[PATCH] am625x_evm_a53: Tweak boot command to set fdt

[Christopher Obbard]

Hi Martyn.

On Tue, 2024-03-26 at 14:26 +0000, Martyn Welch wrote:
> With the current config for tha SK-AM62, fdtfile isn't set in the U-Boot
> environment. When using bootflow to boot from a block device, where the
> extlinux.conf file specifies `fdtdir`, a fallback device tree is being
> constructed from the `soc` (`k3`) and `board` (`am62x`) environment
> variables, resulting in u-Boot trying to retrieve
> `/dtbs/6.8.1+/k3-am62x.dtb`. This file doesn't exist.
> 
> The environment variables `default_device_tree` and
> `default_device_tree_arch` are set in the config, the `findfdt` script
> can be called to construct `fdtfile` from the environment variables set
> by these config options, however this script currently isn't being run.
> 
> Calling this script results in the correct device tree being retrieved:
> 
>    Retrieving file: /dtbs/6.8.1+/ti/k3-am625-sk.dtb
> 
> Many boards are calling this script as part of their boot command. The
> am62x currently isn't. Rectify this so that booting works correctly.
> 
> Signed-off-by: Martyn Welch <martyn.welch at collabora.com>

Would this also be appropriate to add to the defconfig for other AM62x boards
(e.g beagleplay) ?

Anyway, for this device:

Reviewed-by: Christopher Obbard <chris.obbard at collabora.com>

> ---
>  configs/am62x_evm_a53_defconfig | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/configs/am62x_evm_a53_defconfig
> b/configs/am62x_evm_a53_defconfig
> index 78287ec18a..e373e44a93 100644
> --- a/configs/am62x_evm_a53_defconfig
> +++ b/configs/am62x_evm_a53_defconfig
> @@ -30,7 +30,7 @@ CONFIG_SPL_LOAD_FIT=y
>  CONFIG_SPL_LOAD_FIT_ADDRESS=0x81000000
>  CONFIG_BOOTSTD_FULL=y
>  CONFIG_SYS_BOOTM_LEN=0x800000
> -CONFIG_BOOTCOMMAND="run envboot; bootflow scan -lb"
> +CONFIG_BOOTCOMMAND="run findfdt; run envboot; bootflow scan -lb"
>  CONFIG_BOARD_LATE_INIT=y
>  CONFIG_SPL_MAX_SIZE=0x58000
>  CONFIG_SPL_HAS_BSS_LINKER_SECTION=y

Thanks!

Chris