FROMLIST: arm64: dts: qcom: kodiak: Add EL2 overlay

All the existing variants Kodiak boards are using Gunyah hypervisor
which means that, so far, Linux-based OS could only boot in EL1 on those
devices.  However, it is possible for us to boot Linux at EL2 on these
devices [1].

When running under Gunyah, the remote processor firmware IOMMU
streams are controlled by Gunyah. However, without Gunyah, the IOMMU is
managed by the consumer of this DeviceTree. Therefore, describe the
firmware streams for each remote processor.

Add a EL2-specific DT overlay and apply it to Kodiak IOT variant
devices to create -el2.dtb for each of them alongside "normal" dtb.

[1]
https://docs.qualcomm.com/bundle/publicresource/topics/80-70020-4/boot-developer-touchpoints.html#uefi

Link: https://lore.kernel.org/lkml/20260327131043.627120-2-sumit.garg@kernel.org/
Signed-off-by: Mukesh Ojha <mukesh.ojha@oss.qualcomm.com>
[SG: watchdog fixup]
Signed-off-by: Sumit Garg <sumit.garg@oss.qualcomm.com>
[Mukesh: Added support for more variants]
Signed-off-by: Mukesh Ojha <mukesh.ojha@oss.qualcomm.com>

Author: mukeshojha-linux

arch/arm64/boot/dts/qcom/Makefile

@@ -149,7 +149,11 @@ dtb-$(CONFIG_ARCH_QCOM)	+= msm8998-sony-xperia-yoshino-poplar.dtb
 dtb-$(CONFIG_ARCH_QCOM)	+= msm8998-xiaomi-sagit.dtb
 dtb-$(CONFIG_ARCH_QCOM)	+= purwa-iot-evk.dtb
 dtb-$(CONFIG_ARCH_QCOM)	+= qcm6490-fairphone-fp5.dtb
+
 dtb-$(CONFIG_ARCH_QCOM)	+= qcm6490-idp.dtb
+qcm6490-idp-el2-dtbs := qcm6490-idp.dtb kodiak-el2.dtbo
+dtb-$(CONFIG_ARCH_QCOM)	+= qcm6490-idp-el2.dtb
+
 dtb-$(CONFIG_ARCH_QCOM)	+= qcm6490-particle-tachyon.dtb
 dtb-$(CONFIG_ARCH_QCOM)	+= qcm6490-shift-otter.dtb
 dtb-$(CONFIG_ARCH_QCOM)	+= qcs404-evb-1000.dtb
@@ -161,12 +165,19 @@ qcs615-ride-el2-dtbs := qcs615-ride.dtb talos-el2.dtbo
 dtb-$(CONFIG_ARCH_QCOM)	+= qcs615-ride-el2.dtb
 
 dtb-$(CONFIG_ARCH_QCOM)	+= qcs6490-rb3gen2.dtb
+qcs6490-rb3gen2-el2-dtbs := qcs6490-rb3gen2.dtb kodiak-el2.dtbo
+dtb-$(CONFIG_ARCH_QCOM)	+= qcs6490-rb3gen2-el2.dtb
 
 qcs6490-rb3gen2-vision-mezzanine-dtbs := qcs6490-rb3gen2.dtb qcs6490-rb3gen2-vision-mezzanine.dtbo
 qcs6490-rb3gen2-industrial-mezzanine-dtbs := qcs6490-rb3gen2.dtb qcs6490-rb3gen2-industrial-mezzanine.dtbo
 
 dtb-$(CONFIG_ARCH_QCOM)	+= qcs6490-rb3gen2-industrial-mezzanine.dtb
+qcs6490-rb3gen2-industrial-mezzanine-el2-dtbs := qcs6490-rb3gen2-industrial-mezzanine.dtb kodiak-el2.dtbo
+dtb-$(CONFIG_ARCH_QCOM)	+= qcs6490-rb3gen2-industrial-mezzanine-el2.dtb
+
 dtb-$(CONFIG_ARCH_QCOM)	+= qcs6490-rb3gen2-vision-mezzanine.dtb
+qcs6490-rb3gen2-vision-mezzanine-el2-dtbs := qcs6490-rb3gen2-vision-mezzanine.dtb kodiak-el2.dtbo
+dtb-$(CONFIG_ARCH_QCOM)	+= qcs6490-rb3gen2-vision-mezzanine-el2.dtb
 
 dtb-$(CONFIG_ARCH_QCOM)	+= qcs8300-ride.dtb
 

arch/arm64/boot/dts/qcom/kodiak-el2.dtso

@@ -0,0 +1,35 @@
+// SPDX-License-Identifier: BSD-3-Clause
+/*
+ * Copyright (c) Qualcomm Technologies, Inc. and/or its subsidiaries.
+ *
+ * Kodiak specific modifications required to boot in EL2.
+ */
+
+
+/dts-v1/;
+/plugin/;
+
+&gpu_zap_shader {
+	status = "disabled";
+};
+
+&remoteproc_adsp {
+	iommus = <&apps_smmu 0x1800 0x0>;
+};
+
+&remoteproc_cdsp {
+	iommus = <&apps_smmu 0x11a0 0x0400>;
+};
+
+&remoteproc_wpss {
+	iommus = <&apps_smmu 0x1c03 0x1>,
+		 <&apps_smmu 0x1c83 0x1>;
+};
+
+&venus {
+	status = "disabled";
+};
+
+&watchdog {
+	status = "okay";
+};