[PATCH] dt-bindings: omap: Add TI Pandaboard A4 variant

[PATCH] dt-bindings: omap: Add TI Pandaboard A4 variant

[Tom Rini]

Document the ti,omap4-panda-a4 compatible string in the appropriate
place within the omap family binding file.

Signed-off-by: Tom Rini <trini@konsulko.com>
---
Cc: Aaro Koskinen <aaro.koskinen@iki.fi>
Cc: Andreas Kemnade <andreas@kemnade.info>
Cc: Kevin Hilman <khilman@baylibre.com>
Cc: Roger Quadros <rogerq@kernel.org>
Cc: Tony Lindgren <tony@atomide.com>
Cc: Rob Herring <robh@kernel.org>
Cc: Krzysztof Kozlowski <krzk+dt@kernel.org>
Cc: Conor Dooley <conor+dt@kernel.org>
Cc: linux-omap@vger.kernel.org
Cc: devicetree@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
---
 Documentation/devicetree/bindings/arm/ti/omap.yaml | 1 +
 1 file changed, 1 insertion(+)

diff --git a/Documentation/devicetree/bindings/arm/ti/omap.yaml b/Documentation/devicetree/bindings/arm/ti/omap.yaml
index 93e04a109a12..28e23ca766b4 100644
--- a/Documentation/devicetree/bindings/arm/ti/omap.yaml
+++ b/Documentation/devicetree/bindings/arm/ti/omap.yaml
@@ -137,6 +137,7 @@ properties:
               - motorola,xyboard-mz609
               - motorola,xyboard-mz617
               - ti,omap4-panda
+              - ti,omap4-panda-a4
               - ti,omap4-sdp
           - const: ti,omap4430
           - const: ti,omap4
-- 
2.43.0

Re: [PATCH] dt-bindings: omap: Add TI Pandaboard A4 variant

[Andreas Kemnade]

Am Tue, 21 Jan 2025 18:12:40 -0600
schrieb Tom Rini <trini@konsulko.com>:

> Document the ti,omap4-panda-a4 compatible string in the appropriate
> place within the omap family binding file.
> 
> Signed-off-by: Tom Rini <trini@konsulko.com>
> ---
> Cc: Aaro Koskinen <aaro.koskinen@iki.fi>
> Cc: Andreas Kemnade <andreas@kemnade.info>
> Cc: Kevin Hilman <khilman@baylibre.com>
> Cc: Roger Quadros <rogerq@kernel.org>
> Cc: Tony Lindgren <tony@atomide.com>
> Cc: Rob Herring <robh@kernel.org>
> Cc: Krzysztof Kozlowski <krzk+dt@kernel.org>
> Cc: Conor Dooley <conor+dt@kernel.org>
> Cc: linux-omap@vger.kernel.org
> Cc: devicetree@vger.kernel.org
> Cc: linux-kernel@vger.kernel.org
> ---
>  Documentation/devicetree/bindings/arm/ti/omap.yaml | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/Documentation/devicetree/bindings/arm/ti/omap.yaml b/Documentation/devicetree/bindings/arm/ti/omap.yaml
> index 93e04a109a12..28e23ca766b4 100644
> --- a/Documentation/devicetree/bindings/arm/ti/omap.yaml
> +++ b/Documentation/devicetree/bindings/arm/ti/omap.yaml
> @@ -137,6 +137,7 @@ properties:
>                - motorola,xyboard-mz609
>                - motorola,xyboard-mz617
>                - ti,omap4-panda
> +              - ti,omap4-panda-a4
>                - ti,omap4-sdp
>            - const: ti,omap4430
>            - const: ti,omap4

This allows compatible = "ti,omap4-panda-a4", "ti,omap4430", "ti,omap4"

According to your other patch, you want
compatible = "ti,omap4-panda-a4", "ti,omap4-panda", "ti,omap4430",
"ti,omap4"

so you need a construction similar to the "ti,omap3-beagle-ab4"


Regards,
Andreas

Re: [PATCH] dt-bindings: omap: Add TI Pandaboard A4 variant

[Krzysztof Kozlowski]

On 22/01/2025 01:12, Tom Rini wrote:
> Document the ti,omap4-panda-a4 compatible string in the appropriate
> place within the omap family binding file.

Why? Where is any user of this? Your commit msg should explain this,
because it's not obvious. Obvious is to send binding with the user, but
the second patch is missing.

Best regards,
Krzysztof

Re: [PATCH] dt-bindings: omap: Add TI Pandaboard A4 variant

[Tom Rini]

On Wed, Jan 22, 2025 at 09:36:29AM +0100, Krzysztof Kozlowski wrote:
> On 22/01/2025 01:12, Tom Rini wrote:
> > Document the ti,omap4-panda-a4 compatible string in the appropriate
> > place within the omap family binding file.
> 
> Why? Where is any user of this? Your commit msg should explain this,
> because it's not obvious. Obvious is to send binding with the user, but
> the second patch is missing.

You were cc'd on
https://lore.kernel.org/all/20250121200749.4131923-1-trini@konsulko.com/

-- 
Tom

Re: [PATCH] dt-bindings: omap: Add TI Pandaboard A4 variant

[Tom Rini]

On Wed, Jan 22, 2025 at 09:32:36AM +0100, Andreas Kemnade wrote:
> Am Tue, 21 Jan 2025 18:12:40 -0600
> schrieb Tom Rini <trini@konsulko.com>:
> 
> > Document the ti,omap4-panda-a4 compatible string in the appropriate
> > place within the omap family binding file.
> > 
> > Signed-off-by: Tom Rini <trini@konsulko.com>
> > ---
> > Cc: Aaro Koskinen <aaro.koskinen@iki.fi>
> > Cc: Andreas Kemnade <andreas@kemnade.info>
> > Cc: Kevin Hilman <khilman@baylibre.com>
> > Cc: Roger Quadros <rogerq@kernel.org>
> > Cc: Tony Lindgren <tony@atomide.com>
> > Cc: Rob Herring <robh@kernel.org>
> > Cc: Krzysztof Kozlowski <krzk+dt@kernel.org>
> > Cc: Conor Dooley <conor+dt@kernel.org>
> > Cc: linux-omap@vger.kernel.org
> > Cc: devicetree@vger.kernel.org
> > Cc: linux-kernel@vger.kernel.org
> > ---
> >  Documentation/devicetree/bindings/arm/ti/omap.yaml | 1 +
> >  1 file changed, 1 insertion(+)
> > 
> > diff --git a/Documentation/devicetree/bindings/arm/ti/omap.yaml b/Documentation/devicetree/bindings/arm/ti/omap.yaml
> > index 93e04a109a12..28e23ca766b4 100644
> > --- a/Documentation/devicetree/bindings/arm/ti/omap.yaml
> > +++ b/Documentation/devicetree/bindings/arm/ti/omap.yaml
> > @@ -137,6 +137,7 @@ properties:
> >                - motorola,xyboard-mz609
> >                - motorola,xyboard-mz617
> >                - ti,omap4-panda
> > +              - ti,omap4-panda-a4
> >                - ti,omap4-sdp
> >            - const: ti,omap4430
> >            - const: ti,omap4
> 
> This allows compatible = "ti,omap4-panda-a4", "ti,omap4430", "ti,omap4"
> 
> According to your other patch, you want
> compatible = "ti,omap4-panda-a4", "ti,omap4-panda", "ti,omap4430",
> "ti,omap4"
> 
> so you need a construction similar to the "ti,omap3-beagle-ab4"

Do you mean the order should change, or it should be an enum? I'm not
sure where this is documented (the $id and $schema values in the file
are just 404s so I guess not something to read directly?).

-- 
Tom

Re: [PATCH] dt-bindings: omap: Add TI Pandaboard A4 variant

[Krzysztof Kozlowski]

On 22/01/2025 15:17, Tom Rini wrote:
> On Wed, Jan 22, 2025 at 09:36:29AM +0100, Krzysztof Kozlowski wrote:
>> On 22/01/2025 01:12, Tom Rini wrote:
>>> Document the ti,omap4-panda-a4 compatible string in the appropriate
>>> place within the omap family binding file.
>>
>> Why? Where is any user of this? Your commit msg should explain this,
>> because it's not obvious. Obvious is to send binding with the user, but
>> the second patch is missing.
> 
> You were cc'd on
> https://lore.kernel.org/all/20250121200749.4131923-1-trini@konsulko.com/
I am cc-ed on 200 patches per day and it means nothing. Do you expect me
to look for missing user in 1000 patches per week, for every 1000
patches? Or how does it supposed to work?

But regardless, the majority of review is done via patchwork and that
DTS patch was not in that thread. It's missing.

You are supposed to send the binding and the user DTS in the same
patchset. Separate makes little sense in case of kernel.

If you need the binding for other projects, then of course above changes
into: always reference the other project submission.


Best regards,
Krzysztof

Re: [PATCH] dt-bindings: omap: Add TI Pandaboard A4 variant

[Tom Rini]

On Wed, Jan 22, 2025 at 04:08:27PM +0100, Krzysztof Kozlowski wrote:
> On 22/01/2025 15:17, Tom Rini wrote:
> > On Wed, Jan 22, 2025 at 09:36:29AM +0100, Krzysztof Kozlowski wrote:
> >> On 22/01/2025 01:12, Tom Rini wrote:
> >>> Document the ti,omap4-panda-a4 compatible string in the appropriate
> >>> place within the omap family binding file.
> >>
> >> Why? Where is any user of this? Your commit msg should explain this,
> >> because it's not obvious. Obvious is to send binding with the user, but
> >> the second patch is missing.
> > 
> > You were cc'd on
> > https://lore.kernel.org/all/20250121200749.4131923-1-trini@konsulko.com/
> I am cc-ed on 200 patches per day and it means nothing. Do you expect me
> to look for missing user in 1000 patches per week, for every 1000
> patches? Or how does it supposed to work?

Being an overwhelmed maintainer sucks, I really do get that, sorry for
my short reply.

> But regardless, the majority of review is done via patchwork and that
> DTS patch was not in that thread. It's missing.
> 
> You are supposed to send the binding and the user DTS in the same
> patchset. Separate makes little sense in case of kernel.
> 
> If you need the binding for other projects, then of course above changes
> into: always reference the other project submission.

It's fixing a 10 year old regression where the equally viable option is
to just delete the dts file as I'm 99.9% sure no one has even tried
using it in that time.

-- 
Tom

Re: [PATCH] dt-bindings: omap: Add TI Pandaboard A4 variant

[Andreas Kemnade]

Am Wed, 22 Jan 2025 08:20:58 -0600
schrieb Tom Rini <trini@konsulko.com>:

> On Wed, Jan 22, 2025 at 09:32:36AM +0100, Andreas Kemnade wrote:
> > Am Tue, 21 Jan 2025 18:12:40 -0600
> > schrieb Tom Rini <trini@konsulko.com>:
> >   
> > > Document the ti,omap4-panda-a4 compatible string in the appropriate
> > > place within the omap family binding file.
> > > 
> > > Signed-off-by: Tom Rini <trini@konsulko.com>
> > > ---
> > > Cc: Aaro Koskinen <aaro.koskinen@iki.fi>
> > > Cc: Andreas Kemnade <andreas@kemnade.info>
> > > Cc: Kevin Hilman <khilman@baylibre.com>
> > > Cc: Roger Quadros <rogerq@kernel.org>
> > > Cc: Tony Lindgren <tony@atomide.com>
> > > Cc: Rob Herring <robh@kernel.org>
> > > Cc: Krzysztof Kozlowski <krzk+dt@kernel.org>
> > > Cc: Conor Dooley <conor+dt@kernel.org>
> > > Cc: linux-omap@vger.kernel.org
> > > Cc: devicetree@vger.kernel.org
> > > Cc: linux-kernel@vger.kernel.org
> > > ---
> > >  Documentation/devicetree/bindings/arm/ti/omap.yaml | 1 +
> > >  1 file changed, 1 insertion(+)
> > > 
> > > diff --git a/Documentation/devicetree/bindings/arm/ti/omap.yaml b/Documentation/devicetree/bindings/arm/ti/omap.yaml
> > > index 93e04a109a12..28e23ca766b4 100644
> > > --- a/Documentation/devicetree/bindings/arm/ti/omap.yaml
> > > +++ b/Documentation/devicetree/bindings/arm/ti/omap.yaml
> > > @@ -137,6 +137,7 @@ properties:
> > >                - motorola,xyboard-mz609
> > >                - motorola,xyboard-mz617
> > >                - ti,omap4-panda
> > > +              - ti,omap4-panda-a4
> > >                - ti,omap4-sdp
> > >            - const: ti,omap4430
> > >            - const: ti,omap4  
> > 
> > This allows compatible = "ti,omap4-panda-a4", "ti,omap4430", "ti,omap4"
> > 
> > According to your other patch, you want
> > compatible = "ti,omap4-panda-a4", "ti,omap4-panda", "ti,omap4430",
> > "ti,omap4"
> > 
> > so you need a construction similar to the "ti,omap3-beagle-ab4"  
> 
> Do you mean the order should change, or it should be an enum? I'm not
> sure where this is documented (the $id and $schema values in the file
> are just 404s so I guess not something to read directly?).
> 
you would need a block like this:

      - description: Early Pandaboard revision A4
        items:
          - const: ti,omap4-panda-a4
          - const: ti,omap4-panda
          - const: ti,omap4430
          - const: ti,omap4


Regards,
Andreas

Re: [PATCH] dt-bindings: omap: Add TI Pandaboard A4 variant

[Robert Nelson]

On Wed, Jan 22, 2025 at 4:20 PM Andreas Kemnade <andreas@kemnade.info> wrote:
>
> Am Wed, 22 Jan 2025 08:20:58 -0600
> schrieb Tom Rini <trini@konsulko.com>:
>
> > On Wed, Jan 22, 2025 at 09:32:36AM +0100, Andreas Kemnade wrote:
> > > Am Tue, 21 Jan 2025 18:12:40 -0600
> > > schrieb Tom Rini <trini@konsulko.com>:
> > >
> > > > Document the ti,omap4-panda-a4 compatible string in the appropriate
> > > > place within the omap family binding file.
> > > >
> > > > Signed-off-by: Tom Rini <trini@konsulko.com>
> > > > ---
> > > > Cc: Aaro Koskinen <aaro.koskinen@iki.fi>
> > > > Cc: Andreas Kemnade <andreas@kemnade.info>
> > > > Cc: Kevin Hilman <khilman@baylibre.com>
> > > > Cc: Roger Quadros <rogerq@kernel.org>
> > > > Cc: Tony Lindgren <tony@atomide.com>
> > > > Cc: Rob Herring <robh@kernel.org>
> > > > Cc: Krzysztof Kozlowski <krzk+dt@kernel.org>
> > > > Cc: Conor Dooley <conor+dt@kernel.org>
> > > > Cc: linux-omap@vger.kernel.org
> > > > Cc: devicetree@vger.kernel.org
> > > > Cc: linux-kernel@vger.kernel.org
> > > > ---
> > > >  Documentation/devicetree/bindings/arm/ti/omap.yaml | 1 +
> > > >  1 file changed, 1 insertion(+)
> > > >
> > > > diff --git a/Documentation/devicetree/bindings/arm/ti/omap.yaml b/Documentation/devicetree/bindings/arm/ti/omap.yaml
> > > > index 93e04a109a12..28e23ca766b4 100644
> > > > --- a/Documentation/devicetree/bindings/arm/ti/omap.yaml
> > > > +++ b/Documentation/devicetree/bindings/arm/ti/omap.yaml
> > > > @@ -137,6 +137,7 @@ properties:
> > > >                - motorola,xyboard-mz609
> > > >                - motorola,xyboard-mz617
> > > >                - ti,omap4-panda
> > > > +              - ti,omap4-panda-a4
> > > >                - ti,omap4-sdp
> > > >            - const: ti,omap4430
> > > >            - const: ti,omap4
> > >
> > > This allows compatible = "ti,omap4-panda-a4", "ti,omap4430", "ti,omap4"
> > >
> > > According to your other patch, you want
> > > compatible = "ti,omap4-panda-a4", "ti,omap4-panda", "ti,omap4430",
> > > "ti,omap4"
> > >
> > > so you need a construction similar to the "ti,omap3-beagle-ab4"
> >
> > Do you mean the order should change, or it should be an enum? I'm not
> > sure where this is documented (the $id and $schema values in the file
> > are just 404s so I guess not something to read directly?).
> >
> you would need a block like this:
>
>       - description: Early Pandaboard revision A4
>         items:
>           - const: ti,omap4-panda-a4
>           - const: ti,omap4-panda
>           - const: ti,omap4430
>           - const: ti,omap4

Here's a good table:

https://omappedia.com/wiki/PandaBoard_Revisions#PandaBoard_Revision_History:

The A4 was actually 'late' in the Pandaboard life, sadly the
PandaBoard.org domain went down years ago with no real backup..

The biggest A4 change i've been able to dig up was a change of the i2c
pull ups on the hdmi bus:

https://git.ti.com/gitweb?p=ti-linux-kernel/ti-linux-kernel.git;a=blob;f=arch/arm/boot/dts/omap4-panda-a4.dts;h=f1a6476af3716489007c12141d06f208ec2ebc94;hb=refs/heads/ti-linux-4.14.y

I don't believe I ever saw an A5/A6 in my hands.

Since Panda pre-dates device-tree's normally these would have been named:

ti,omap4-panda-a2 (first production)
ti,omap4-panda-a4

But with this new thing called "device-tree" the A2 got
`ti,omap4-panda` and the newer A4 got `ti,omap4-panda-a4`...

Regards,

-- 
Robert Nelson
https://rcn-ee.com/