From 25ec5f7bf0d0a6c3bb3485c5e78560722433c6a3 Mon Sep 17 00:00:00 2001
From: Jean Delvare <jdelvare@suse.de>
Date: Thu, 25 Oct 2012 11:58:14 +0000
Subject: [PATCH] decode-dimms: Print DDR2 equivalent speed of tCK max.

git-svn-id: http://lm-sensors.org/svn/i2c-tools/trunk@6080 7894878c-1315-0410-8ee3-d5d059ff63e0
---
 CHANGES             | 1 +
 eeprom/decode-dimms | 8 +++++---
 2 files changed, 6 insertions(+), 3 deletions(-)

diff --git a/CHANGES b/CHANGES
index c908e88..8f4d015 100644
--- a/CHANGES
+++ b/CHANGES
@@ -12,6 +12,7 @@ SVN HEAD
                 Merge cells by default in side-by-side output
                 Print extra timing values of DDR SDRAM
                 Print DDR core timings for all supported CAS values
+                Print DDR2 equivalent speed of tCK max
   i2cdetect: Do a best effort detection if functionality is missing
   i2c-dev.h: Minimize differences with kernel flavor
              Move SMBus helper functions to include/i2c/smbus.h
diff --git a/eeprom/decode-dimms b/eeprom/decode-dimms
index e81cf55..9115ded 100755
--- a/eeprom/decode-dimms
+++ b/eeprom/decode-dimms
@@ -1186,9 +1186,11 @@ sub decode_ddr2_sdram($)
 
 	printl_cond(defined $cycle_time, "Minimum Cycle Time", $cycle_time);
 	printl_cond(defined $access_time, "Maximum Access Time", $access_time);
-
-	printl("Maximum Cycle Time (tCK max)",
-	       tns(ddr2_sdram_ctime($bytes->[43])));
+	$temp = ddr2_sdram_ctime($bytes->[43]);
+	printl_cond(($bytes->[43] & 0xf0) && $bytes->[43] != 0xff,
+		    "Maximum Cycle Time (tCK max)",
+		    $temp == 0 ? "" : # Wouldn't be displayed, prevent div by 0
+		    tns($temp)." (DDR2-".int(2000 / $temp).")");
 
 # more timing information
 	prints("Timing Parameters");