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| author | Andreas Herrmann <andreas.herrmann3@amd.com> | 2009-01-15 22:27:47 +0100 |
|---|---|---|
| committer | Jean Delvare <khali@linux-fr.org> | 2009-01-15 22:27:47 +0100 |
| commit | 76ff08da34196cfa308fcd3552bb9ea20888e745 (patch) | |
| tree | da6e83ed71af4e13358400f5c1fb5b06eb19b206 /drivers/hwmon | |
| parent | a2e066bba2aad6583e3ff648bf28339d6c9f0898 (diff) | |
| download | linux-76ff08da34196cfa308fcd3552bb9ea20888e745.tar.gz linux-76ff08da34196cfa308fcd3552bb9ea20888e745.tar.bz2 linux-76ff08da34196cfa308fcd3552bb9ea20888e745.zip | |
hwmon: (k8temp) Fix temperature reporting for (most) K8 RevG CPUs
Current Temperature for K8 RevG desktop CPUs is a "normalized value"
which can be below ambient temperature.
As a consequence lots of RevG systems report temperatures like:
$ sensors
k8temp-pci-00c3
Adapter: PCI adapter
Core0 Temp: +17 C
Core0 Temp: +3 C
Core1 Temp: +21 C
Core1 Temp: +5 C
being quite below ambient temperature.
There are even reports of negative temperature values.
This patch corrects the temperature reporting of k8temp for
RevG desktop CPUs.
Cc: Rudolf Marek <r.marek@assembler.cz>
Signed-off-by: Andreas Herrmann <andreas.herrmann3@amd.com>
Signed-off-by: Jean Delvare <khali@linux-fr.org>
Diffstat (limited to 'drivers/hwmon')
| -rw-r--r-- | drivers/hwmon/k8temp.c | 17 |
1 files changed, 15 insertions, 2 deletions
diff --git a/drivers/hwmon/k8temp.c b/drivers/hwmon/k8temp.c index a6381bc9189c..1fe995111841 100644 --- a/drivers/hwmon/k8temp.c +++ b/drivers/hwmon/k8temp.c @@ -49,6 +49,7 @@ struct k8temp_data { u8 sensorsp; /* sensor presence bits - SEL_CORE & SEL_PLACE */ u32 temp[2][2]; /* core, place */ u8 swap_core_select; /* meaning of SEL_CORE is inverted */ + u32 temp_offset; }; static struct k8temp_data *k8temp_update_device(struct device *dev) @@ -116,13 +117,15 @@ static ssize_t show_temp(struct device *dev, to_sensor_dev_attr_2(devattr); int core = attr->nr; int place = attr->index; + int temp; struct k8temp_data *data = k8temp_update_device(dev); if (data->swap_core_select) core = core ? 0 : 1; - return sprintf(buf, "%d\n", - TEMP_FROM_REG(data->temp[core][place])); + temp = TEMP_FROM_REG(data->temp[core][place]) + data->temp_offset; + + return sprintf(buf, "%d\n", temp); } /* core, place */ @@ -176,6 +179,16 @@ static int __devinit k8temp_probe(struct pci_dev *pdev, "wrong - check erratum #141\n"); } + if ((model >= 0x69) && + !(model == 0xc1 || model == 0x6c || model == 0x7c)) { + /* + * RevG desktop CPUs (i.e. no socket S1G1 parts) + * need additional offset, otherwise reported + * temperature is below ambient temperature + */ + data->temp_offset = 21000; + } + break; } |