Re: [PATCH v2 1/6] dt-bindings: Document the SYSREG specific compatibles found on FSD SoC

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On Thu, Nov 10, 2022 at 04:48:03PM +0530, Vivek Yadav wrote:
> 
> 
> > -----Original Message-----
> > From: Krzysztof Kozlowski <krzysztof.kozlowski@xxxxxxxxxx>
> > Sent: 09 November 2022 16:39
> > To: Vivek Yadav <vivek.2311@xxxxxxxxxxx>; rcsekar@xxxxxxxxxxx;
> > krzysztof.kozlowski+dt@xxxxxxxxxx; wg@xxxxxxxxxxxxxx;
> > mkl@xxxxxxxxxxxxxx; davem@xxxxxxxxxxxxx; edumazet@xxxxxxxxxx;
> > kuba@xxxxxxxxxx; pabeni@xxxxxxxxxx; pankaj.dubey@xxxxxxxxxxx;
> > ravi.patel@xxxxxxxxxxx; alim.akhtar@xxxxxxxxxxx; linux-fsd@xxxxxxxxx;
> > robh+dt@xxxxxxxxxx
> > Cc: linux-can@xxxxxxxxxxxxxxx; netdev@xxxxxxxxxxxxxxx; linux-
> > kernel@xxxxxxxxxxxxxxx; linux-arm-kernel@xxxxxxxxxxxxxxxxxxx; linux-
> > samsung-soc@xxxxxxxxxxxxxxx; devicetree@xxxxxxxxxxxxxxx;
> > aswani.reddy@xxxxxxxxxxx; sriranjani.p@xxxxxxxxxxx
> > Subject: Re: [PATCH v2 1/6] dt-bindings: Document the SYSREG specific
> > compatibles found on FSD SoC
> > 
> > On 09/11/2022 11:09, Vivek Yadav wrote:
> > > From: Sriranjani P <sriranjani.p@xxxxxxxxxxx>
> > >
> > 
> > Use subject prefixes matching the subsystem (git log --oneline -- ...).
> > 
> Okay, I will add the correct prefixes.
> > > Describe the compatible properties for SYSREG controllers found on FSD
> > > SoC.
> > 
> > This is ARM SoC patch, split it from the patchset.
> >
> I understand this patch is not to be subset of CAN patches, I will send these patches separately.
> These patches will be used by EQos patches. As per reference, I am adding the Address link.
> https://lore.kernel.org/all/20221104120517.77980-1-sriranjani.p@xxxxxxxxxxx/
>  
> > >
> > > Signed-off-by: Alim Akhtar <alim.akhtar@xxxxxxxxxxx>
> > > Signed-off-by: Pankaj Kumar Dubey <pankaj.dubey@xxxxxxxxxxx>
> > > Signed-off-by: Ravi Patel <ravi.patel@xxxxxxxxxxx>
> > > Signed-off-by: Vivek Yadav <vivek.2311@xxxxxxxxxxx>
> > > Cc: devicetree@xxxxxxxxxxxxxxx
> > > Cc: Krzysztof Kozlowski <krzysztof.kozlowski+dt@xxxxxxxxxx>
> > > Cc: Rob Herring <robh+dt@xxxxxxxxxx>
> > 
> > Drop the Cc list from commit log. It's not helpful.
> > 
> Okay, I will remove.
> > > Signed-off-by: Sriranjani P <sriranjani.p@xxxxxxxxxxx>
> > > ---
> > >  .../devicetree/bindings/arm/tesla-sysreg.yaml | 50
> > +++++++++++++++++++
> > >  MAINTAINERS                                   |  1 +
> > >  2 files changed, 51 insertions(+)
> > >  create mode 100644
> > > Documentation/devicetree/bindings/arm/tesla-sysreg.yaml
> > >
> > > diff --git a/Documentation/devicetree/bindings/arm/tesla-sysreg.yaml
> > > b/Documentation/devicetree/bindings/arm/tesla-sysreg.yaml
> > > new file mode 100644
> > > index 000000000000..bbcc6dd75918
> > > --- /dev/null
> > > +++ b/Documentation/devicetree/bindings/arm/tesla-sysreg.yaml
> > 
> > arm is only for top level stuff. This goes to soc under tesla or samsung
> > directory.
> > 
> Okay, this is specific to Samsung fsd SoC, I will be moving this file to arm/samsung in next patch series. Hope that is fine.
> > > @@ -0,0 +1,50 @@
> > > +# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause %YAML 1.2
> > > +---
> > > +$id:
> > > +https://protect2.fireeye.com/v1/url?k=1ad2834a-7b59967c-1ad30805-
> > 000b
> > > +abff9b5d-1f65584e412e916c&q=1&e=a870a282-632a-4896-ae53-
> > 3ecb50f02be5&
> > > +u=http%3A%2F%2Fdevicetree.org%2Fschemas%2Farm%2Ftesla-
> > sysreg.yaml%23
> > > +$schema:
> > > +https://protect2.fireeye.com/v1/url?k=13876e33-720c7b05-1386e57c-
> > 000b
> > > +abff9b5d-edae3ff711999305&q=1&e=a870a282-632a-4896-ae53-
> > 3ecb50f02be5&
> > > +u=http%3A%2F%2Fdevicetree.org%2Fmeta-schemas%2Fcore.yaml%23
> > > +
> > > +title: Tesla Full Self-Driving platform's system registers
> > > +
> > > +maintainers:
> > > +  - Alim Akhtar <alim.akhtar@xxxxxxxxxxx>
> > > +
> > > +description: |
> > > +  This is a system control registers block, providing multiple low
> > > +level
> > > +  platform functions like board detection and identification,
> > > +software
> > > +  interrupt generation.
> > > +
> > > +properties:
> > > +  compatible:
> > > +    oneOf:
> > 
> > No need for oneOf.
> > 
> Removing this results into dt_binding_check error, so this is required.
> > > +      - items:
> > > +          - enum:
> > > +              - tesla,sysreg_fsys0
> > > +              - tesla,sysreg_peric
> > 
> > From where did you get underscores in compatibles?
> > 
> I have seen in MCAN Driver <drivers/net/can/m_can/m_can_platform.c> and also too many other yaml files.
> Do you have any ref standard guideline of compatible which says underscore is not allowed.

Section 2.3.1 defining 'compatible' in the DT spec:

The compatible string should consist only of lowercase letters, digits  
and dashes, and should start with a letter. A single comma is typically 
only used following a vendor prefix. Underscores should not be used.



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