linux-kernel - Re: [PATCH v3 2/3] ARM: dts: microchip: sama7g5: Add flexcom 10 node

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Date: Fri, 16 Feb 2024 10:24:13 +0200
From: claudiu beznea <claudiu.beznea@...on.dev>
To: Alexandre Belloni <alexandre.belloni@...tlin.com>,
 Mihai.Sain@...rochip.com
Cc: conor@...nel.org, robh+dt@...nel.org, krzysztof.kozlowski+dt@...aro.org,
 conor+dt@...nel.org, Nicolas.Ferre@...rochip.com, andre.przywara@....com,
 devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
 linux-kernel@...r.kernel.org, Cristian.Birsan@...rochip.com
Subject: Re: [PATCH v3 2/3] ARM: dts: microchip: sama7g5: Add flexcom 10 node



On 16.02.2024 09:56, Alexandre Belloni wrote:
> On 16/02/2024 06:58:10+0000, Mihai.Sain@...rochip.com wrote:
>>> diff --git a/arch/arm/boot/dts/microchip/sama7g5.dtsi b/arch/arm/boot/dts/microchip/sama7g5.dtsi
>>> index 269e0a3ca269..c030b318985a 100644
>>> --- a/arch/arm/boot/dts/microchip/sama7g5.dtsi
>>> +++ b/arch/arm/boot/dts/microchip/sama7g5.dtsi
>>> @@ -958,6 +958,30 @@ i2c9: i2c@600 {
>>>  			};
>>>  		};
>>>  
>>> +		flx10: flexcom@...20000 {
>>> +			compatible = "atmel,sama5d2-flexcom";
>>
>> My comment here was ignored:
>> https://lore.kernel.org/all/20240214-robe-pregnancy-a1b056c9fe14@spud/
>>
>> The SAMA7G5 has the same flexcom controller as SAMA5D2 MPU.
>>
> 
> Still, it needs its own compatible plus a fallback to
> atmel,sama5d2-flexcom

I agree with this. Though, flexcom documentation is subject to YAML
conversion (a patch has been re-posted these days [1] and *maybe* it will
be integrated this time). And there are multiple SoC DTs that need to be
updated with their own flexcom compatible (lan966x, sam9x60, sama7g5).

To avoid conflicting with the work at [1] and postponing this series we may
do the update after the [1] is done.

Let me know your thoughts. Either way is fine by me.

Thank you,
Claudiu Beznea

[1]
https://patchwork.kernel.org/project/linux-arm-kernel/patch/20240214-sama5d2-flexcom-yaml-v1-1-5dedd0eba08e@microchip.com/

> 
>> https://github.com/torvalds/linux/blob/master/drivers/mfd/atmel-flexcom.c#L83
>> https://github.com/torvalds/linux/blob/master/Documentation/devicetree/bindings/mfd/atmel-flexcom.txt#L8
>