doc: board: raspberrypi: Add documentation
Add documentation about the different configuration files for the
RaspberryPi board family.
Signed-off-by: Matthias Brugger <mbrugger@suse.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>
diff --git a/doc/board/broadcom/index.rst b/doc/board/broadcom/index.rst
new file mode 100644
index 0000000..4f0e825
--- /dev/null
+++ b/doc/board/broadcom/index.rst
@@ -0,0 +1,10 @@
+.. SPDX-License-Identifier: GPL-2.0+
+.. Copyright (C) 2022 Matthias Brugger <mbrugger@suse.com>
+
+Broadcom
+========
+
+.. toctree::
+ :maxdepth: 2
+
+ raspberrypi
diff --git a/doc/board/broadcom/raspberrypi.rst b/doc/board/broadcom/raspberrypi.rst
new file mode 100644
index 0000000..1d00b38
--- /dev/null
+++ b/doc/board/broadcom/raspberrypi.rst
@@ -0,0 +1,54 @@
+.. SPDX-License-Identifier: GPL-2.0+
+.. Copyright (C) 2022 Matthias Brugger <mbrugger@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 the supported Rasbperry Pi boards and the corresponding defconfig files:
+
+32 bit
+^^^^^^
+
+* 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 bit
+^^^^^^
+
+* 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
+
+rpi_arm64_defconfig uses the device-tree provided by the firmware instead of
+the embedded one. It allows to use the same U-Boot binary to boot different
+boards.
diff --git a/doc/board/index.rst b/doc/board/index.rst
index be9ba4d..f7bfc44 100644
--- a/doc/board/index.rst
+++ b/doc/board/index.rst
@@ -14,6 +14,7 @@
apple/index
armltd/index
atmel/index
+ broadcom/index
congatec/index
coreboot/index
emulation/index