From a312cc6da1dd71c0fa47870c3c408a8e4f6da920 Mon Sep 17 00:00:00 2001
From: Jean Delvare <khali@linux-fr.org>
Date: Tue, 15 Dec 2009 16:53:00 +0000
Subject: [PATCH] Add detection for Texas Instruments AMC6821.

git-svn-id: http://lm-sensors.org/svn/lm-sensors/trunk@5811 7894878c-1315-0410-8ee3-d5d059ff63e0
---
 CHANGES                    |  1 +
 prog/detect/sensors-detect | 21 +++++++++++++++++++++
 2 files changed, 22 insertions(+)

diff --git a/CHANGES b/CHANGES
index 3a0c3795..a8feee06 100644
--- a/CHANGES
+++ b/CHANGES
@@ -41,6 +41,7 @@ SVN-HEAD
                   More known revisions for the ADT7476
                   Add detection for Nuvoton W83L771AWG/ASG
                   Add detection for VIA Nano
+                  Add detection for Texas Instruments AMC6821
   sysconfig-lm_sensors-convert: Fix exit code
 
 3.1.1 (2009-06-21)
diff --git a/prog/detect/sensors-detect b/prog/detect/sensors-detect
index 63291fe3..fdca68aa 100755
--- a/prog/detect/sensors-detect
+++ b/prog/detect/sensors-detect
@@ -937,6 +937,11 @@ use vars qw(@i2c_adapter_names);
 		driver => "tmp421",
 		i2c_addrs => [0x4c, 0x4d],
 		i2c_detect => sub { tmp42x_detect(@_, 2); },
+	}, {
+		name => "Texas Instruments AMC6821",
+		driver => "amc6821",
+		i2c_addrs => [0x18..0x1a, 0x2c..0x2e, 0x4c..0x4e],
+		i2c_detect => sub { amc6821_detect(@_); },
 	}, {
 		name => "National Semiconductor LM95231",
 		driver => "to-be-written",
@@ -4047,6 +4052,22 @@ sub tmp42x_detect()
 	return;
 }
 
+# Registers used:
+#   0x3d: Device ID
+#   0x3e: Company ID
+sub amc6821_detect()
+{
+	my ($file, $addr) = @_;
+
+	my $dev_id = i2c_smbus_read_byte_data($file, 0x3d);
+	my $comp_id = i2c_smbus_read_byte_data($file, 0x3e);
+
+	return if ($comp_id != 0x49);		# Texas Instruments
+	return 5 if ($dev_id == 0x21);		# AMC6821
+
+	return;
+}
+
 # Registers used:
 #   0x03: Configuration (no low nibble, returns the previous low nibble)
 #   0x04: Conversion rate