diff options
| author | Jean Delvare <jdelvare@suse.de> | 2015-01-24 14:16:21 +0100 |
|---|---|---|
| committer | Jean Delvare <jdelvare@suse.de> | 2015-01-24 14:16:21 +0100 |
| commit | e3d982034dd74b32f621fcba7adeb77716fa0fb4 (patch) | |
| tree | 99f2e1e28040114aba4901b2dc2c052c49d5c79f | |
| parent | b8d48ce9519b21021e5875dce1a69f2941b17d1e (diff) | |
hwmon: (i5500_temp) Don't bind to disabled sensors
On many motherboards, for an unknown reason, the thermal sensor seems
to be disabled and will return a constant temperature value of 36.5
degrees Celsius. Don't bind to the device in that case, so that we
don't report this bogus value to userspace.
Signed-off-by: Jean Delvare <jdelvare@suse.de>
Cc: Romain Dolbeau <romain@dolbeau.org>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
| -rw-r--r-- | drivers/hwmon/i5500_temp.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/drivers/hwmon/i5500_temp.c b/drivers/hwmon/i5500_temp.c index fdcfa9fcf5c4..fb84a0ecbbad 100644 --- a/drivers/hwmon/i5500_temp.c +++ b/drivers/hwmon/i5500_temp.c @@ -121,6 +121,8 @@ static int i5500_temp_probe(struct pci_dev *pdev, { int err; struct device *hwmon_dev; + u32 tstimer; + s8 tsfsc; err = pci_enable_device(pdev); if (err) { @@ -128,6 +130,13 @@ static int i5500_temp_probe(struct pci_dev *pdev, return err; } + pci_read_config_byte(pdev, REG_TSFSC, &tsfsc); + pci_read_config_dword(pdev, REG_TSTIMER, &tstimer); + if (tsfsc == 0x7F && tstimer == 0x07D30D40) { + dev_warn(&pdev->dev, "Sensor seems to be disabled\n"); + return -ENODEV; + } + hwmon_dev = devm_hwmon_device_register_with_groups(&pdev->dev, "intel5500", NULL, i5500_temp_groups); |