[PATCH v7 07/10] board: ti: add default dtb for am62 in falcon mode

[Anshul Dalal]

On Mon Jun 9, 2025 at 8:27 PM IST, Tom Rini wrote:
> On Mon, Jun 09, 2025 at 01:05:36PM +0530, Anshul Dalal wrote:
>> On Sat Jun 7, 2025 at 12:39 AM IST, Tom Rini wrote:
>> > On Tue, Jun 03, 2025 at 07:54:47PM +0530, Anshul Dalal wrote:
>> >
>> >> The SPL_FS_LOAD_ARGS_NAME config is used for the arguments to the kernel
>> >> (dtb in our case) in falcon boot.
>> >> 
>> >> Setting it in board specific Kconfig allows us to reuse the same config
>> >> fragment 'am62x_r5_falcon.config' for all 3 platforms for enabling
>> >> falcon boot.
>> >> 
>> >> Signed-off-by: Anshul Dalal <anshuld at ti.com>
>> >> ---
>> >>  board/ti/am62ax/Kconfig | 3 +++
>> >>  board/ti/am62px/Kconfig | 3 +++
>> >>  board/ti/am62x/Kconfig  | 3 +++
>> >>  3 files changed, 9 insertions(+)
>> >
>> > Why can't whatever is using the fragment also set this? Is it because
>> > you're only using this as part of say:
>> > make am62ax_evm_r5_defconfig am62x_falcon.config
>> > ?
>> 
>> Correct, having three different config fragments with only changes to the
>> dtb path doesn't seem very useful imo.
>
> Then these belong back in the main defconfig itself I think.

That's not an option since SPL_FS_LOAD_ARGS_NAME depends on
SPL_OS_BOOT[1] and due to the way config fragments are applied. Since we
only set OS_BOOT to y inside of the fragment, we can not define any
configs that depend on it before that in the defconfig like
SPL_FS_LOAD_ARGS_NAME, it would just default to "args" instead.

[1]: common/spl/Kconfig:794
config SPL_FS_LOAD_ARGS_NAME
	string "File to load for the OS kernel argument parameters from the filesystem"
	depends on (SPL_FS_EXT4 || SPL_FS_FAT || SPL_FS_SQUASHFS) && SPL_OS_BOOT
	default "args"