[PATCH skeleton v3] skeleton: Add dbus objects for adm1278 hwmon sensors

[OpenBMC Patches]

From: Yi Li <adamliyi at msn.com>

Add dbus object for adm1278 Vout and Iout sensors.
Add the sense resistor as scaling factor in skeleton.

The sense resistor value is used while converting adm1278 'current' and 'power'
register value to real world value. The adm1278 driver does the conversion,
but without taking into account of the sense resistor.
The resistor value need to be set according to Barreleye design.

Signed-off-by: Yi Li <adamliyi at msn.com>
---
 bin/Barreleye.py | 22 ++++++++++++++++++++++
 bin/Sensors.py   |  3 ++-
 2 files changed, 24 insertions(+), 1 deletion(-)

diff --git a/bin/Barreleye.py b/bin/Barreleye.py
index 09fefa0..2769800 100755
--- a/bin/Barreleye.py
+++ b/bin/Barreleye.py
@@ -717,5 +717,27 @@ HWMON_CONFIG = {
 		'101' :  { 'object_path' : 'temperature/membuf7','poll_interval' : 5000,'scale' : 1000,'units' : 'C' },
 		}
 	},
+	'4-0010' :  {
+		'names' : {
+			# Barreleye uses 0.25 millioohms sense resistor for adm1278
+			# To convert Iout register value Y to real-world value X, use an equation:
+			# X= 1/m * (Y * 10^-R - b), here m = 800 * R_sense, and R_sense is expressed in milliohms.
+			# The adm1278 driver did the conversion, but the R_sense is set here as a scale factor. 
+			'curr1_input' : { 'object_path' : 'HSCA/Iout','poll_interval' : 5000,'scale' : 0.25,'units' : 'mA' },
+			'in2_input' : { 'object_path' : 'HSCA/Vout','poll_interval' : 5000,'scale' : 1,'units' : 'mV' },
+		}
+	},
+	'5-0010' :  {
+		'names' : {
+			'curr1_input' : { 'object_path' : 'HSCB/Iout','poll_interval' : 5000,'scale' : 0.25,'units' : 'mA' },
+			'in2_input' : { 'object_path' : 'HSCB/Vout','poll_interval' : 5000,'scale' : 1,'units' : 'mV' },
+		}
+	},
+	'6-0010' :  {
+		'names' : {
+			'curr1_input' : { 'object_path' : 'HSCC/Iout','poll_interval' : 5000,'scale' : 0.25,'units' : 'mA' },
+			'in2_input' : { 'object_path' : 'HSCC/Vout','poll_interval' : 5000,'scale' : 1,'units' : 'mV' },
+		}
+	},
 }
 
diff --git a/bin/Sensors.py b/bin/Sensors.py
index f951eeb..06e0b5f 100755
--- a/bin/Sensors.py
+++ b/bin/Sensors.py
@@ -124,7 +124,8 @@ class HwmonSensor(SensorValue,SensorThresholds):
 			val = (self.properties[SensorValue.IFACE_NAME]['value']-offset) * scale
 			return [True,val]
 		else:
-			val = (value/scale) + offset
+			# Keep the val as integer. scale may be floating point
+			val = int(value/scale + offset)
 			if (val != self.value):
 				SensorValue.setValue(self,val)
 				self.check_thresholds(val)
-- 
2.8.1