Re: [PATCH v4 0/5] Add fastboot to SPL

Carlo Caione [2026-08-20 20:08:24] wrote:
> Some recovery and initial-provisioning flows need a standard host protocol
> before usable firmware is available in persistent storage. U-Boot already
> provides fastboot, but the implementation can currently be started only
> from the U-Boot-proper command line.

I'm curious.  In my limited exposure to U-Boot, I got the impression that
the split between SPL and U-Boot proper is mostly a "technical detail",
usually mostly hidden from those who install it onto a device: you just
take the combined U-Boot + SPL image and write it at the appropriate
offset on the relevant device.  And usually if SPL works, U-Boot
also works.

So a bit like Jonas in the recent "hotkey in SPL" patch for rockchip
SoCs, I'm curious why/when we'd want to add to SPL functionality already
supported from U-Boot.


=== Stefan