[PATCH v2 0/2] Describe IMEM on Milos

[PATCH v2 0/2] Describe IMEM on Milos

[Luca Weiss]

Add a compatible and describe the IMEM for the Milos SoC.

Signed-off-by: Luca Weiss <luca.weiss@fairphone.com>
---
Changes in v2:
- Use mmio-sram for describing IMEM
- Link to v1: https://patch.msgid.link/20260403-milos-imem-v1-0-4244ebb47017@fairphone.com

---
Luca Weiss (2):
      dt-bindings: sram: Document qcom,milos-imem
      arm64: dts: qcom: milos: Add IMEM node

 Documentation/devicetree/bindings/sram/sram.yaml |  1 +
 arch/arm64/boot/dts/qcom/milos.dtsi              | 20 ++++++++++++++++++++
 2 files changed, 21 insertions(+)
---
base-commit: 83acad05dee54a5cff0c98dd7962e55d4c6b145a
change-id: 20260403-milos-imem-3a034224946a

Best regards,
--  
Luca Weiss <luca.weiss@fairphone.com>

[PATCH v2 1/2] dt-bindings: sram: Document qcom,milos-imem

[Luca Weiss]

Add compatible for Milos SoC IMEM.

Signed-off-by: Luca Weiss <luca.weiss@fairphone.com>
---
 Documentation/devicetree/bindings/sram/sram.yaml | 1 +
 1 file changed, 1 insertion(+)

diff --git a/Documentation/devicetree/bindings/sram/sram.yaml b/Documentation/devicetree/bindings/sram/sram.yaml
index c451140962c8..cb2e11c73d98 100644
--- a/Documentation/devicetree/bindings/sram/sram.yaml
+++ b/Documentation/devicetree/bindings/sram/sram.yaml
@@ -35,6 +35,7 @@ properties:
         - nvidia,tegra194-sysram
         - nvidia,tegra234-sysram
         - qcom,kaanapali-imem
+        - qcom,milos-imem
         - qcom,rpm-msg-ram
         - rockchip,rk3288-pmu-sram
 

-- 
2.53.0

Re: [PATCH v2 1/2] dt-bindings: sram: Document qcom,milos-imem

[Krzysztof Kozlowski]

On Tue, Apr 07, 2026 at 05:11:10PM +0200, Luca Weiss wrote:
> Add compatible for Milos SoC IMEM.
> 
> Signed-off-by: Luca Weiss <luca.weiss@fairphone.com>
> ---
>  Documentation/devicetree/bindings/sram/sram.yaml | 1 +
>  1 file changed, 1 insertion(+)

Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@oss.qualcomm.com>

Best regards,
Krzysztof

[PATCH v2 2/2] arm64: dts: qcom: milos: Add IMEM node

[Luca Weiss]

Add a node for the IMEM found on Milos, which contains pil-reloc-info
and the modem tables for IPA, among others.

Signed-off-by: Luca Weiss <luca.weiss@fairphone.com>
---
Not happy about the names of the subnodes. pil-reloc-sram is not allowed
it seems. Glymur calls it "pil-sram@94c", not sure this is wanted?

Please advice.
---
 arch/arm64/boot/dts/qcom/milos.dtsi | 20 ++++++++++++++++++++
 1 file changed, 20 insertions(+)

diff --git a/arch/arm64/boot/dts/qcom/milos.dtsi b/arch/arm64/boot/dts/qcom/milos.dtsi
index 4a64a98a434b..0c69d5810f5e 100644
--- a/arch/arm64/boot/dts/qcom/milos.dtsi
+++ b/arch/arm64/boot/dts/qcom/milos.dtsi
@@ -2289,6 +2289,26 @@ scl-pins {
 			};
 		};
 
+		sram@14680000 {
+			compatible = "qcom,milos-imem", "mmio-sram";
+			reg = <0x0 0x14680000 0x0 0x2c000>;
+			ranges = <0 0 0x14680000 0x2c000>;
+
+			no-memory-wc;
+
+			#address-cells = <1>;
+			#size-cells = <1>;
+
+			pilreloc-sram@94c {
+				compatible = "qcom,pil-reloc-info";
+				reg = <0x94c 0xc8>;
+			};
+
+			ipa_modem_tables: modemtables-sram@3000 {
+				reg = <0x3000 0x2000>;
+			};
+		};
+
 		apps_smmu: iommu@15000000 {
 			compatible = "qcom,milos-smmu-500", "qcom,smmu-500", "arm,mmu-500";
 			reg = <0x0 0x15000000 0x0 0x100000>;

-- 
2.53.0

Re: [PATCH v2 2/2] arm64: dts: qcom: milos: Add IMEM node

[Krzysztof Kozlowski]

On Tue, Apr 07, 2026 at 05:11:11PM +0200, Luca Weiss wrote:
> Add a node for the IMEM found on Milos, which contains pil-reloc-info
> and the modem tables for IPA, among others.
> 
> Signed-off-by: Luca Weiss <luca.weiss@fairphone.com>
> ---
> Not happy about the names of the subnodes. pil-reloc-sram is not allowed
> it seems. Glymur calls it "pil-sram@94c", not sure this is wanted?
> 
> Please advice.
> ---
>  arch/arm64/boot/dts/qcom/milos.dtsi | 20 ++++++++++++++++++++
>  1 file changed, 20 insertions(+)
> 
> diff --git a/arch/arm64/boot/dts/qcom/milos.dtsi b/arch/arm64/boot/dts/qcom/milos.dtsi
> index 4a64a98a434b..0c69d5810f5e 100644
> --- a/arch/arm64/boot/dts/qcom/milos.dtsi
> +++ b/arch/arm64/boot/dts/qcom/milos.dtsi
> @@ -2289,6 +2289,26 @@ scl-pins {
>  			};
>  		};
>  
> +		sram@14680000 {
> +			compatible = "qcom,milos-imem", "mmio-sram";
> +			reg = <0x0 0x14680000 0x0 0x2c000>;
> +			ranges = <0 0 0x14680000 0x2c000>;

Use hex here as well.

Best regards,
Krzysztof

Re: [PATCH v2 2/2] arm64: dts: qcom: milos: Add IMEM node

[Luca Weiss]

Hi Krzysztof,

On Wed Apr 8, 2026 at 9:34 AM CEST, Krzysztof Kozlowski wrote:
> On Tue, Apr 07, 2026 at 05:11:11PM +0200, Luca Weiss wrote:
>> Add a node for the IMEM found on Milos, which contains pil-reloc-info
>> and the modem tables for IPA, among others.
>> 
>> Signed-off-by: Luca Weiss <luca.weiss@fairphone.com>
>> ---
>> Not happy about the names of the subnodes. pil-reloc-sram is not allowed
>> it seems. Glymur calls it "pil-sram@94c", not sure this is wanted?
>> 
>> Please advice.
>> ---
>>  arch/arm64/boot/dts/qcom/milos.dtsi | 20 ++++++++++++++++++++
>>  1 file changed, 20 insertions(+)
>> 
>> diff --git a/arch/arm64/boot/dts/qcom/milos.dtsi b/arch/arm64/boot/dts/qcom/milos.dtsi
>> index 4a64a98a434b..0c69d5810f5e 100644
>> --- a/arch/arm64/boot/dts/qcom/milos.dtsi
>> +++ b/arch/arm64/boot/dts/qcom/milos.dtsi
>> @@ -2289,6 +2289,26 @@ scl-pins {
>>  			};
>>  		};
>>  
>> +		sram@14680000 {
>> +			compatible = "qcom,milos-imem", "mmio-sram";
>> +			reg = <0x0 0x14680000 0x0 0x2c000>;
>> +			ranges = <0 0 0x14680000 0x2c000>;
>
> Use hex here as well.

Will do: ranges = <0x0 0x0 0x14680000 0x2c000>;

Do you also have a comment around the name of the subnodes? Do you think
they're okay as-is, or should they be changed?

Regards
Luca

Re: [PATCH v2 2/2] arm64: dts: qcom: milos: Add IMEM node

[Krzysztof Kozlowski]

On 08/04/2026 10:11, Luca Weiss wrote:
>>>  		};
>>>  
>>> +		sram@14680000 {
>>> +			compatible = "qcom,milos-imem", "mmio-sram";
>>> +			reg = <0x0 0x14680000 0x0 0x2c000>;
>>> +			ranges = <0 0 0x14680000 0x2c000>;
>>
>> Use hex here as well.
> 
> Will do: ranges = <0x0 0x0 0x14680000 0x2c000>;
> 
> Do you also have a comment around the name of the subnodes? Do you think
> they're okay as-is, or should they be changed?

I think they follow what the binding expects, so not much to discuss here :)

Best regards,
Krzysztof

Re: [PATCH v2 2/2] arm64: dts: qcom: milos: Add IMEM node

[Konrad Dybcio]

On 4/7/26 5:11 PM, Luca Weiss wrote:
> Add a node for the IMEM found on Milos, which contains pil-reloc-info
> and the modem tables for IPA, among others.
> 
> Signed-off-by: Luca Weiss <luca.weiss@fairphone.com>
> ---
> Not happy about the names of the subnodes. pil-reloc-sram is not allowed
> it seems. Glymur calls it "pil-sram@94c", not sure this is wanted?

Not really.. I had a patch for that, I'll send it rn

Konrad