[U-Boot] can u-boot tools fw_{printenv, setenv} work with eMMC HW partition?

[Robert P. J. Day]

On Sat, 24 Aug 2013, Luka Perkov wrote:

> On Fri, Aug 23, 2013 at 05:11:01PM -0400, Robert P. J. Day wrote:
> > On Fri, 23 Aug 2013, Luka Perkov wrote:
> >
> > > On Fri, Aug 23, 2013 at 08:25:07AM -0400, Robert P. J. Day wrote:
> > > >   i'm sure there's a simple answer to this -- i built u-boot for my
> > > > beaglebone black using the "am335x_boneblack" config, which supports
> > > > saving env info to the eMMC HW partition boot1. but now that it's
> > > > there, is there a way i can manipulate that info with fw_printenv and
> > > > fw_setenv?
> > >
> > > I have put this in OpenWrt:
> > >
> > > https://dev.openwrt.org/browser/trunk/package/boot/uboot-envtools/patches/110-add-support-for-MTD_ABSENT.patch
> > > https://dev.openwrt.org/browser/trunk/package/boot/uboot-envtools/patches/115-writing-environment-for-mtd-devices.patch
> > >
> > > With those two you will be able to use fw_{printenv,setenv} on MMC
> > > devices.
> >
> >   i'll get a chance to test the above this weekend, but i just want to
> > make absolutely sure we're talking about the same thing. are you
> > saying that with the above patches, the u-boot-tools will be able to
> > manipulate an eMMC HW partition just as easily as a regular MTD
> > partition?
>
> Yes.
>
> > and, if so, what is the format of the entry one would add
> > to /etc/fw_env.config to refer to that eMMC HW partition (in this
> > case, boot1)?
>
> I have done this for imx6 wandboard in OpenWrt:
>
> https://dev.openwrt.org/browser/trunk/package/boot/uboot-envtools/files/imx6
>
> So example config would look like:
>
> /dev/mmcblk0 0x60000 0x2000 0x2000

  ah, there's the misunderstanding. i thought we were discussing how
to be able to refer *directly* to the eMMC partition "boot1", as in
/dev/mmcblk1boot1. it looks like what you're describing would refer
instead simply to /dev/mmcblk1, correct?

rday

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Robert P. J. Day                                 Ottawa, Ontario, CANADA
                        http://crashcourse.ca

Twitter:                                       http://twitter.com/rpjday
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