tree d4d36cf5c3329d2b4083f3f1d7651489a2adfef3
parent 6dcb3b1141c0d6d433e684cc1da55a291d648f38
author Andrew Davies <awdavies@google.com> 1428520018 -0700
committer Andrew Davies <awdavies@google.com> 1428606889 -0700

Move SPI controller code into a common location.

Moves mutual exclusion code to atheros.h, which handles
enabling/disabling the temperature sensor pin when attempting to grab
a lock for SPI operations.

The common location is necessary for the proper functioning of the
temperature sensor driver (pending), as it shares the MISO and CLK pins
with the flash storage device.

Change-Id: I00d18b16f552f1f30e4ff477eb7838ca52e7a5c2