[PATCH 0/5] edison: Support for writing an xFSTK image

[Tom Rini]

On Mon, Sep 07, 2020 at 07:57:12AM -0600, Simon Glass wrote:
> Hi Andy,
> 
> On Mon, 7 Sep 2020 at 02:04, Andy Shevchenko <andy.shevchenko at gmail.com> wrote:
> >
> > On Sat, Sep 5, 2020 at 6:23 AM Simon Glass <sjg at chromium.org> wrote:
> > > On Fri, 4 Sep 2020 at 03:46, Andy Shevchenko
> > > <andriy.shevchenko at linux.intel.com> wrote:
> > > > On Thu, Sep 03, 2020 at 07:28:51PM -0600, Simon Glass wrote:
> >
> > > I do have a question though. How does the board decide whether to wait
> > > for the xFSTK tool to connect? Sometimes when I reset it it, it does.
> > > Sometimes it goes straight into receiving application. I am not
> > > pressing any button other than reset. Once it makes it mind up, it
> > > seems to stick to it until the power is removed? But it is powered by
> > > USB too, so removing power is not so easy.
> >
> > It's a good question. I don't know the answer unfortunately. I think
> > the parties that are involved here are PMIC and thus its firmware (I
> > don't have access to it and even if ask will not get), DnX protocol,
> > USB implementation on IFWI level (no access to me either). And I truly
> > believe there are bugs in all of them, though I dunno if they are
> > related to the above behaviour.
> > Btw, pressing the reset button helps?
> 
> Pressing reset either boots quickly or waits 10 seconds for xFSTK to
> connect. It's like cracking a code and I haven't cracked it yet. I'll
> have another go at some point, and maybe finally get this board into
> my lab.

On a tangent, when it comes to lab stuff I picked up
https://www.yepkit.com/products/ykush a while back precisely for "device
can be USB powered on purpose/accident" in order to have
software-controlled USB ports I can bring up/down.

-- 
Tom
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