tree d5a702bad60fa293a9fe6275b75bed8147979263
parent 094e06a523ba040f81857609f9d889b4b57ee151
author Simon Glass <sjg@chromium.org> 1348822596 +0000
committer Anatolij Gustschin <agust@denx.de> 1349210373 +0200

bootstage: Add time accumulation feature

Sometimes we want to add up the amount of time spent in a particular
activity when it is happening in a number of discrete chunks.

Add bootstage_start() to mark the start of an acitivity and
bootstage_accum() to accumulate the time since the last start. Calling
these function in pairs results in the accumulated time being collected.

Signed-off-by: Simon Glass <sjg@chromium.org>