From 3fb3c13ccdf6caeec15f66dd86bda93eb1b5b334 Mon Sep 17 00:00:00 2001
From: Jean Delvare <khali@linux-fr.org>
Date: Wed, 24 Jan 2007 07:29:10 +0000
Subject: [PATCH] sensors-detect: Add detection of the Maxim MAX6655/MAX6656.
 Patch from Olexiy Avramchenko.

git-svn-id: http://lm-sensors.org/svn/lm-sensors/trunk@4305 7894878c-1315-0410-8ee3-d5d059ff63e0
---
 CHANGES                    |  2 ++
 prog/detect/sensors-detect | 23 +++++++++++++++++++++++
 2 files changed, 25 insertions(+)

diff --git a/CHANGES b/CHANGES
index b6f26bcb..dc44b16c 100644
--- a/CHANGES
+++ b/CHANGES
@@ -4,6 +4,8 @@ lm_sensors CHANGES file
 SVN HEAD
   Program sensors-detect: Only probe relevant I2C addresses
                           Drop ARP-capable device detection
+                          Add Maxim MAX6655/MAX6656 detection
+                           (Olexiy Avramchenko)
 
 
 2.10.2 (20070115)
diff --git a/prog/detect/sensors-detect b/prog/detect/sensors-detect
index 1919eb88..2c43a85c 100755
--- a/prog/detect/sensors-detect
+++ b/prog/detect/sensors-detect
@@ -1143,6 +1143,12 @@ use vars qw(@pci_adapters_sis5595 @pci_adapters_sis645 @pci_adapters_sis96x);
        i2c_addrs => [0x1b,0x1f,0x48,0x4b],
        i2c_detect => sub { max6650_detect(0, @_); },
      },
+     {
+       name => "Maxim MAX6655/MAX6656",
+       driver => "max6655",
+       i2c_addrs => [0x18..0x1a, 0x29..0x2b, 0x4c..0x4e],
+       i2c_detect => sub { max6655_detect(0, @_); },
+     },
      {
        name => "TI THMC10",
        driver => "adm1021",
@@ -5211,6 +5217,23 @@ sub max6650_detect
   return 4;
 }
 
+# $_[0]: Chip to detect. Always zero.
+# $_[1]: A reference to the file descriptor to access this chip.
+# $_[2]: Address.
+#
+# Returns: undef if not detected, 4 if detected.
+sub max6655_detect
+{
+  my ($chip, $file, $addr) = @_;
+
+  # checking RDID (Device ID)
+  return unless i2c_smbus_read_byte_data($file, 0xfe) == 0x0a;
+  # checking RDRV (Manufacturer ID)
+  return unless i2c_smbus_read_byte_data($file, 0xff) == 0x4d;
+
+  return 4;
+}
+
 # $_[0]: Chip to detect (0 = VT1211)
 # $_[1]: A reference to the file descriptor to access this chip.
 #        We may assume an i2c_set_slave_addr was already done.