linux-kernel - Re: [PATCH 2/5] dt-bindings: arm: ti: Add bindings for AM625 SoC

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Date:   Thu, 10 Feb 2022 00:34:22 +0530
From:   Vignesh Raghavendra <vigneshr@...com>
To:     Krzysztof Kozlowski <krzysztof.kozlowski@...onical.com>,
        Nishanth Menon <nm@...com>, Tero Kristo <kristo@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        Santosh Shilimkar <ssantosh@...nel.org>
CC:     <linux-arm-kernel@...ts.infradead.org>,
        <devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 2/5] dt-bindings: arm: ti: Add bindings for AM625 SoC



On 08/02/22 10:31 pm, Krzysztof Kozlowski wrote:
> On 08/02/2022 14:18, Vignesh Raghavendra wrote:
>> From: Nishanth Menon <nm@...com>
>>
>> The AM62 SoC family is the follow on AM335x built on K3 Multicore SoC
>> architecture platform, providing ultra-low-power modes, dual display,
>> multi-sensor edge compute, security and other BOM-saving integration.
>> The AM62 SoC targets broad market to enable applications such as
>> Industrial HMI, PLC/CNC/Robot control, Medical Equipment, Building
>> Automation, Appliances and more.
>>
>> Some highlights of this SoC are:
>>
>> * Quad-Cortex-A53s (running up to 1.4GHz) in a single cluster.
>>   Pin-to-pin compatible options for single and quad core are available.
>> * Cortex-M4F for general-purpose or safety usage.
>> * Dual display support, providing 24-bit RBG parallel interface and
>>   OLDI/LVDS-4 Lane x2, up to 200MHz pixel clock support for 2K display
>>   resolution.
>> * Selectable GPUsupport, up to 8GFLOPS, providing better user experience
>>   in 3D graphic display case and Android.
>> * PRU(Programmable Realtime Unit) support for customized programmable
>>   interfaces/IOs.
>> * Integrated Giga-bit Ethernet switch supporting up to a total of two
>>   external ports (TSN capable).
>> * 9xUARTs, 5xSPI, 6xI2C, 2xUSB2, 3xCAN-FD, 3x eMMC and SD, GPMC for
>>   NAND/FPGA connection, OSPI memory controller, 3xMcASP for audio,
>>   1x CSI-RX-4L for Camera, eCAP/eQEP, ePWM, among other peripherals.
>> * Dedicated Centralized System Controller for Security, Power, and
>>   Resource Management.
>> * Multiple low power modes support, ex: Deep sleep,Standby, MCU-only,
>>   enabling battery powered system design.
>>
>> AM625 is the first device of the family. Add DT bindings for the same.
> 
> Don't paste the same huge commit description in several commits.

Sorry, I think this is the first commit with full description. I will
probably trim 4/5 at bit

> 
>>
>> More details can be found in the Technical Reference Manual:
>> https://www.ti.com/lit/pdf/spruiv7
>>
>> Signed-off-by: Nishanth Menon <nm@...com>
>> Signed-off-by: Vignesh Raghavendra <vigneshr@...com>
>> ---
>>  Documentation/devicetree/bindings/arm/ti/k3.yaml | 6 ++++++
>>  1 file changed, 6 insertions(+)
>>
>> diff --git a/Documentation/devicetree/bindings/arm/ti/k3.yaml b/Documentation/devicetree/bindings/arm/ti/k3.yaml
>> index b03c10fa2e7a..64f3db3ea9dd 100644
>> --- a/Documentation/devicetree/bindings/arm/ti/k3.yaml
>> +++ b/Documentation/devicetree/bindings/arm/ti/k3.yaml
>> @@ -53,6 +53,12 @@ properties:
>>                - ti,am642-sk
>>            - const: ti,am642
>>  
>> +      - description: K3 AM625 SoC
>> +        items:
>> +          - enum:
>> +              - ti,am625-sk
>> +          - const: ti,am625
> 
> Why keeping it not alphabetically sorted? What sorting did you choose?
> 

Above list is not sorted alphabetically, I tried to keep similar SoCs
bunched together. AM625 and AM642 are of same family, hence chose to add
the new entry here.

One alternative is to add it to end of the list (chronologically)?
Or I can add a patch to sort the list alphabetically first and then
introduce new compatible. Please let me know your preference?

>> +
>>        - description: K3 J721s2 SoC
>>          items:
>>            - enum:
> 
> 
> Best regards,
> Krzysztof


Regards
Vignesh