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| author | Rudolf Marek <r.marek@assembler.cz> | 2009-09-23 22:59:42 +0200 |
|---|---|---|
| committer | Jean Delvare <khali@linux-fr.org> | 2009-09-23 22:59:42 +0200 |
| commit | 708a62bcd5f699756bae81491e64648fbf19e2a4 (patch) | |
| tree | 4d56e0d672bcdfe8b1f46980f9e7374e7e729307 /drivers/hwmon/coretemp.c | |
| parent | 91f17e02a224dc649eaffc8e0bca6db85efb9cd7 (diff) | |
| download | op-kernel-dev-708a62bcd5f699756bae81491e64648fbf19e2a4.zip op-kernel-dev-708a62bcd5f699756bae81491e64648fbf19e2a4.tar.gz | |
hwmon: (coretemp) Fix Atom CPUs support
Fix Atom CPUs support. Intel documents TjMax at 90 degrees C but
some Atoms may have 125 degrees C (this is undocumented speculation).
Signed-off-by: Rudolf Marek <r.marek@assembler.cz>
Cc: Huaxu Wan <huaxu.wan@linux.intel.com>
Cc: Kent Liu <kent.liu@linux.intel.com>
Signed-off-by: Jean Delvare <khali@linux-fr.org>
Diffstat (limited to 'drivers/hwmon/coretemp.c')
| -rw-r--r-- | drivers/hwmon/coretemp.c | 29 |
1 files changed, 19 insertions, 10 deletions
diff --git a/drivers/hwmon/coretemp.c b/drivers/hwmon/coretemp.c index 972cf4b..4c15ed7 100644 --- a/drivers/hwmon/coretemp.c +++ b/drivers/hwmon/coretemp.c @@ -157,17 +157,24 @@ static int __devinit adjust_tjmax(struct cpuinfo_x86 *c, u32 id, struct device * /* The 100C is default for both mobile and non mobile CPUs */ int tjmax = 100000; - int ismobile = 1; + int usemsr_ee = 1; int err; u32 eax, edx; /* Early chips have no MSR for TjMax */ if ((c->x86_model == 0xf) && (c->x86_mask < 4)) { - ismobile = 0; + usemsr_ee = 0; } - if ((c->x86_model > 0xe) && (ismobile)) { + /* Atoms seems to have TjMax at 90C */ + + if (c->x86_model == 0x1c) { + usemsr_ee = 0; + tjmax = 90000; + } + + if ((c->x86_model > 0xe) && (usemsr_ee)) { /* Now we can detect the mobile CPU using Intel provided table http://softwarecommunity.intel.com/Wiki/Mobility/720.htm @@ -179,13 +186,13 @@ static int __devinit adjust_tjmax(struct cpuinfo_x86 *c, u32 id, struct device * dev_warn(dev, "Unable to access MSR 0x17, assuming desktop" " CPU\n"); - ismobile = 0; + usemsr_ee = 0; } else if (!(eax & 0x10000000)) { - ismobile = 0; + usemsr_ee = 0; } } - if (ismobile || c->x86_model == 0x1c) { + if (usemsr_ee) { err = rdmsr_safe_on_cpu(id, 0xee, &eax, &edx); if (err) { @@ -195,7 +202,9 @@ static int __devinit adjust_tjmax(struct cpuinfo_x86 *c, u32 id, struct device * } else if (eax & 0x40000000) { tjmax = 85000; } - } else { + /* if we dont use msr EE it means we are desktop CPU (with exeception + of Atom) */ + } else if (tjmax == 100000) { dev_warn(dev, "Using relative temperature scale!\n"); } @@ -248,9 +257,9 @@ static int __devinit coretemp_probe(struct platform_device *pdev) platform_set_drvdata(pdev, data); /* read the still undocumented IA32_TEMPERATURE_TARGET it exists - on older CPUs but not in this register */ + on older CPUs but not in this register, Atoms don't have it either */ - if (c->x86_model > 0xe) { + if ((c->x86_model > 0xe) && (c->x86_model != 0x1c)) { err = rdmsr_safe_on_cpu(data->id, 0x1a2, &eax, &edx); if (err) { dev_warn(&pdev->dev, "Unable to read" @@ -413,7 +422,7 @@ static int __init coretemp_init(void) for_each_online_cpu(i) { struct cpuinfo_x86 *c = &cpu_data(i); - /* check if family 6, models 0xe, 0xf, 0x16, 0x17, 0x1A */ + /* check if family 6, models 0xe, 0xf, 0x16, 0x17, 0x1A, 0x1c */ if ((c->cpuid_level < 0) || (c->x86 != 0x6) || !((c->x86_model == 0xe) || (c->x86_model == 0xf) || (c->x86_model == 0x16) || (c->x86_model == 0x17) || |
