2 * coretemp.c - Linux kernel module for hardware monitoring
4 * Copyright (C) 2007 Rudolf Marek <r.marek@assembler.cz>
6 * Inspired from many hwmon drivers
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; version 2 of the License.
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
23 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
25 #include <linux/module.h>
26 #include <linux/init.h>
27 #include <linux/slab.h>
28 #include <linux/jiffies.h>
29 #include <linux/hwmon.h>
30 #include <linux/sysfs.h>
31 #include <linux/hwmon-sysfs.h>
32 #include <linux/err.h>
33 #include <linux/mutex.h>
34 #include <linux/list.h>
35 #include <linux/platform_device.h>
36 #include <linux/cpu.h>
37 #include <linux/pci.h>
38 #include <linux/smp.h>
39 #include <linux/moduleparam.h>
41 #include <asm/processor.h>
42 #include <asm/cpu_device_id.h>
44 #define DRVNAME "coretemp"
47 * force_tjmax only matters when TjMax can't be read from the CPU itself.
48 * When set, it replaces the driver's suboptimal heuristic.
50 static int force_tjmax
;
51 module_param_named(tjmax
, force_tjmax
, int, 0444);
52 MODULE_PARM_DESC(tjmax
, "TjMax value in degrees Celsius");
54 #define BASE_SYSFS_ATTR_NO 2 /* Sysfs Base attr no for coretemp */
55 #define NUM_REAL_CORES 32 /* Number of Real cores per cpu */
56 #define CORETEMP_NAME_LENGTH 17 /* String Length of attrs */
57 #define MAX_CORE_ATTRS 4 /* Maximum no of basic attrs */
58 #define TOTAL_ATTRS (MAX_CORE_ATTRS + 1)
59 #define MAX_CORE_DATA (NUM_REAL_CORES + BASE_SYSFS_ATTR_NO)
61 #define TO_PHYS_ID(cpu) (cpu_data(cpu).phys_proc_id)
62 #define TO_CORE_ID(cpu) (cpu_data(cpu).cpu_core_id)
63 #define TO_ATTR_NO(cpu) (TO_CORE_ID(cpu) + BASE_SYSFS_ATTR_NO)
66 #define for_each_sibling(i, cpu) for_each_cpu(i, cpu_sibling_mask(cpu))
68 #define for_each_sibling(i, cpu) for (i = 0; false; )
72 * Per-Core Temperature Data
73 * @last_updated: The time when the current temperature value was updated
74 * earlier (in jiffies).
75 * @cpu_core_id: The CPU Core from which temperature values should be read
76 * This value is passed as "id" field to rdmsr/wrmsr functions.
77 * @status_reg: One of IA32_THERM_STATUS or IA32_PACKAGE_THERM_STATUS,
78 * from where the temperature values should be read.
79 * @attr_size: Total number of pre-core attrs displayed in the sysfs.
80 * @is_pkg_data: If this is 1, the temp_data holds pkgtemp data.
81 * Otherwise, temp_data holds coretemp data.
82 * @valid: If this is 1, the current temperature is valid.
88 unsigned long last_updated
;
95 struct sensor_device_attribute sd_attrs
[TOTAL_ATTRS
];
96 char attr_name
[TOTAL_ATTRS
][CORETEMP_NAME_LENGTH
];
97 struct mutex update_lock
;
100 /* Platform Data per Physical CPU */
101 struct platform_data
{
102 struct device
*hwmon_dev
;
104 struct temp_data
*core_data
[MAX_CORE_DATA
];
105 struct device_attribute name_attr
;
109 struct list_head list
;
110 struct platform_device
*pdev
;
114 static LIST_HEAD(pdev_list
);
115 static DEFINE_MUTEX(pdev_list_mutex
);
117 static ssize_t
show_name(struct device
*dev
,
118 struct device_attribute
*devattr
, char *buf
)
120 return sprintf(buf
, "%s\n", DRVNAME
);
123 static ssize_t
show_label(struct device
*dev
,
124 struct device_attribute
*devattr
, char *buf
)
126 struct sensor_device_attribute
*attr
= to_sensor_dev_attr(devattr
);
127 struct platform_data
*pdata
= dev_get_drvdata(dev
);
128 struct temp_data
*tdata
= pdata
->core_data
[attr
->index
];
130 if (tdata
->is_pkg_data
)
131 return sprintf(buf
, "Physical id %u\n", pdata
->phys_proc_id
);
133 return sprintf(buf
, "Core %u\n", tdata
->cpu_core_id
);
136 static ssize_t
show_crit_alarm(struct device
*dev
,
137 struct device_attribute
*devattr
, char *buf
)
140 struct sensor_device_attribute
*attr
= to_sensor_dev_attr(devattr
);
141 struct platform_data
*pdata
= dev_get_drvdata(dev
);
142 struct temp_data
*tdata
= pdata
->core_data
[attr
->index
];
144 rdmsr_on_cpu(tdata
->cpu
, tdata
->status_reg
, &eax
, &edx
);
146 return sprintf(buf
, "%d\n", (eax
>> 5) & 1);
149 static ssize_t
show_tjmax(struct device
*dev
,
150 struct device_attribute
*devattr
, char *buf
)
152 struct sensor_device_attribute
*attr
= to_sensor_dev_attr(devattr
);
153 struct platform_data
*pdata
= dev_get_drvdata(dev
);
155 return sprintf(buf
, "%d\n", pdata
->core_data
[attr
->index
]->tjmax
);
158 static ssize_t
show_ttarget(struct device
*dev
,
159 struct device_attribute
*devattr
, char *buf
)
161 struct sensor_device_attribute
*attr
= to_sensor_dev_attr(devattr
);
162 struct platform_data
*pdata
= dev_get_drvdata(dev
);
164 return sprintf(buf
, "%d\n", pdata
->core_data
[attr
->index
]->ttarget
);
167 static ssize_t
show_temp(struct device
*dev
,
168 struct device_attribute
*devattr
, char *buf
)
171 struct sensor_device_attribute
*attr
= to_sensor_dev_attr(devattr
);
172 struct platform_data
*pdata
= dev_get_drvdata(dev
);
173 struct temp_data
*tdata
= pdata
->core_data
[attr
->index
];
175 mutex_lock(&tdata
->update_lock
);
177 /* Check whether the time interval has elapsed */
178 if (!tdata
->valid
|| time_after(jiffies
, tdata
->last_updated
+ HZ
)) {
179 rdmsr_on_cpu(tdata
->cpu
, tdata
->status_reg
, &eax
, &edx
);
181 /* Check whether the data is valid */
182 if (eax
& 0x80000000) {
183 tdata
->temp
= tdata
->tjmax
-
184 ((eax
>> 16) & 0x7f) * 1000;
187 tdata
->last_updated
= jiffies
;
190 mutex_unlock(&tdata
->update_lock
);
191 return tdata
->valid
? sprintf(buf
, "%d\n", tdata
->temp
) : -EAGAIN
;
194 static int __cpuinit
adjust_tjmax(struct cpuinfo_x86
*c
, u32 id
,
197 /* The 100C is default for both mobile and non mobile CPUs */
200 int tjmax_ee
= 85000;
204 struct pci_dev
*host_bridge
;
206 /* Early chips have no MSR for TjMax */
208 if (c
->x86_model
== 0xf && c
->x86_mask
< 4)
213 if (c
->x86_model
== 0x1c) {
216 host_bridge
= pci_get_bus_and_slot(0, PCI_DEVFN(0, 0));
218 if (host_bridge
&& host_bridge
->vendor
== PCI_VENDOR_ID_INTEL
219 && (host_bridge
->device
== 0xa000 /* NM10 based nettop */
220 || host_bridge
->device
== 0xa010)) /* NM10 based netbook */
225 pci_dev_put(host_bridge
);
228 if (c
->x86_model
> 0xe && usemsr_ee
) {
232 * Now we can detect the mobile CPU using Intel provided table
233 * http://softwarecommunity.intel.com/Wiki/Mobility/720.htm
234 * For Core2 cores, check MSR 0x17, bit 28 1 = Mobile CPU
236 err
= rdmsr_safe_on_cpu(id
, 0x17, &eax
, &edx
);
239 "Unable to access MSR 0x17, assuming desktop"
242 } else if (c
->x86_model
< 0x17 && !(eax
& 0x10000000)) {
244 * Trust bit 28 up to Penryn, I could not find any
245 * documentation on that; if you happen to know
246 * someone at Intel please ask
250 /* Platform ID bits 52:50 (EDX starts at bit 32) */
251 platform_id
= (edx
>> 18) & 0x7;
254 * Mobile Penryn CPU seems to be platform ID 7 or 5
257 if (c
->x86_model
== 0x17 &&
258 (platform_id
== 5 || platform_id
== 7)) {
260 * If MSR EE bit is set, set it to 90 degrees C,
261 * otherwise 105 degrees C
270 err
= rdmsr_safe_on_cpu(id
, 0xee, &eax
, &edx
);
273 "Unable to access MSR 0xEE, for Tjmax, left"
275 } else if (eax
& 0x40000000) {
278 } else if (tjmax
== 100000) {
280 * If we don't use msr EE it means we are desktop CPU
281 * (with exeception of Atom)
283 dev_warn(dev
, "Using relative temperature scale!\n");
289 static int __cpuinit
get_tjmax(struct cpuinfo_x86
*c
, u32 id
,
297 * A new feature of current Intel(R) processors, the
298 * IA32_TEMPERATURE_TARGET contains the TjMax value
300 err
= rdmsr_safe_on_cpu(id
, MSR_IA32_TEMPERATURE_TARGET
, &eax
, &edx
);
302 if (c
->x86_model
> 0xe && c
->x86_model
!= 0x1c)
303 dev_warn(dev
, "Unable to read TjMax from CPU %u\n", id
);
305 val
= (eax
>> 16) & 0xff;
307 * If the TjMax is not plausible, an assumption
311 dev_dbg(dev
, "TjMax is %d degrees C\n", val
);
317 dev_notice(dev
, "TjMax forced to %d degrees C by user\n",
319 return force_tjmax
* 1000;
323 * An assumption is made for early CPUs and unreadable MSR.
324 * NOTE: the calculated value may not be correct.
326 return adjust_tjmax(c
, id
, dev
);
329 static int __devinit
create_name_attr(struct platform_data
*pdata
,
332 sysfs_attr_init(&pdata
->name_attr
.attr
);
333 pdata
->name_attr
.attr
.name
= "name";
334 pdata
->name_attr
.attr
.mode
= S_IRUGO
;
335 pdata
->name_attr
.show
= show_name
;
336 return device_create_file(dev
, &pdata
->name_attr
);
339 static int __cpuinit
create_core_attrs(struct temp_data
*tdata
,
340 struct device
*dev
, int attr_no
)
343 static ssize_t (*const rd_ptr
[TOTAL_ATTRS
]) (struct device
*dev
,
344 struct device_attribute
*devattr
, char *buf
) = {
345 show_label
, show_crit_alarm
, show_temp
, show_tjmax
,
347 static const char *const names
[TOTAL_ATTRS
] = {
348 "temp%d_label", "temp%d_crit_alarm",
349 "temp%d_input", "temp%d_crit",
352 for (i
= 0; i
< tdata
->attr_size
; i
++) {
353 snprintf(tdata
->attr_name
[i
], CORETEMP_NAME_LENGTH
, names
[i
],
355 sysfs_attr_init(&tdata
->sd_attrs
[i
].dev_attr
.attr
);
356 tdata
->sd_attrs
[i
].dev_attr
.attr
.name
= tdata
->attr_name
[i
];
357 tdata
->sd_attrs
[i
].dev_attr
.attr
.mode
= S_IRUGO
;
358 tdata
->sd_attrs
[i
].dev_attr
.show
= rd_ptr
[i
];
359 tdata
->sd_attrs
[i
].index
= attr_no
;
360 err
= device_create_file(dev
, &tdata
->sd_attrs
[i
].dev_attr
);
368 device_remove_file(dev
, &tdata
->sd_attrs
[i
].dev_attr
);
373 static int __cpuinit
chk_ucode_version(unsigned int cpu
)
375 struct cpuinfo_x86
*c
= &cpu_data(cpu
);
378 * Check if we have problem with errata AE18 of Core processors:
379 * Readings might stop update when processor visited too deep sleep,
380 * fixed for stepping D0 (6EC).
382 if (c
->x86_model
== 0xe && c
->x86_mask
< 0xc && c
->microcode
< 0x39) {
383 pr_err("Errata AE18 not fixed, update BIOS or "
384 "microcode of the CPU!\n");
390 static struct platform_device __cpuinit
*coretemp_get_pdev(unsigned int cpu
)
392 u16 phys_proc_id
= TO_PHYS_ID(cpu
);
393 struct pdev_entry
*p
;
395 mutex_lock(&pdev_list_mutex
);
397 list_for_each_entry(p
, &pdev_list
, list
)
398 if (p
->phys_proc_id
== phys_proc_id
) {
399 mutex_unlock(&pdev_list_mutex
);
403 mutex_unlock(&pdev_list_mutex
);
407 static struct temp_data __cpuinit
*init_temp_data(unsigned int cpu
,
410 struct temp_data
*tdata
;
412 tdata
= kzalloc(sizeof(struct temp_data
), GFP_KERNEL
);
416 tdata
->status_reg
= pkg_flag
? MSR_IA32_PACKAGE_THERM_STATUS
:
417 MSR_IA32_THERM_STATUS
;
418 tdata
->is_pkg_data
= pkg_flag
;
420 tdata
->cpu_core_id
= TO_CORE_ID(cpu
);
421 tdata
->attr_size
= MAX_CORE_ATTRS
;
422 mutex_init(&tdata
->update_lock
);
426 static int __cpuinit
create_core_data(struct platform_device
*pdev
,
427 unsigned int cpu
, int pkg_flag
)
429 struct temp_data
*tdata
;
430 struct platform_data
*pdata
= platform_get_drvdata(pdev
);
431 struct cpuinfo_x86
*c
= &cpu_data(cpu
);
436 * Find attr number for sysfs:
437 * We map the attr number to core id of the CPU
438 * The attr number is always core id + 2
439 * The Pkgtemp will always show up as temp1_*, if available
441 attr_no
= pkg_flag
? 1 : TO_ATTR_NO(cpu
);
443 if (attr_no
> MAX_CORE_DATA
- 1)
447 * Provide a single set of attributes for all HT siblings of a core
448 * to avoid duplicate sensors (the processor ID and core ID of all
449 * HT siblings of a core are the same).
450 * Skip if a HT sibling of this core is already registered.
451 * This is not an error.
453 if (pdata
->core_data
[attr_no
] != NULL
)
456 tdata
= init_temp_data(cpu
, pkg_flag
);
460 /* Test if we can access the status register */
461 err
= rdmsr_safe_on_cpu(cpu
, tdata
->status_reg
, &eax
, &edx
);
465 /* We can access status register. Get Critical Temperature */
466 tdata
->tjmax
= get_tjmax(c
, cpu
, &pdev
->dev
);
469 * Read the still undocumented bits 8:15 of IA32_TEMPERATURE_TARGET.
470 * The target temperature is available on older CPUs but not in this
471 * register. Atoms don't have the register at all.
473 if (c
->x86_model
> 0xe && c
->x86_model
!= 0x1c) {
474 err
= rdmsr_safe_on_cpu(cpu
, MSR_IA32_TEMPERATURE_TARGET
,
478 = tdata
->tjmax
- ((eax
>> 8) & 0xff) * 1000;
483 pdata
->core_data
[attr_no
] = tdata
;
485 /* Create sysfs interfaces */
486 err
= create_core_attrs(tdata
, &pdev
->dev
, attr_no
);
492 pdata
->core_data
[attr_no
] = NULL
;
497 static void __cpuinit
coretemp_add_core(unsigned int cpu
, int pkg_flag
)
499 struct platform_device
*pdev
= coretemp_get_pdev(cpu
);
505 err
= create_core_data(pdev
, cpu
, pkg_flag
);
507 dev_err(&pdev
->dev
, "Adding Core %u failed\n", cpu
);
510 static void coretemp_remove_core(struct platform_data
*pdata
,
511 struct device
*dev
, int indx
)
514 struct temp_data
*tdata
= pdata
->core_data
[indx
];
516 /* Remove the sysfs attributes */
517 for (i
= 0; i
< tdata
->attr_size
; i
++)
518 device_remove_file(dev
, &tdata
->sd_attrs
[i
].dev_attr
);
520 kfree(pdata
->core_data
[indx
]);
521 pdata
->core_data
[indx
] = NULL
;
524 static int __devinit
coretemp_probe(struct platform_device
*pdev
)
526 struct platform_data
*pdata
;
529 /* Initialize the per-package data structures */
530 pdata
= kzalloc(sizeof(struct platform_data
), GFP_KERNEL
);
534 err
= create_name_attr(pdata
, &pdev
->dev
);
538 pdata
->phys_proc_id
= pdev
->id
;
539 platform_set_drvdata(pdev
, pdata
);
541 pdata
->hwmon_dev
= hwmon_device_register(&pdev
->dev
);
542 if (IS_ERR(pdata
->hwmon_dev
)) {
543 err
= PTR_ERR(pdata
->hwmon_dev
);
544 dev_err(&pdev
->dev
, "Class registration failed (%d)\n", err
);
550 device_remove_file(&pdev
->dev
, &pdata
->name_attr
);
551 platform_set_drvdata(pdev
, NULL
);
557 static int __devexit
coretemp_remove(struct platform_device
*pdev
)
559 struct platform_data
*pdata
= platform_get_drvdata(pdev
);
562 for (i
= MAX_CORE_DATA
- 1; i
>= 0; --i
)
563 if (pdata
->core_data
[i
])
564 coretemp_remove_core(pdata
, &pdev
->dev
, i
);
566 device_remove_file(&pdev
->dev
, &pdata
->name_attr
);
567 hwmon_device_unregister(pdata
->hwmon_dev
);
568 platform_set_drvdata(pdev
, NULL
);
573 static struct platform_driver coretemp_driver
= {
575 .owner
= THIS_MODULE
,
578 .probe
= coretemp_probe
,
579 .remove
= __devexit_p(coretemp_remove
),
582 static int __cpuinit
coretemp_device_add(unsigned int cpu
)
585 struct platform_device
*pdev
;
586 struct pdev_entry
*pdev_entry
;
588 mutex_lock(&pdev_list_mutex
);
590 pdev
= platform_device_alloc(DRVNAME
, TO_PHYS_ID(cpu
));
593 pr_err("Device allocation failed\n");
597 pdev_entry
= kzalloc(sizeof(struct pdev_entry
), GFP_KERNEL
);
600 goto exit_device_put
;
603 err
= platform_device_add(pdev
);
605 pr_err("Device addition failed (%d)\n", err
);
606 goto exit_device_free
;
609 pdev_entry
->pdev
= pdev
;
610 pdev_entry
->phys_proc_id
= pdev
->id
;
612 list_add_tail(&pdev_entry
->list
, &pdev_list
);
613 mutex_unlock(&pdev_list_mutex
);
620 platform_device_put(pdev
);
622 mutex_unlock(&pdev_list_mutex
);
626 static void __cpuinit
coretemp_device_remove(unsigned int cpu
)
628 struct pdev_entry
*p
, *n
;
629 u16 phys_proc_id
= TO_PHYS_ID(cpu
);
631 mutex_lock(&pdev_list_mutex
);
632 list_for_each_entry_safe(p
, n
, &pdev_list
, list
) {
633 if (p
->phys_proc_id
!= phys_proc_id
)
635 platform_device_unregister(p
->pdev
);
639 mutex_unlock(&pdev_list_mutex
);
642 static bool __cpuinit
is_any_core_online(struct platform_data
*pdata
)
646 /* Find online cores, except pkgtemp data */
647 for (i
= MAX_CORE_DATA
- 1; i
>= 0; --i
) {
648 if (pdata
->core_data
[i
] &&
649 !pdata
->core_data
[i
]->is_pkg_data
) {
656 static void __cpuinit
get_core_online(unsigned int cpu
)
658 struct cpuinfo_x86
*c
= &cpu_data(cpu
);
659 struct platform_device
*pdev
= coretemp_get_pdev(cpu
);
663 * CPUID.06H.EAX[0] indicates whether the CPU has thermal
664 * sensors. We check this bit only, all the early CPUs
665 * without thermal sensors will be filtered out.
667 if (!cpu_has(c
, X86_FEATURE_DTS
))
671 /* Check the microcode version of the CPU */
672 if (chk_ucode_version(cpu
))
676 * Alright, we have DTS support.
677 * We are bringing the _first_ core in this pkg
678 * online. So, initialize per-pkg data structures and
679 * then bring this core online.
681 err
= coretemp_device_add(cpu
);
685 * Check whether pkgtemp support is available.
686 * If so, add interfaces for pkgtemp.
688 if (cpu_has(c
, X86_FEATURE_PTS
))
689 coretemp_add_core(cpu
, 1);
692 * Physical CPU device already exists.
693 * So, just add interfaces for this core.
695 coretemp_add_core(cpu
, 0);
698 static void __cpuinit
put_core_offline(unsigned int cpu
)
701 struct platform_data
*pdata
;
702 struct platform_device
*pdev
= coretemp_get_pdev(cpu
);
704 /* If the physical CPU device does not exist, just return */
708 pdata
= platform_get_drvdata(pdev
);
710 indx
= TO_ATTR_NO(cpu
);
712 /* The core id is too big, just return */
713 if (indx
> MAX_CORE_DATA
- 1)
716 if (pdata
->core_data
[indx
] && pdata
->core_data
[indx
]->cpu
== cpu
)
717 coretemp_remove_core(pdata
, &pdev
->dev
, indx
);
720 * If a HT sibling of a core is taken offline, but another HT sibling
721 * of the same core is still online, register the alternate sibling.
722 * This ensures that exactly one set of attributes is provided as long
723 * as at least one HT sibling of a core is online.
725 for_each_sibling(i
, cpu
) {
729 * Display temperature sensor data for one HT sibling
730 * per core only, so abort the loop after one such
731 * sibling has been found.
737 * If all cores in this pkg are offline, remove the device.
738 * coretemp_device_remove calls unregister_platform_device,
739 * which in turn calls coretemp_remove. This removes the
740 * pkgtemp entry and does other clean ups.
742 if (!is_any_core_online(pdata
))
743 coretemp_device_remove(cpu
);
746 static int __cpuinit
coretemp_cpu_callback(struct notifier_block
*nfb
,
747 unsigned long action
, void *hcpu
)
749 unsigned int cpu
= (unsigned long) hcpu
;
753 case CPU_DOWN_FAILED
:
754 get_core_online(cpu
);
756 case CPU_DOWN_PREPARE
:
757 put_core_offline(cpu
);
763 static struct notifier_block coretemp_cpu_notifier __refdata
= {
764 .notifier_call
= coretemp_cpu_callback
,
767 static const struct x86_cpu_id coretemp_ids
[] = {
768 { X86_VENDOR_INTEL
, X86_FAMILY_ANY
, X86_MODEL_ANY
, X86_FEATURE_DTS
},
771 MODULE_DEVICE_TABLE(x86cpu
, coretemp_ids
);
773 static int __init
coretemp_init(void)
775 int i
, err
= -ENODEV
;
778 * CPUID.06H.EAX[0] indicates whether the CPU has thermal
779 * sensors. We check this bit only, all the early CPUs
780 * without thermal sensors will be filtered out.
782 if (!x86_match_cpu(coretemp_ids
))
785 err
= platform_driver_register(&coretemp_driver
);
789 for_each_online_cpu(i
)
792 #ifndef CONFIG_HOTPLUG_CPU
793 if (list_empty(&pdev_list
)) {
795 goto exit_driver_unreg
;
799 register_hotcpu_notifier(&coretemp_cpu_notifier
);
802 #ifndef CONFIG_HOTPLUG_CPU
804 platform_driver_unregister(&coretemp_driver
);
810 static void __exit
coretemp_exit(void)
812 struct pdev_entry
*p
, *n
;
814 unregister_hotcpu_notifier(&coretemp_cpu_notifier
);
815 mutex_lock(&pdev_list_mutex
);
816 list_for_each_entry_safe(p
, n
, &pdev_list
, list
) {
817 platform_device_unregister(p
->pdev
);
821 mutex_unlock(&pdev_list_mutex
);
822 platform_driver_unregister(&coretemp_driver
);
825 MODULE_AUTHOR("Rudolf Marek <r.marek@assembler.cz>");
826 MODULE_DESCRIPTION("Intel Core temperature monitor");
827 MODULE_LICENSE("GPL");
829 module_init(coretemp_init
)
830 module_exit(coretemp_exit
)