[Uboot-stm32] [PATCH] usb: dwc2: change compatible st, stm32mp1-hsotg to st, stm32mp15-hsotg

[Ahmad Fatoum]

On 11.02.21 14:02, Tom Rini wrote:
> On Thu, Feb 11, 2021 at 12:14:51PM +0100, Ahmad Fatoum wrote:
>> I think platforms like the STM32MP1 should be handled specially, because
>> they support having an external device tree passed from the FSBL at runtime.
>> See https://github.com/trini/u-boot/blob/master/arch/arm/mach-stm32mp/boot_params.c#L32
>>
>> @Patrick, wouldn't this change break booting newer U-Boot with older TF-A in
>> some configurations? Or is this reusing-fsbl-fdt feature unused?
> 
> The long stated policy of U-Boot is to allow non-final bindings to be
> used until they're finalized in Linux in order to address the "chicken
> and egg" problem, since it's already a terrible idea to go to production
> with a Linux kernel that's using non-final bindings.  Any older TF-A
> that doesn't work with this newer binding should be on a developer board
> and they can just upgrade.  Linux says "DT is ABI" and allows the ABI to
> break when there's a bug in the DT.  We don't say "DT is ABI" we say "we
> use the Linux kernel binding".

I see. Thanks for the clarification.

I am still curious what configurations use the TF-A-provided device tree
for U-Boot. Patrick?

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