ARM: sti: Add STiH415 SOC support

The STiH415 is the next generation of HD, AVC set-top box processors for
satellite, cable, terrestrial and IP-STB markets. It is an ARM Cortex-A9
1.0 GHz, dual-core CPU.

Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@st.com>
CC: Stephen Gallimore <stephen.gallimore@st.com>
CC: Stuart Menefy <stuart.menefy@st.com>
CC: Arnd Bergmann <arnd@arndb.de>
CC: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@st.com>
Signed-off-by: Olof Johansson <olof@lixom.net>
diff --git a/Documentation/arm/sti/overview.txt b/Documentation/arm/sti/overview.txt
new file mode 100644
index 0000000..1a4e93d
--- /dev/null
+++ b/Documentation/arm/sti/overview.txt
@@ -0,0 +1,33 @@
+			STi ARM Linux Overview
+			==========================
+
+Introduction
+------------
+
+  The ST Microelectronics Multimedia and Application Processors range of
+  CortexA9 System-on-Chip are supported by the 'STi' platform of
+  ARM Linux. Currently STiH415, STiH416 SOCs are supported with both
+  B2000 and B2020 Reference boards.
+
+
+  configuration
+  -------------
+
+  A generic configuration is provided for both STiH415/416, and can be used as the
+  default by
+	make stih41x_defconfig
+
+  Layout
+  ------
+  All the files for multiple machine families (STiH415, STiH416, and STiG125)
+  are located in the platform code contained in arch/arm/mach-sti
+
+  There is a generic board board-dt.c in the mach folder which support
+  Flattened Device Tree, which means, It works with any compatible board with
+  Device Trees.
+
+
+  Document Author
+  ---------------
+
+  Srinivas Kandagatla <srinivas.kandagatla@st.com>, (c) 2013 ST Microelectronics