added a very basic frequency module

bumblebee/modules/frequency.py

@@ -0,0 +1,31 @@
+# pylint: disable=C0111,R0903
+
+"""Displays CPU frequency.
+"""
+
+import subprocess 
+import bumblebee.input
+import bumblebee.output
+import bumblebee.engine
+
+ 
+class Module(bumblebee.engine.Module):
+    def __init__(self, engine, config):
+        super(Module, self).__init__(engine, config,
+            bumblebee.output.Widget(full_text=self.frequency)
+        )
+        self._frequency = 0
+        
+    def frequency(self, widget):
+        return self._frequency
+
+    def getFrequency(self):
+        cmd = "cpupower frequency-info  | grep \"Hz\" | grep \"current CPU\" | xargs |  cut -d ' ' -f 4-5"
+        return subprocess.Popen(cmd, shell=True, stdout=subprocess.PIPE).stdout.read().decode("utf-8").rstrip()
+
+    def update(self, widgets):
+        self._frequency = self.getFrequency()        
+
+
+
+# vim: tabstop=8 expandtab shiftwidth=4 softtabstop=4

themes/greyish-powerline.json

@@ -28,6 +28,10 @@
 		}
 	},
 	"battery": {
+		"unknown":{
+			"bg": "#4f4f4f",
+			"fg": "#e9e9e9"
+		},
 		"charged": {
 			"fg": "#002b36",
 			"bg": "#859900"

themes/icons/ascii.json

@@ -4,6 +4,7 @@
 	},
 	"memory": { "prefix": "ram" },
 	"cpu": { "prefix": "cpu" },
+	"frequency": { "prefix": "frequency" },
 	"disk": { "prefix": "hdd" },
 	"dnf": { "prefix": "dnf" },
 	"brightness": { "prefix": "o" },

themes/icons/awesome-fonts.json

@@ -8,6 +8,7 @@
 	"datetime": { "prefix": "" },
 	"memory": { "prefix": "" },
 	"cpu": { "prefix": "" },
+	"frequency": { "prefix": "" },
 	"disk": { "prefix": "" },
 	"dnf": { "prefix": "" },
 	"pacman": { "prefix": "" },

themes/icons/ionicons.json

@@ -8,6 +8,7 @@
 	"datetime": { "prefix": "\uf3b3" },
 	"memory": { "prefix": "\uf389" },
 	"cpu": { "prefix": "\uf4b0" },
+	"frequency": { "prefix": "\uf4b0" },
 	"disk": { "prefix": "\u26c1" },
 	"dnf": { "prefix": "\uf2be" },
 	"pacman": { "prefix": "\uf2be" },