[PATCH 1/3] dt-bindings: i2c: add Amlogic A9 I2C controller

[Xianwei Zhao]

Hi Conor,
    Thanks for your review.

On 2026/9/25 01:01, Conor Dooley wrote:
> Subject:
> Re: [PATCH 1/3] dt-bindings: i2c: add Amlogic A9 I2C controller
> From:
> Conor Dooley <conor at kernel.org>
> Date:
> 2026/9/25 01:01
> 
> To:
> xianwei.zhao at amlogic.com
> CC:
> Junyi Zhao <junyi.zhao at amlogic.com>, Andi Shyti <andi.shyti at kernel.org>, 
> Rob Herring <robh at kernel.org>, Krzysztof Kozlowski <krzk+dt at kernel.org>, 
> Conor Dooley <conor+dt at kernel.org>, Xianwei Zhao 
> <xianwei.zhaol at amlogic.com>, Junyi Zhao <junyi.zhaol at amlogic.com>, 
> linux-i2c at vger.kernel.org, linux-amlogic at lists.infradead.org, 
> devicetree at vger.kernel.org, linux-kernel at vger.kernel.org
> 
> 
> On Thu, Sep 24, 2026 at 08:39:34AM +0000, Xianwei Zhao via B4 Relay wrote:
>> From: Xianwei Zhao<xianwei.zhao at amlogic.com>
>>
>> Add a Device Tree binding for the I2C controller found on the
>> Amlogic A9 SoC.
>>
>> Signed-off-by: Xianwei Zhao<xianwei.zhao at amlogic.com>
> Since this is not in the existing meson file, does that mean that
> there's a substantial change in the IP design, other than the addition
> of dma support?
> 

Yes. This is a new I2C controller that is different from the existing one.

>> ---
>>   .../devicetree/bindings/i2c/amlogic,a9-i2c.yaml    | 61 ++++++++++++++++++++++
>>   1 file changed, 61 insertions(+)
>>
>> diff --git a/Documentation/devicetree/bindings/i2c/amlogic,a9-i2c.yaml b/Documentation/devicetree/bindings/i2c/amlogic,a9-i2c.yaml
>> new file mode 100644
>> index 000000000000..681241a52680
>> --- /dev/null
>> +++ b/Documentation/devicetree/bindings/i2c/amlogic,a9-i2c.yaml
>> @@ -0,0 +1,61 @@
>> +# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
>> +%YAML 1.2
>> +---
>> +$id:http://devicetree.org/schemas/i2c/amlogic,a9-i2c.yaml#
>> +$schema:http://devicetree.org/meta-schemas/core.yaml#
>> +
>> +title: Amlogic A9 I2C Controller
>> +
>> +maintainers:
>> +  - Xianwei Zhao<xianwei.zhaol at amlogic.com>
>> +  - Junyi Zhao<junyi.zhaol at amlogic.com>
>> +
>> +allOf:
>> +  - $ref: /schemas/i2c/i2c-controller.yaml#
>> +
>> +properties:
>> +  compatible:
>> +    const: amlogic,a9-i2c
>> +
>> +  reg:
>> +    maxItems: 1
>> +
>> +  interrupts:
>> +    maxItems: 1
>> +
>> +  clocks:
>> +    maxItems: 1
>> +
>> +  dmas:
>> +    items:
>> +      - description: DMA controller phandle and request line for RX
>> +      - description: DMA controller phandle and request line for TX
>> +
>> +  dma-names:
>> +    items:
>> +      - const: rx
>> +      - const: tx
>> +
>> +required:
>> +  - compatible
>> +  - reg
>> +  - interrupts
>> +  - clocks
>> +
>> +unevaluatedProperties: false
>> +
>> +examples:
>> +  - |
>> +    i2c at 3a4400 {
>> +        compatible = "amlogic,a9-i2c";
>> +        reg = <0x3a4400 0x3c>;
>> +        interrupts = <1 164 1>;
>> +        clocks = <&clkc_periphs 11>;
>> +        #address-cells = <1>;
>> +        #size-cells = <0>;
>> +
>> +        eeprom at 52 {
>> +            compatible = "atmel,24c32";
>> +            reg = <0x52>;
>> +        };
> Remove this from your example please.

Will remove eeprom node from examples.

> pw-bot: changes-requested
> 
> Thanks,
> Conor.
> 
>> +    };
>>
>> -- 
>> 2.52.0
>>
>>