[PATCH] doc: board: raspberrypi: Add documentation

[matthias.bgg at kernel.org]

From: Matthias Brugger <mbrugger at suse.com>

Add documentation about the different configuration files for the
RaspberryPi board family.

Signed-off-by: Matthias Brugger <mbrugger at suse.com>
---
 doc/board/raspberrypi/index.rst       | 10 +++++
 doc/board/raspberrypi/raspberrypi.rst | 53 +++++++++++++++++++++++++++
 2 files changed, 63 insertions(+)
 create mode 100644 doc/board/raspberrypi/index.rst
 create mode 100644 doc/board/raspberrypi/raspberrypi.rst

diff --git a/doc/board/raspberrypi/index.rst b/doc/board/raspberrypi/index.rst
new file mode 100644
index 0000000000..7a283d81af
--- /dev/null
+++ b/doc/board/raspberrypi/index.rst
@@ -0,0 +1,10 @@
+.. SPDX-License-Identifier: GPL-2.0+
+.. Copyright (C) 2022 Matthias Brugger <mbrugger at suse.com>
+
+Raspberry Pi
+============
+
+.. toctree::
+   :maxdepth: 2
+
+   raspberrypi
diff --git a/doc/board/raspberrypi/raspberrypi.rst b/doc/board/raspberrypi/raspberrypi.rst
new file mode 100644
index 0000000000..219a780e15
--- /dev/null
+++ b/doc/board/raspberrypi/raspberrypi.rst
@@ -0,0 +1,53 @@
+.. SPDX-License-Identifier: GPL-2.0+
+.. Copyright (C) 2022 Matthias Brugger <mbrugger at suse.com>
+
+RASPBERRY PI
+============
+
+About this
+----------
+
+This document describes the information about Raspberry PI boards
+and it's usage steps.
+
+Raspberry Pi boards
+-------------------
+
+List of mainline supported Rasbperry Pi boards through the following configs:
+
+32-bits:
+^^^^^^^^
+
+* rpi_defconfig
+  - Raspberry Pi
+* rpi_0_w_defconfig
+  - Raspberry Pi 1
+  - Raspberry Pi zero
+* rpi_2_defconfig
+  - Raspberry Pi 2
+* rpi_3_32b_defconfig
+  - Raspberry Pi 3b
+* rpi_4_32b_defconfig
+  - Raspberry Pi 4b
+
+64-bits:
+^^^^^^^^
+
+* rpi_3_defconfig
+  - Raspberry Pi 3b
+* rpi_3_b_plus_defconfig
+  - Raspberry Pi 3b+
+* rpi_4_defconfig
+  - Raspberry Pi 4b
+* rpi_arm64_defconfig
+  - Raspberry Pi 3b
+  - Raspberry Pi 3b+
+  - Raspberry Pi 4b
+  - Raspberry Pi 400
+  - Raspberry Pi CM 3
+  - Raspberry Pi CM 3+
+  - Raspberry Pi CM 4
+  - Raspberry Pi zero 2 w
+
+Config rpi_arm64_defconfig uses the DTB proviede by the firmware instead of using the embedded one. It allows to actually boot the same U-Boot binary of different boards.
+
-- 
2.34.1