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Add detection of STMicroelectronics STTS424 (JEDEC JC42.4-compliant

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memory-module temperature sensors.)


git-svn-id: http://lm-sensors.org/svn/lm-sensors/trunk@5850 7894878c-1315-0410-8ee3-d5d059ff63e0
This commit is contained in:
Jean Delvare
2010-07-06 08:44:21 +00:00
parent 96ff880b93
commit 33d861b984
2 changed files with 52 additions and 0 deletions
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51
prog/detect/sensors-detect
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@@ -1184,6 +1184,11 @@ use vars qw(@i2c_adapter_names);
driver => "to-be-written", # emc1403
i2c_addrs => [0x18, 0x2a, 0x4c, 0x4d],
i2c_detect => sub { emc1403_detect(@_, 1); },
}, {
name => "ST STTS424",
driver => "to-be-written",
i2c_addrs => [0x18..0x1f],
i2c_detect => sub { jedec_JC42_4_detect(@_, 0); },
}, {
name => "Smart Battery",
driver => "sbs", # ACPI driver, not sure if it always works
@@ -5304,6 +5309,52 @@ sub max6655_detect
return 6;
}
# Chip to detect: 0 = STTS424
# Registers used:
# 0x00: Capabilities
# 0x01: Configuration
# 0x06: Manufacturer ID
# 0x07: Device ID
sub jedec_JC42_4_detect
{
my ($file, $addr, $chip) = @_;
my ($reg, $manid, $devid);
# We test the MSB only at first, because not all chips enjoy
# word access.
# Check for unused bits
$reg = i2c_smbus_read_byte_data($file, 0x00);
return if $reg & 0xff;
$reg = i2c_smbus_read_byte_data($file, 0x01);
return if $reg & 0xf8;
# Check for manufacturer and device ID
$manid = i2c_smbus_read_byte_data($file, 0x06);
$devid = i2c_smbus_read_byte_data($file, 0x07);
if ($chip == 0) {
return unless $manid == 0x10; # STMicrolectronics
return unless $devid == 0x00; # STTS424
}
# Now, do it all again with words. Note that we get
# the MSB first, so all value checks are byte-swapped.
# Check for unused bits
$reg = i2c_smbus_read_word_data($file, 0x00);
return if $reg < 0 || $reg & 0xc0ff;
$manid = i2c_smbus_read_word_data($file, 0x06);
$devid = i2c_smbus_read_word_data($file, 0x07);
return if $manid < 0 || $devid < 0;
if ($chip == 0) {
return unless $manid == 0x4a10; # STMicrolectronics
return unless ($devid & 0xfeff) == 0x0000; # STTS424
}
return 5;
}
# This isn't very good detection.
# Verify the i2c address, and the stepping ID (which is 0xb0 on
# my chip but could be different for others...