Commit 1fe63ab4 authored by Yong Wang's avatar Yong Wang Committed by Jean Delvare
Browse files

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: default avatarYong Wang <yong.y.wang@intel.com>
Acked-by: default avatarHuaxu Wan <huaxu.wan@intel.com>
Signed-off-by: default avatarJean Delvare <khali@linux-fr.org>
parent c5114a1c

drivers/hwmon/Kconfig

+1 −1
Original line number Diff line number Diff line
@@ -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

drivers/hwmon/coretemp.c

+14 −2
Original line number Diff line number Diff line
@@ -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;



		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)) {

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