[PATCH v3 6/6] doc: Add notes about raspios-bullseye

[Uladzimir Bely <ubely@ilbers.de>]

Signed-off-by: Uladzimir Bely <ubely@ilbers.de>
---
 doc/user_manual.md | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/doc/user_manual.md b/doc/user_manual.md
index caaab8cc..4d4fa763 100644
--- a/doc/user_manual.md
+++ b/doc/user_manual.md
@@ -53,6 +53,7 @@ configurations:
  - QEMU amd64 with Debian Stretch
  - QEMU amd64 with Debian Buster
  - Raspberry Pi 1 Model B with Raspbian Stretch
+ - Raspberry Pi various models with Raspberry OS Bullseye
  - Banana Pi BPI-M1
  - LeMaker HiKey
  - Terasic DE0-Nano-SoC
@@ -432,6 +433,7 @@ In Isar, each machine can use its specific Linux distro to generate `buildchroot
  - debian-stretch
  - debian-buster
  - raspbian-stretch
+ - raspios-bullseye
 
 User can select appropriate distro for specific machine by setting the following variable in machine configuration file:
 ```
@@ -492,6 +494,12 @@ DISTRO_CONFIG_SCRIPT?= "raspbian-configscript.sh"
 DISTRO_KERNELS ?= "rpi rpi2 rpi-rpfv rpi2-rpfv"
 ```
 
+For RaspiOS a different DISTRO_KERNELS list is used:
+ - `kernel` - for Raspberry Pi 1, Pi Zero, Pi Zero W, and Compute Module
+ - `kernel7` - for Raspberry Pi 2, Pi 3, Pi 3+, and Compute Module 3
+ - `kernel7l` - for Raspberry Pi 4 (32 bit OS)
+ - `kernel8` - for Raspberry Pi 4 (64 bit OS)
+
 To add new distro, user should perform the following steps:
 
  - Create `distro` folder in your layer:
-- 
2.20.1