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authorAndi Kleen <ak@linux.intel.com>2012-01-26 00:09:12 +0100
committerGreg Kroah-Hartman <gregkh@suse.de>2012-01-26 16:49:06 -0800
commitfa8031aefec0cf7ea6c2387c93610d99d9659aa2 (patch)
treea174505948159296198a66874655868b78718bde /drivers/cpufreq/speedstep-centrino.c
parent2f1e097e24defe64a86535b53768f5c8ab0368d1 (diff)
downloadleg-kernel-fa8031aefec0cf7ea6c2387c93610d99d9659aa2.tar.gz
cpufreq: Add support for x86 cpuinfo auto loading v4
This marks all the x86 cpuinfo tables to the CPU specific device drivers, to allow auto loading by udev. This should simplify the distribution startup scripts for this greatly. I didn't add MODULE_DEVICE_IDs to the centrino and p4-clockmod drivers, because those probably shouldn't be auto loaded and the acpi driver be used instead (not fully sure on that, would appreciate feedback) The old nforce drivers autoload based on the PCI ID. ACPI cpufreq is autoloaded in another patch. v3: Autoload gx based on PCI IDs only. Remove cpu check (Dave Jones) v4: Use newly introduce HW_PSTATE feature for powernow-k8 loading Cc: Dave Jones <davej@redhat.com> Cc: Kay Sievers <kay.sievers@vrfy.org> Signed-off-by: Andi Kleen <ak@linux.intel.com> Signed-off-by: Thomas Renninger <trenn@suse.de> Acked-by: H. Peter Anvin <hpa@zytor.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers/cpufreq/speedstep-centrino.c')
-rw-r--r--drivers/cpufreq/speedstep-centrino.c24
1 files changed, 20 insertions, 4 deletions
diff --git a/drivers/cpufreq/speedstep-centrino.c b/drivers/cpufreq/speedstep-centrino.c
index 6ea3455def21..3a953d519f46 100644
--- a/drivers/cpufreq/speedstep-centrino.c
+++ b/drivers/cpufreq/speedstep-centrino.c
@@ -25,6 +25,7 @@
#include <asm/msr.h>
#include <asm/processor.h>
#include <asm/cpufeature.h>
+#include <asm/cpu_device_id.h>
#define PFX "speedstep-centrino: "
#define MAINTAINER "cpufreq@vger.kernel.org"
@@ -595,6 +596,24 @@ static struct cpufreq_driver centrino_driver = {
.owner = THIS_MODULE,
};
+/*
+ * This doesn't replace the detailed checks above because
+ * the generic CPU IDs don't have a way to match for steppings
+ * or ASCII model IDs.
+ */
+static const struct x86_cpu_id centrino_ids[] = {
+ { X86_VENDOR_INTEL, 6, 9, X86_FEATURE_EST },
+ { X86_VENDOR_INTEL, 6, 13, X86_FEATURE_EST },
+ { X86_VENDOR_INTEL, 6, 13, X86_FEATURE_EST },
+ { X86_VENDOR_INTEL, 6, 13, X86_FEATURE_EST },
+ { X86_VENDOR_INTEL, 15, 3, X86_FEATURE_EST },
+ { X86_VENDOR_INTEL, 15, 4, X86_FEATURE_EST },
+ {}
+};
+#if 0
+/* Autoload or not? Do not for now. */
+MODULE_DEVICE_TABLE(x86cpu, centrino_ids);
+#endif
/**
* centrino_init - initializes the Enhanced SpeedStep CPUFreq driver
@@ -612,11 +631,8 @@ static struct cpufreq_driver centrino_driver = {
*/
static int __init centrino_init(void)
{
- struct cpuinfo_x86 *cpu = &cpu_data(0);
-
- if (!cpu_has(cpu, X86_FEATURE_EST))
+ if (!x86_match_cpu(centrino_ids))
return -ENODEV;
-
return cpufreq_register_driver(&centrino_driver);
}