Re: [PATCH 1/5] dt-bindings: i2c: Add Qualcomm Geni based QUP i2c bindings

[Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>]

On 02/04/2022 07:12, Kuldeep Singh wrote:
> GENI(generic interface) based Qualcomm Universal Peripheral controller
> can support multiple serial interfaces like spi,uart and i2c.
> 
> Unlike other i2c controllers, QUP i2c bindings are present in parent
> schema. Move it out from parent to an individual binding and let parent
> refer to child schema later on.
> 
> Please note, current schema isn't complete as it misses out few
> properties and thus, add these missing properties along the process.
> 
> Signed-off-by: Kuldeep Singh <singh.kuldeep87k@gmail.com>
> ---
>  .../bindings/i2c/qcom,i2c-geni-qcom.yaml      | 110 ++++++++++++++++++
>  1 file changed, 110 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/i2c/qcom,i2c-geni-qcom.yaml
> 
> diff --git a/Documentation/devicetree/bindings/i2c/qcom,i2c-geni-qcom.yaml b/Documentation/devicetree/bindings/i2c/qcom,i2c-geni-qcom.yaml
> new file mode 100644
> index 000000000000..01a02e680ea3
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/i2c/qcom,i2c-geni-qcom.yaml
> @@ -0,0 +1,110 @@
> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: "http://devicetree.org/schemas/i2c/qcom,i2c-geni-qcom.yaml#"
> +$schema: "http://devicetree.org/meta-schemas/core.yaml#"
> +
> +title: Qualcomm Geni based QUP I2C Controller
> +
> +maintainers:
> +  - Andy Gross <agross@kernel.org>
> +  - Bjorn Andersson <bjorn.andersson@linaro.org>
> +
> +allOf:
> +  - $ref: /schemas/i2c/i2c-controller.yaml#
> +
> +properties:
> +  compatible:
> +    enum:
> +      - qcom,geni-i2c

Just const, no enum. There are no other flavors of this (unless you
think there are?).

> +
> +  clocks:
> +    maxItems: 1
> +
> +  clock-names:
> +    const: se
> +
> +  clock-frequency:
> +    description: Desired I2C bus clock frequency in Hz
> +    default: 100000
> +
> +  interconnects:
> +    maxItems: 3
> +
> +  interconnect-names:
> +    items:
> +      - const: qup-core
> +      - const: qup-config
> +      - const: qup-memory
> +
> +  interrupts:
> +    maxItems: 1
> +
> +  power-domains:
> +    maxItems: 1
> +
> +  reg:
> +    maxItems: 1
> +
> +  required-opps:
> +    maxItems: 1

I have doubts this is correct property. Usually it is part of the
opp-table. I see sc7180 needs this, but I think it is a mistake. Do you
know how it is supposed to work?


Best regards,
Krzysztof