Re: [PATCH 2/3 v4] board: starqltechn: get board usable - add bootcmd and docs

[Tom Rini <trini@konsulko.com>]

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On Tue, Feb 22, 2022 at 09:49:53PM +0300, Dzmitry Sankouski wrote:

> U-boot is intended to replace linux kernel in android boot image(ABL), and
> it's FIT payload to replace initramfs file. The boot process is similar to
> boot image with linux:
> - android bootloader (ABL) unpacks android boot image
> - ABL sets `linux,initrd-start property` in chosen node in unpacked FDT
> - ABL sets x0 register to FDT address, and passes control to u-boot
> - u-boot reads x0 register, and stores it in `prevbl_fdt_addr` env variable
> - u-boot reads `linux,initrd-start` property,
> and stores it in `prevbl_initrd_start_addr`
> 
> In this way, u-boot bootcmd relies on `prevbl_initrd_start_addr` env
> variable, and boils down to `bootm $prevbl_initrd_start_addr`.
> If more control on boot process is desired, pack a boot script in
> FIT image, and put it to default configuration
> 
> What done:
> - strip unneeded config options
> - add FIT image support
> - add framebuffer node, u-boot logo and video console
> - increase LMB_MAX_REGIONS, to store all linux dtb reserved memory regions
> - add linux kernel image header
> 
> Uart driver causes hang, when u-boot is used in android boot image instead
> of linux. Temporary disable console driver, until investigated and fixed.
> 
> Signed-off-by: Dzmitry Sankouski <dsankouski@gmail.com>
> Cc: Ramon Fried <rfried.dev@gmail.com>

Applied to u-boot/master, thanks!

-- 
Tom

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