linux-kernel - Re: [RFC 0/6] mmc: Field Firmware Update

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Date:	Tue, 22 Dec 2015 09:15:21 +0100
From:	Holger Schurig <holgerschurig@...il.com>
To:	Ulf Hansson <ulf.hansson@...aro.org>
Cc:	Avi Shchislowski <Avi.Shchislowski@...disk.com>,
	"linux-mmc\@vger.kernel.org" <linux-mmc@...r.kernel.org>,
	"linux-kernel\@vger.kernel.org" <linux-kernel@...r.kernel.org>,
	Alex Lemberg <Alex.Lemberg@...disk.com>,
	Chris Ball <chris@...ntf.net>,
	Baolin Wang <baolin.wang@...aro.org>
Subject: Re: [RFC 0/6] mmc: Field Firmware Update

> Sorry for the delay.

No problem, I was busy with many other projects as well.

> My advise right now is to try this out via the mmc ioctl in userspace,
> yes. Although, if you encounter any issues with that approach that it
> might not be reliable, I am open to look into the in-kernel solution
> again.

I managed to update my Kingston eMMCs with a slighly modified patch to
what I submitted. I however didn't bother to submit this, as I saw no
chance of getting it applied.

Also I once asked in the mailing list if there is some user-space
example of how to use the multi-block feature that is supposed to enable
this, but I haven't gotten an answer.

> Regarding mmc-utils as where I recommend you to implement this, I have
> been thinking of moving this tool into the tools directory in the
> kernel.

Sounds good to me.

Remotely related:

Do you know that some google people made their own version of mmc-utils
for ChromeOS? And the don't seem to give much effort in unification of
them?  As if the world wouldn't know how hard it can be to re-unite
things again, Google should know from their custom kernels they use on
Android ...  Sigh.

So you can

* git clone git://git.kernel.org/pub/scm/linux/kernel/git/cjb/mmc-utils.git
* git clone https://chromium.googlesource.com/chromiumos/third_party/mmc-utils

currently.

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