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board/radxa/rock5b: Disable FIQ debug interface

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The custom kernel used for the Rock5B features an FIQ debug
interface which is enabled by default. As it is not needed, it is
disabled. The documentation features instructions on how to
re-enable it, if it is needed.

Signed-off-by: Kilian Zinnecker <kilian.zinnecker@mail.de>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
This commit is contained in:
Kilian Zinnecker 2024-02-03 00:30:30 +01:00 committed by Peter Korsgaard
parent 041e8e7e40
commit c77a7acb88
5 changed files with 36 additions and 2 deletions
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1
board/radxa/rock5b/linux.fragment
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@ -1,4 +1,5 @@
CONFIG_R8169=y
# CONFIG_ROCKCHIP_FIQ_DEBUGGER is not set
# Disable Rockchip specific WiFi drivers, as the kernel
# code cannot be build with GCC 12 due to several Werrors
# CONFIG_WL_ROCKCHIP is not set

20
board/radxa/rock5b/readme.txt
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@ -20,6 +20,7 @@ output/images
├── rk3588-rock-5b.dtb
├── rk3588_bl31_v1.40.elf
├── rk3588_ddr_lp4_2112MHz_lp5_2736MHz_v1.12.bin
├── rock5b.dts
├── rock5b.its
├── rootfs.ext2
├── rootfs.ext4
@ -64,6 +65,8 @@ https://forum.radxa.com/c/rock5
Issues:
=======
WiFi
----
The custom Radxa kernel provides custom code to support WiFi. However,
that code does not compile with GCC 12, which is the current default
version in buildroot. Hence, the WiFi kernel drivers are disabled, until
@ -80,3 +83,20 @@ BR2_GCC_VERSION_11_X=y
board/radxa/rock5b/linux.fragment:
# CONFIG_WL_ROCKCHIP is not set
Rockchip FIQ Debugger
---------------------
The custom kernel used for this board features an FIQ debugger, which
can be activated by typing "fiq" on the serial interface. As this can be
annoying if a user wants to type these charakters and it is not needed
for most users, this board support disables the FIQ debugger by default.
To re-enable the FIQ debugger follow the steps:
1. In board/radxa/rock5b/rock5b.dts set the status property of the
fiq_debugger node to "okay" and set the status property of the uart2
node to "disabled"
2. Re-enable the fiq debugger module by removing the following line
from board/radxa/rock5b/linux.fragment:
# CONFIG_ROCKCHIP_FIQ_DEBUGGER is not set

12
board/radxa/rock5b/rock5b.dts Normal file
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@ -0,0 +1,12 @@
/dts-v1/;
#include "rockchip/rk3588-rock-5b.dts"
&fiq_debugger {
status = "disabled";
};
&uart2 {
pinctrl-0 = <&uart2m0_xfer>;
status = "okay";
};

2
board/radxa/rock5b/rock5b.its
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@ -20,7 +20,7 @@
};
fdt {
description = "Device Tree";
data = /incbin/("rk3588-rock-5b.dtb");
data = /incbin/("rock5b.dtb");
type = "flat_dt";
arch = "arm64";
compression = "none";

3
configs/rock5b_defconfig
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@ -14,7 +14,8 @@ BR2_LINUX_KERNEL_CUSTOM_REPO_URL="https://github.com/radxa/kernel.git"
BR2_LINUX_KERNEL_CUSTOM_REPO_VERSION="52f51a2b5ba178f331af62260d2da86d7472c14b"
BR2_LINUX_KERNEL_DEFCONFIG="rockchip_linux"
BR2_LINUX_KERNEL_DTS_SUPPORT=y
BR2_LINUX_KERNEL_INTREE_DTS_NAME="rockchip/rk3588-rock-5b"
# BR2_LINUX_KERNEL_INTREE_DTS_NAME is not set
BR2_LINUX_KERNEL_CUSTOM_DTS_PATH="board/radxa/rock5b/rock5b.dts"
BR2_LINUX_KERNEL_DTB_OVERLAY_SUPPORT=y
BR2_LINUX_KERNEL_CONFIG_FRAGMENT_FILES="board/radxa/rock5b/linux.fragment"
BR2_TARGET_ROOTFS_EXT2=y