Re: [PATCH v2 3/4] arm64: dts: qcom: monaco: add RAS error source nodes

[Umang Chheda <umang.chheda@oss.qualcomm.com>]

Hello Bjorn,

On 8/2/2026 9:19 AM, Bjorn Andersson wrote:
> On Mon, Jul 20, 2026 at 01:49:53PM +0530, Umang Chheda wrote:
>> Add RAS error source nodes for the Monaco SoC.
> 
> Why is the subject "repeated" here?

Ack, will fix this in v3.

> 
>>
>> Two processor error sources are described: a per-PE node covering the
>> L1/L2 cache hierarchy using a PPI, and two shared L3 cache nodes for
>> the two CPU clusters using SPIs.
> 
> Please read
> https://docs.kernel.org/process/submitting-patches.html#describe-your-changes
> and don't assume the reader know what this is and why it might be
> useful.

Ack, got it- will update the commit text to reflect what it is and why
it is required.

> 
>>
>> Co-developed-by: Faruque Ansari <faruque.ansari@oss.qualcomm.com>
>> Signed-off-by: Faruque Ansari <faruque.ansari@oss.qualcomm.com>
>> Signed-off-by: Umang Chheda <umang.chheda@oss.qualcomm.com>
>> ---
>>  arch/arm64/boot/dts/qcom/monaco.dtsi | 30 ++++++++++++++++++++++++++++
>>  1 file changed, 30 insertions(+)
>>
>> diff --git a/arch/arm64/boot/dts/qcom/monaco.dtsi b/arch/arm64/boot/dts/qcom/monaco.dtsi
>> index 64fc0d592282..4fbd1dc9a147 100644
>> --- a/arch/arm64/boot/dts/qcom/monaco.dtsi
>> +++ b/arch/arm64/boot/dts/qcom/monaco.dtsi
>> @@ -724,6 +724,36 @@ system_pd: power-domain-system {
>>  		};
>>  	};
>>
>> +	ras-l1l2-0 {
> 
> Why is there a -0 suffix on this node?

Ack, -0 is not needed here - will fix this in v3 to use generic node name.

> 
> Regards,
> Bjorn
> 
>> +		compatible = "arm,ras-processor";
>> +		arm,num-records = <1>;
>> +		arm,record-impl = /bits/ 64 <0x1>;
>> +		arm,status-reporting = /bits/ 64 <0x1>;
>> +		cache = <&l2_0>;
>> +		interrupts = <GIC_PPI 0 IRQ_TYPE_LEVEL_LOW>;
>> +		interrupt-names = "fhi";
>> +	};
>> +
>> +	ras-l3-cluster0 {
>> +		compatible = "arm,ras-processor";
>> +		arm,num-records = <2>;
>> +		arm,record-impl = /bits/ 64 <0x2>;
>> +		arm,status-reporting = /bits/ 64 <0x2>;
>> +		cache = <&l3_0>;
>> +		interrupts = <GIC_SPI 36 IRQ_TYPE_LEVEL_HIGH>;
>> +		interrupt-names = "fhi";
>> +	};
>> +
>> +	ras-l3-cluster1 {
>> +		compatible = "arm,ras-processor";
>> +		arm,num-records = <2>;
>> +		arm,record-impl = /bits/ 64 <0x2>;
>> +		arm,status-reporting = /bits/ 64 <0x2>;
>> +		cache = <&l3_1>;
>> +		interrupts = <GIC_SPI 21 IRQ_TYPE_LEVEL_HIGH>;
>> +		interrupt-names = "fhi";
>> +	};
>> +
>>  	reserved-memory {
>>  		#address-cells = <2>;
>>  		#size-cells = <2>;
>> --
>> 2.34.1
>>

Thanks,
Umang