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| author | Yong Wang <yong.y.wang@linux.intel.com> | 2010-01-10 20:52:34 +0100 |
|---|---|---|
| committer | Jean Delvare <khali@linux-fr.org> | 2010-01-10 20:52:34 +0100 |
| commit | 1fe63ab47a617ee95f562eaa7ddbbc59981ff8c6 (patch) | |
| tree | 45b7d542d9a9b25bb9416f92f748c336d9aae40f /drivers/hwmon | |
| parent | c5114a1cd6d84b2b3144c1c3e093c80ca6c30f47 (diff) | |
| download | lwn-1fe63ab47a617ee95f562eaa7ddbbc59981ff8c6.tar.gz lwn-1fe63ab47a617ee95f562eaa7ddbbc59981ff8c6.zip | |
hwmon: (coretemp) Fix TjMax for Atom N450/D410/D510 CPUs
The max junction temperature of Atom N450/D410/D510 CPUs is 100 degrees
Celsius. Since these CPUs are always coupled with Intel NM10 chipset in
one package, the best way to verify whether an Atom CPU is N450/D410/D510
is to check the host bridge device.
Signed-off-by: Yong Wang <yong.y.wang@intel.com>
Acked-by: Huaxu Wan <huaxu.wan@intel.com>
Signed-off-by: Jean Delvare <khali@linux-fr.org>
Diffstat (limited to 'drivers/hwmon')
| -rw-r--r-- | drivers/hwmon/Kconfig | 2 | ||||
| -rw-r--r-- | drivers/hwmon/coretemp.c | 16 |
2 files changed, 15 insertions, 3 deletions
diff --git a/drivers/hwmon/Kconfig b/drivers/hwmon/Kconfig index 46c3c566307e..435ae72fc47a 100644 --- a/drivers/hwmon/Kconfig +++ b/drivers/hwmon/Kconfig @@ -392,7 +392,7 @@ config SENSORS_GL520SM config SENSORS_CORETEMP tristate "Intel Core/Core2/Atom temperature sensor" - depends on X86 && EXPERIMENTAL + depends on X86 && PCI && EXPERIMENTAL help If you say yes here you get support for the temperature sensor inside your CPU. Most of the family 6 CPUs diff --git a/drivers/hwmon/coretemp.c b/drivers/hwmon/coretemp.c index caef39cda8c8..2d7bceeed0bc 100644 --- a/drivers/hwmon/coretemp.c +++ b/drivers/hwmon/coretemp.c @@ -33,6 +33,7 @@ #include <linux/list.h> #include <linux/platform_device.h> #include <linux/cpu.h> +#include <linux/pci.h> #include <asm/msr.h> #include <asm/processor.h> @@ -161,6 +162,7 @@ static int __devinit adjust_tjmax(struct cpuinfo_x86 *c, u32 id, struct device * int usemsr_ee = 1; int err; u32 eax, edx; + struct pci_dev *host_bridge; /* Early chips have no MSR for TjMax */ @@ -168,11 +170,21 @@ static int __devinit adjust_tjmax(struct cpuinfo_x86 *c, u32 id, struct device * usemsr_ee = 0; } - /* Atoms seems to have TjMax at 90C */ + /* Atom CPUs */ if (c->x86_model == 0x1c) { usemsr_ee = 0; - tjmax = 90000; + + host_bridge = pci_get_bus_and_slot(0, PCI_DEVFN(0, 0)); + + if (host_bridge && host_bridge->vendor == PCI_VENDOR_ID_INTEL + && (host_bridge->device == 0xa000 /* NM10 based nettop */ + || host_bridge->device == 0xa010)) /* NM10 based netbook */ + tjmax = 100000; + else + tjmax = 90000; + + pci_dev_put(host_bridge); } if ((c->x86_model > 0xe) && (usemsr_ee)) { |