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authorJean Delvare <khali@linux-fr.org>2006-08-28 14:24:17 +0200
committerGreg Kroah-Hartman <gregkh@suse.de>2006-09-28 15:31:13 -0700
commit9060f8bdd0c40e31d2be388e59f2dbeea55988a2 (patch)
tree785b330c027326eac78cad5dcb224e4b2a949168 /drivers/hwmon/it87.c
parent17d648bf5786ba5b8cbf7cbd5cb18d3d8d2657ca (diff)
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it87: No sysfs files for disabled fans
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>
Diffstat (limited to 'drivers/hwmon/it87.c')
-rw-r--r--drivers/hwmon/it87.c83
1 files changed, 51 insertions, 32 deletions
diff --git a/drivers/hwmon/it87.c b/drivers/hwmon/it87.c
index e7f14e61d6f2..0317e441ca51 100644
--- a/drivers/hwmon/it87.c
+++ b/drivers/hwmon/it87.c
@@ -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 */
@@ -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);
@@ -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,
@@ -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,
@@ -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;