linux-kernel - Re: [PATCH v1 1/2] dt-bindings: serial: samsung: Add samsung,exynos8895-uart compatible

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Message-ID: <d20c05a7-5411-4a2a-950a-8a48b0c2e127@gmail.com>
Date: Mon, 21 Oct 2024 15:51:33 +0300
From: Ivaylo Ivanov <ivo.ivanov.ivanov1@...il.com>
To: Krzysztof Kozlowski <krzk@...nel.org>,
 Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
 Jiri Slaby <jirislaby@...nel.org>, Alim Akhtar <alim.akhtar@...sung.com>,
 Rob Herring <robh@...nel.org>, Conor Dooley <conor+dt@...nel.org>
Cc: linux-samsung-soc@...r.kernel.org, linux-serial@...r.kernel.org,
 devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
 linux-kernel@...r.kernel.org
Subject: Re: [PATCH v1 1/2] dt-bindings: serial: samsung: Add
 samsung,exynos8895-uart compatible


On 10/21/24 12:29, Krzysztof Kozlowski wrote:
> On 20/10/2024 20:02, Ivaylo Ivanov wrote:
>> Add dedicated samsung,exynos8895-uart compatible to the dt-schema for
>> representing uart of the Exynos8895 SoC.
>>
>> Like GS101, it has a required DT property samsung,uart-fifosize, but
>> it does not exhibit the 32 bit register access limit.
>>
>> Signed-off-by: Ivaylo Ivanov <ivo.ivanov.ivanov1@...il.com>
>> ---
>>  .../bindings/serial/samsung_uart.yaml           | 17 +++++++++++++++++
>>  1 file changed, 17 insertions(+)
>>
>> diff --git a/Documentation/devicetree/bindings/serial/samsung_uart.yaml b/Documentation/devicetree/bindings/serial/samsung_uart.yaml
>> index 788c80e47..2491b6048 100644
>> --- a/Documentation/devicetree/bindings/serial/samsung_uart.yaml
>> +++ b/Documentation/devicetree/bindings/serial/samsung_uart.yaml
>> @@ -27,6 +27,7 @@ properties:
>>            - samsung,exynos4210-uart
>>            - samsung,exynos5433-uart
>>            - samsung,exynos850-uart
>> +          - samsung,exynos8895-uart
>>        - items:
>>            - enum:
>>                - samsung,exynos7-uart
>> @@ -172,6 +173,22 @@ allOf:
>>          clock-names:
>>            maxItems: 2
>>  
>> +  - if:
>> +      properties:
>> +        compatible:
>> +          contains:
>> +            enum:
>> +              - samsung,exynos8895-uart
> This looks exactly like gs101, so please grow the enum there.

It's missing the reg-io-width property. My initial idea was to add a

completely new entry, so new exynos platforms that don't exhibit

the same issue could grow the enum there.

Although now that I think about it, I could grow the gs101 enum and set

the  reg-io-width property for gs101 after that list.

Best regards, Ivo.

> Best regards,
> Krzysztof
>