tools/power turbostat: decode BXT TSC frequency via CPUID

Hard-code BXT ART to 19200MHz, so turbostat --debug
can fully enumerate TSC:

CPUID(0x15): eax_crystal: 3 ebx_tsc: 186 ecx_crystal_hz: 0
TSC: 1190 MHz (19200000 Hz * 186 / 3 / 1000000)

Signed-off-by: Len Brown <len.brown@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

1 files changed, 4 insertions, 1 deletions

diff --git a/tools/power/x86/turbostat/turbostat.c b/tools/power/x86/turbostat/turbostat.c
index 96d8eafdd380..b15c84323b73 100644
--- a/tools/power/x86/turbostat/turbostat.c
+++ b/tools/power/x86/turbostat/turbostat.c
@@ -3278,7 +3278,10 @@ void process_cpuid()
                                 switch(model) {
                                 case 0x4E:      /* SKL */
                                 case 0x5E:      /* SKL */
-                                        crystal_hz = 24000000;  /* 24 MHz */
+                                        crystal_hz = 24000000;  /* 24.0 MHz */
+                                        break;
+                                case 0x5C:      /* BXT */
+                                        crystal_hz = 19200000;  /* 19.2 MHz */
                                         break;
                                 default:
                                         crystal_hz = 0;