linux-kernel - Re: [PATCH v2 14/15] dt-bindings: mtd: sunxi: Add H616 compatible

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Message-ID: <72d9b0f3-da27-4e30-b07b-d85be23b1407@bootlin.com>
Date: Tue, 14 Oct 2025 09:13:43 +0200
From: Richard GENOUD <richard.genoud@...tlin.com>
To: Conor Dooley <conor@...nel.org>
Cc: Miquel Raynal <miquel.raynal@...tlin.com>,
 Richard Weinberger <richard@....at>, Vignesh Raghavendra <vigneshr@...com>,
 Rob Herring <robh@...nel.org>, Krzysztof Kozlowski <krzk+dt@...nel.org>,
 Conor Dooley <conor+dt@...nel.org>, Chen-Yu Tsai <wens@...e.org>,
 Jernej Skrabec <jernej.skrabec@...il.com>,
 Samuel Holland <samuel@...lland.org>,
 Uwe Kleine-König <u.kleine-koenig@...libre.com>,
 Wentao Liang <vulab@...as.ac.cn>, Johan Hovold <johan@...nel.org>,
 Maxime Ripard <mripard@...nel.org>,
 Thomas Petazzoni <thomas.petazzoni@...tlin.com>,
 linux-mtd@...ts.infradead.org, devicetree@...r.kernel.org,
 linux-arm-kernel@...ts.infradead.org, linux-sunxi@...ts.linux.dev,
 linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 14/15] dt-bindings: mtd: sunxi: Add H616 compatible

Le 13/10/2025 à 21:44, Conor Dooley a écrit :
> On Mon, Oct 13, 2025 at 05:26:44PM +0200, Richard Genoud wrote:
>> The H616 NAND controller is quite different from the A10 and A23 ones,
>> some registers offset changed, and some new one are introduced.
>> Also, the DMA handling is different (it uses chained descriptors)
>>
>> So, introduce a new compatible to represent this version of the IP.
>>
>> Signed-off-by: Richard Genoud <richard.genoud@...tlin.com>
>> ---
>>   .../mtd/allwinner,sun4i-a10-nand.yaml         | 57 ++++++++++++++++---
>>   1 file changed, 48 insertions(+), 9 deletions(-)
>>
>> diff --git a/Documentation/devicetree/bindings/mtd/allwinner,sun4i-a10-nand.yaml b/Documentation/devicetree/bindings/mtd/allwinner,sun4i-a10-nand.yaml
>> index 054b6b8bf9b9..4b82de9fae17 100644
>> --- a/Documentation/devicetree/bindings/mtd/allwinner,sun4i-a10-nand.yaml
>> +++ b/Documentation/devicetree/bindings/mtd/allwinner,sun4i-a10-nand.yaml
>> @@ -6,9 +6,6 @@ $schema: http://devicetree.org/meta-schemas/core.yaml#
>>   
>>   title: Allwinner A10 NAND Controller
>>   
>> -allOf:
>> -  - $ref: nand-controller.yaml
>> -
>>   maintainers:
>>     - Chen-Yu Tsai <wens@...e.org>
>>     - Maxime Ripard <mripard@...nel.org>
>> @@ -18,6 +15,8 @@ properties:
>>       enum:
>>         - allwinner,sun4i-a10-nand
>>         - allwinner,sun8i-a23-nand-controller
>> +      - allwinner,sun50i-h616-nand-controller
>> +
>>     reg:
>>       maxItems: 1
>>   
>> @@ -25,14 +24,12 @@ properties:
>>       maxItems: 1
>>   
>>     clocks:
>> -    items:
>> -      - description: Bus Clock
>> -      - description: Module Clock
>> +    minItems: 2
>> +    maxItems: 4
>>   
>>     clock-names:
>> -    items:
>> -      - const: ahb
>> -      - const: mod
>> +    minItems: 2
>> +    maxItems: 4
> 
> The clock descriptions and names should remain out here, with your new
> min/max constraints, since they're identical at indices 0 and 1 to for
> both types of device. The if/then should only set the min to 4 for the
> new device and the max to 2 for the existing ones.

Indeed.

Thanks!

> 
> Cheers,
> Conor.
> 
> pw-bot: changes-requested
> 
>>   
>>     resets:
>>       maxItems: 1
>> @@ -85,6 +82,48 @@ required:
>>   
>>   unevaluatedProperties: false
>>   
>> +allOf:
>> +  - $ref: nand-controller.yaml
>> +
>> +  - if:
>> +      properties:
>> +        compatible:
>> +          contains:
>> +            enum:
>> +              - allwinner,sun4i-a10-nand
>> +              - allwinner,sun8i-a23-nand-controller
>> +    then:
>> +      properties:
>> +        clocks:
>> +          items:
>> +            - description: Bus Clock
>> +            - description: Module Clock
>> +        clock-names:
>> +          items:
>> +            - const: ahb
>> +            - const: mod
>> +
>> +  - if:
>> +      properties:
>> +        compatible:
>> +          contains:
>> +            enum:
>> +              - allwinner,sun50i-h616-nand-controller
>> +    then:
>> +      properties:
>> +        clocks:
>> +          items:
>> +            - description: Bus Clock
>> +            - description: Module Clock
>> +            - description: ECC Clock
>> +            - description: MBus Clock
>> +        clock-names:
>> +          items:
>> +            - const: ahb
>> +            - const: mod
>> +            - const: ecc
>> +            - const: mbus
>> +
>>   examples:
>>     - |
>>       #include <dt-bindings/interrupt-controller/arm-gic.h>


-- 
Richard Genoud, Bootlin
Embedded Linux and Kernel engineering
https://bootlin.com