linux-kernel - [PATCH 6/8] HWMON: Convert coretemp to x86 cpuid autoprobing

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Message-Id: <1324338394-4670-7-git-send-email-andi@firstfloor.org>
Date:	Mon, 19 Dec 2011 15:46:32 -0800
From:	Andi Kleen <andi@...stfloor.org>
To:	linux-kernel@...r.kernel.org
Cc:	hpa@...or.com, trenn@...e.de, kay.sievers@....org,
	Andi Kleen <ak@...ux.intel.com>, fenghua.yu@...el.com,
	khali@...ux-fr.org, guenter.roeck@...csson.com
Subject: [PATCH 6/8] HWMON: Convert coretemp to x86 cpuid autoprobing

From: Andi Kleen <ak@...ux.intel.com>

Use the new x86 cpuid autoprobe interface for the Intel coretemp
driver.

Cc: fenghua.yu@...el.com
Cc: khali@...ux-fr.org
Cc: guenter.roeck@...csson.com
Signed-off-by: Andi Kleen <ak@...ux.intel.com>
---
 drivers/hwmon/coretemp.c |   17 ++++++++++++++---
 1 files changed, 14 insertions(+), 3 deletions(-)

diff --git a/drivers/hwmon/coretemp.c b/drivers/hwmon/coretemp.c
index 104b376..b965f80 100644
--- a/drivers/hwmon/coretemp.c
+++ b/drivers/hwmon/coretemp.c
@@ -39,6 +39,7 @@
 #include <linux/moduleparam.h>
 #include <asm/msr.h>
 #include <asm/processor.h>
+#include <asm/cpu_device_id.h>
 
 #define DRVNAME	"coretemp"
 
@@ -756,13 +757,23 @@ static struct notifier_block coretemp_cpu_notifier __refdata = {
 	.notifier_call = coretemp_cpu_callback,
 };
 
+static const struct x86_cpu_id coretemp_ids[] = {
+	{ X86_VENDOR_INTEL, X86_FAMILY_ANY, X86_MODEL_ANY, X86_FEATURE_DTS },
+	{}
+};
+MODULE_DEVICE_TABLE(x86cpu, coretemp_ids);
+
 static int __init coretemp_init(void)
 {
 	int i, err = -ENODEV;
 
-	/* quick check if we run Intel */
-	if (cpu_data(0).x86_vendor != X86_VENDOR_INTEL)
-		goto exit;
+	/*
+	 * CPUID.06H.EAX[0] indicates whether the CPU has thermal
+	 * sensors. We check this bit only, all the early CPUs
+	 * without thermal sensors will be filtered out.
+	 */
+	if (!x86_match_cpu(coretemp_ids))
+		return -ENODEV;
 
 	err = platform_driver_register(&coretemp_driver);
 	if (err)
-- 
1.7.7.4

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