[PATCH 0/2] spi: imx: don't loop endlessly

[Uwe Kleine-König]

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/  |