[PATCH v4 1/6] doc: board: qualcomm: document Dragonwing board building/flashing

[Balaji Selvanathan]

From: Balaji Selvanathan <balaji.selvanathan at oss.qualcomm.com>

Introducing documentation support for Qualcomm Dragonwing series
boards. Documents the build and flashing steps.

Signed-off-by: Balaji Selvanathan <balaji.selvanathan at oss.qualcomm.com>
---
v4:
- Updated the flashing steps in the documentation

v3:
- No changes to this patch in v3

v2:
- This file is newly added in v2 based on suggestion from reviewer
---
 doc/board/qualcomm/dragonwing.rst | 46 +++++++++++++++++++++++++++++++
 1 file changed, 46 insertions(+)
 create mode 100644 doc/board/qualcomm/dragonwing.rst

diff --git a/doc/board/qualcomm/dragonwing.rst b/doc/board/qualcomm/dragonwing.rst
new file mode 100644
index 00000000000..4238b224980
--- /dev/null
+++ b/doc/board/qualcomm/dragonwing.rst
@@ -0,0 +1,46 @@
+.. SPDX-License-Identifier: GPL-2.0
+.. sectionauthor:: Balaji Selvanathan <balaji.selvanathan at oss.qualcomm.com>
+
+Qualcomm DragonWing
+========================================
+
+Qualcomm DragonWing are industrial-grade boards that provides various series
+of processors such as IQ6 (QCS615), IQ8 (QCS8300) and IQ9 (QCS9100).
+These SoCs are used for factory/industry based applications.
+More information can be found on the `Qualcomm's IQ6 product page`_,
+`Qualcomm's IQ8 product page`_ and `Qualcomm's IQ9 product page`_.
+
+.. _Qualcomm's IQ6 product page: https://docs.qualcomm.com/bundle/publicresource/87-83838-1_REV_A_Qualcomm_IQ6_Series_Product_Brief.pdf
+.. _Qualcomm's IQ8 product page: https://docs.qualcomm.com/bundle/publicresource/87-83839-1_REV_A_Qualcomm_IQ8_Series_Product_Brief________.pdf
+.. _Qualcomm's IQ9 product page: https://docs.qualcomm.com/bundle/publicresource/87-83840-1_REV_A_Qualcomm_IQ9_Series_Product_Brief.pdf
+
+Installation
+------------
+First, setup ``CROSS_COMPILE`` for aarch64. Then, build U-Boot for ``QCS615``, ``QCS8300`` or ``QCS9100``::
+
+  $ export CROSS_COMPILE=<aarch64 toolchain prefix>
+  $ make qcom_qcs8300_defconfig
+  $ make -j8 u-boot.mbn
+
+This will build the signed ``u-boot.mbn`` in the configured output directory.
+The firmware expects firmware ELF images to be "signed". The signature
+does not provide any security in this case, but it provides the firmware
+with some required metadata. More information
+about image signing can be found in :doc:`signing`.
+
+Then flash the resulting ``u-boot.mbn`` to the ``uefi_a`` partition
+on your device with ``fastboot flash uefi_a u-boot.mbn``.
+
+U-Boot should be running after a reboot (``fastboot reboot``).
+
+Note that fastboot is not yet supported in U-Boot on Dragonwing boards, as a result, to flash
+back the original firmware, or new versoins of the U-Boot, EDL mode must be used.
+
+A tool like bkerler's `edl`_ can be used for flashing with the firehose loader (for example, for QCS9100
+the firehose loader can be obtained from `dragonwing IQ9 bootbinaries`.) ::
+
+$ edl.py --loader /path/to/prog_firehose_ddr.elf w uefi_a u-boot.mbn
+
+.. _qtestsign: https://github.com/msm8916-mainline/qtestsign
+.. _edl: https://github.com/bkerler/edl
+.. _dragonwing IQ9 bootbinaries: https://artifacts.codelinaro.org/ui/native/qli-ci/flashable-binaries/qimpsdk/qcs9075-rb8-core-kit
-- 
2.34.1