packages: kernel/kernel-atom-coretemp.patch (NEW) - reading temperature sen...

[charles]

Author: charles                      Date: Sun May  3 11:03:54 2009 GMT
Module: packages                      Tag: HEAD
---- Log message:
- reading temperature sensor embedded inside Intel Atom

---- Files affected:
packages/kernel:
   kernel-atom-coretemp.patch (NONE -> 1.1)  (NEW)

---- Diffs:

================================================================
Index: packages/kernel/kernel-atom-coretemp.patch
diff -u /dev/null packages/kernel/kernel-atom-coretemp.patch:1.1
--- /dev/null	Sun May  3 13:03:54 2009
+++ packages/kernel/kernel-atom-coretemp.patch	Sun May  3 13:03:48 2009
@@ -0,0 +1,89 @@
+Index: linux-2.6.27-rc2/Documentation/hwmon/coretemp
+===================================================================
+--- linux-2.6.27-rc2.orig/Documentation/hwmon/coretemp	2008-08-10 20:33:20.355228221 +0200
++++ linux-2.6.27-rc2/Documentation/hwmon/coretemp	2008-08-09 20:09:42.000000000 +0200
+@@ -4,7 +4,7 @@
+ Supported chips:
+   * All Intel Core family
+     Prefix: 'coretemp'
+-    CPUID: family 0x6, models 0xe, 0xf, 0x16, 0x17
++    CPUID: family 0x6, models 0xe, 0xf, 0x16, 0x17, 0x1c
+     Datasheet: Intel 64 and IA-32 Architectures Software Developer's Manual
+                Volume 3A: System Programming Guide
+                http://softwarecommunity.intel.com/Wiki/Mobility/720.htm
+@@ -14,10 +14,11 @@
+ Description
+ -----------
+ 
+-This driver permits reading temperature sensor embedded inside Intel Core CPU.
+-Temperature is measured in degrees Celsius and measurement resolution is
+-1 degree C. Valid temperatures are from 0 to TjMax degrees C, because
+-the actual value of temperature register is in fact a delta from TjMax.
++This driver permits reading temperature sensor embedded inside Intel
++Core  and Intel Atom CPUs. Temperature is measured in degrees Celsius
++and measurement resolution is 1 degree C. Valid temperatures are from 0
++to TjMax degrees C, because the actual value of temperature register is
++in fact a delta from TjMax.
+ 
+ Temperature known as TjMax is the maximum junction temperature of processor.
+ Intel defines this temperature as 85C or 100C. At this temperature, protection
+@@ -35,4 +36,5 @@
+ 
+ The TjMax temperature is set to 85 degrees C if undocumented model specific
+ register (UMSR) 0xee has bit 30 set. If not the TjMax is 100 degrees C as
+-(sometimes) documented in processor datasheet.
++(sometimes) documented in processor datasheet. The Intel Atom has TjMax 95C
++as per the specification.
+Index: linux-2.6.27-rc2/drivers/hwmon/coretemp.c
+===================================================================
+--- linux-2.6.27/drivers/hwmon/coretemp.c.orig	2008-10-10 00:13:53.000000000 +0200
++++ linux-2.6.27/drivers/hwmon/coretemp.c	2009-03-23 10:05:12.000000000 +0100
+@@ -1,7 +1,7 @@
+ /*
+  * coretemp.c - Linux kernel module for hardware monitoring
+  *
+- * Copyright (C) 2007 Rudolf Marek <r.marek at assembler.cz>
++ * Copyright (C) 2007, 2008 Rudolf Marek <r.marek at assembler.cz>
+  *
+  * Inspired from many hwmon drivers
+  *
+@@ -244,8 +244,14 @@
+ 		}
+ 	}
+ 
+-	data->tjmax = adjust_tjmax(c, data->id, &pdev->dev);
+-	platform_set_drvdata(pdev, data);
++	/* Intel Atom has only fixed TjMax at 95C */
++
++	if (c->x86_model == 0x1c) {
++		data->tjmax = 95000;
++	} else {
++		/* Adjust the TjMax for the rest of Core2 family */
++		data->tjmax = adjust_tjmax(c, data->id, &pdev->dev);
++	}
+ 
+ 	/* read the still undocumented IA32_TEMPERATURE_TARGET it exists
+ 	   on older CPUs but not in this register */
+@@ -265,6 +271,8 @@
+ 		}
+ 	}
+ 
++	platform_set_drvdata(pdev, data);
++
+ 	if ((err = sysfs_create_group(&pdev->dev.kobj, &coretemp_group)))
+ 		goto exit_dev;
+ 
+@@ -413,11 +421,11 @@
+ 	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) ||
+-			(c->x86_model == 0x1A))) {
++			(c->x86_model == 0x1a) || (c->x86_model == 0x1c))) {
+ 
+ 			/* supported CPU not found, but report the unknown
+ 			   family 6 CPU */
================================================================