From d3a02d9d9e6910dcbd7568af41ca51e0d5e16c5d Mon Sep 17 00:00:00 2001
From: Brendan Jackman <brendan.jackman@arm.com>
Date: Wed, 12 Oct 2016 18:24:15 +0100
Subject: [PATCH] cpuidle: Make desc, name, latency, power memoized properties

When this information is not needed, this avoids executing 4 commands on
the host for each CPU, which significantly speeds up initialising the
cpuidle module.
---
 devlib/module/cpuidle.py | 24 ++++++++++++++++++++----
 1 file changed, 20 insertions(+), 4 deletions(-)

diff --git a/devlib/module/cpuidle.py b/devlib/module/cpuidle.py
index adf7fdc..1ac06ff 100644
--- a/devlib/module/cpuidle.py
+++ b/devlib/module/cpuidle.py
@@ -47,10 +47,26 @@ class CpuidleState(object):
         self.path = path
         self.id = self.target.path.basename(self.path)
         self.cpu = self.target.path.basename(self.target.path.dirname(path))
-        self.desc = self.get('desc')
-        self.name = self.get('name')
-        self.latency = self.get('latency')
-        self.power = self.get('power')
+
+    @property
+    @memoized
+    def desc(self):
+        return self.get('desc')
+
+    @property
+    @memoized
+    def name(self):
+        return self.get('name')
+
+    @property
+    @memoized
+    def latency(self):
+        return self.get('latency')
+
+    @property
+    @memoized
+    def power(self):
+        return self.get('power')
 
     def enable(self):
         self.set('disable', 0)