linux-kernel - [PATCH RFC 3/3] arm64: dts: qcom: ipq8074: add remoteproc nodes

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Message-ID: <20251210003729.3909663-4-mr.nuke.me@gmail.com>
Date: Tue,  9 Dec 2025 18:37:25 -0600
From: Alexandru Gagniuc <mr.nuke.me@...il.com>
To: robh@...nel.org,
	krzk+dt@...nel.org,
	conor+dt@...nel.org,
	devicetree@...r.kernel.org,
	Bjorn Andersson <andersson@...nel.org>,
	Konrad Dybcio <konradybcio@...nel.org>
Cc: mathieu.poirier@...aro.org,
	linux-arm-msm@...r.kernel.org,
	linux-remoteproc@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	Alexandru Gagniuc <mr.nuke.me@...il.com>
Subject: [PATCH RFC 3/3] arm64: dts: qcom: ipq8074: add remoteproc nodes

Add the nodes for the WCSS remoteproc loader on IPQ8074, so that there
a use case for the DT bindings. GCC_WCSSAON_RESET is not implemented
by the GCC reset controller, so use a placeholder value for now. Leave
the node disabled so that remoteproc doesn't start up with the missing
reset.

Signed-off-by: Alexandru Gagniuc <mr.nuke.me@...il.com>
---
 arch/arm64/boot/dts/qcom/ipq8074.dtsi | 79 +++++++++++++++++++++++++++
 1 file changed, 79 insertions(+)

diff --git a/arch/arm64/boot/dts/qcom/ipq8074.dtsi b/arch/arm64/boot/dts/qcom/ipq8074.dtsi
index 256e12cf6d544..86369fa680553 100644
--- a/arch/arm64/boot/dts/qcom/ipq8074.dtsi
+++ b/arch/arm64/boot/dts/qcom/ipq8074.dtsi
@@ -108,6 +108,11 @@ memory@...00000 {
 			reg = <0x0 0x4ac00000 0x0 0x400000>;
 			no-map;
 		};
+
+		q6_region: wcnss@...00000 {
+			reg = <0x0 0x4b000000 0x0 0x03700000>;
+			no-map;
+		};
 	};
 
 	firmware {
@@ -390,6 +395,11 @@ tcsr: syscon@...7000 {
 			reg = <0x01937000 0x21000>;
 		};
 
+		tcsr_q6: syscon@...5000 {
+			compatible = "qcom,tcsr-ipq8074", "syscon";
+			reg = <0x01945000 0xe000>;
+		};
+
 		spmi_bus: spmi@...f000 {
 			compatible = "qcom,spmi-pmic-arb";
 			reg = <0x0200f000 0x001000>,
@@ -1003,6 +1013,50 @@ pcie@0 {
 				ranges;
 			};
 		};
+
+		q6v5_wcss: remoteproc@...0000 {
+			compatible = "qcom,ipq8074-wcss-pil";
+			reg = <0x0cd00000 0x4040>,
+			      <0x004ab000 0x20>;
+			reg-names = "qdsp6",
+				    "rmb";
+
+			interrupts-extended = <&intc GIC_SPI 325 IRQ_TYPE_EDGE_RISING>,
+					      <&wcss_smp2p_in 0 0>,
+					      <&wcss_smp2p_in 1 0>,
+					      <&wcss_smp2p_in 2 0>,
+					      <&wcss_smp2p_in 3 0>;
+			interrupt-names = "wdog",
+					  "fatal",
+					  "ready",
+					  "handover",
+					  "stop-ack";
+
+			resets = <&gcc 0xffff>, /* GCC_WCSSAON_RESET */
+				 <&gcc GCC_WCSS_BCR>,
+				 <&gcc GCC_WCSS_Q6_BCR>;
+
+			reset-names = "wcss_aon_reset",
+				      "wcss_reset",
+				      "wcss_q6_reset";
+
+			memory-region = <&q6_region>;
+			qcom,halt-regs = <&tcsr_q6 0xa000 0xd000 0x0>;
+
+			qcom,smem-states = <&wcss_smp2p_out 0>,
+					   <&wcss_smp2p_out 1>;
+			qcom,smem-state-names = "shutdown",
+						"stop";
+
+			status = "disabled";
+
+			glink-edge {
+				interrupts = <GIC_SPI 321 IRQ_TYPE_EDGE_RISING>;
+				label = "rtr";
+				qcom,remote-pid = <1>;
+				mboxes = <&apcs_glb 8>;
+			};
+		};
 	};
 
 	timer {
@@ -1182,4 +1236,29 @@ wcss-phyb1-crit {
 			};
 		};
 	};
+
+	wcss: smp2p-wcss {
+		compatible = "qcom,smp2p";
+		qcom,smem = <435>, <428>;
+
+		interrupt-parent = <&intc>;
+		interrupts = <GIC_SPI 322 IRQ_TYPE_EDGE_RISING>;
+
+		mboxes = <&apcs_glb 9>;
+
+		qcom,local-pid = <0>;
+		qcom,remote-pid = <1>;
+
+		wcss_smp2p_out: master-kernel {
+			qcom,entry-name = "master-kernel";
+			#qcom,smem-state-cells = <1>;
+		};
+
+		wcss_smp2p_in: slave-kernel {
+			qcom,entry-name = "slave-kernel";
+
+			interrupt-controller;
+			#interrupt-cells = <2>;
+		};
+	};
 };
-- 
2.45.1