986e90d5e9821dcb28bde340dfc7805 (diff) | |
download | linux-stable-c254ffdefc002b57f1e9eedddcb3569c0d80578f.tar.gz linux-stable-c254ffdefc002b57f1e9eedddcb3569c0d80578f.tar.bz2 linux-stable-c254ffdefc002b57f1e9eedddcb3569c0d80578f.zip |
hwmon: (lm80) Rearrange code to avoid forward declarations
Avoid need for forward declarations by rearranging code.
No functional change.
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Diffstat (limited to 'drivers/hwmon/lm80.c')
-rw-r--r-- | drivers/hwmon/lm80.c | 290 |
1 files changed, 139 insertions, 151 deletions
diff --git a/drivers/hwmon/lm80.c b/drivers/hwmon/lm80.c index 420ad7c5ec28..4bcd9b882948 100644 --- a/drivers/hwmon/lm80.c +++ b/drivers/hwmon/lm80.c @@ -140,39 +140,130 @@ struct lm80_data { u16 alarms; /* Register encoding, combined */ }; -/* - * Functions declaration - */ +static int lm80_read_value(struct i2c_client *client, u8 reg) +{ + return i2c_smbus_read_byte_data(client, reg); +} -static int lm80_probe(struct i2c_client *client, - const struct i2c_device_id *id); -static int lm80_detect(struct i2c_client *client, struct i2c_board_info *info); -static void lm80_init_client(struct i2c_client *client); -static struct lm80_data *lm80_update_device(struct device *dev); -static int lm80_read_value(struct i2c_client *client, u8 reg); -static int lm80_write_value(struct i2c_client *client, u8 reg, u8 value); +static int lm80_write_value(struct i2c_client *client, u8 reg, u8 value) +{ + return i2c_smbus_write_byte_data(client, reg, value); +} -/* - * Driver data (common to all clients) - */ +/* Called when we have found a new LM80 and after read errors */ +static void lm80_init_client(struct i2c_client *client) +{ + /* + * Reset all except Watchdog values and last conversion values + * This sets fan-divs to 2, among others. This makes most other + * initializations unnecessary + */ + lm80_write_value(client, LM80_REG_CONFIG, 0x80); + /* Set 11-bit temperature resolution */ + lm80_write_value(client, LM80_REG_RES, 0x08); -static const struct i2c_device_id lm80_id[] = { - { "lm80", 0 }, - { "lm96080", 1 }, - { } -}; -MODULE_DEVICE_TABLE(i2c, lm80_id); + /* Start monitoring */ + lm80_write_value(client, LM80_REG_CONFIG, 0x01); +} -static struct i2c_driver lm80_driver = { - .class = I2C_CLASS_HWMON, - .driver = { - .name = "lm80", - }, - .probe = lm80_probe, - .id_table = lm80_id, - .detect = lm80_detect, - .address_list = normal_i2c, -}; +static struct lm80_data *lm80_update_device(struct device *dev) +{ + struct lm80_data *data = dev_get_drvdata(dev); + struct i2c_client *client = data->client; + int i; + int rv; + int prev_rv; + struct lm80_data *ret = data; + + mutex_lock(&data->update_lock); + + if (data->error) + lm80_init_client(client); + + if (time_after(jiffies, data->last_updated + 2 * HZ) || !data->valid) { + dev_dbg(dev, "Starting lm80 update\n"); + for (i = 0; i <= 6; i++) { + rv = lm80_read_value(client, LM80_REG_IN(i)); + if (rv < 0) + goto abort; + data->in[i_input][i] = rv; + + rv = lm80_read_value(client, LM80_REG_IN_MIN(i)); + if (rv < 0) + goto abort; + data->in[i_min][i] = rv; + + rv = lm80_read_value(client, LM80_REG_IN_MAX(i)); + if (rv < 0) + goto abort; + data->in[i_max][i] = rv; + } + + rv = lm80_read_value(client, LM80_REG_FAN1); + if (rv < 0) + goto abort; + data->fan[f_input][0] = rv; + + rv = lm80_read_value(client, LM80_REG_FAN_MIN(1)); + if (rv < 0) + goto abort; + data->fan[f_min][0] = rv; + + rv = lm80_read_value(client, LM80_REG_FAN2); + if (rv < 0) + goto abort; + data->fan[f_input][1] = rv; + + rv = lm80_read_value(client, LM80_REG_FAN_MIN(2)); + if (rv < 0) + goto abort; + data->fan[f_min][1] = rv; + + prev_rv = rv = lm80_read_value(client, LM80_REG_TEMP); + if (rv < 0) + goto abort; + rv = lm80_read_value(client, LM80_REG_RES); + if (rv < 0) + goto abort; + data->temp[t_input] = (prev_rv << 8) | (rv & 0xf0); + + for (i = t_input + 1; i < t_num_temp; i++) { + rv = lm80_read_value(client, temp_regs[i]); + if (rv < 0) + goto abort; + data->temp[i] = rv << 8; + } + + rv = lm80_read_value(client, LM80_REG_FANDIV); + if (rv < 0) + goto abort; + data->fan_div[0] = (rv >> 2) & 0x03; + data->fan_div[1] = (rv >> 4) & 0x03; + + prev_rv = rv = lm80_read_value(client, LM80_REG_ALARM1); + if (rv < 0) + goto abort; + rv = lm80_read_value(client, LM80_REG_ALARM2); + if (rv < 0) + goto abort; + data->alarms = prev_rv + (rv << 8); + + data->last_updated = jiffies; + data->valid = 1; + data->error = 0; + } + goto done; + +abort: + ret = ERR_PTR(rv); + data->valid = 0; + data->error = 1; + +done: + mutex_unlock(&data->update_lock); + + return ret; +} /* * Sysfs stuff @@ -553,130 +644,27 @@ static int lm80_probe(struct i2c_client *client, return PTR_ERR_OR_ZERO(hwmon_dev); } -static int lm80_read_value(struct i2c_client *client, u8 reg) -{ - return i2c_smbus_read_byte_data(client, reg); -} - -static int lm80_write_value(struct i2c_client *client, u8 reg, u8 value) -{ - return i2c_smbus_write_byte_data(client, reg, value); -} - -/* Called when we have found a new LM80. */ -static void lm80_init_client(struct i2c_client *client) -{ - /* - * Reset all except Watchdog values and last conversion values - * This sets fan-divs to 2, among others. This makes most other - * initializations unnecessary - */ - lm80_write_value(client, LM80_REG_CONFIG, 0x80); - /* Set 11-bit temperature resolution */ - lm80_write_value(client, LM80_REG_RES, 0x08); - - /* Start monitoring */ - lm80_write_value(client, LM80_REG_CONFIG, 0x01); -} - -static struct lm80_data *lm80_update_device(struct device *dev) -{ - struct lm80_data *data = dev_get_drvdata(dev); - struct i2c_client *client = data->client; - int i; - int rv; - int prev_rv; - struct lm80_data *ret = data; - - mutex_lock(&data->update_lock); - - if (data->error) - lm80_init_client(client); - - if (time_after(jiffies, data->last_updated + 2 * HZ) || !data->valid) { - dev_dbg(dev, "Starting lm80 update\n"); - for (i = 0; i <= 6; i++) { - rv = lm80_read_value(client, LM80_REG_IN(i)); - if (rv < 0) - goto abort; - data->in[i_input][i] = rv; - - rv = lm80_read_value(client, LM80_REG_IN_MIN(i)); - if (rv < 0) - goto abort; - data->in[i_min][i] = rv; - - rv = lm80_read_value(client, LM80_REG_IN_MAX(i)); - if (rv < 0) - goto abort; - data->in[i_max][i] = rv; - } - - rv = lm80_read_value(client, LM80_REG_FAN1); - if (rv < 0) - goto abort; - data->fan[f_input][0] = rv; - - rv = lm80_read_value(client, LM80_REG_FAN_MIN(1)); - if (rv < 0) - goto abort; - data->fan[f_min][0] = rv; - - rv = lm80_read_value(client, LM80_REG_FAN2); - if (rv < 0) - goto abort; - data->fan[f_input][1] = rv; - - rv = lm80_read_value(client, LM80_REG_FAN_MIN(2)); - if (rv < 0) - goto abort; - data->fan[f_min][1] = rv; - - prev_rv = rv = lm80_read_value(client, LM80_REG_TEMP); - if (rv < 0) - goto abort; - rv = lm80_read_value(client, LM80_REG_RES); - if (rv < 0) - goto abort; - data->temp[t_input] = (prev_rv << 8) | (rv & 0xf0); - - for (i = t_input + 1; i < t_num_temp; i++) { - rv = lm80_read_value(client, temp_regs[i]); - if (rv < 0) - goto abort; - data->temp[i] = rv << 8; - } - - rv = lm80_read_value(client, LM80_REG_FANDIV); - if (rv < 0) - goto abort; - data->fan_div[0] = (rv >> 2) & 0x03; - data->fan_div[1] = (rv >> 4) & 0x03; - - prev_rv = rv = lm80_read_value(client, LM80_REG_ALARM1); - if (rv < 0) - goto abort; - rv = lm80_read_value(client, LM80_REG_ALARM2); - if (rv < 0) - goto abort; - data->alarms = prev_rv + (rv << 8); - - data->last_updated = jiffies; - data->valid = 1; - data->error = 0; - } - goto done; - -abort: - ret = ERR_PTR(rv); - data->valid = 0; - data->error = 1; +/* + * Driver data (common to all clients) + */ -done: - mutex_unlock(&data->update_lock); +static const struct i2c_device_id lm80_id[] = { + { "lm80", 0 }, + { "lm96080", 1 }, + { } +}; +MODULE_DEVICE_TABLE(i2c, lm80_id); - return ret; -} +static struct i2c_driver lm80_driver = { + .class = I2C_CLASS_HWMON, + .driver = { + .name = "lm80", + }, + .probe = lm80_probe, + .id_table = lm80_id, + .detect = lm80_detect, + .address_list = normal_i2c, +}; module_i2c_driver(lm80_driver); |