[PATCH] dt-bindings: iio: gyroscope: bosch,bmg160: correct number of pins

[PATCH] dt-bindings: iio: gyroscope: bosch,bmg160: correct number of pins

[Krzysztof Kozlowski]

BMG160 has two interrupt pins to which interrupts can be freely mapped.
Correct the schema to express such case and fix warnings like:

  qcom/msm8916-alcatel-idol347.dtb: gyroscope@68: interrupts: [[97, 1], [98, 1]] is too long

Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
---
 .../devicetree/bindings/iio/gyroscope/bosch,bmg160.yaml        | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/Documentation/devicetree/bindings/iio/gyroscope/bosch,bmg160.yaml b/Documentation/devicetree/bindings/iio/gyroscope/bosch,bmg160.yaml
index b6bbc312a7cf..ebf98bc2eb7f 100644
--- a/Documentation/devicetree/bindings/iio/gyroscope/bosch,bmg160.yaml
+++ b/Documentation/devicetree/bindings/iio/gyroscope/bosch,bmg160.yaml
@@ -24,6 +24,9 @@ properties:
 
   interrupts:
     minItems: 1
+    items:
+      - description: INT1 pin
+      - description: INT2 pin
     description:
       Should be configured with type IRQ_TYPE_EDGE_RISING.
 
-- 
2.34.1

Re: [PATCH] dt-bindings: iio: gyroscope: bosch,bmg160: correct number of pins

[Rob Herring]

On Wed, 27 Jul 2022 16:01:48 +0200, Krzysztof Kozlowski wrote:
> BMG160 has two interrupt pins to which interrupts can be freely mapped.
> Correct the schema to express such case and fix warnings like:
> 
>   qcom/msm8916-alcatel-idol347.dtb: gyroscope@68: interrupts: [[97, 1], [98, 1]] is too long
> 
> Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
> ---
>  .../devicetree/bindings/iio/gyroscope/bosch,bmg160.yaml        | 3 +++
>  1 file changed, 3 insertions(+)
> 

Acked-by: Rob Herring <robh@kernel.org>

Re: [PATCH] dt-bindings: iio: gyroscope: bosch,bmg160: correct number of pins

[Jonathan Cameron]

On Wed, 27 Jul 2022 16:01:48 +0200
Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org> wrote:

> BMG160 has two interrupt pins to which interrupts can be freely mapped.
> Correct the schema to express such case and fix warnings like:
> 
>   qcom/msm8916-alcatel-idol347.dtb: gyroscope@68: interrupts: [[97, 1], [98, 1]] is too long
> 
> Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>

We may need more than this.  What if only INT2 is wired?  I'd expect such
a device's binding to include interrupt-names to cover that case.
We'd also need a bunch of driver code to route the resulting interrupts.

I think the snag is that adding such support will break existing bindings using the
below.

> ---
>  .../devicetree/bindings/iio/gyroscope/bosch,bmg160.yaml        | 3 +++
>  1 file changed, 3 insertions(+)
> 
> diff --git a/Documentation/devicetree/bindings/iio/gyroscope/bosch,bmg160.yaml b/Documentation/devicetree/bindings/iio/gyroscope/bosch,bmg160.yaml
> index b6bbc312a7cf..ebf98bc2eb7f 100644
> --- a/Documentation/devicetree/bindings/iio/gyroscope/bosch,bmg160.yaml
> +++ b/Documentation/devicetree/bindings/iio/gyroscope/bosch,bmg160.yaml
> @@ -24,6 +24,9 @@ properties:
>  
>    interrupts:
>      minItems: 1
> +    items:
> +      - description: INT1 pin
> +      - description: INT2 pin
>      description:
>        Should be configured with type IRQ_TYPE_EDGE_RISING.
>  

Re: [PATCH] dt-bindings: iio: gyroscope: bosch,bmg160: correct number of pins

[Krzysztof Kozlowski]

On 31/07/2022 14:30, Jonathan Cameron wrote:
> On Wed, 27 Jul 2022 16:01:48 +0200
> Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org> wrote:
> 
>> BMG160 has two interrupt pins to which interrupts can be freely mapped.
>> Correct the schema to express such case and fix warnings like:
>>
>>   qcom/msm8916-alcatel-idol347.dtb: gyroscope@68: interrupts: [[97, 1], [98, 1]] is too long
>>
>> Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
> 
> We may need more than this.  What if only INT2 is wired?  

Right, thanks for pointing it out.

> I'd expect such
> a device's binding to include interrupt-names to cover that case.
> We'd also need a bunch of driver code to route the resulting interrupts.

Yes, which is a bit out of scope of fixing schema/DTS. The driver
supports only one interrupt and bindings are unspecific, so I think the
author just did not care about making it correct.

> 
> I think the snag is that adding such support will break existing bindings using the
> below.

I can prepare more relaxed version of the patch.

Best regards,
Krzysztof