From 7add855d52a10f0ab2636dceb9a4ae92abf3fc5f Mon Sep 17 00:00:00 2001
From: Jean Delvare <jdelvare@suse.de>
Date: Mon, 15 Apr 2013 14:26:02 +0000
Subject: [PATCH] DDR3: Use the right nibble from byte 21 as the MSB of tRAS.

git-svn-id: http://lm-sensors.org/svn/i2c-tools/branches/i2c-tools-3.1@6152 7894878c-1315-0410-8ee3-d5d059ff63e0
---
 CHANGES             | 1 +
 eeprom/decode-dimms | 2 +-
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/CHANGES b/CHANGES
index c7b5895..d16f3f2 100644
--- a/CHANGES
+++ b/CHANGES
@@ -10,6 +10,7 @@ SVN HEAD
                 Fix decoding of SDR SPD revision
                 Prevent hang on reserved DDR3 module type
                 Decode more DDR3 module types
+                Fix DDR3 tRAS decoding
   i2cdetect: Clarify the SMBus commands used for probing by default
   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 69d2066..78da5e8 100755
--- a/eeprom/decode-dimms
+++ b/eeprom/decode-dimms
@@ -1228,7 +1228,7 @@ sub decode_ddr3_sdram($)
 	$taa  = int($bytes->[16] / $bytes->[12]);
 	$trcd = int($bytes->[18] / $bytes->[12]);
 	$trp  = int($bytes->[20] / $bytes->[12]);
-	$tras = int((($bytes->[21] >> 4) * 256 + $bytes->[22]) / $bytes->[12]);
+	$tras = int(((($bytes->[21] & 0x0f) << 8) + $bytes->[22]) / $bytes->[12]);
 
 	printl("tCL-tRCD-tRP-tRAS", join("-", $taa, $trcd, $trp, $tras));