Create hwmon.pl

This script will create configuration files for
hwmon sensors for the phosphor-hwmon daemon.

This is the first of several commits for this script.

Change-Id: Ie8f59b0c94fe9c61c454ed7dde816d7c819728fc
Signed-off-by: Matt Spinler <spinler@us.ibm.com>

1 files changed, 97 insertions, 0 deletions

diff --git a/hwmon.pl b/hwmon.pl
new file mode 100755
index 0000000..1baf104
--- /dev/null
+++ b/hwmon.pl
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+#!/usr/bin/env perl
+
+#Creates a configuration file for each hwmon sensor in the MRW
+#for use by phosphor-hwmon.  These configuration files contain
+#labels and thresholds for the hwmon features for that sensor.
+
+use strict;
+use warnings;
+
+use mrw::Targets;
+use mrw::Util;
+use Getopt::Long;
+
+use constant {
+    I2C_TYPE => "i2c"
+};
+
+my $serverwizFile;
+my @hwmon;
+
+GetOptions("x=s" => \$serverwizFile) or printUsage();
+
+if (not defined $serverwizFile) {
+    printUsage();
+}
+
+my $g_targetObj = Targets->new;
+$g_targetObj->loadXML($serverwizFile);
+
+my $bmc = Util::getBMCTarget($g_targetObj);
+
+getI2CSensors($bmc, \@hwmon);
+
+exit 0;
+
+
+#Returns an array of hashes that represent hwmon enabled I2C sensors.
+sub getI2CSensors
+{
+    my ($bmc, $hwmon) = @_;
+    my $connections = $g_targetObj->findConnections($bmc, "I2C");
+
+    return if ($connections eq "");
+
+    for my $i2c (@{$connections->{CONN}}) {
+
+        my $chip = $i2c->{DEST_PARENT};
+        my @hwmonUnits = Util::getChildUnitsWithTargetType($g_targetObj,
+                                                      "unit-hwmon-feature",
+                                                      $chip);
+
+        #If chip didn't have hwmon units, it isn't hwmon enabled.
+        next unless (scalar @hwmonUnits > 0);
+
+        my %entry;
+        $entry{type} = I2C_TYPE;
+        $entry{name} = lc $g_targetObj->getInstanceName($chip);
+
+        push @$hwmon, { %entry };
+    }
+}
+
+
+#Reads the I2C attributes for the chip and adds them to the hash.
+#This includes the i2C address, and register base address and
+#offset for the I2C bus the chip is on.
+sub getI2CAttributes
+{
+    my ($i2c, $entry) = @_;
+
+    #The address comes from the destination unit, and needs
+    #to be the 7 bit value in hex without the 0x.
+    my $addr = $g_targetObj->getAttribute($i2c->{DEST}, "I2C_ADDRESS");
+    $addr = hex($addr) >> 1;
+    $entry->{addr} = sprintf("%x", $addr);
+
+    #The reg base address and offset may be optional depending on
+    #the BMC chip type.  We'll check later if it's required but missing.
+    if (!$g_targetObj->isBadAttribute($i2c->{SOURCE}, "REG_BASE_ADDRESS")) {
+        my $addr = $g_targetObj->getAttribute($i2c->{SOURCE},
+                                              "REG_BASE_ADDRESS");
+        $entry->{regBaseAddress} = sprintf("%x", hex($addr));
+    }
+
+    if (!$g_targetObj->isBadAttribute($i2c->{SOURCE}, "REG_OFFSET")) {
+        my $offset = $g_targetObj->getAttribute($i2c->{SOURCE},
+                                                "REG_OFFSET");
+        $entry->{regOffset} = sprintf("%x", hex($offset));
+    }
+}
+
+
+sub printUsage
+{
+    print "$0 -x [XML filename]\n";
+    exit(1);
+}