linux-kernel - Re: [PATCH] dt-bindings: remoteproc: pru: Add Interrupt property

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Date:   Mon, 14 Aug 2023 10:43:58 +0530
From:   Md Danish Anwar <a0501179@...com>
To:     Conor Dooley <conor@...nel.org>
CC:     MD Danish Anwar <danishanwar@...com>, Suman Anna <s-anna@...com>,
        Conor Dooley <conor+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Rob Herring <robh+dt@...nel.org>,
        Mathieu Poirier <mathieu.poirier@...aro.org>,
        Bjorn Andersson <andersson@...nel.org>,
        <linux-kernel@...r.kernel.org>, <devicetree@...r.kernel.org>,
        <linux-remoteproc@...r.kernel.org>, <linux-omap@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>, <vigneshr@...com>,
        <srk@...com>, <nm@...com>
Subject: Re: [PATCH] dt-bindings: remoteproc: pru: Add Interrupt property

On 11/08/23 8:51 pm, Conor Dooley wrote:
> On Fri, Aug 11, 2023 at 04:48:28PM +0530, Md Danish Anwar wrote:
> 
>>>> There are no standard defines for these interrupt types. However I can create a
>>>> new .h file defining all the three interrupt cells and their values for both
>>>> PRU and RTU cores if you think that is required. Otherwise we can go with
>>>> hardcoded values.
>>>>
>>>> Please let me know what you think should be done here.
>>>
>>> It'd be good to reference to the documentation for the cells, I don't
>>> think adding a header is necessary here.
>>>
>>
>> How should I reference to the documentation for the cells?
>>
>> Should I just add the details of cells in description of interrupt property here.
>>
>>   interrupts:
>>     maxItems: 1
>>     description:
>>       Interrupt specifiers enable the virtio/rpmsg communication between MPU
>>       and the PRU/RTU cores. The value of the interrupts should be the PRU
>>       System event number [cell 1], PRU channel [cell 2] and PRU host_event
>>       (target) [cell 3].
>>
>> Please let me know if this looks OK to you.
> 
> I was thinking there'd be an binding for the interrupt controller that
> you could mentioned.

There is a binding for interrupt-controller [1] that I can mention. I tried using

- $ref: /schemas/interrupt-controller/ti,pruss-intc.yaml#

But it was throwing dt binding errors so I didn't add the ref.

I will mention this file name in the description of the property like below,

     description:
       Interrupt specifiers enable the virtio/rpmsg communication between MPU
       and the PRU/RTU cores. For the values of the interrupt cells please
       refer to interrupt-controller/ti,pruss-intc.yaml schema.

Please let me know if this looks OK to you.

[1]
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/Documentation/devicetree/bindings/interrupt-controller/ti,pruss-intc.yaml

-- 
Thanks and Regards,
Danish.