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Extra checks to prevent misdetection of MAX1617 and LM84.

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git-svn-id: http://lm-sensors.org/svn/lm-sensors/trunk@2013 7894878c-1315-0410-8ee3-d5d059ff63e0
This commit is contained in:
Jean Delvare
2003-10-10 20:57:40 +00:00
parent 12832e0765
commit 7e659d760f
1 changed files with 28 additions and 1 deletions
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29
prog/detect/sensors-detect
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@@ -2450,7 +2450,10 @@ sub lm78_alias_detect
# make sense);
# 3 means that the configuration register passes the test;
# 2 means that the configuration register test failed, so the chipset
# is unlikely to be a LM75.
# is unlikely to be a LM75;
# 1 means that the chip contains only zeroes, so it's unlikely to be
# a LM75 (we could even consider returning no confidence value
# at all). *TODO*
# Registers used:
# 0x01: Temperature
# 0x01: Configuration
@@ -2966,6 +2969,7 @@ sub adm1024_detect
# 0xfe: Company ID (all but LM84 and MAX1617)
# 0xff: Revision (ADM1021, ADM1021A/ADM1023 and MAX1617A)
# 0x02: Status
# 0x00-0x01, 0x05-0x08: Temperatures (MAX1617 and LM84)
# Note: Especially the MAX1617 has very bad detection; we give it a low
# confidence value.
sub adm1021_detect
@@ -2984,6 +2988,29 @@ sub adm1021_detect
# The remaining things are flaky at best. Perhaps something can be done
# with the fact that some registers are unreadable?
return if (i2c_smbus_read_byte_data($file,0x02) & 0x03) != 0;
# Extra checks for MAX1617 and LM84, since those are often misdetected
if ($chip == 2 || $chip == 5)
{
# Increase the misdetect value each time a temperature doesn't
# match reasonable expectations
my $misdetect = 0;
# Negative temperatures
$misdetect++ if i2c_smbus_read_byte_data($file,0x00) > 128;
$misdetect++ if i2c_smbus_read_byte_data($file,0x01) > 128;
# Negative high limits
$misdetect++ if ((my $lhi=i2c_smbus_read_byte_data($file,0x05)) >= 128);
$misdetect++ if ((my $rhi=i2c_smbus_read_byte_data($file,0x07)) >= 128);
# Low limits over high limits
$lhi-=256 if $lhi >= 128;
$rhi-=256 if $rhi >= 128;
my $llo=i2c_smbus_read_byte_data($file,0x06);
my $rlo=i2c_smbus_read_byte_data($file,0x08);
$llo-=256 if $llo >= 128;
$rlo-=256 if $rlo >= 128;
$misdetect++ if $llo > $lhi;
$misdetect++ if $rlo > $rhi;
return if $misdetect >= 4;
}
return 3 if $chip == 2;
return 7 if $chip <= 3;
return 6;