1. 859896c dm: gpio: rpi_b: Drop request()/free() in the driver by Simon Glass · Sat Oct 04 11:29:54 2014 -0600
  2. 7480762 dm: rpi: Convert GPIO driver to driver model by Simon Glass · Mon Sep 22 17:30:56 2014 -0600
  3. d79de1d Add GPL-2.0+ SPDX-License-Identifier to source files by Wolfgang Denk · Mon Jul 08 09:37:19 2013 +0200
  4. 45b8ae6 ARM: add basic support for the Broadcom BCM2835 SoC by Stephen Warren · Sun Aug 05 16:07:21 2012 +0000