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As a preparatory work, first describe the IMEM region and susbsequently add the required features. Across all SoCs, only initial 4KB can be accessed by all the masters in the SoC, remaining regions are access protected. Signed-off-by: Kathiravan Thirumoorthy --- Documentation/devicetree/bindings/sram/sram.yaml | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/Documentation/devicetree/bindings/sram/sram.yaml b/Documentati= on/devicetree/bindings/sram/sram.yaml index c451140962c86f4e8f98437a2830cb2c6a697e63..83e8c1e7070de782557fa7a3657= 3cc48cbe28c62 100644 --- a/Documentation/devicetree/bindings/sram/sram.yaml +++ b/Documentation/devicetree/bindings/sram/sram.yaml @@ -34,6 +34,11 @@ properties: - nvidia,tegra186-sysram - nvidia,tegra194-sysram - nvidia,tegra234-sysram + - qcom,ipq5018-imem + - qcom,ipq5332-imem + - qcom,ipq6018-imem + - qcom,ipq8074-imem + - qcom,ipq9574-imem - qcom,kaanapali-imem - qcom,rpm-msg-ram - rockchip,rk3288-pmu-sram --=20 2.34.1 From nobody Sat Apr 11 15:29:24 2026 Received: from mx0b-0031df01.pphosted.com (mx0b-0031df01.pphosted.com [205.220.180.131]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id DABE443E490 for ; 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Define the IMEM region to enable this functionality. As described, overall IMEM region is 24KB but only initial 4KB is accessible by all masters in the SoC. Signed-off-by: Kathiravan Thirumoorthy --- arch/arm64/boot/dts/qcom/ipq8074.dtsi | 11 +++++++++++ 1 file changed, 11 insertions(+) diff --git a/arch/arm64/boot/dts/qcom/ipq8074.dtsi b/arch/arm64/boot/dts/qc= om/ipq8074.dtsi index 256e12cf6d54417582a8b50e061f40719a4004a1..086b34ba7b09d68e24d2c1da28f= 303357ce503ea 100644 --- a/arch/arm64/boot/dts/qcom/ipq8074.dtsi +++ b/arch/arm64/boot/dts/qcom/ipq8074.dtsi @@ -625,6 +625,17 @@ qpic_nand: nand-controller@79b0000 { status =3D "disabled"; }; =20 + sram@8600000 { + compatible =3D "qcom,ipq8074-imem", "mmio-sram"; + reg =3D <0x08600000 0x6000>; + ranges =3D <0 0x08600000 0x6000>; + + no-memory-wc; + + #address-cells =3D <1>; + #size-cells =3D <1>; + }; + usb_0: usb@8af8800 { compatible =3D "qcom,ipq8074-dwc3", "qcom,dwc3"; reg =3D <0x08af8800 0x400>; --=20 2.34.1 From nobody Sat Apr 11 15:29:24 2026 Received: from mx0a-0031df01.pphosted.com (mx0a-0031df01.pphosted.com [205.220.168.131]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 3C9E243C05D for ; 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Define the IMEM region to enable this functionality. As described, overall IMEM region is 32KB but only initial 4KB is accessible by all masters in the SoC. Signed-off-by: Kathiravan Thirumoorthy --- arch/arm64/boot/dts/qcom/ipq6018.dtsi | 11 +++++++++++ 1 file changed, 11 insertions(+) diff --git a/arch/arm64/boot/dts/qcom/ipq6018.dtsi b/arch/arm64/boot/dts/qc= om/ipq6018.dtsi index 40f1c262126eff3761430a47472b52d27f961040..7d6f1821fcc8809c643ce974380= b02828b438b90 100644 --- a/arch/arm64/boot/dts/qcom/ipq6018.dtsi +++ b/arch/arm64/boot/dts/qcom/ipq6018.dtsi @@ -659,6 +659,17 @@ qpic_nand: nand-controller@79b0000 { status =3D "disabled"; }; =20 + sram@8600000 { + compatible =3D "qcom,ipq6018-imem", "mmio-sram"; + reg =3D <0x0 0x08600000 0x0 0x8000>; + ranges =3D <0 0 0x08600000 0x8000>; + + no-memory-wc; + + #address-cells =3D <1>; + #size-cells =3D <1>; + }; + usb3: usb@8af8800 { compatible =3D "qcom,ipq6018-dwc3", "qcom,dwc3"; reg =3D <0x0 0x08af8800 0x0 0x400>; --=20 2.34.1 From nobody Sat Apr 11 15:29:24 2026 Received: from mx0a-0031df01.pphosted.com (mx0a-0031df01.pphosted.com [205.220.168.131]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 816FF43E48F for ; 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Define the IMEM region to enable this functionality. As described, overall IMEM region is 80KB but only initial 4KB is accessible by all masters in the SoC. Signed-off-by: Kathiravan Thirumoorthy --- arch/arm64/boot/dts/qcom/ipq5018.dtsi | 11 +++++++++++ 1 file changed, 11 insertions(+) diff --git a/arch/arm64/boot/dts/qcom/ipq5018.dtsi b/arch/arm64/boot/dts/qc= om/ipq5018.dtsi index 6f8004a22a1ffdb6da0be410b772be5fe0473eef..591adae3918322f97a5dcd8b191= be1b50344e3d1 100644 --- a/arch/arm64/boot/dts/qcom/ipq5018.dtsi +++ b/arch/arm64/boot/dts/qcom/ipq5018.dtsi @@ -567,6 +567,17 @@ qpic_nand: spi@79b0000 { status =3D "disabled"; }; =20 + sram@8600000 { + compatible =3D "qcom,ipq5018-imem", "mmio-sram"; + reg =3D <0x08600000 0x14000>; + ranges =3D <0 0x08600000 0x14000>; + + no-memory-wc; + + #address-cells =3D <1>; + #size-cells =3D <1>; + }; + usb: usb@8af8800 { compatible =3D "qcom,ipq5018-dwc3", "qcom,dwc3"; reg =3D <0x08af8800 0x400>; --=20 2.34.1 From nobody Sat Apr 11 15:29:24 2026 Received: from mx0b-0031df01.pphosted.com (mx0b-0031df01.pphosted.com [205.220.180.131]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id D946943E49F for ; 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Define the IMEM region to enable this functionality. As described, overall IMEM region is 32KB but only initial 4KB is accessible by all masters in the SoC. Signed-off-by: Kathiravan Thirumoorthy --- arch/arm64/boot/dts/qcom/ipq9574.dtsi | 11 +++++++++++ 1 file changed, 11 insertions(+) diff --git a/arch/arm64/boot/dts/qcom/ipq9574.dtsi b/arch/arm64/boot/dts/qc= om/ipq9574.dtsi index d7278f2137ac58305cc4e82c1d6c26c08bc7a405..2ed111139c579787069def7f29f= 2d07e9a454e04 100644 --- a/arch/arm64/boot/dts/qcom/ipq9574.dtsi +++ b/arch/arm64/boot/dts/qcom/ipq9574.dtsi @@ -741,6 +741,17 @@ usb_0_qmpphy: phy@7d000 { status =3D "disabled"; }; =20 + sram@8600000 { + compatible =3D "qcom,ipq9574-imem", "mmio-sram"; + reg =3D <0x08600000 0x8000>; + ranges =3D <0 0x08600000 0x8000>; + + no-memory-wc; + + #address-cells =3D <1>; + #size-cells =3D <1>; + }; + usb3: usb@8af8800 { compatible =3D "qcom,ipq9574-dwc3", "qcom,dwc3"; reg =3D <0x08af8800 0x400>; --=20 2.34.1 From nobody Sat Apr 11 15:29:24 2026 Received: from mx0a-0031df01.pphosted.com (mx0a-0031df01.pphosted.com [205.220.168.131]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 8298F2E228D for ; 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Define the IMEM region to enable this functionality. As described, overall IMEM region is 80KB but only initial 4KB is accessible by all masters in the SoC. Signed-off-by: Kathiravan Thirumoorthy --- arch/arm64/boot/dts/qcom/ipq5332.dtsi | 11 +++++++++++ 1 file changed, 11 insertions(+) diff --git a/arch/arm64/boot/dts/qcom/ipq5332.dtsi b/arch/arm64/boot/dts/qc= om/ipq5332.dtsi index 45fc512a3bab221c0d99f819294abf63369987da..b5f87db419fe7c1cecd05b5a857= 45cc3971028e4 100644 --- a/arch/arm64/boot/dts/qcom/ipq5332.dtsi +++ b/arch/arm64/boot/dts/qcom/ipq5332.dtsi @@ -423,6 +423,17 @@ blsp1_spi2: spi@78b7000 { status =3D "disabled"; }; =20 + sram@8600000 { + compatible =3D "qcom,ipq5332-imem", "mmio-sram"; + reg =3D <0x08600000 0x14000>; + ranges =3D <0 0x08600000 0x14000>; + + no-memory-wc; + + #address-cells =3D <1>; + #size-cells =3D <1>; + }; + usb: usb@8af8800 { compatible =3D "qcom,ipq5332-dwc3", "qcom,dwc3"; reg =3D <0x08af8800 0x400>; --=20 2.34.1