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[PATCH 1/2] CPUFREQ: Enable acpi-cpufreq driver for VIA/Centaur CPUs

From:  Harald Welte <HaraldWelte@viatech.com>
To:  "Michael S. Zick" <lkml@morethan.org>
Subject:  [PATCH 1/2] CPUFREQ: Enable acpi-cpufreq driver for VIA/Centaur CPUs
Date:  Mon, 8 Jun 2009 18:27:54 +0800
Message-ID:  <20090608102754.GP4106@prithivi.gnumonks.org>
Cc:  Linus Torvalds <torvalds@linux-foundation.org>, Duane Griffin <duaneg@dghda.com>, Linux Kernel Mailing List <linux-kernel@vger.kernel.org>, Dave Jones <davej@redhat.com>
Archive-link:  Article, Thread

The VIA/Centaur C7, C7-M and Nano CPU's all support ACPI based cpu p-states
using a MSR interface.  The Linux driver just never made use of it, since in
addition to the check for the EST flag it also checked if the vendor is Intel.

Signed-off-by: Harald Welte <HaraldWelte@viatech.com>
---
 arch/x86/kernel/cpu/cpufreq/acpi-cpufreq.c |    3 ++-
 1 files changed, 2 insertions(+), 1 deletions(-)

diff --git a/arch/x86/kernel/cpu/cpufreq/acpi-cpufreq.c b/arch/x86/kernel/cpu/cpufreq/acpi-cpufreq.c
index 208ecf6..ee03585 100644
--- a/arch/x86/kernel/cpu/cpufreq/acpi-cpufreq.c
+++ b/arch/x86/kernel/cpu/cpufreq/acpi-cpufreq.c
@@ -90,7 +90,8 @@ static int check_est_cpu(unsigned int cpuid)
 {
 	struct cpuinfo_x86 *cpu = &cpu_data(cpuid);
 
-	if (cpu->x86_vendor != X86_VENDOR_INTEL ||
+	if ((cpu->x86_vendor != X86_VENDOR_INTEL &&
+	     cpu->x86_vendor != X86_VENDOR_CENTAUR) ||
 	    !cpu_has(cpu, X86_FEATURE_EST))
 		return 0;
 
-- 
1.6.2.4

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