[PATCH 23/24] tools/power turbostat: decode BXT TSC frequency via CPUID

[Tim Gardner]

From: Len Brown <len.brown at intel.com>

BugLink: http://bugs.launchpad.net/bugs/1591802

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 at intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki at intel.com>
(cherry picked from commit e8efbc80db5e824ce2382d5e65429b6b493e71e2)
Signed-off-by: Tim Gardner <tim.gardner at canonical.com>
---
 tools/power/x86/turbostat/turbostat.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/tools/power/x86/turbostat/turbostat.c b/tools/power/x86/turbostat/turbostat.c
index 96d8eaf..b15c843 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;
-- 
2.7.4