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Message-ID: <0dae7231-6bd1-b7fc-4a5e-b0787b0adaba@quicinc.com>
Date: Tue, 20 Feb 2024 17:36:39 +0530
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Subject: Re: [PATCH 1/5] spi: dt-bindings: add binding doc for spi-qpic-snand
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To: Conor Dooley <conor@kernel.org>
CC: <andersson@kernel.org>, <konrad.dybcio@linaro.org>, <broonie@kernel.org>,
        <robh@kernel.org>, <krzysztof.kozlowski+dt@linaro.org>,
        <conor+dt@kernel.org>, <miquel.raynal@bootlin.com>, <richard@nod.at>,
        <vigneshr@ti.com>, <manivannan.sadhasivam@linaro.org>,
        <linux-arm-msm@vger.kernel.org>, <linux-spi@vger.kernel.org>,
        <devicetree@vger.kernel.org>, <linux-kernel@vger.kernel.org>,
        <linux-mtd@lists.infradead.org>, <quic_srichara@quicinc.com>,
        <quic_varada@quicinc.com>
References: <20240215134856.1313239-1-quic_mdalam@quicinc.com>
 <20240215134856.1313239-2-quic_mdalam@quicinc.com>
 <20240215-upon-anime-af032e49e84d@spud>
From: Md Sadre Alam <quic_mdalam@quicinc.com>
In-Reply-To: <20240215-upon-anime-af032e49e84d@spud>
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On 2/15/2024 7:54 PM, Conor Dooley wrote:
> On Thu, Feb 15, 2024 at 07:18:52PM +0530, Md Sadre Alam wrote:
>> Add device-tree binding documentation for QCOM QPIC-SNAND-NAND Flash
>> Interface.
>>
>> Co-developed-by: Sricharan Ramabadhran <quic_srichara@quicinc.com>
>> Signed-off-by: Sricharan Ramabadhran <quic_srichara@quicinc.com>
>> Co-developed-by: Varadarajan Narayanan <quic_varada@quicinc.com>
>> Signed-off-by: Varadarajan Narayanan <quic_varada@quicinc.com>
>> Signed-off-by: Md Sadre Alam <quic_mdalam@quicinc.com>
>> ---
>>   .../bindings/spi/qcom,spi-qpic-snand.yaml     | 82 +++++++++++++++++++
>>   1 file changed, 82 insertions(+)
>>   create mode 100644 Documentation/devicetree/bindings/spi/qcom,spi-qpic-snand.yaml
>>
>> diff --git a/Documentation/devicetree/bindings/spi/qcom,spi-qpic-snand.yaml b/Documentation/devicetree/bindings/spi/qcom,spi-qpic-snand.yaml
>> new file mode 100644
>> index 000000000000..fa7484ce1319
>> --- /dev/null
>> +++ b/Documentation/devicetree/bindings/spi/qcom,spi-qpic-snand.yaml
>> @@ -0,0 +1,82 @@
>> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
>> +%YAML 1.2
>> +---
>> +$id: http://devicetree.org/schemas/spi/qcom,spi-qpic-snand.yaml#
>> +$schema: http://devicetree.org/meta-schemas/core.yaml#
>> +
>> +title: Qualcomm QPIC NAND controller
>> +
>> +maintainers:
>> +  - Md sadre Alam <quic_mdalam@quicinc.com>
>> +
>> +properties:
>> +  compatible:
>> +    enum:
>> +      - qcom,ipq9574-snand
>> +
>> +  reg:
>> +    maxItems: 1
>> +
>> +  clocks:
>> +    minItems: 2
>> +    maxItems: 3
>> +
>> +  clock-names:
>> +    minItems: 2
>> +    maxItems: 3
>> +
>> +allOf:
>> +  - $ref: /schemas/spi/spi-controller.yaml#
>> +  - if:
> 
>> +      properties:
>> +        compatible:
>> +          contains:
>> +            enum:
>> +              - qcom,ipq9574-snand
>> +
>> +    then:
>> +      properties:
>> +        dmas:
>> +          items:
>> +            - description: tx DMA channel
>> +            - description: rx DMA channel
>> +            - description: cmd DMA channel
>> +
>> +        dma-names:
>> +          items:
>> +            - const: tx
>> +            - const: rx
>> +            - const: cmd
> 
> None of this complexity here is needed, you have only one device in this
> binding and therefore can define these properties at the top level.

  Thanks for reviewing, Will fix this in next patch.
> 
> Cheers,
> Conor.
> 
>> +required:
>> +  - compatible
>> +  - reg
>> +  - clocks
>> +  - clock-names
>> +
>> +unevaluatedProperties: false
>> +
>> +examples:
>> +  - |
>> +    #include <dt-bindings/clock/qcom,ipq9574-gcc.h>
>> +    qpic_nand: spi@79b0000 {
>> +        compatible = "qcom,ipq9574-snand";
>> +        reg = <0x1ac00000 0x800>;
>> +
>> +        clocks = <&gcc GCC_QPIC_CLK>,
>> +                 <&gcc GCC_QPIC_AHB_CLK>,
>> +                 <&gcc GCC_QPIC_IO_MACRO_CLK>;
>> +        clock-names = "core", "aon", "iom";
>> +
>> +        #address-cells = <1>;
>> +        #size-cells = <0>;
>> +
>> +        flash@0 {
>> +            compatible = "spi-nand";
>> +            reg = <0>;
>> +            #address-cells = <1>;
>> +            #size-cells = <1>;
>> +            nand-ecc-engine = <&qpic_nand>;
>> +            nand-ecc-strength = <4>;
>> +            nand-ecc-step-size = <512>;
>> +            };
>> +        };
>> -- 
>> 2.34.1
>>