From 6cf8b4be862da870181ccadaa3b15d89f844d5a6 Mon Sep 17 00:00:00 2001
From: Jean Delvare <khali@linux-fr.org>
Date: Wed, 10 Sep 2008 07:22:06 +0000
Subject: [PATCH] Prevent misdetection of W83627DHG (and more generally,
 Winbond chips) on I2C as LM78.

git-svn-id: http://lm-sensors.org/svn/lm-sensors/branches/lm-sensors-3.0.0@5331 7894878c-1315-0410-8ee3-d5d059ff63e0
---
 CHANGES                    | 1 +
 prog/detect/sensors-detect | 5 +++++
 2 files changed, 6 insertions(+)

diff --git a/CHANGES b/CHANGES
index f97bedde..97397296 100644
--- a/CHANGES
+++ b/CHANGES
@@ -31,6 +31,7 @@ SVN-HEAD
                   Add SMSC EMC2700LPC support
                   Add ITE IT8720 support
                   Add Texas Instruments TMP411 support
+                  Prevent misdetection of W83627DHG on I2C as LM78
 
 3.0.2 (2008-05-18)
   documentation: Delete the FAQ, now maintained on the wiki
diff --git a/prog/detect/sensors-detect b/prog/detect/sensors-detect
index 629bb08a..fc7c7e51 100755
--- a/prog/detect/sensors-detect
+++ b/prog/detect/sensors-detect
@@ -3613,6 +3613,11 @@ sub lm78_detect
   return unless ($chip == 0 and ($reg == 0x00 or $reg == 0x20)) or
                     ($chip == 1 and $reg == 0x40) or
                     ($chip == 2 and ($reg & 0xfe) == 0xc0);
+
+  # Explicitly prevent misdetection of Winbond chips
+  $reg = i2c_smbus_read_byte_data($file, 0x4f);
+  return if $reg == 0xa3 || $reg == 0x5c;
+
   return (6);
 }