u-boot saveenv to redundant fat does not persist env

[Tom Rini]

On Wed, Jul 28, 2021 at 05:25:48PM +0200, Pierre-Alexis Ciavaldini wrote:

> Hi,
> 
> When I did, mender complained about it :
> include/config_mender.h:41:3: error: #error CONFIG_SYS_REDUNDAND_ENVIRONMENT is required for Mender to work. Make sure that: 1) All the instructions at https:
> 41 | # error CONFIG_SYS_REDUNDAND_ENVIRONMENT is required for Mender to work. Make sure that: 1) All the instructions at https://docs.mender.io/system-updates-yocto-project/board-integration/bootloader-support/u-boot have been followed. 2) All required layers are included in bblayers.conf, including any board specific layers such as meta-mender-<board>. Check also https://docs.mender.io/troubleshoot/yocto-project-build for Known Issues when upgrading.
> 
> I guess I could disable the check, but even so I'm not sure it would work as uboot.env does not get written ?

Yes, you should disable that check.  Then you can debug the fw_printenv
issue by itself.

> Thank you,
> PA
> 
> On Jul 28 2021, at 5:23 pm, Tom Rini <trini at konsulko.com> wrote:
> > On Wed, Jul 28, 2021 at 04:41:56PM +0200, Pierre-Alexis Ciavaldini wrote:
> >
> > > Hi Tom,
> > >
> > > /etc/fw_env.config has this contents:
> > > /boot/u-boot/uboot.env 0x0000 0x4000
> > > /boot/u-boot/uboot-redund.env 0x0000 0x4000
> >
> > And what if you turn off redundant environment support? Mender does
> > strongly recommend that, but you can just turn it off. Does that get
> > you working environment from file and fw_setenv/fw_printenv working?
> >
> > >
> > > Thank you,
> > > PA
> > >
> > > On Jul 28 2021, at 4:39 pm, Tom Rini <trini at konsulko.com> wrote:
> > > > On Tue, Jul 27, 2021 at 04:44:20PM +0200, Pierre-Alexis Ciavaldini wrote:
> > > > > Hi,
> > > > >
> > > > > I'm trying to integrate u-boot in our project that is a custom scripted build without yocto, for use with mender.
> > > > > The complete discussion can be found here : https://hub.mender.io/t/pi3-usb-boot-support/595/54?u=peac
> > > > > The problem is that when issuing saveenv in u-boot, it responds with "Saving Environment to FAT... OK" but then using fw_printenv in the booted linux, does not show saved variables.
> > > > >
> > > > > The system currently boots because i've tricked it by getting the compiled-in env over uart (env print -a) and made a uboot.env using mkenvimage manually to enable fw_printenv to work.
> > > > > I've noticed that when deleting "/boot/u-boot/uboot.env", u-boot's saveenv does not re-create it, so it seems to me that saveenv does not write uboot.env.
> > > > > Here's the complete project files : https://git.iostud.io/cosmos/u-boot/-/tree/cosmos
> > > > > relevant modified files are:
> > > > > - configs/rpi_4_32b_defconfig
> > > > > - include/config_mender_defines.h
> > > > > - include/env_mender.h
> > > > > - include/configs/rpi.h
> > > > > - include/env_default.h
> > > > > - include/config_mender.h
> > > > >
> > > > > Any help or investigating direction would be greatly appreciated.
> > > >
> > > > What does your /etc/fw_env.config file look like?
> > > > --
> > > > Tom
> > > >
> > >
> >
> > --
> > Tom
> >
> 

-- 
Tom
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