Aw: Re: barebox - rk3568

[Frank Wunderlich <frank-w@public-files.de>]

Hi,

thanks, got it compiled and booting...currently looking around how to do things ;)
have successful booted linux+dtb+initrd manually and pinged my router as network test.

now i looks how to include scripts that i don't need to write all again and again...

documentation says that a direktory will be used in boards directory, but this seems not working

so i used the config-approach

DEFAULT_ENVIRONMENT_PATH=arch/arm/boards/rockchip-rk3568-evb/defaultenv

i'm not sure how the saveenv works (where the environment is stored...i have no /dev/env0). in uboot i can define a device (mmc), partition (1:1), filename (uboot.env) for storing environment onto a fat-partition. i guess you have something similar too

regards Frank


> Gesendet: Dienstag, 04. Januar 2022 um 11:51 Uhr
> Von: "Sascha Hauer" <sha@pengutronix.de>
> An: "Frank Wunderlich" <frank-w@public-files.de>
> Cc: barebox@lists.infradead.org
> Betreff: Re: barebox - rk3568
>
> Hi Frank,
>
> On Tue, Jan 04, 2022 at 09:39:05AM +0100, Frank Wunderlich wrote:
> > Hi,
> >
> > i have a prototype rk3568 board (bpi-r2-pro).
> >
> > is it possible to flash only barebox instead of uboot? in documentation i found only "creating SD-card", but i dont want to break existing partitions.
>
> The rk3568 has a fixed boot order of eMMC, SD, USB. The EVB board has a
> pushbutton to shortcircuit a pin of the eMMC. When pushed, the eMMC
> becomes invalid and the board boots from SD card. I could imagine it's
> the same on your board, so you could create an SD card and boot from
> that. Other than that an image that starts from SD card can also start
> from eMMC, the images are the same.
> You could also start from USB, the barebox tree has a rk3568 USB loader
> tool.
>
> >
> > https://www.barebox.org/doc/latest/boards/rockchip.html#rockchip-rk3568
> >
> > says it starts from sector 32, my first block for uboot (idblock.bin=spl+raminit) starts at 64, full uboot in partition at 8M.
> >
> > As it differs a bit from evb can i add new dts like in uboot?
>
> Yes, you can. See
> https://www.barebox.org/doc/latest/devel/porting.html?highlight=new%20board
> for more information how. Also have a look at commit b9f1bb8563ba
> which adds the EVB board support. You'll have to do the same for your
> board.
> One thing you'll need is a sdram-init.bin file. You can extract it from
> your BSP.
>
> Regards,
>   Sascha
>
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