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Add detection of MAX6642

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git-svn-id: http://lm-sensors.org/svn/lm-sensors/trunk@5978 7894878c-1315-0410-8ee3-d5d059ff63e0
This commit is contained in:
Guenter Roeck
2011-06-01 16:20:05 +00:00
parent 5b2e1333ed
commit ab116c9658
2 changed files with 40 additions and 0 deletions
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39
prog/detect/sensors-detect
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@@ -847,6 +847,11 @@ use vars qw(@i2c_adapter_names);
driver => "max6639",
i2c_addrs => [0x2c, 0x2e, 0x2f],
i2c_detect => sub { max6639_detect(@_); },
}, {
name => "Maxim MAX6642",
driver => "max6642",
i2c_addrs => [0x48..0x4f],
i2c_detect => sub { max6642_detect(@_); },
}, {
name => "Maxim MAX6655/MAX6656",
driver => "max6655",
@@ -5789,6 +5794,40 @@ sub max6639_detect
return 6;
}
# Chip to detect: MAX6642
# Registers used:
# 0x02: Status register
# 0x03: Configuration register
# 0xfe: Manufacturer ID
# 0x04, 0x06, 0xff: No registers
# We use the 0x04, 0x06 and 0xff addresses (unused) to improve reliability.
# These are not real registers and will always return the last returned value.
# This isn't documented.
sub max6642_detect
{
my ($file, $addr) = @_;
my ($man_id, $conf, $status);
$man_id = i2c_smbus_read_byte_data($file, 0xfe);
return unless $man_id == 0x4d; # Maxim
return if i2c_smbus_read_byte_data($file, 0x04, NO_CACHE) != $man_id;
return if i2c_smbus_read_byte_data($file, 0x06, NO_CACHE) != $man_id;
return if i2c_smbus_read_byte_data($file, 0xff, NO_CACHE) != $man_id;
$status = i2c_smbus_read_byte_data($file, 0x02);
# Bit 5, 3, 1 and 0 should be zero
return unless ($status & 0x2b) == 0x00;
return if i2c_smbus_read_byte_data($file, 0x04, NO_CACHE) != $status;
return if i2c_smbus_read_byte_data($file, 0x06, NO_CACHE) != $status;
return if i2c_smbus_read_byte_data($file, 0xff, NO_CACHE) != $status;
$conf = i2c_smbus_read_byte_data($file, 0x03);
# The 4 lower bits should be zero
return unless ($conf & 0x0f) == 0x00;
return 5;
}
sub max6655_detect
{
my ($file, $addr) = @_;