From: "Uwe Kleine-König" <u.kleine-koenig@pengutronix.de>
To: Sam Ravnborg <sam@ravnborg.org>
Cc: barebox@lists.infradead.org
Subject: Re: [PATCH 0/2] spi: imx: don't loop endlessly
Date: Thu, 3 Aug 2017 11:07:25 +0200 [thread overview]
Message-ID: <20170803090725.knqzwxxroyvgcvwn@pengutronix.de> (raw)
In-Reply-To: <20170802203240.GA21641@ravnborg.org>
On Wed, Aug 02, 2017 at 10:32:40PM +0200, Sam Ravnborg wrote:
> Hi Uwe.
> > I havn't looked at it, but it is included in my barebox as I'm using
> > 2017.08.0 + some patches.
> And I did not expect it to solve your problem, only to give you
> inspiration what could be the issue.
>
> >
> > Reading through the patch description, it doesn't match my situation.
> OK
>
> > I'm doing USB-Booting because when I made eMMC work all my available
> > remote hands already called it a day. So unless the boot ROM does
> > something strange (impossible!) barebox is the first spi user.
> >
> > What seems to be similar is that TESTREG.TXCNT is != 0. For me this
> > smells clk-related. On i.MX6 I recently identified a problem (but didn't
> > come around yet to mainline a fix) that might match at least your
> > problem.
> >
> > Can you still reproduce?
> We have used the patch from Sascha for a long time now (from before it
> hit barebox-next, and on our proprietary IMX6 target we never
> saw the SPI related error since.
>
> Sam
>
> > How does your clk-tree look like (clk_dump)?
>
> This is with:
> $ version
> barebox 2017.03.0-1 #1 Sun May 14 16:17:24 CEST 2017
> + some of our own patches (nothing clk related).
Which SoC are you using? Doesn't seem to match my problem. I don't know
what Sascha did, I'd route ecspi_root to cko2 and check if there is a
clk in the failing situation. (Assuming that pin is accessible on your
machine of course.)
Best regards
Uwe
--
Pengutronix e.K. | Uwe Kleine-König |
Industrial Linux Solutions | http://www.pengutronix.de/ |
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next prev parent reply other threads:[~2017-08-03 9:07 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-08-02 19:39 Uwe Kleine-König
2017-08-02 19:39 ` [PATCH 1/2] spi: imx: add error checking Uwe Kleine-König
2017-08-02 19:39 ` [PATCH 2/2] spi: imx: add timeout to xchg_single Uwe Kleine-König
2017-08-02 19:54 ` [PATCH 0/2] spi: imx: don't loop endlessly Sam Ravnborg
2017-08-02 20:19 ` Uwe Kleine-König
2017-08-02 20:32 ` Sam Ravnborg
2017-08-03 9:07 ` Uwe Kleine-König [this message]
2017-08-03 10:43 ` Sam Ravnborg
2017-08-03 18:41 ` Uwe Kleine-König
2017-09-29 18:08 ` Alexander Kurz
2017-10-02 5:31 ` Uwe Kleine-König
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