diff options
| author | Guenter Roeck <[email protected]> | 2011-06-30 06:54:05 -0700 |
|---|---|---|
| committer | Guenter Roeck <[email protected]> | 2011-07-01 15:56:06 -0700 |
| commit | 81ae68142a0483b3791cba99eab268859858f508 (patch) | |
| tree | fa52ff3ead009c455a0fb41ec4bd8567ecde714c | |
| parent | 3b33ca41227a54a78446fb0d7a6fdb9862f563db (diff) | |
hwmon: (pmbus) Improve fan detection
Some PMBus devices return no error when reading fan speed registers, but don't
really support fans. Strengthen fan detection by also checking if fan
configuration registers exist.
Signed-off-by: Guenter Roeck <[email protected]>
Reviewed-by: Robert Coulson <[email protected]>
Cc: stable.kernel.org # 2.6.39
| -rw-r--r-- | drivers/hwmon/pmbus.c | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/drivers/hwmon/pmbus.c b/drivers/hwmon/pmbus.c index 98e2e28899e2..b0ea00b75f17 100644 --- a/drivers/hwmon/pmbus.c +++ b/drivers/hwmon/pmbus.c @@ -47,12 +47,14 @@ static void pmbus_find_sensor_groups(struct i2c_client *client, if (info->func[0] && pmbus_check_byte_register(client, 0, PMBUS_STATUS_INPUT)) info->func[0] |= PMBUS_HAVE_STATUS_INPUT; - if (pmbus_check_word_register(client, 0, PMBUS_READ_FAN_SPEED_1)) { + if (pmbus_check_byte_register(client, 0, PMBUS_FAN_CONFIG_12) && + pmbus_check_word_register(client, 0, PMBUS_READ_FAN_SPEED_1)) { info->func[0] |= PMBUS_HAVE_FAN12; if (pmbus_check_byte_register(client, 0, PMBUS_STATUS_FAN_12)) info->func[0] |= PMBUS_HAVE_STATUS_FAN12; } - if (pmbus_check_word_register(client, 0, PMBUS_READ_FAN_SPEED_3)) { + if (pmbus_check_byte_register(client, 0, PMBUS_FAN_CONFIG_34) && + pmbus_check_word_register(client, 0, PMBUS_READ_FAN_SPEED_3)) { info->func[0] |= PMBUS_HAVE_FAN34; if (pmbus_check_byte_register(client, 0, PMBUS_STATUS_FAN_34)) info->func[0] |= PMBUS_HAVE_STATUS_FAN34; |