aboutsummaryrefslogtreecommitdiff
diff options
context:
space:
mode:
authorJean Delvare <jdelvare@suse.de>2015-01-24 14:16:21 +0100
committerJean Delvare <jdelvare@suse.de>2015-01-24 14:16:21 +0100
commite3d982034dd74b32f621fcba7adeb77716fa0fb4 (patch)
tree99f2e1e28040114aba4901b2dc2c052c49d5c79f
parentb8d48ce9519b21021e5875dce1a69f2941b17d1e (diff)
downloadlinux-e3d982034dd74b32f621fcba7adeb77716fa0fb4.tar.gz
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.c9
1 files changed, 9 insertions, 0 deletions
diff --git a/drivers/hwmon/i5500_temp.c b/drivers/hwmon/i5500_temp.c
index fdcfa9fcf5c..fb84a0ecbba 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);