Changeset 2367

Timestamp:

03/19/04 19:22:30 (9 years ago)

Author:

khali

Message:

Add support for the PCA9540.

Files:

• lm-sensors/trunk/prog/detect/sensors-detect (modified) (3 diffs)

lm-sensors/trunk/prog/detect/sensors-detect

@@ -781 +781 @@
             saa1064_detect w83l784r_detect mozart_detect max6650_detect
                         fscher_detect adm1029_detect adm1031_detect max6900_detect
-                        m5879_detect);
+                        m5879_detect pca9540_detect);
 
 # This is a list of all recognized chips. 
@@ -1252 +1252 @@
        i2c_addrs => [0x38..0x3b],
        i2c_detect => sub { saa1064_detect @_ },
+     },
+     {
+       name => "Philips Semiconductors PCA9540",
+       driver => "pca9540",
+       i2c_addrs => [0x70],
+       i2c_detect => sub { pca9540_detect @_ },
      },
      {
@@ -3805 +3811 @@
                 if $status == 0x80;
         return 4;
+}
+
+# $_[0]: A reference to the file descriptor to access this chip.
+#        We may assume an i2c_set_slave_addr was already done.
+# $_[1]: Address
+# Returns: undef if not detected, 1 if detected
+# Detection is rather difficult, since the PCA9540 has a single register.
+# Fortunately, no other device is known to live at this address.
+sub pca9540_detect
+{
+        my ($file, $addr) = @_;
+        my $reg = i2c_smbus_read_byte($file);
+
+        return if ($reg & 0xf7);
+        return if $reg != i2c_smbus_read_byte($file);
+        return if $reg != i2c_smbus_read_byte($file);
+        return if $reg != i2c_smbus_read_byte($file);
+
+        return 1;
 }