u-boot saveenv to redundant fat does not persist env

[Tom Rini]

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
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