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SubjectRe: [PATCH] coretemp: fix junction temperature for Intel CE4100
Date
Hello,

On Saturday 25 December 2010 23:28:33 Yu, Fenghua wrote:
> > -----Original Message-----
> > From: Florian Fainelli [mailto:f.fainelli@gmail.com] On Behalf Of
> > Florian Fainelli
> > Sent: Tuesday, December 14, 2010 1:17 PM
> > To: linux-kernel@vger.kernel.org; Dirk Brandewie;
> > sodaville@linutronix.de; Yu, Fenghua
> > Subject: [PATCH] coretemp: fix junction temperature for Intel CE4100
> >
> > From: Florian Fainelli <ffainelli@freebox.fr>
> >
> > The Intel CE4100 System-on-a-Chip has a slightly higher junction
> > temperature
> > (110 degrees Celsius) than other Atom-based hardware.
> >
> > Cc: Dirk Brandewie <dirk.brandewie@gmail.com>
> > Cc: sodaville@linutronix.de
> > Cc: Fenghua Yu <fenghua.yu@intel.com>
> > Signed-off-by: Florian Fainelli <ffainelli@freebox.fr>
> > ---
> > diff --git a/drivers/hwmon/coretemp.c b/drivers/hwmon/coretemp.c
> > index 42de98d..e47b405 100644
> > --- a/drivers/hwmon/coretemp.c
> > +++ b/drivers/hwmon/coretemp.c
> > @@ -178,12 +178,23 @@ static int __devinit adjust_tjmax(struct
> > cpuinfo_x86 *c, u32 id, struct device *
> >
> > 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;
> > + if (host_bridge && host_bridge->vendor ==
> > PCI_VENDOR_ID_INTEL) {
> > + switch (host_bridge->device) {
> > + /* NM10 based nettop */
> > + case 0xa000:
> > + /* NM10 based netbook */
> > + case 0xa010:
> > + tjmax = 100000;
> > + break;
> > + /* IntelCE Sodaville (CE4100) */
> > + case 0x0708:
> > + tjmax = 110000;
> > + break;
> > + default:
> > + tjmax = 90000;
> > + break;
> > + }
> > + }
> >
> > pci_dev_put(host_bridge);
> >
> > }
>
> When host_bridge && host_bridge->vendor == PCI_VENDOR_ID_INTEL is not true,
> tjmax is not assigned to 90000. This is different from original code.

Whoops, I will post a second version of that patch.

>
> Could you add public spec URL or public spec name for 110 degrees C in your
> comments? People may get lost to find this info.

I will try to find a public documentation stating that, but that was in the SDK
we received and I could not find any public information about this yet.
--
Florian


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