From: Harald Welte Date: Mon, 8 Jun 2009 10:19:16 +0000 (+0800) Subject: CPUFREQ: Enable acpi-cpufreq driver for VIA/Centaur CPUs X-Git-Url: http://git.gnumonks.org/cgi-bin/gitweb.cgi?p=linux-2.6-via.git;a=commitdiff_plain;h=03c869d3e851c585b30d0b1d115546406da2c692 CPUFREQ: Enable acpi-cpufreq driver for VIA/Centaur CPUs 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 --- diff --git a/arch/x86/kernel/cpu/cpufreq/acpi-cpufreq.c b/arch/x86/kernel/cpu/cpufreq/acpi-cpufreq.c index 54b6de2..36d4df2 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;