Date: Tue, 16 Jan 2024 16:36:13 +0100
From: Michal Simek <michal.simek@....com>
To: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>,
 Dragan Cvetic <dragan.cvetic@....com>, arnd@...db.de,
 gregkh@...uxfoundation.org, michal.simek@...inx.com,
 linux-arm-kernel@...ts.infradead.org, robh+dt@...nel.org,
 mark.rutland@....com, devicetree@...r.kernel.org
Cc: linux-kernel@...r.kernel.org, git@....com
Subject: Re: [PATCH 1/2] dt-bindings: misc: xlnx,sd-fec: convert bindings to
 yaml



On 1/16/24 16:20, Krzysztof Kozlowski wrote:
> On 16/01/2024 12:11, Dragan Cvetic wrote:
>> Convert AMD (Xilinx) sd-fec bindings to yaml format, so it can validate
>> dt-entries as well as any future additions to yaml.
>> Conversion txt to yamal is done "one to one", no new changes in txt file
>> has been made.
>>
>> Reviewed-by: Michal Simek <michal.simek@....com>
> 
> Where? Please provide a link. Judging by amount of issues here, I have
> some doubts, because I know Michal writes good schema. :)

I reviewed it internally. But yes, I didn't provide this line.
And never said that 2/2 should be separate patch too. :-)

> 
>> Signed-off-by: Dragan Cvetic <dragan.cvetic@....com>
> 
> All your patches were marked as spam. Please work with your IT to
> resolve it, otherwise your future submissions might get ignored by me,
> because I will just not see them.
> 
>> ---
>>   .../devicetree/bindings/misc/xlnx,sd-fec.txt  |  58 --------
>>   .../devicetree/bindings/misc/xlnx,sd-fec.yaml | 132 ++++++++++++++++++
>>   2 files changed, 132 insertions(+), 58 deletions(-)
>>   delete mode 100644 Documentation/devicetree/bindings/misc/xlnx,sd-fec.txt
>>   create mode 100644 Documentation/devicetree/bindings/misc/xlnx,sd-fec.yaml
>>
> 
> Please use scripts/get_maintainers.pl to get a list of necessary people
> and lists to CC (and consider --no-git-fallback argument). It might
> happen, that command when run on an older kernel, gives you outdated
> entries. Therefore please be sure you base your patches on recent Linux
> kernel.
> 
> Looks like you either based it on some downstream tree (don't do this)
> or used random list of recipients (also don't do this).
> 
> Please reach to other AMD folks to explain you how patches should be
> submitted. There are a lot of experienced guys there, so use them.
> 
>> diff --git a/Documentation/devicetree/bindings/misc/xlnx,sd-fec.txt b/Documentation/devicetree/bindings/misc/xlnx,sd-fec.txt
>> deleted file mode 100644
>> index e3289634fa30..000000000000
>> --- a/Documentation/devicetree/bindings/misc/xlnx,sd-fec.txt
>> +++ /dev/null
>> @@ -1,58 +0,0 @@
>> -* Xilinx SDFEC(16nm) IP *
>> -
> 
> ...
> 
>> -	};
>> diff --git a/Documentation/devicetree/bindings/misc/xlnx,sd-fec.yaml b/Documentation/devicetree/bindings/misc/xlnx,sd-fec.yaml
>> new file mode 100644
>> index 000000000000..05bc01cb5075
>> --- /dev/null
>> +++ b/Documentation/devicetree/bindings/misc/xlnx,sd-fec.yaml
>> @@ -0,0 +1,132 @@
>> +# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
>> +%YAML 1.2
>> +---
>> +$id: http://devicetree.org/schemas/misc/xlnx,sd-fec.yaml#
>> +$schema: http://devicetree.org/meta-schemas/core.yaml#
>> +
>> +title: Xilinx SDFEC(16nm) IP
>> +
>> +maintainers:
>> +  - Cvetic, Dragan <dragan.cvetic@....com>
>> +  - Erim, Salih <salih.erim@....com>
>> +
>> +description: |
>> +  The Soft Decision Forward Error Correction (SDFEC) Engine is a Hard IP block
>> +  which provides high-throughput LDPC and Turbo Code implementations.
>> +  The LDPC decode & encode functionality is capable of covering a range of
>> +  customer specified Quasi-cyclic (QC) codes. The Turbo decode functionality
>> +  principally covers codes used by LTE. The FEC Engine offers significant
>> +  power and area savings versus implementations done in the FPGA fabric.
>> +
>> +properties:
>> +  compatible:
>> +    const: xlnx,sd-fec-1.1
>> +
>> +  reg:
>> +    maxItems: 1
>> +
>> +  clocks:
>> +    description: List of clock specifiers.
> 
> Drop description, it's obvious. Do you see it anywhere in existing code?
> 
>> +    additionalItems: true
> 
> Drop, you cannot have it.
> 
>> +    minItems: 2
>> +    maxItems: 8
> 
> Drop maxItems, not needed.
> 
>> +    items:
>> +      - description: Main processing clock for processing core.
> 
> Drop trailing full-stops.
> 
>> +      - description: AXI4-Lite memory-mapped slave interface clock.
>> +      - description: Control input AXI4-Stream Slave interface clock.
>> +      - description: DIN AXI4-Stream Slave interface clock.
>> +      - description: Status output AXI4-Stream Master interface clock.
>> +      - description: DOUT AXI4-Stream Master interface clock.
>> +      - description: DIN_WORDS AXI4-Stream Slave interface clock
>> +      - description: DOUT_WORDS AXI4-Stream Master interface clock
>> +
>> +  clock-names:
>> +    additionalItems: true
> 
> Nope
> 
>> +    minItems: 2
>> +    maxItems: 8
> 
> Nope
> 
>> +    items:
>> +      - const: core_clk
>> +      - const: s_axi_aclk
>> +      - enum:
>> +          - s_axis_ctrl_aclk
>> +          - s_axis_din_aclk
>> +          - m_axis_status_aclk
>> +          - m_axis_dout_aclk
>> +          - s_axis_din_words_aclk
>> +          - m_axis_dout_words_aclk
> 
> Why order is not enforced?

Let me comment this one. Based on my discussion with Dragan IP itself is 
configurable and only the first two clocks are in all combinations. But based on 
his description that last 6 clocks can be present in some of them.
It means order is not really fixed and any combination is possible.
That's why I have suggested him to use this description because I didn't find 
any better one.
I actually tested this schema here but didn't get a feedback on it yet.
https://lore.kernel.org/r/3e86244a840a45c970289ba6d2fa700a74f5b259.1705051222.git.michal.simek@amd.com

It means not sure about not defining maxItems but when I don't do it it is not 
passing dtbs_check.

Thanks,
Michal

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