[PATCH v2] Fix socfpga GEN5 boot by spl+u-boot sfp on RAW

[Tom Rini]

On Sat, Nov 29, 2025 at 02:48:18PM +0800, Brian Sune wrote:

> Thanks to Jan Kiszka had provided info on
> u-boot is not able to boot by u-boot-with-spl.sfp.
> 
> All three TYPE, NUM, OFFSET mode methods
> are nonfunctional on combined raw boot.
> 
> The major cause is spl+u-boot structure is
> defined as 4x[spl+zero_pad] + u-boot.img.
> Deal to this configuration since GEN5 is used,
> the spl would require to seek by an offset
> on top of the spl offset. This means for
> each spl=0x10000 the offset is 0x40000.
> 
> However latest u-boot do not consider this
> major structure on GEN5 socfpga.
> Meanwhile, the default include file as Jan
> pointed out is completely wrong syntax and
> caused issue.
> 
> Combining both concepts, the minimum fix
> patch is provide as follows.
> 
> 1) Offset is control and default set to a
> proper offset under:
> SYS_MMCSD_RAW_MODE_U_BOOT_DATA_PART_OFFSET
> 
> 2) Only GEN5 socfpga will be affected and
> minimized contamination on other devices.
> 
> 3) Only one compuatation adjustment is made
> on spl_mmc_load. And simply introduce the
> offset adding by the kconfig offset control.
> It should be 0 by default and gate as well.
> So no possible harm should be done.

This sounds like a tricky problem to solve in a "nice" looking way.

The first thing that's unclear to me is, which of
SYS_MMCSD_RAW_MODE_U_BOOT_USE_SECTOR,
SYS_MMCSD_RAW_MODE_U_BOOT_USE_PARTITION or
SYS_MMCSD_RAW_MODE_U_BOOT_USE_PARTITION is being used here?

-- 
Tom
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