From 421f0575b0ddf8479752fc307f9ebce1753fd4ac Mon Sep 17 00:00:00 2001
From: Jean Delvare <khali@linux-fr.org>
Date: Sun, 12 Dec 2010 16:54:35 +0000
Subject: [PATCH] Add detection of the Analog Devices ADT7410.

git-svn-id: http://lm-sensors.org/svn/lm-sensors/trunk@5895 7894878c-1315-0410-8ee3-d5d059ff63e0
---
 CHANGES                    |  1 +
 prog/detect/sensors-detect | 40 ++++++++++++++++++++++++++++++++++++++
 2 files changed, 41 insertions(+)

diff --git a/CHANGES b/CHANGES
index 3de3b5ed..6f513c51 100644
--- a/CHANGES
+++ b/CHANGES
@@ -11,6 +11,7 @@ SVN HEAD
   sensors-detect: Improve LM90 and W83L771 detection
                   Fix error seen if I2C bus numbers are not sequential
                   Add detection of SMSC EMC1423
+                  Add detection of the Analog Devices ADT7410
 
 3.2.0 (2010-10-10)
   libsensors: Increase MAX_SENSORS_PER_TYPE to 24
diff --git a/prog/detect/sensors-detect b/prog/detect/sensors-detect
index fceb267e..61362684 100755
--- a/prog/detect/sensors-detect
+++ b/prog/detect/sensors-detect
@@ -596,6 +596,11 @@ use vars qw(@i2c_adapter_names);
 		driver => "adt7475",
 		i2c_addrs => [0x2c..0x2e],
 		i2c_detect => sub { adt7490_detect(@_); },
+	}, {
+		name => "Analog Devices ADT7410",
+		driver => "to-be-written",
+		i2c_addrs => [0x48..0x4b],
+		i2c_detect => sub { adt7410_detect(@_); },
 	}, {
 		name => "Analog Devices ADT7411",
 		driver => "to-be-written",
@@ -4546,6 +4551,41 @@ sub adt7490_detect
 	return 5;
 }
 
+# Registers used:
+#   0x02: Status
+#   0x0a: Thyst
+#   0x0b: ID
+# We also rely on the fact that only the 5 LSB of the address pointer
+# are considered, so registers cycle over 32 byte boundaries.
+sub adt7410_detect
+{
+	my ($file, $addr) = @_;
+	my $status = i2c_smbus_read_byte_data($file, 0x02);
+	my $thyst = i2c_smbus_read_byte_data($file, 0x0a);
+	my $id = i2c_smbus_read_byte_data($file, 0x0b);
+
+	# Unused bits
+	return if ($status & 0x0f);
+	return if ($thyst & 0xf0);
+
+	# ID register
+	return if $id != 0xcb;
+
+	# Cycling registers
+	for (my $i = 2; $i < 16; $i *= 2) {
+		return if i2c_smbus_read_byte_data($file, 0x0a + $i * 16) != $thyst;
+		return if i2c_smbus_read_byte_data($file, 0x0b + $i * 16) != $id;
+	}
+
+	# Non-existent registers (other devices tend to have ID registers there)
+	return if i2c_smbus_read_byte_data($file, 0x03e) != 0;
+	return if i2c_smbus_read_byte_data($file, 0x03f) != 0;
+	return if i2c_smbus_read_byte_data($file, 0x0fe) != 0;
+	return if i2c_smbus_read_byte_data($file, 0x0ff) != 0;
+
+	return 3;
+}
+
 # Registers used:
 #   0x4d: Device ID
 #   0x4e: Manufacturer ID