sc7180 platform support

Adding support for QTI CHIP SC7180 on ATF

Change-Id: I0d82d3a378036003fbd0bc4784f61464bb76ea82
Signed-off-by: Saurabh Gorecha <sgorecha@codeaurora.org>
Co-authored-by: Maulik Shah <mkshah@codeaurora.org>
diff --git a/docs/about/maintainers.rst b/docs/about/maintainers.rst
index d40134f..d6fafe4 100644
--- a/docs/about/maintainers.rst
+++ b/docs/about/maintainers.rst
@@ -228,6 +228,15 @@
 :F: docs/plat/qemu.rst
 :F: plat/qemu/
 
+QTI platform port
+^^^^^^^^^^^^^^^^^
+:M: Saurabh Gorecha <sgorecha@codeaurora.org>
+:G: `sgorecha`_
+:M: Debasish Mandal <dmandal@codeaurora.org>
+:M: QTI TF Maintainers <qti.trustedfirmware.maintainers@codeaurora.org>
+:F: docs/plat/qti.rst
+:F: plat/qti/
+
 Raspberry Pi 3 platform port
 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 :M: Ying-Chun Liu (PaulLiu) <paul.liu@linaro.org>
@@ -356,6 +365,7 @@
 .. _remi-triplefault: https://github.com/repk
 .. _rockchip-linux: https://github.com/rockchip-linux
 .. _sandrine-bailleux-arm: https://github.com/sandrine-bailleux-arm
+.. _sgorecha: https://github.com/sgorecha
 .. _shawnguo2: https://github.com/shawnguo2
 .. _sivadur: https://github.com/sivadur
 .. _smaeul: https://github.com/smaeul
diff --git a/docs/plat/index.rst b/docs/plat/index.rst
index 7969003..553d8b5 100644
--- a/docs/plat/index.rst
+++ b/docs/plat/index.rst
@@ -27,6 +27,7 @@
    poplar
    qemu
    qemu-sbsa
+   qti
    rpi3
    rpi4
    rcar-gen3
diff --git a/docs/plat/qti.rst b/docs/plat/qti.rst
new file mode 100644
index 0000000..814e672
--- /dev/null
+++ b/docs/plat/qti.rst
@@ -0,0 +1,41 @@
+Qualcomm Technologies, Inc.
+===========================
+
+Trusted Firmware-A (TF-A) implements the EL3 firmware layer for QTI SC7180.
+
+
+Boot Trace
+-------------
+
+Bootrom --> BL1/BL2 --> BL31 --> BL33 --> Linux kernel
+
+BL1/2 and BL33 can currently be supplied from Coreboot + Depthcharge
+
+How to build
+------------
+
+Code Locations
+~~~~~~~~~~~~~~
+
+-  Trusted Firmware-A:
+   `link <https://git.trustedfirmware.org/TF-A/trusted-firmware-a.git>`__
+
+Build Procedure
+~~~~~~~~~~~~~~~
+
+QTI SoC expects TF-A's BL31 to get integrated with other boot software
+Coreboot, so only bl31.elf need to get build from the TF-A repository.
+
+The build command looks like
+
+    make CROSS_COMPILE=aarch64-linux-gnu- PLAT=sc7180 COREBOOT=1
+
+update value of CROSS_COMPILE argument with your cross-compilation toolchain.
+
+Additional QTISECLIB_PATH=<path to qtiseclib> can be added in build command.
+if QTISECLIB_PATH is not added in build command stub implementation of qtiseclib
+is picked. qtiseclib with stub implementation doesn't boot device. This was
+added to satisfy compilation.
+
+QTISELIB for SC7180 is available at
+`link <https://review.coreboot.org/cgit/qc_blobs.git/plain/sc7180/qtiseclib/libqtisec.a>`__