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

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Date:   Tue, 8 Aug 2023 15:14:31 +0530
From:   Md Danish Anwar <a0501179@...com>
To:     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

Hi Conor,

On 07/08/23 8:09 pm, Conor Dooley wrote:
> On Mon, Aug 07, 2023 at 04:38:36PM +0530, MD Danish Anwar wrote:
>> Add interrupts and interrupt-names protperties for PRU and RTU cores.
>>
>> Signed-off-by: MD Danish Anwar <danishanwar@...com>
>> ---
>>  .../bindings/remoteproc/ti,pru-rproc.yaml     | 22 +++++++++++++++++++
>>  1 file changed, 22 insertions(+)
>>
>> diff --git a/Documentation/devicetree/bindings/remoteproc/ti,pru-rproc.yaml b/Documentation/devicetree/bindings/remoteproc/ti,pru-rproc.yaml
>> index cd55d80137f7..6970316943bb 100644
>> --- a/Documentation/devicetree/bindings/remoteproc/ti,pru-rproc.yaml
>> +++ b/Documentation/devicetree/bindings/remoteproc/ti,pru-rproc.yaml
>> @@ -66,6 +66,16 @@ properties:
>>        Should contain the name of the default firmware image
>>        file located on the firmware search path.
>>  
>> +  interrupts:
>> +    maxItems: 1
>> +    description:
>> +      Interrupt specifiers enable the virtio/rpmsg communication between MPU
>> +      and the PRU/RTU cores.
>> +
>> +  interrupt-names:
>> +    items:
>> +      - const: vring
>> +
>>  if:
>>    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.

>>  
>>        rtu0_0: rtu@...0 {
>> @@ -180,6 +193,9 @@ examples:
>>                <0x23400 0x100>;
>>          reg-names = "iram", "control", "debug";
>>          firmware-name = "am65x-rtu0_0-fw";
>> +        interrupt-parent = <&icssg0_intc>;
>> +        interrupts = <20 4 4>;
>> +        interrupt-names = "vring";
>>        };
>>  
>>        tx_pru0_0: txpru@...0 {
>> @@ -198,6 +214,9 @@ examples:
>>                <0x24400 0x100>;
>>          reg-names = "iram", "control", "debug";
>>          firmware-name = "am65x-pru0_1-fw";
>> +        interrupt-parent = <&icssg0_intc>;
>> +        interrupts = <18 3 3>;
>> +        interrupt-names = "vring";
>>        };
>>  
>>        rtu0_1: rtu@...0 {
>> @@ -207,6 +226,9 @@ examples:
>>                <0x23c00 0x100>;
>>          reg-names = "iram", "control", "debug";
>>          firmware-name = "am65x-rtu0_1-fw";
>> +        interrupt-parent = <&icssg0_intc>;
>> +        interrupts = <22 5 5>;
>> +        interrupt-names = "vring";
>>        };
>>  
>>        tx_pru0_1: txpru@...0 {
>> -- 
>> 2.34.1
>>

-- 
Thanks and Regards,
Danish.