[U-Boot] [PATCH 0/4] ARM: imx6: DHCOM i.MX6 PDK: Fixing reset

Claudius Heine ch at denx.de
Thu Nov 28 12:56:37 UTC 2019

Hi Harald,

On 28/11/2019 13.34, Harald Seiler wrote:
> Hello Claudius,
> On Thu, 2019-11-28 at 13:06 +0100, Claudius Heine wrote:
>> Hi,
>> currently the reset on the DHCOM i.MX6 board is brocken in u-boot.
>> This patchset fixes that by integrating the sysreset and watchdog dm driver.
> I think you should clarify that reset was broken by commit f2929d11a639
> ("watchdog: imx: Use immediate reset bits for expire_now") which changed
> reset to, by default, only assert the external reset [1].  DHCOM i.MX6
> needs the internal reset though, which previously was asserted as as
> well.  Maybe you can add a `Fixes:` line to one of your commits?

Hmm... Not sure which of the commit should have the 'Fixes' line though,
since each does some part of fixing it. Maybe I should squash them?

> Additionally, I am still unsure whether the current default behavior is
> correct.  I'd rather assert both external and internal reset, which is
> what the i.MX watchdog does on timeout as well (as long as WDT bit is
> set, which we do by default [2]).  There is also an inconsistency
> between the non-DM implementation (external by default) and DM
> implementation (internal by default).

Yes, but that is a separate discussion IMO. This patch just addresses
the stuff for DHCOM does not touch the imx-watchdog driver. Maybe an RFC
patch that fixes the inconsistency might be useful to start it.


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