Need help with booting from SPI Flash

[Matwey V. Kornilov]

пн, 24 февр. 2025 г. в 13:54, Quentin Schulz <quentin.schulz at cherry.de>:
>
> Hi Matwey,
>
> On 2/24/25 10:57 AM, Matwey V. Kornilov wrote:
> > Hi,
> >
> > I have an Allwinner based board with manually soldered 16MB SPI Flash.
> > I am trying to place u-boot into the flash and need some help so far.
> > I have already updated the board DTS file and checked that the Linux
> > kernel provides me with a /dev/mtd0 device which is writable and
> > readable.
> >
> > I enable the following config options additionally to the board configuration:
> > CONFIG_SPL_SPI_FLASH_SUPPORT,
> > CONFIG_SPL_SPI,
> > CONFIG_SPL_MTD_SUPPORT,
> > CONFIG_SPL_SPI_FLASH_MTD,
> > CONFIG_SPL_SPI_LOAD.
>
> Make sure the driver for the SPI controller on your SoC also is enabled
> in SPL.
>
> > I am not sure that I chose every relevant option.
> >
> > However, I see the following message from the bootloader:
> >
> > U-Boot SPL 2024.01-rc1-45362-g94a35b52f78-dirty (Feb 24 2025 - 12:43:35 +0300)
> > mxstatus=0xc0408000 mhcr=0x0000010b mcor=0x00000003 mhint=0x00004000
> > Trying to boot from SPI
> > Invalid bus 0 (err=-19)
> > SPI probe failed.
> > SPL: failed to boot from all boot devices
> > ### ERROR ### Please RESET the board ###
> >
> > Are there any obvious things I missed? How could I debug this?
> >
>
> Can you check your SPL DTB has the SPI bus and flash node?
>
> dtc -I dtb -O dts spl/u-boot-spl.dtb
>
> If not, you're missing a <your-board>-u-boot.dtsi in arch/arm/dts/ where
> the SPI bus (and most of what it is needed to enable the controller,
> power, clock, pinmux, ...) and the flash node has the appropriate
> bootph- property. I believe it should be bootph-pre-ram for SPL,
> according to scripts/Makefile.lib (fdtgrep_props).

Thanks. This indeed helped me, while no success yet:

U-Boot SPL 2024.01-rc1-45362-g94a35b52f78-dirty (Feb 24 2025 - 17:31:47 +0300)
mxstatus=0xc0408000 mhcr=0x0000010b mcor=0x00000003 mhint=0x00004000
Trying to boot from SPI
fdt_fixup_memory_banks: FDT_ERR_BADMAGIC
Failed to update DTB
resetting ...
reset not supported yet
### ERROR ### Please RESET the board ###

>
> Cheers,
> Quentin



-- 
With best regards,
Matwey V. Kornilov