linux-kernel - [PATCH 1/2] arm64: dts: ti: k3-j721e-evm: Add overlay for PCIE0 Endpoint Mode

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Message-ID: <20231020113222.3161829-2-s-vadapalli@ti.com>
Date:   Fri, 20 Oct 2023 17:02:21 +0530
From:   Siddharth Vadapalli <s-vadapalli@...com>
To:     <nm@...com>, <vigneshr@...com>, <kristo@...nel.org>,
        <robh+dt@...nel.org>, <krzysztof.kozlowski+dt@...aro.org>,
        <conor+dt@...nel.org>
CC:     <devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>, <r-gunasekaran@...com>,
        <srk@...com>, <s-vadapalli@...com>
Subject: [PATCH 1/2] arm64: dts: ti: k3-j721e-evm: Add overlay for PCIE0 Endpoint Mode

Add overlay to enable the PCIE0 instance of PCIe on J721E-EVM in
Endpoint mode of operation.

Signed-off-by: Siddharth Vadapalli <s-vadapalli@...com>
---
 arch/arm64/boot/dts/ti/Makefile               |  3 ++
 .../boot/dts/ti/k3-j721e-evm-pcie0-ep.dtso    | 53 +++++++++++++++++++
 2 files changed, 56 insertions(+)
 create mode 100644 arch/arm64/boot/dts/ti/k3-j721e-evm-pcie0-ep.dtso

diff --git a/arch/arm64/boot/dts/ti/Makefile b/arch/arm64/boot/dts/ti/Makefile
index 8bd5acc6d683..8d57ea89bf87 100644
--- a/arch/arm64/boot/dts/ti/Makefile
+++ b/arch/arm64/boot/dts/ti/Makefile
@@ -62,6 +62,8 @@ dtb-$(CONFIG_ARCH_K3) += k3-j7200-evm.dtb
 k3-j721e-evm-dtbs := k3-j721e-common-proc-board.dtb k3-j721e-evm-quad-port-eth-exp.dtbo
 dtb-$(CONFIG_ARCH_K3) += k3-j721e-beagleboneai64.dtb
 dtb-$(CONFIG_ARCH_K3) += k3-j721e-evm.dtb
+k3-j721e-evm-pcie0-ep-dtbs := k3-j721e-evm.dtb k3-j721e-evm-pcie0-ep.dtbo
+dtb-$(CONFIG_ARCH_K3) += k3-j721e-evm-pcie0-ep.dtb
 dtb-$(CONFIG_ARCH_K3) += k3-j721e-evm-gesi-exp-board.dtbo
 dtb-$(CONFIG_ARCH_K3) += k3-j721e-sk.dtb
 
@@ -81,4 +83,5 @@ DTC_FLAGS_k3-am625-sk += -@
 DTC_FLAGS_k3-am62-lp-sk += -@
 DTC_FLAGS_k3-am6548-iot2050-advanced-m2 += -@
 DTC_FLAGS_k3-j721e-common-proc-board += -@
+DTC_FLAGS_k3-j721e-evm += -@
 DTC_FLAGS_k3-j721s2-common-proc-board += -@
diff --git a/arch/arm64/boot/dts/ti/k3-j721e-evm-pcie0-ep.dtso b/arch/arm64/boot/dts/ti/k3-j721e-evm-pcie0-ep.dtso
new file mode 100644
index 000000000000..0c82a13b65a4
--- /dev/null
+++ b/arch/arm64/boot/dts/ti/k3-j721e-evm-pcie0-ep.dtso
@@ -0,0 +1,53 @@
+// SPDX-License-Identifier: GPL-2.0
+/**
+ * DT Overlay for enabling PCIE0 instance in Endpoint Configuration with the
+ * J7 common processor board.
+ *
+ * J7 Common Processor Board Product Link: https://www.ti.com/tool/J721EXCPXEVM
+ *
+ * Copyright (C) 2023 Texas Instruments Incorporated - https://www.ti.com/
+ */
+
+/dts-v1/;
+/plugin/;
+
+#include <dt-bindings/interrupt-controller/arm-gic.h>
+#include <dt-bindings/soc/ti,sci_pm_domain.h>
+
+#include "k3-pinctrl.h"
+
+/*
+ * Since Root Complex and Endpoint modes are mutually exclusive
+ * disable Root Complex mode.
+ */
+&pcie0_rc {
+	status = "disabled";
+};
+
+&cbass_main {
+	#address-cells = <2>;
+	#size-cells = <2>;
+	interrupt-parent = <&gic500>;
+
+	pcie0_ep: pcie-ep@...0000 {
+		compatible = "ti,j721e-pcie-ep";
+		reg = <0x00 0x02900000 0x00 0x1000>,
+		      <0x00 0x02907000 0x00 0x400>,
+		      <0x00 0x0d000000 0x00 0x00800000>,
+		      <0x00 0x10000000 0x00 0x08000000>;
+		reg-names = "intd_cfg", "user_cfg", "reg", "mem";
+		interrupt-names = "link_state";
+		interrupts = <GIC_SPI 318 IRQ_TYPE_EDGE_RISING>;
+		ti,syscon-pcie-ctrl = <&scm_conf 0x4070>;
+		max-link-speed = <3>;
+		num-lanes = <1>;
+		power-domains = <&k3_pds 239 TI_SCI_PD_EXCLUSIVE>;
+		clocks = <&k3_clks 239 1>;
+		clock-names = "fck";
+		max-functions = /bits/ 8 <6>;
+		max-virtual-functions = /bits/ 8 <4 4 4 4 0 0>;
+		dma-coherent;
+		phys = <&serdes0_pcie_link>;
+		phy-names = "pcie-phy";
+	};
+};
-- 
2.34.1