From 1fe63ab47a617ee95f562eaa7ddbbc59981ff8c6 Mon Sep 17 00:00:00 2001 From: Yong Wang Date: Sun, 10 Jan 2010 20:52:34 +0100 Subject: 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 Acked-by: Huaxu Wan Signed-off-by: Jean Delvare --- drivers/hwmon/coretemp.c | 16 ++++++++++++++-- 1 file changed, 14 insertions(+), 2 deletions(-) (limited to 'drivers/hwmon/coretemp.c') diff --git a/drivers/hwmon/coretemp.c b/drivers/hwmon/coretemp.c index caef39cda8c..2d7bceeed0b 100644 --- a/drivers/hwmon/coretemp.c +++ b/drivers/hwmon/coretemp.c @@ -33,6 +33,7 @@ #include #include #include +#include #include #include @@ -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)) { -- cgit v1.2.3-70-g09d2