[lm-sensors] lm-sensors: Add detection of MAX6639

[Guenter Roeck <guenter.roeck@ericsson.com>]

Index: prog/detect/sensors-detect
=================================--- prog/detect/sensors-detect	(revision 5906)
+++ prog/detect/sensors-detect	(working copy)
@@ -828,6 +828,11 @@
 		i2c_addrs => [0x18..0x1a, 0x29..0x2b, 0x4c..0x4e],
 		i2c_detect => sub { max1668_detect(@_, 2); },
 	}, {
+		name => "Maxim MAX6639",
+		driver => "max6639",
+		i2c_addrs => [0x2c, 0x2e, 0x2f],
+		i2c_detect => sub { max6639_detect(@_); },
+	}, {
 		name => "Maxim MAX6650/MAX6651",
 		driver => "max6650",
 		i2c_addrs => [0x1b, 0x1f, 0x48, 0x4b],
@@ -5446,6 +5451,27 @@
 	return @res;
 }
 
+# Chip to detect: MAX6639
+# Registers used:
+#   0x3d: Device ID
+#   0x3e: Manufacturer ID
+#   0x3f: Chip revision
+sub max6639_detect
+{
+	my ($file, $addr) = @_;
+	my ($man_id, $dev_id, $rev);
+
+	$dev_id = i2c_smbus_read_byte_data($file, 0x3d);
+	$man_id = i2c_smbus_read_byte_data($file, 0x3e);
+	$rev = i2c_smbus_read_byte_data($file, 0x3f);
+	
+	return unless $man_id = 0x4d;	# Maxim
+	return unless $dev_id = 0x58;	# MAX6639
+	return unless $rev = 0x00;
+
+	return 6;
+}
+
 # The max6650 has no device ID register. However, a few registers have
 # spare bits, which are documented as being always zero on read. We read
 # all of these registers check the spare bits. Any non-zero means this
Index: CHANGES
=================================--- CHANGES	(revision 5906)
+++ CHANGES	(working copy)
@@ -19,6 +19,7 @@
                   Add detection of the National Semiconductor LM94
                   Add detection of the ITE IT8728F
                   Implement universal detection for coretemp (#2381)
+                  Add detection of Maxim MAX6639
 
 3.2.0 (2010-10-10)
   libsensors: Increase MAX_SENSORS_PER_TYPE to 24

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