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sensors-detect: Add TMP42x chip detection

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This patch adds detection for TI's TMP421, TMP422 and TMP423 chips to
sensors-detect. Only the manufactory ID and the device ID is used for
detection. I hope this is reliable enough.


git-svn-id: http://lm-sensors.org/svn/lm-sensors/trunk@5754 7894878c-1315-0410-8ee3-d5d059ff63e0
This commit is contained in:
Andre Prendel
2009-07-14 20:14:53 +00:00
parent f69dbc887a
commit 4cf83be1b1
2 changed files with 36 additions and 0 deletions
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1
CHANGES
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@@ -7,6 +7,7 @@ SVN-HEAD
sensors-detect: Refer to tmp401 driver if TMP411 is detected
Clean up the discovery of i2c adapters
Report unsupported Access Bus adapters
Add detection for TI's TMP421, TMP422 and TMP423 chips
3.1.1 (2009-06-21)
isadump: Use geteuid instead of getuid so that setuid bit works

35
prog/detect/sensors-detect
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@@ -907,6 +907,21 @@ use vars qw(@i2c_adapter_names);
driver => "tmp401",
i2c_addrs => [0x4c..0x4e],
i2c_detect => sub { lm90_detect(@_, 10); },
}, {
name => "Texas Instruments TMP421",
driver => "tmp421",
i2c_addrs => [0x2a, 0x4c..0x4f], # 0x1c-0x1f not probed.
i2c_detect => sub { tmp42x_detect(@_, 0); },
}, {
name => "Texas Instruments TMP422",
driver => "tmp421",
i2c_addrs => [0x4c..0x4f],
i2c_detect => sub { tmp42x_detect(@_, 1); },
}, {
name => "Texas Instruments TMP423",
driver => "tmp421",
i2c_addrs => [0x4c, 0x4d],
i2c_detect => sub { tmp42x_detect(@_, 2); },
}, {
name => "National Semiconductor LM95231",
driver => "to-be-written",
@@ -3906,6 +3921,26 @@ sub lm90_detect
return;
}
# Chip to detect: 0 = TMP421, 1 = TMP422, 2 = TMP423
# Registers used:
# 0xfe: Manufactorer ID
# 0xff: Device ID
sub tmp42x_detect()
{
my ($file, $addr, $chip) = @_;
my $mid = i2c_smbus_read_byte_data($file, 0xfe);
my $cid = i2c_smbus_read_byte_data($file, 0xff);
return if ($mid != 0x55);
return 6 if ($chip == 0 && $cid == 0x21); # TMP421
return 6 if ($chip == 1 && $cid == 0x22); # TMP422
return 6 if ($chip == 2 && $cid == 0x23); # TMP423
return;
}
# Registers used:
# 0x03: Configuration (no low nibble, returns the previous low nibble)
# 0x04: Conversion rate