Re: [PATCH 2/2] arm64: dts: qcom: sm8450: Add IMEM and PIL info region

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+@alex,

Please comment.

-Mukesh

On 2/7/2023 2:34 AM, Bjorn Andersson wrote:
On Mon, Feb 06, 2023 at 08:06:13PM +0530, Mukesh Ojha wrote:


On 2/4/2023 3:07 AM, Konrad Dybcio wrote:


On 3.02.2023 18:04, Mukesh Ojha wrote:
Add a simple-mfd representing IMEM on SM8450 and define the PIL
relocation info region, so that post mortem tools will be able
to locate the loaded remoteprocs.

Signed-off-by: Mukesh Ojha <quic_mojha@xxxxxxxxxxx>
---
  From XBL:

0x14680000, 0x0002A000, "IMEM Base"

Is there anything in that wider address range that would interest
us? I recall Alex once dug into that when diving into IPA, but
I can not recall the conclusion..
Spec-wise, yes IPA do own these 0x146A8000 - 0x146AA000 .
But, not sure what they use it for.


The DT should not reflect the organization structure. Let's see if Alex
have any input on this.

Thanks,
Bjorn

-Mukesh

Konrad
   arch/arm64/boot/dts/qcom/sm8450.dtsi | 15 +++++++++++++++
   1 file changed, 15 insertions(+)

diff --git a/arch/arm64/boot/dts/qcom/sm8450.dtsi b/arch/arm64/boot/dts/qcom/sm8450.dtsi
index 5704750..474ea1b 100644
--- a/arch/arm64/boot/dts/qcom/sm8450.dtsi
+++ b/arch/arm64/boot/dts/qcom/sm8450.dtsi
@@ -3536,6 +3536,21 @@
   			};
   		};
+		sram@146aa000 {
+			compatible = "qcom,sm8450-imem", "syscon", "simple-mfd";
+			reg = <0 0x146aa000 0 0x1000>;
+
+			#address-cells = <1>;
+			#size-cells = <1>;
+
+			ranges = <0 0 0x146aa000 0x1000>;
+
+			pil-reloc@94c {
+				compatible = "qcom,pil-reloc-info";
+				reg = <0x94c 0xc8>;
+			};
+		};
+
   		apps_rsc: rsc@17a00000 {
   			label = "apps_rsc";
   			compatible = "qcom,rpmh-rsc";



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