Hi Simon,
Am 2022-03-06 04:08, schrieb Simon Glass:
On Thu, 20 Jan 2022 at 11:16, Simon Glass sjg@chromium.org wrote:
On Thu, 20 Jan 2022 at 01:38, Michael Walle michael@walle.cc wrote:
Am 2022-01-19 15:56, schrieb Simon Glass:
On Wed, 19 Jan 2022 at 01:09, Michael Walle michael@walle.cc wrote:
The bootflow feature provide a built-in way for U-Boot to automatically boot an Operating System without custom scripting and other customisation. This is called 'standard boot' since it provides a standard way for U-Boot to boot a distro, without scripting.
It introduces the following concepts:
- bootdev - a device which can hold a distro
- bootmeth - a method to scan a bootdev to find bootflows (owned by U-Boot)
- bootflow - a description of how to boot (owned by the distro)
This series provides an implementation of these, enabled to scan for bootflows from MMC, USB and Ethernet. It supports the existing distro boot as well as the EFI loader flow (bootefi/bootmgr). It works similiarly to the existing script-based approach, but is native to U-Boot.
With this we can boot on a Raspberry Pi 3 with just one command:
bootflow scan -lb
which means to scan, listing (-l) each bootflow and trying to boot each one (-b). The final patch shows this.
I wanted to give this a try, but I only get the following output:
=> setenv boot_targets usb0 => bootflow scan -lb Scanning for bootflows in all bootdevs Seq Method State Uclass Part Name Filename
Unknown seq 0 for label 'usb0'
(0 bootflows, 0 valid)
where usb0 is a debian installation medium.
Yes that's not working yet. Can you try an mmc device for testing?
Ok thanks for confirming. Yes I can test with a sd card, but I'll probably do it when there is support for loading a device tree by the fdtfile.
Yes I need to look at that one.
Can you please point me to the OS image you are using.
I'm not testing this on a raspberry pi, if that's what you had in mind.
but for what it's worth, the image i'm building is for a kontron sl28 board and it is based on vanilla buildroot. the config and be found at the vanilla buildroot repo: configs/kontron_smarc_sal28_defconfig
-michael
I have added basic USB support in the v4 series.