[PATCH skeleton] skeleton: fixed hard-coding for master OCC hwmon sysfs path

[OpenBMC Patches]

From: Yi Li <adamliyi at msn.com>

Currently master OCC hwmon sysfs path is hardcoded to '/sys/class/hwmon/hwmon3/'.
This make the '/org/openbmc/sensors/host/PowerCap' interface cannot work when
master OCC is initilized as hwmon device other than 'hwmon3'.

This would fix the issue: https://github.com/openbmc/skeleton/issues/42

Signed-off-by: Yi Li <adamliyi at msn.com>
---
 bin/sensor_manager2.py | 11 ++++++++---
 1 file changed, 8 insertions(+), 3 deletions(-)

diff --git a/bin/sensor_manager2.py b/bin/sensor_manager2.py
index b5aac53..4fc9dc2 100755
--- a/bin/sensor_manager2.py
+++ b/bin/sensor_manager2.py
@@ -2,6 +2,7 @@
 
 import sys
 import os
+import glob
 import gobject
 import dbus
 import dbus.service
@@ -54,9 +55,13 @@ if __name__ == '__main__':
 
 	obj_path = OBJ_PATH+"/host/PowerCap"
 	sensor_obj = Sensors.PowerCap(bus,obj_path)
-	## hwmon3 is default for master OCC on Barreleye.
-	## should rewrite sensor_manager to remove hardcode
-	sensor_obj.sysfs_attr = "/sys/class/hwmon/hwmon3/user_powercap"
+	## scan hwmon sysfs for master occ's user_powercap attribute
+	for pcap_file in glob.glob('/sys/class/hwmon/*/user_powercap'):
+		occ_i2c_dev = os.path.dirname(pcap_file)+'/device'
+		occ_i2c_dev = os.path.realpath(occ_i2c_dev).split('/').pop()
+		# master OCC address
+		if occ_i2c_dev == '3-0050':
+			sensor_obj.sysfs_attr = pcap_file
 	root_sensor.add(obj_path,sensor_obj)
 
 	obj_path = OBJ_PATH+"/host/BootProgress"
-- 
2.7.1