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

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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
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docs/extra-build-config.md
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@@ -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: