Re: [PATCH v3 RESEND 3/5] arm64: dts: qcom: Add device tree for Nord SA8797P SoC

[Deepti Jaggi]

On 7/6/2026 8:38 PM, Pavan Kondeti wrote:
> On Mon, Jul 06, 2026 at 07:15:15PM -0700, Deepti Jaggi wrote:
>>
>>
>> On 7/6/2026 6:57 AM, Pavan Kondeti wrote:
>>> On Tue, May 26, 2026 at 01:12:58PM +0800, Shawn Guo wrote:
>>>> diff --git a/arch/arm64/boot/dts/qcom/scmi-common.dtsi b/arch/arm64/boot/dts/qcom/scmi-common.dtsi
>>>> new file mode 100644
>>>> index 000000000000..0c7ffe9e415c
>>>> --- /dev/null
>>>> +++ b/arch/arm64/boot/dts/qcom/scmi-common.dtsi
>>>> @@ -0,0 +1,1918 @@
>>>> +// SPDX-License-Identifier: BSD-3-Clause
>>>> +/*
>>>> + * Copyright (c) Qualcomm Technologies, Inc. and/or its subsidiaries.
>>>> + */
>>>> +
>>>> +#include <dt-bindings/interrupt-controller/arm-gic.h>
>>>> +
>>>> +&firmware {
>>>> +	scmi0: scmi-0 {
>>>> +		compatible = "qcom,scmi-smc";
>>>> +		arm,smc-id = <0xc6008012>;
>>>> +		shmem = <&shmem0>;
>>>> +		interrupts = <GIC_SPI 963 IRQ_TYPE_EDGE_RISING>;
>>>> +		interrupt-names = "a2p";
>>>
>>> I believe this interrupt source is GearVM firmware via Gunyah's
>>> doorbell, correct? How do we know that scmi0 instance's interrupt 
>>> is GIC_SPI#963? Are these assumed to be constant/fixed through out
>>> the life time of this SoC?
>>
>> Yes, this interrupt is a Gunyah Rx doorbell VIRQ for SCMI a2p completion
>> from GearVM to Linux. It is allocated by Gunyah RM from the platform's virtual
>> IRQ range and patched into the DTB by Linux bootloader at boot stage.
>>  
>>>
> 
> Thanks Deepti. IIUC, GIC_SPI#963 may be overridden by bootloader and
> potentially this IRQ can change across runs or when firmware is changed
> etc. The interrupt property is a place holder. can you confirm please?
>

IRQ will not change across runs , it may change with firmware updates.
 > Thanks,
> Pavan