From: Jean Delvare <khali-PUYAD+kWke1g9hUCZPvPmw@public.gmane.org>
To: Linux I2C <linux-i2c-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>
Subject: [PATCH 1/6] DDR3: Fix tRAS value
Date: Wed, 10 Apr 2013 22:17:40 +0200 [thread overview]
Message-ID: <20130410221740.182105ce@endymion.delvare> (raw)
In-Reply-To: <20130410221330.213ca5be-R0o5gVi9kd7kN2dkZ6Wm7A@public.gmane.org>
DDR3: Use the right nibble from byte 21 as the MSB of tRAS.
---
eeprom/decode-dimms | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- i2c-tools.orig/eeprom/decode-dimms 2013-04-10 14:09:02.415218409 +0200
+++ i2c-tools/eeprom/decode-dimms 2013-04-10 14:11:18.839376112 +0200
@@ -1393,7 +1393,7 @@ 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));
--
Jean Delvare
next prev parent reply other threads:[~2013-04-10 20:17 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-04-10 20:13 [PATCH 0/6] decode-dimms: Fix and improve DDR3 support Jean Delvare
[not found] ` <20130410221330.213ca5be-R0o5gVi9kd7kN2dkZ6Wm7A@public.gmane.org>
2013-04-10 20:17 ` Jean Delvare [this message]
2013-04-10 20:18 ` [PATCH 2/6] DDR3: Fix core timings rounding Jean Delvare
2013-04-10 20:19 ` [PATCH 3/6] DDR3: Store time bases, don't print them Jean Delvare
2013-04-10 20:20 ` [PATCH 4/6] DDR3: Use fine time base Jean Delvare
2013-04-10 20:22 ` [PATCH 5/6] DDR3: Repeat core timings as time values Jean Delvare
2013-04-10 20:22 ` [PATCH 6/6] DDR3: Print core timings at all supported standard speeds Jean Delvare
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