korg/linux
0
0
Fork 0
mirror of https://mirrors.bfsu.edu.cn/git/linux.git synced 2024-09-21 20:22:13 +08:00
Code Issues Packages Projects Releases Wiki Activity

hwmon: (coretemp) Fix TjMax for Atom N450/D410/D510 CPUs

Browse Source 
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>
This commit is contained in:
Yong Wang 2010-01-10 20:52:34 +01:00 committed by Jean Delvare
parent c5114a1cd6
commit 1fe63ab47a
2 changed files with 15 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
drivers/hwmon/Kconfig
View File

@ -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

16
drivers/hwmon/coretemp.c
View File

@ -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)) {