From: Ahmad Fatoum <a.fatoum@pengutronix.de>
To: Konstantin Kletschke <konstantin.kletschke@inside-m2m.de>,
barebox@lists.infradead.org
Subject: Re: Compiled in boot environment and dtbo files
Date: Fri, 18 Jun 2021 08:48:51 +0200 [thread overview]
Message-ID: <391fd504-14b8-6278-cbfe-25a5dd32ed42@pengutronix.de> (raw)
In-Reply-To: <FA60DA2B-8C76-4460-8009-88EAB94A0F2C@inside-m2m.de>
Hello Konstantin,
On 16.06.21 10:10, Konstantin Kletschke wrote:
> Dear community,
>
> actually I wonder how to prepare a reset/boot up default boot environment compiled in.
>
> Is it correct, that my 1st task to achieve this is to add a new file in defaultenv/defaultenv-2-base/boot
> like “insidem2m” for example? I managed to modify the existing “sd” entry to be able to boot
> and persist this, thats how my new entry should look:
>
> #!/bin/sh
>
> global.bootm.image=/boot/uImage
> global.bootm.oftree=/boot/am335x-boneblack.dtb
> global.linux.bootargs.dyn.root="cape_enable=capemgr.enable_partno=BB-UART1,BB-UART4 bone_capemgr.uboot_capemgr_enabled=1 root=/dev/mmcblk0p2 rootfstype=ext4 rootwait”
>
> right?
>
>
> I can edit and modify those file and persist them, where is this saved? In my case it looks modified stuff shows
> up in barebox.env in my /boot.
>
> Especially my question is, when I add a boot entry compiled in, the boot.default variable should get this entry
> and this must be reset/default compiled-in, how is this done?
>
> My second issue is, currently I need to apply two dtbo files to the kernel booting, how do I do this in barebox?
>
> In u-boot this looks like
>
> uboot_overlay_addr0=/lib/firmware/BB-UART1-00A0.dtbo
> uboot_overlay_addr1=/lib/firmware/BB-UART4-00A0.dtbo
>
> in uEnv.txt, I did not find a pendant in the barebox world yet.
You could add a bootspec file with
devicetree-overlay BB-UART1-00A0.dtbo BB-UART4-00A0.dtbo
If you want the overlay application to happen in the bootloader, but
decide the overlay selection policy in userspace.
> The capemgr/slot kernel commandline stuff is
> deprecated, right?
>
>
>
>
> INSIDE M2M GmbH
> Konstantin Kletschke
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> 30823 Garbsen
>
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>
> konstantin.kletschke@inside-m2m.de
> http://www.inside-m2m.de
>
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>
>
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next prev parent reply other threads:[~2021-06-18 6:56 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-06-16 8:10 Konstantin Kletschke
2021-06-16 12:34 ` Sascha Hauer
2021-06-16 15:57 ` Konstantin Kletschke
2021-06-16 19:55 ` Trent Piepho
2021-06-18 12:43 ` Konstantin Kletschke
2021-06-17 6:41 ` Sascha Hauer
2021-06-18 13:15 ` Konstantin Kletschke
2021-06-21 4:01 ` Sascha Hauer
2021-06-21 14:21 ` Konstantin Kletschke
2021-06-22 10:40 ` Konstantin Kletschke
2021-06-18 6:48 ` Ahmad Fatoum [this message]
2021-06-18 13:16 ` Konstantin Kletschke
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