[PATCH] Support 100 MHz frequency transitions

Future versions of the Opteron processor may support
frequency transitions of 100 MHz, instead of the=20
current 200 MHz.  This patch enables the powernow-k8
driver to transition to an odd FID code, indicating
a multiple of 100 MHz frequency.

Signed-off-by: Jacob Shin <jacob.shin@amd.com>
Signed-off-by: Mark Langsdorf <mark.langsdorf@amd.com>
Signed-off-by: Dave Jones <davej@redhat.com>

1 files changed, 5 insertions, 4 deletions

diff --git a/arch/i386/kernel/cpu/cpufreq/powernow-k8.h b/arch/i386/kernel/cpu/cpufreq/powernow-k8.h
index b1e85bb36396..d0de37d58e9a 100644
--- a/arch/i386/kernel/cpu/cpufreq/powernow-k8.h
+++ b/arch/i386/kernel/cpu/cpufreq/powernow-k8.h
@@ -42,7 +42,7 @@ struct powernow_k8_data {
 #define CPUID_XFAM                      0x0ff00000      /* extended family */
 #define CPUID_XFAM_K8                   0
 #define CPUID_XMOD                      0x000f0000      /* extended model */
-#define CPUID_XMOD_REV_F                0x00040000
+#define CPUID_XMOD_REV_G                0x00060000
 #define CPUID_USE_XFAM_XMOD             0x00000f00
 #define CPUID_GET_MAX_CAPABILITIES      0x80000000
 #define CPUID_FREQ_VOLT_CAPABILITIES    0x80000007
@@ -86,13 +86,14 @@ struct powernow_k8_data {
  *   low fid table
  * - lowest entry in the high fid table must be a <= 200MHz + 2 * the entry
  *   in the low fid table
- * - the parts can only step at 200 MHz intervals, so 1.9 GHz is never valid
+ * - the parts can only step at <= 200 MHz intervals, odd fid values are
+ *   supported in revision G and later revisions.
  * - lowest frequency must be >= interprocessor hypertransport link speed
  *   (only applies to MP systems obviously)
  */
 
 /* fids (frequency identifiers) are arranged in 2 tables - lo and hi */
-#define LO_FID_TABLE_TOP     6  /* fid values marking the boundary    */
+#define LO_FID_TABLE_TOP     7  /* fid values marking the boundary    */
 #define HI_FID_TABLE_BOTTOM  8  /* between the low and high tables    */
 
 #define LO_VCOFREQ_TABLE_TOP    1400    /* corresponding vco frequency values */
@@ -106,7 +107,7 @@ struct powernow_k8_data {
 #define MIN_FREQ 800    /* Min and max freqs, per spec */
 #define MAX_FREQ 5000
 
-#define INVALID_FID_MASK 0xffffffc1  /* not a valid fid if these bits are set */
+#define INVALID_FID_MASK 0xffffffc0  /* not a valid fid if these bits are set */
 #define INVALID_VID_MASK 0xffffffc0  /* not a valid vid if these bits are set */
 
 #define VID_OFF 0x3f