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it87: No sysfs files for disabled fans
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it87: No sysfs files for disabled fans

Only create the fan attributes for enabled fan tachometers. Some
motherboards have a nice BIOS which only enables the fan inputs which
are wired to a fan header on the board. This makes the configuration
easier for the user.

Signed-off-by: Jean Delvare <khali@linux-fr.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
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Jean Delvare authored and Greg Kroah-Hartman committed Sep 28, 2006
1 parent 17d648b commit 9060f8b
Showing 1 changed file with 51 additions and 32 deletions.
83 changes: 51 additions & 32 deletions drivers/hwmon/it87.c
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Original file line number Diff line number Diff line change
Expand Up @@ -222,6 +222,7 @@ struct it87_data {
u8 in[9]; /* Register value */
u8 in_max[9]; /* Register value */
u8 in_min[9]; /* Register value */
u8 has_fan; /* Bitfield, fans enabled */
u16 fan[3]; /* Register values, possibly combined */
u16 fan_min[3]; /* Register values, possibly combined */
u8 temp[3]; /* Register value */
Expand Down Expand Up @@ -967,38 +968,51 @@ static int it87_detect(struct i2c_adapter *adapter, int address, int kind)
device_create_file(&new_client->dev, &sensor_dev_attr_temp2_type.dev_attr);
device_create_file(&new_client->dev, &sensor_dev_attr_temp3_type.dev_attr);

/* Do not create fan files for disabled fans */
if (data->type == it8716) { /* 16-bit tachometers */
device_create_file(&new_client->dev,
&sensor_dev_attr_fan1_input16.dev_attr);
device_create_file(&new_client->dev,
&sensor_dev_attr_fan2_input16.dev_attr);
device_create_file(&new_client->dev,
&sensor_dev_attr_fan3_input16.dev_attr);
device_create_file(&new_client->dev,
&sensor_dev_attr_fan1_min16.dev_attr);
device_create_file(&new_client->dev,
&sensor_dev_attr_fan2_min16.dev_attr);
device_create_file(&new_client->dev,
&sensor_dev_attr_fan3_min16.dev_attr);
if (data->has_fan & (1 << 0)) {
device_create_file(&new_client->dev,
&sensor_dev_attr_fan1_input16.dev_attr);
device_create_file(&new_client->dev,
&sensor_dev_attr_fan1_min16.dev_attr);
}
if (data->has_fan & (1 << 1)) {
device_create_file(&new_client->dev,
&sensor_dev_attr_fan2_input16.dev_attr);
device_create_file(&new_client->dev,
&sensor_dev_attr_fan2_min16.dev_attr);
}
if (data->has_fan & (1 << 2)) {
device_create_file(&new_client->dev,
&sensor_dev_attr_fan3_input16.dev_attr);
device_create_file(&new_client->dev,
&sensor_dev_attr_fan3_min16.dev_attr);
}
} else {
device_create_file(&new_client->dev,
&sensor_dev_attr_fan1_input.dev_attr);
device_create_file(&new_client->dev,
&sensor_dev_attr_fan2_input.dev_attr);
device_create_file(&new_client->dev,
&sensor_dev_attr_fan3_input.dev_attr);
device_create_file(&new_client->dev,
&sensor_dev_attr_fan1_min.dev_attr);
device_create_file(&new_client->dev,
&sensor_dev_attr_fan2_min.dev_attr);
device_create_file(&new_client->dev,
&sensor_dev_attr_fan3_min.dev_attr);
device_create_file(&new_client->dev,
&sensor_dev_attr_fan1_div.dev_attr);
device_create_file(&new_client->dev,
&sensor_dev_attr_fan2_div.dev_attr);
device_create_file(&new_client->dev,
&sensor_dev_attr_fan3_div.dev_attr);
if (data->has_fan & (1 << 0)) {
device_create_file(&new_client->dev,
&sensor_dev_attr_fan1_input.dev_attr);
device_create_file(&new_client->dev,
&sensor_dev_attr_fan1_min.dev_attr);
device_create_file(&new_client->dev,
&sensor_dev_attr_fan1_div.dev_attr);
}
if (data->has_fan & (1 << 1)) {
device_create_file(&new_client->dev,
&sensor_dev_attr_fan2_input.dev_attr);
device_create_file(&new_client->dev,
&sensor_dev_attr_fan2_min.dev_attr);
device_create_file(&new_client->dev,
&sensor_dev_attr_fan2_div.dev_attr);
}
if (data->has_fan & (1 << 2)) {
device_create_file(&new_client->dev,
&sensor_dev_attr_fan3_input.dev_attr);
device_create_file(&new_client->dev,
&sensor_dev_attr_fan3_min.dev_attr);
device_create_file(&new_client->dev,
&sensor_dev_attr_fan3_div.dev_attr);
}
}

device_create_file(&new_client->dev, &dev_attr_alarms);
Expand Down Expand Up @@ -1175,11 +1189,12 @@ static void it87_init_client(struct i2c_client *client, struct it87_data *data)
data->fan_main_ctrl |= 0x70;
it87_write_value(client, IT87_REG_FAN_MAIN_CTRL, data->fan_main_ctrl);
}
data->has_fan = (data->fan_main_ctrl >> 4) & 0x07;

/* Set tachometers to 16-bit mode if needed */
if (data->type == it8716) {
tmp = it87_read_value(client, IT87_REG_FAN_16BIT);
if ((tmp & 0x07) != 0x07) {
if (~tmp & 0x07 & data->has_fan) {
dev_dbg(&client->dev,
"Setting fan1-3 to 16-bit mode\n");
it87_write_value(client, IT87_REG_FAN_16BIT,
Expand Down Expand Up @@ -1244,6 +1259,10 @@ static struct it87_data *it87_update_device(struct device *dev)
data->in_max[8] = 255;

for (i = 0; i < 3; i++) {
/* Skip disabled fans */
if (!(data->has_fan & (1 << i)))
continue;

data->fan_min[i] =
it87_read_value(client, IT87_REG_FAN_MIN(i));
data->fan[i] = it87_read_value(client,
Expand All @@ -1266,7 +1285,7 @@ static struct it87_data *it87_update_device(struct device *dev)
}

/* Newer chips don't have clock dividers */
if (data->type != it8716) {
if ((data->has_fan & 0x07) && data->type != it8716) {
i = it87_read_value(client, IT87_REG_FAN_DIV);
data->fan_div[0] = i & 0x07;
data->fan_div[1] = (i >> 3) & 0x07;
Expand Down

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