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

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Date:   Tue, 8 Aug 2023 16:27:20 +0530
From:   Md Danish Anwar <a0501179@...com>
To:     Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>,
        Conor Dooley <conor@...nel.org>,
        MD Danish Anwar <danishanwar@...com>
CC:     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 08/08/23 3:48 pm, Krzysztof Kozlowski wrote:
> On 08/08/2023 11:44, Md Danish Anwar wrote:
>>>>    properties:
>>>>      compatible:
>>>> @@ -171,6 +181,9 @@ examples:
>>>>                <0x22400 0x100>;
>>>>          reg-names = "iram", "control", "debug";
>>>>          firmware-name = "am65x-pru0_0-fw";
>>>> +        interrupt-parent = <&icssg0_intc>;
>>>> +        interrupts = <16 2 2>;
>>>> +        interrupt-names = "vring";
>>>>        };
>>>
>>> These examples would probably be more helpful if they used the
>>> appropriate defines, no?
>>>
>>
>> PRUSS Interrupt controller doesn't have any appropriate defines. This doesn't
>> use GIC so defines from arm-gic.h can not be used here. These are specific to
>> PRUSS INTC.
>>
>> I think these example are OK. Please let me know if this is OK to you.
> 
> But isn't "2" type of the interrupt?
> 
> Best regards,
> Krzysztof
> 

As per the description of interrupts property in ti,pruss-intc.yaml [1]

Cell 1 is PRU System event number, cell 2 is PRU channel and cell 3 is PRU
host_event (target). None of them is type of interrupt. So that's why they all
are hardcoded. I don't think we can use IRQ_TYPE macros here.

[1]
https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/tree/Documentation/devicetree/bindings/interrupt-controller/ti,pruss-intc.yaml#:~:text=const%3A%203-,description%3A%20%7C,-Client%20users%20shall

-- 
Thanks and Regards,
Danish.