Re: [PATCH 3/7] arm64: dts: qcom: ipq6018: Add the IMEM node

[Kathiravan Thirumoorthy <kathiravan.thirumoorthy@oss.qualcomm.com>]

On 7/2/2025 6:29 PM, Konrad Dybcio wrote:
> On 7/2/25 12:17 PM, Kathiravan Thirumoorthy wrote:
>> Add the IMEM node to the device tree to extract debugging information
>> like system restart reason, which is populated via IMEM. Define the
>> IMEM region to enable this functionality.
>>
>> As described, overall IMEM region is approximately 32KB but only initial
>> 4KB is accessible by all masters in the SoC.
>>
>> Signed-off-by: Kathiravan Thirumoorthy <kathiravan.thirumoorthy@oss.qualcomm.com>
>> ---
>>   arch/arm64/boot/dts/qcom/ipq6018.dtsi | 9 +++++++++
>>   1 file changed, 9 insertions(+)
>>
>> diff --git a/arch/arm64/boot/dts/qcom/ipq6018.dtsi b/arch/arm64/boot/dts/qcom/ipq6018.dtsi
>> index bfe59b0208415902c69fd0c0c7565d97997d4207..7eca5ba416c2ef5ef1c4e0eb4f58f1ca94fc92f0 100644
>> --- a/arch/arm64/boot/dts/qcom/ipq6018.dtsi
>> +++ b/arch/arm64/boot/dts/qcom/ipq6018.dtsi
>> @@ -659,6 +659,15 @@ qpic_nand: nand-controller@79b0000 {
>>   			status = "disabled";
>>   		};
>>   
>> +		sram@8600000 {
>> +			compatible = "qcom,ipq6018-imem", "syscon", "simple-mfd";
>> +			reg = <0 0x08600000 0 0x7fff>;
>> +			ranges = <0 0 0x08600000 0x7fff>;
> I firmly believe there's an off-by-one in the docs and there
> isn't an odd number of bytes reserved in the hw
Thanks, I cross checked this in the SoC and I'm able to access the full 
4 byte at the end. Let me fix this up in the V2.
>
> Konrad