From 4341fc3f32b278d136179772338ccaa31f222c99 Mon Sep 17 00:00:00 2001 From: Axel Lin Date: Thu, 3 Jul 2014 21:59:49 +0800 Subject: hwmon: (adm9240) Avoid forward declaration Reorder functions to avoid forward declaration. Signed-off-by: Axel Lin Signed-off-by: Guenter Roeck --- drivers/hwmon/adm9240.c | 315 +++++++++++++++++++++++------------------------- 1 file changed, 153 insertions(+), 162 deletions(-) diff --git a/drivers/hwmon/adm9240.c b/drivers/hwmon/adm9240.c index 086d02a9ecdc..8235ae4cbeb5 100644 --- a/drivers/hwmon/adm9240.c +++ b/drivers/hwmon/adm9240.c @@ -130,35 +130,6 @@ static inline unsigned int AOUT_FROM_REG(u8 reg) return SCALE(reg, 1250, 255); } -static int adm9240_probe(struct i2c_client *client, - const struct i2c_device_id *id); -static int adm9240_detect(struct i2c_client *client, - struct i2c_board_info *info); -static void adm9240_init_client(struct i2c_client *client); -static int adm9240_remove(struct i2c_client *client); -static struct adm9240_data *adm9240_update_device(struct device *dev); - -/* driver data */ -static const struct i2c_device_id adm9240_id[] = { - { "adm9240", adm9240 }, - { "ds1780", ds1780 }, - { "lm81", lm81 }, - { } -}; -MODULE_DEVICE_TABLE(i2c, adm9240_id); - -static struct i2c_driver adm9240_driver = { - .class = I2C_CLASS_HWMON, - .driver = { - .name = "adm9240", - }, - .probe = adm9240_probe, - .remove = adm9240_remove, - .id_table = adm9240_id, - .detect = adm9240_detect, - .address_list = normal_i2c, -}; - /* per client data */ struct adm9240_data { struct device *hwmon_dev; @@ -181,6 +152,110 @@ struct adm9240_data { u8 vrm; /* -- vrm set on startup, no accessor */ }; +/* write new fan div, callers must hold data->update_lock */ +static void adm9240_write_fan_div(struct i2c_client *client, int nr, + u8 fan_div) +{ + u8 reg, old, shift = (nr + 2) * 2; + + reg = i2c_smbus_read_byte_data(client, ADM9240_REG_VID_FAN_DIV); + old = (reg >> shift) & 3; + reg &= ~(3 << shift); + reg |= (fan_div << shift); + i2c_smbus_write_byte_data(client, ADM9240_REG_VID_FAN_DIV, reg); + dev_dbg(&client->dev, + "fan%d clock divider changed from %u to %u\n", + nr + 1, 1 << old, 1 << fan_div); +} + +static struct adm9240_data *adm9240_update_device(struct device *dev) +{ + struct i2c_client *client = to_i2c_client(dev); + struct adm9240_data *data = i2c_get_clientdata(client); + int i; + + mutex_lock(&data->update_lock); + + /* minimum measurement cycle: 1.75 seconds */ + if (time_after(jiffies, data->last_updated_measure + (HZ * 7 / 4)) + || !data->valid) { + + for (i = 0; i < 6; i++) { /* read voltages */ + data->in[i] = i2c_smbus_read_byte_data(client, + ADM9240_REG_IN(i)); + } + data->alarms = i2c_smbus_read_byte_data(client, + ADM9240_REG_INT(0)) | + i2c_smbus_read_byte_data(client, + ADM9240_REG_INT(1)) << 8; + + /* + * read temperature: assume temperature changes less than + * 0.5'C per two measurement cycles thus ignore possible + * but unlikely aliasing error on lsb reading. --Grant + */ + data->temp = ((i2c_smbus_read_byte_data(client, + ADM9240_REG_TEMP) << 8) | + i2c_smbus_read_byte_data(client, + ADM9240_REG_TEMP_CONF)) / 128; + + for (i = 0; i < 2; i++) { /* read fans */ + data->fan[i] = i2c_smbus_read_byte_data(client, + ADM9240_REG_FAN(i)); + + /* adjust fan clock divider on overflow */ + if (data->valid && data->fan[i] == 255 && + data->fan_div[i] < 3) { + + adm9240_write_fan_div(client, i, + ++data->fan_div[i]); + + /* adjust fan_min if active, but not to 0 */ + if (data->fan_min[i] < 255 && + data->fan_min[i] >= 2) + data->fan_min[i] /= 2; + } + } + data->last_updated_measure = jiffies; + } + + /* minimum config reading cycle: 300 seconds */ + if (time_after(jiffies, data->last_updated_config + (HZ * 300)) + || !data->valid) { + + for (i = 0; i < 6; i++) { + data->in_min[i] = i2c_smbus_read_byte_data(client, + ADM9240_REG_IN_MIN(i)); + data->in_max[i] = i2c_smbus_read_byte_data(client, + ADM9240_REG_IN_MAX(i)); + } + for (i = 0; i < 2; i++) { + data->fan_min[i] = i2c_smbus_read_byte_data(client, + ADM9240_REG_FAN_MIN(i)); + } + data->temp_max[0] = i2c_smbus_read_byte_data(client, + ADM9240_REG_TEMP_MAX(0)); + data->temp_max[1] = i2c_smbus_read_byte_data(client, + ADM9240_REG_TEMP_MAX(1)); + + /* read fan divs and 5-bit VID */ + i = i2c_smbus_read_byte_data(client, ADM9240_REG_VID_FAN_DIV); + data->fan_div[0] = (i >> 4) & 3; + data->fan_div[1] = (i >> 6) & 3; + data->vid = i & 0x0f; + data->vid |= (i2c_smbus_read_byte_data(client, + ADM9240_REG_VID4) & 1) << 4; + /* read analog out */ + data->aout = i2c_smbus_read_byte_data(client, + ADM9240_REG_ANALOG_OUT); + + data->last_updated_config = jiffies; + data->valid = 1; + } + mutex_unlock(&data->update_lock); + return data; +} + /*** sysfs accessors ***/ /* temperature */ @@ -340,22 +415,6 @@ static ssize_t show_fan_div(struct device *dev, return sprintf(buf, "%d\n", 1 << data->fan_div[attr->index]); } -/* write new fan div, callers must hold data->update_lock */ -static void adm9240_write_fan_div(struct i2c_client *client, int nr, - u8 fan_div) -{ - u8 reg, old, shift = (nr + 2) * 2; - - reg = i2c_smbus_read_byte_data(client, ADM9240_REG_VID_FAN_DIV); - old = (reg >> shift) & 3; - reg &= ~(3 << shift); - reg |= (fan_div << shift); - i2c_smbus_write_byte_data(client, ADM9240_REG_VID_FAN_DIV, reg); - dev_dbg(&client->dev, - "fan%d clock divider changed from %u to %u\n", - nr + 1, 1 << old, 1 << fan_div); -} - /* * set fan speed low limit: * @@ -620,49 +679,6 @@ static int adm9240_detect(struct i2c_client *new_client, return 0; } -static int adm9240_probe(struct i2c_client *new_client, - const struct i2c_device_id *id) -{ - struct adm9240_data *data; - int err; - - data = devm_kzalloc(&new_client->dev, sizeof(*data), GFP_KERNEL); - if (!data) - return -ENOMEM; - - i2c_set_clientdata(new_client, data); - mutex_init(&data->update_lock); - - adm9240_init_client(new_client); - - /* populate sysfs filesystem */ - err = sysfs_create_group(&new_client->dev.kobj, &adm9240_group); - if (err) - return err; - - data->hwmon_dev = hwmon_device_register(&new_client->dev); - if (IS_ERR(data->hwmon_dev)) { - err = PTR_ERR(data->hwmon_dev); - goto exit_remove; - } - - return 0; - -exit_remove: - sysfs_remove_group(&new_client->dev.kobj, &adm9240_group); - return err; -} - -static int adm9240_remove(struct i2c_client *client) -{ - struct adm9240_data *data = i2c_get_clientdata(client); - - hwmon_device_unregister(data->hwmon_dev); - sysfs_remove_group(&client->dev.kobj, &adm9240_group); - - return 0; -} - static void adm9240_init_client(struct i2c_client *client) { struct adm9240_data *data = i2c_get_clientdata(client); @@ -705,93 +721,68 @@ static void adm9240_init_client(struct i2c_client *client) } } -static struct adm9240_data *adm9240_update_device(struct device *dev) +static int adm9240_probe(struct i2c_client *new_client, + const struct i2c_device_id *id) { - struct i2c_client *client = to_i2c_client(dev); - struct adm9240_data *data = i2c_get_clientdata(client); - int i; + struct adm9240_data *data; + int err; - mutex_lock(&data->update_lock); + data = devm_kzalloc(&new_client->dev, sizeof(*data), GFP_KERNEL); + if (!data) + return -ENOMEM; - /* minimum measurement cycle: 1.75 seconds */ - if (time_after(jiffies, data->last_updated_measure + (HZ * 7 / 4)) - || !data->valid) { + i2c_set_clientdata(new_client, data); + mutex_init(&data->update_lock); - for (i = 0; i < 6; i++) { /* read voltages */ - data->in[i] = i2c_smbus_read_byte_data(client, - ADM9240_REG_IN(i)); - } - data->alarms = i2c_smbus_read_byte_data(client, - ADM9240_REG_INT(0)) | - i2c_smbus_read_byte_data(client, - ADM9240_REG_INT(1)) << 8; + adm9240_init_client(new_client); - /* - * read temperature: assume temperature changes less than - * 0.5'C per two measurement cycles thus ignore possible - * but unlikely aliasing error on lsb reading. --Grant - */ - data->temp = ((i2c_smbus_read_byte_data(client, - ADM9240_REG_TEMP) << 8) | - i2c_smbus_read_byte_data(client, - ADM9240_REG_TEMP_CONF)) / 128; + /* populate sysfs filesystem */ + err = sysfs_create_group(&new_client->dev.kobj, &adm9240_group); + if (err) + return err; - for (i = 0; i < 2; i++) { /* read fans */ - data->fan[i] = i2c_smbus_read_byte_data(client, - ADM9240_REG_FAN(i)); + data->hwmon_dev = hwmon_device_register(&new_client->dev); + if (IS_ERR(data->hwmon_dev)) { + err = PTR_ERR(data->hwmon_dev); + goto exit_remove; + } - /* adjust fan clock divider on overflow */ - if (data->valid && data->fan[i] == 255 && - data->fan_div[i] < 3) { + return 0; - adm9240_write_fan_div(client, i, - ++data->fan_div[i]); +exit_remove: + sysfs_remove_group(&new_client->dev.kobj, &adm9240_group); + return err; +} - /* adjust fan_min if active, but not to 0 */ - if (data->fan_min[i] < 255 && - data->fan_min[i] >= 2) - data->fan_min[i] /= 2; - } - } - data->last_updated_measure = jiffies; - } +static int adm9240_remove(struct i2c_client *client) +{ + struct adm9240_data *data = i2c_get_clientdata(client); - /* minimum config reading cycle: 300 seconds */ - if (time_after(jiffies, data->last_updated_config + (HZ * 300)) - || !data->valid) { + hwmon_device_unregister(data->hwmon_dev); + sysfs_remove_group(&client->dev.kobj, &adm9240_group); - for (i = 0; i < 6; i++) { - data->in_min[i] = i2c_smbus_read_byte_data(client, - ADM9240_REG_IN_MIN(i)); - data->in_max[i] = i2c_smbus_read_byte_data(client, - ADM9240_REG_IN_MAX(i)); - } - for (i = 0; i < 2; i++) { - data->fan_min[i] = i2c_smbus_read_byte_data(client, - ADM9240_REG_FAN_MIN(i)); - } - data->temp_max[0] = i2c_smbus_read_byte_data(client, - ADM9240_REG_TEMP_MAX(0)); - data->temp_max[1] = i2c_smbus_read_byte_data(client, - ADM9240_REG_TEMP_MAX(1)); + return 0; +} - /* read fan divs and 5-bit VID */ - i = i2c_smbus_read_byte_data(client, ADM9240_REG_VID_FAN_DIV); - data->fan_div[0] = (i >> 4) & 3; - data->fan_div[1] = (i >> 6) & 3; - data->vid = i & 0x0f; - data->vid |= (i2c_smbus_read_byte_data(client, - ADM9240_REG_VID4) & 1) << 4; - /* read analog out */ - data->aout = i2c_smbus_read_byte_data(client, - ADM9240_REG_ANALOG_OUT); +static const struct i2c_device_id adm9240_id[] = { + { "adm9240", adm9240 }, + { "ds1780", ds1780 }, + { "lm81", lm81 }, + { } +}; +MODULE_DEVICE_TABLE(i2c, adm9240_id); - data->last_updated_config = jiffies; - data->valid = 1; - } - mutex_unlock(&data->update_lock); - return data; -} +static struct i2c_driver adm9240_driver = { + .class = I2C_CLASS_HWMON, + .driver = { + .name = "adm9240", + }, + .probe = adm9240_probe, + .remove = adm9240_remove, + .id_table = adm9240_id, + .detect = adm9240_detect, + .address_list = normal_i2c, +}; module_i2c_driver(adm9240_driver); -- cgit v1.2.3