Date:   Tue, 6 Sep 2022 09:24:24 +0200
From:   Pali Rohár <pali@...nel.org>
To:     Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
Cc:     Florian Fainelli <f.fainelli@...il.com>,
        Andrew Lunn <andrew@...n.ch>,
        Gregory Clement <gregory.clement@...tlin.com>,
        Sebastian Hesselbarth <sebastian.hesselbarth@...il.com>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Marek Behun <marek.behun@....cz>,
        linux-arm-kernel@...ts.infradead.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] ARM: dts: turris-omnia: Add mcu node

On Tuesday 06 September 2022 08:34:42 Krzysztof Kozlowski wrote:
> On 05/09/2022 19:12, Pali Rohár wrote:
> > On Monday 05 September 2022 18:34:48 Krzysztof Kozlowski wrote:
> >> On 05/09/2022 18:19, Florian Fainelli wrote:
> >>>
> >>>
> >>> On 9/3/2022 8:27 AM, Pali Rohár wrote:
> >>>> On Friday 02 September 2022 00:45:58 Andrew Lunn wrote:
> >>>>> On Wed, Aug 31, 2022 at 04:28:09PM +0200, Pali Rohár wrote:
> >>>>>> PING?
> >>>>>>
> >>>>>> On Friday 19 August 2022 15:11:52 Pali Rohár wrote:
> >>>>>>> At i2c address 0x2a is MCU command interface which provides access to GPIOs
> >>>>>>> connected to Turris Omnia MCU. So define mcu node in Turris Omnia DTS file.
> >>>>>>>
> >>>>>>> Signed-off-by: Pali Rohár <pali@...nel.org>
> >>>>>>>
> >>>>>>> ---
> >>>>>>> Same change was already sent to U-Boot project together with driver. As
> >>>>>>> Turris Omnia DTS file is shared between Linux kernel U-Boot, I'm sending
> >>>>>>> this change also in Linux. There is a plan to write also Linux driver for
> >>>>>>> Turris Omnia MCU, like there is already in U-Boot.
> >>>>>>>
> >>>>>>> https://source.denx.de/u-boot/u-boot/-/commit/832738974806e6264a3d0ac2aaa92d0f662fd128
> >>>>>>> https://source.denx.de/u-boot/u-boot/-/blob/master/drivers/gpio/turris_omnia_mcu.c
> >>>>>>> ---
> >>>>>>>   arch/arm/boot/dts/armada-385-turris-omnia.dts | 8 +++++++-
> >>>>>>>   1 file changed, 7 insertions(+), 1 deletion(-)
> >>>>>>>
> >>>>>>> diff --git a/arch/arm/boot/dts/armada-385-turris-omnia.dts b/arch/arm/boot/dts/armada-385-turris-omnia.dts
> >>>>>>> index f4878df39753..f655e9229d68 100644
> >>>>>>> --- a/arch/arm/boot/dts/armada-385-turris-omnia.dts
> >>>>>>> +++ b/arch/arm/boot/dts/armada-385-turris-omnia.dts
> >>>>>>> @@ -184,7 +184,13 @@
> >>>>>>>   			#size-cells = <0>;
> >>>>>>>   			reg = <0>;
> >>>>>>>   
> >>>>>>> -			/* STM32F0 command interface at address 0x2a */
> >>>>>>> +			/* MCU command i2c API */
> >>>>>>> +			mcu: mcu@2a {
> >>>>>>> +				compatible = "cznic,turris-omnia-mcu";
> >>>>>>> +				reg = <0x2a>;
> >>>>>>> +				gpio-controller;
> >>>>>>> +				#gpio-cells = <3>;
> >>>>>>> +			};
> >>>>>
> >>>>> Please document the binding, preferably in yaml.
> >>>>
> >>>> I'm not going to send any new yaml dt binding document as I see that
> >>>> dt bindings is clearly deprecated project. Either patches for dt
> >>>> bindings are waiting without any answer for months (maybe year?) or
> >>>> patches are ignored/not accepted by beyond reasons or there are request
> >>>> for changes which cannot work on the real hardware or that new yaml
> >>>> cannot be parsed/validated due to ton of bugs in other schemas.
> >>>
> >>> These are some pretty hard statements that are not nearly true, maybe 
> >>> they are based upon your past experience, but Rob and Krysztof provide 
> >>> feedback within a few days at most on DT bindings and DTS files.
> >>
> >> Pali, you wrote in the past that you cannot run one command to install
> >> dtschema ("pip") thus for you this automated testing is
> >> difficult/broken/non working. If running one "pip" command is not
> >> possible, what I can say more? Shall I login to your machine and set it
> >> up? Or did you configure your machine that way, that it is not possible
> >> to run one pip command?
> > 
> > Sorry no, it is too late. I have already lost interested in it. For me
> > it is like a ride on the dead horse.
> > 
> >> Whether the patches are waiting for months and years is difficult to
> >> address to, without actual links. Because for sure you will be able to
> >> find one patch which was missed in our inboxes and you did not get an
> >> answer...  With Rob we both work much more than reasonable/healthy 8h
> >> per day... Yet I recall you always received feedback, just not always
> >> what you expected or wanted.
> > 
> > Now I have replied to one example email without a reaction. 
> 
> Which was not a patch. You asked us for some knowledge and Rob provided
> you answers. Or maybe you think that our job is to solve each technical
> problem of everyone in the world till asking person is happy? Sounds
> like nice job. :)

No and no. You were unhappy with my last patches, so this time I first
send an email asking how to do it prevent sending something which would
be rejected. And now you are saying that it is a technical problem, not
answer. Nice way how to demotivate to try to do any new contribution
into this project area.

> > Another
> > example is this https://github.com/devicetree-org/dt-schema/pull/64
> > which completely blocked any improvements which I proposed in PCIe core
> > code for fixing PCIe state machine. After half of year of waiting I
> > decided to stop any work on this as I see it is dead those schemas.
> 
> It finished with Rob comments, so ball is on your side, isn't it?

Yes, after half o year? And I should continue to wait another half year
for another round? Why? And why should I wait again? Demotivate?

> > Other examples are that received feedback suggest to do change which
> > does not work on the real hardware. So yes, I cannot accept, expect or
> > want something like that. Schema which works in that ultra-supper-duper
> > software but DTS written according to it does not work on the real
> > hardware is for me useless...
> > 
> >> This binding here was never sent to mailing list:
> >> https://lore.kernel.org/all/?q=cznic%2Cturris-omnia-mcu
> >>
> >>>> Sorry, this is just a waste of time and energy to write new those yamls
> >>>> as it does not bring any value.
> >>
> >> It brings quite nice value - allows to check whether your bindings and
> >> your DTS are correct. Any difficulty to install and run dtschema is not
> >> equal to "does not bring any value"...
> > 
> > It just took lot of my time and did nothing useful. Hence for it it has
> > zero value.
> 
> Sorry to hear. When I was very, very small, C also took a lot of my time
> and did nothing useful. Nothing useful in that stage of my knowledge, of
> course.
> 
> 
> Best regards,
> Krzysztof

Seems that you just want to demotivate, nothing more.

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