MIRRORS/meta-raspberrypi
1
0
Fork 0
mirror of git://git.yoctoproject.org/meta-raspberrypi.git synced 2025-07-19 12:59:03 +02:00
Code Issues Actions 1 Packages Projects Releases Wiki Activity

rpi-config: U-Boot requires "enable_uart=1" to operate correctly.

Browse Source 
When RPI_USE_U_BOOT is set to 1, if enable_uart is not set to 1 in config.txt
then the board won't boot (Resolves agherzan#1189).
This requirement only affects the following boards:
- Raspberry Pi Zero W
- Raspberry Pi 3 32 & 64 bit
- Raspberry Pi 4 32 & 64 bit

Signed-off-by: DOLE Olivier <odole@dicksondata.fr>
This commit is contained in:
DOLE Olivier 2023-05-31 15:54:21 +02:00 committed by Andrei Gherzan
parent 492cb5a5d9
commit 8e07f0d328
2 changed files with 25 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

10
docs/extra-build-config.md
View File

@ -155,6 +155,16 @@ For further customisation the KERNEL_IMAGETYPE and KERNEL_BOOTCMD variables can
be overridden to select the exact kernel image type (eg. zImage) and u-boot
command (eg. bootz) to be used.
To operate correctly, U-Boot requires `enable_uart=1` in `config.txt` file for
the following boards:
* Raspberry Pi Zero W
* Raspberry Pi 3 32-bit
* Raspberry Pi 3 64-bit
* Raspberry Pi 4 32-bit
* Raspberry Pi 4 64-bit
It means that, for those boards, `RPI_USE_U_BOOT = "1"` is not compatible with
`ENABLE_UART = "0"`.
## Image with Initramfs
To build an initramfs image:

16
recipes-bsp/bootfiles/rpi-config_git.bb
View File

@ -178,13 +178,27 @@ do_deploy() {
fi
# UART support
if [ "${ENABLE_UART}" = "1" ] || [ "${ENABLE_UART}" = "0" ] ; then
if [ "${ENABLE_UART}" = "1" ] || [ "${ENABLE_UART}" = "0" ]; then
echo "# Enable UART" >>$CONFIG
echo "enable_uart=${ENABLE_UART}" >>$CONFIG
elif [ -n "${ENABLE_UART}" ]; then
bbfatal "Invalid value for ENABLE_UART [${ENABLE_UART}]. The value for ENABLE_UART can be 0 or 1."
fi
# U-Boot requires "enable_uart=1" for various boards to operate correctly
# cf https://source.denx.de/u-boot/u-boot/-/blob/v2023.04/arch/arm/mach-bcm283x/Kconfig?ref_type=tags#L65
if [ "${RPI_USE_U_BOOT}" = "1" ] && [ "${ENABLE_UART}" != "1" ]; then
case "${UBOOT_MACHINE}" in
rpi_0_w_defconfig|rpi_3_32b_config|rpi_4_32b_config|rpi_arm64_config)
if [ "${ENABLE_UART}" = "0" ]; then
bbfatal "Invalid configuration: RPI_USE_U_BOOT requires to enable the UART in config.txt for ${MACHINE}"
fi
echo "# U-Boot requires UART" >>$CONFIG
echo "enable_uart=1" >>$CONFIG
;;
esac
fi
# Infrared support
if [ "${ENABLE_IR}" = "1" ]; then
echo "# Enable infrared" >>$CONFIG