linux-kernel - RE: [PATCH] dt-bindings: arm: altera: convert socfpga-system.txt to yaml

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Message-ID: <BL3PR11MB6532D84A9844761292995EDFA2CBA@BL3PR11MB6532.namprd11.prod.outlook.com>
Date:   Wed, 4 Oct 2023 10:32:08 +0000
From:   "Rabara, Niravkumar L" <niravkumar.l.rabara@...el.com>
To:     Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Conor Dooley <conor+dt@...nel.org>,
        Dinh Nguyen <dinguyen@...nel.org>
CC:     "devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: RE: [PATCH] dt-bindings: arm: altera: convert socfpga-system.txt to
 yaml



> -----Original Message-----
> From: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
> Sent: Wednesday, October 4, 2023 2:46 PM
> To: Rabara, Niravkumar L <niravkumar.l.rabara@...el.com>; Rob Herring
> <robh+dt@...nel.org>; Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>;
> Conor Dooley <conor+dt@...nel.org>; Dinh Nguyen <dinguyen@...nel.org>
> Cc: devicetree@...r.kernel.org; linux-kernel@...r.kernel.org
> Subject: Re: [PATCH] dt-bindings: arm: altera: convert socfpga-system.txt to yaml
> 
> On 04/10/2023 05:07, niravkumar.l.rabara@...el.com wrote:
> > From: Niravkumar L Rabara <niravkumar.l.rabara@...el.com>
> >
> > Convert socfpga-system.txt to altr,sys-mgr.yaml.
> >
> > Signed-off-by: Niravkumar L Rabara <niravkumar.l.rabara@...el.com>
> > ---
> >  .../bindings/arm/altera/altr,sys-mgr.yaml     | 50 +++++++++++++++++++
> >  .../bindings/arm/altera/socfpga-system.txt    | 25 ----------
> >  2 files changed, 50 insertions(+), 25 deletions(-)  create mode
> > 100644 Documentation/devicetree/bindings/arm/altera/altr,sys-mgr.yaml
> 
> arm is only for top-level. What is this this device about? FPGA? SoC?

This is for Altera SoCFPGA System Manager registers, common binding file
for ARM and ARM64 platforms. 
Should I use  "altr,socfpga-sys-mgr.yaml" as per the naming conventions? 

Do you also suggest to move this yaml to different folder instead of 
" Documentation/devicetree/bindings/arm/altera arm/altera/" ?

> 
> 
> >  delete mode 100644
> > Documentation/devicetree/bindings/arm/altera/socfpga-system.txt
> >
> > diff --git
> > a/Documentation/devicetree/bindings/arm/altera/altr,sys-mgr.yaml
> > b/Documentation/devicetree/bindings/arm/altera/altr,sys-mgr.yaml
> > new file mode 100644
> > index 000000000000..8deb70aef664
> > --- /dev/null
> > +++ b/Documentation/devicetree/bindings/arm/altera/altr,sys-mgr.yaml
> > @@ -0,0 +1,50 @@
> > +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) %YAML 1.2
> > +---
> > +$id: http://devicetree.org/schemas/arm/altera/altr,sys-mgr.yaml#
> > +$schema: http://devicetree.org/meta-schemas/core.yaml#
> > +
> > +title: Altera SOCFPGA System Manager
> > +
> > +maintainers:
> > +  - Dinh Nguyen <dinguyen@...nel.org>
> > +
> > +properties:
> > +  compatible:
> > +    oneOf:
> > +      - description: Cyclone5/Arria5/Arria10
> > +        const: altr,sys-mgr
> > +      - description: Stratix10 SoC
> > +        items:
> > +          - const: altr,sys-mgr-s10
> > +          - const: altr,sys-mgr
> 
> That's not what old binding was saying. Please describe in the commit msg
> differences from pure conversion.
> 

Noted. Will update the commit message with below information.

Add platform names in description for clarity. ARM(32-bit) platforms Cyclone5,
Arria5 and Arria10 is using "altr,sys-mgr" compatible, while ARM64 is using
"altr,sys-mgr-s10" compatible.  

Removed "cpu1-start-addr" for ARM64 as it is not required.

> > +
> > +  reg:
> > +    maxItems: 1
> > +
> > +  cpu1-start-addr:
> > +    $ref: /schemas/types.yaml#/definitions/uint32
> > +    description: CPU1 start address in hex
> > +
> > +required:
> > +  - compatible
> > +  - reg
> > +
> > +if:
> 
> Please keep it here under "allOf:". Will save you one re-indentation on any new
> variant.

Sure I will update in v2 patch. 

> 
> > +  properties:
> > +    compatible:
> > +      contains:
> > +        const: altr,sys-mgr-s10
> > +then:
> > +  properties:
> > +    cpu1-start-addr: false
> > +
> > +additionalProperties: false
> > +
> > +examples:
> > +  - |
> > +    sysmgr@...08000 {
> > +      compatible = "altr,sys-mgr";
> > +      reg = <0xffd08000 0x1000>;
> > +      cpu1-start-addr = <0xffd080c4>;
> > +    };
> Best regards,
> Krzysztof

Thanks,
Nirav