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More LM75 misdetection prevention.

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git-svn-id: http://lm-sensors.org/svn/lm-sensors/trunk@2018 7894878c-1315-0410-8ee3-d5d059ff63e0
This commit is contained in:
Jean Delvare
2003-10-13 20:09:52 +00:00
parent f38dc972e0
commit 228a83efb5
1 changed files with 7 additions and 2 deletions
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9
prog/detect/sensors-detect
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@@ -2463,6 +2463,7 @@ sub lm75_detect
my $i;
my ($file,$addr) = @_;
my $cur = i2c_smbus_read_word_data($file,0x00);
my $cur_varies = 0;
my $conf = i2c_smbus_read_byte_data($file,0x01);
my $hyst = i2c_smbus_read_word_data($file,0x02);
my $os = i2c_smbus_read_word_data($file,0x03);
@@ -2470,6 +2471,9 @@ sub lm75_detect
return if i2c_smbus_read_byte_data($file,($i * 0x08) + 0x01) != $conf;
return if i2c_smbus_read_word_data($file,($i * 0x08) + 0x02) != $hyst;
return if i2c_smbus_read_word_data($file,($i * 0x08) + 0x03) != $os;
$cur_varies = 1
if (! $cur_varies) and
i2c_smbus_read_word_data($file,($i * 0x08)) != $cur;
}
# Default power up state (from specs)
return 6
@@ -2477,9 +2481,10 @@ sub lm75_detect
# Default state as seen on the Asus TX97-E
return 5
if $conf == 0 and ($hyst&0x80ff) == 0x002d and ($os&0x80ff) == 0x0034;
# All bytes have the same value, obviously a misdetection.
# All registers hold the same value, obviously a misdetection
return
if (($conf<<8)|$conf) == $cur and $cur == $hyst && $cur == $os;
if (! $cur_varies) and $conf == ($cur&0xff) and $cur == $hyst
and $cur == $os;
# Unused bits in conf register
return
if ($conf&0xe0) != 0;