[U-Boot] [PATCH v2 0/3] sunxi: support FEL-provided environment vars and "fel" boot target

[Hans de Goede <hdegoede@redhat.com>]

Hi,

On 14-09-15 15:15, Bernhard Nortmann wrote:
> This patch series builds upon
> http://lists.denx.de/pipermail/u-boot/2015-September/226515.html
> http://lists.denx.de/pipermail/u-boot/2015-September/226688.html
>
> v2 combines the previous submissions, and adds some suggested
> fixes/changes.
>
> The sunxi-tool side of things is discussed here:
> https://www.mail-archive.com/linux-sunxi at googlegroups.com/msg13071.html
>
> * Hans de Goede already pointed out that it might be preferable to
> make use of the spl_boot_device() function even from the main
> (non-SPL) U-Boot binary (e.g. for the "NAND" case). Currently this
> function is only available with CONFIG_SPL_BUILD set, and
> implemented in arch/arm/cpu/armv7/sunxi/board.c
> Would it be safe to enable it for non-SPL builds and use something
> like "(spl_boot_device == BOOT_DEVICE_BOARD)" for misc_init_r()?
>
> * Side note: the sunxi spl_boot_device() will probably require
> some future refinement anyway, to account for the 'oddball' A80.
> That SoC requires the SPL at a different address (0x10000 instead
> of 0x0).
>
> * The test for FEL boot mode ("eGON.BT0") in spl_boot_device()
> explicitly uses the "io" function readl() to access the signature.
> Is there a specific reason for this? Marex pointed out (on IRC)
> that the SRAM might as well be read directly. For now, I have
> followed the existing code, and used readl() and readb() to work
> with the SPL header information.
>
> * The check_signature() function somewhat duplicates very similar
> code from arch/arm/include/asm/io.h. That particular piece of code
> depends on the presence of a "__mem_pci" symbol. However, it seems
> 'generic' enough - so it may be worth to factor out and reuse it?
>
> Regards, B. Nortmann
>
> Changes in v2:
> - Rename field to fel_script_address, discard fel_data_size
> - Clearing header fields is no longer needed, as mksunxiboot.c zeroes entire image first
> - renamed fel_data_addr to fel_script_addr, discarded fel_data_size
> - make sure that FEL-related environment vars are always cleared first
> - support minimum and maximum SPL (header) version, more verbose error messages
> - renamed fel_data_addr to fel_scriptaddr
> - combined both tests into one as suggested by Hans de Goede
>
> Bernhard Nortmann (3):
>    sunxi: (mksunxiboot) signature to indicate "sunxi" SPL variant
>    sunxi: retrieve FEL-provided values to environment variables
>    sunxi: add "fel" boot target

Thanks, series looks good to me. Siarhei, can I have your Acked-by
for this series (indicating that you are ok with them from having
matching changes in sunxi-tools pov) ? Once I've your acked by
I'll queue this up for merging.

Should we target this for v2015.10, or for the next cycle ?

The changes look quite safe to me, so I'm ok with putting this
on v2015.10, but I wonder what others think.

Regards,

Hans