linux-kernel - [PATCH v2 2/3] arm64: dts: ti: k3-am625: Add OLDI support

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Message-ID: <20250925100038.3008298-2-w.egorov@phytec.de>
Date: Thu, 25 Sep 2025 12:00:37 +0200
From: Wadim Egorov <w.egorov@...tec.de>
To: <nm@...com>, <vigneshr@...com>, <kristo@...nel.org>, <robh@...nel.org>,
	<krzk+dt@...nel.org>, <conor+dt@...nel.org>, <aradhya.bhatia@...ux.dev>
CC: <linux-arm-kernel@...ts.infradead.org>, <devicetree@...r.kernel.org>,
	<linux-kernel@...r.kernel.org>, <upstream@...ts.phytec.de>
Subject: [PATCH v2 2/3] arm64: dts: ti: k3-am625: Add OLDI support

From: Aradhya Bhatia <a-bhatia1@...com>

The AM625 SoC has 2 OLDI TXes under the DSS. Add their support.

Signed-off-by: Aradhya Bhatia <a-bhatia1@...com>
Signed-off-by: Swamil Jain <s-jain1@...com>
Signed-off-by: Wadim Egorov <w.egorov@...tec.de>
---
v1: https://lists.infradead.org/pipermail/linux-arm-kernel/2025-September/1065766.html
v2:
  - Add dummy nodes for ports to fix dt-schema warnings
    'port' is a required property
---
 arch/arm64/boot/dts/ti/k3-am62-main.dtsi | 52 ++++++++++++++++++++++++
 1 file changed, 52 insertions(+)

diff --git a/arch/arm64/boot/dts/ti/k3-am62-main.dtsi b/arch/arm64/boot/dts/ti/k3-am62-main.dtsi
index ffa485545a5f..9a1dc117d6fb 100644
--- a/arch/arm64/boot/dts/ti/k3-am62-main.dtsi
+++ b/arch/arm64/boot/dts/ti/k3-am62-main.dtsi
@@ -793,6 +793,58 @@ dss: dss@...00000 {
 		interrupts = <GIC_SPI 84 IRQ_TYPE_LEVEL_HIGH>;
 		status = "disabled";
 
+		oldi-transmitters {
+			#address-cells = <1>;
+			#size-cells = <0>;
+
+			oldi0: oldi@0 {
+				reg = <0>;
+				clocks = <&k3_clks 186 0>;
+				clock-names = "serial";
+				ti,oldi-io-ctrl = <&dss_oldi_io_ctrl>;
+				status = "disabled";
+
+				oldi0_ports: ports {
+					#address-cells = <1>;
+					#size-cells = <0>;
+
+					oldi0_port0: port@0 {
+					    reg = <0>;
+					};
+
+					oldi0_port1: port@1 {
+					    reg = <1>;
+					};
+				};
+			};
+
+			/*
+			 * OLDI1 in AM625 SoC can only act as a secondary OLDI, if
+			 * required, hence the clock and io-ctrl properties are not
+			 * required at the moment.
+			 */
+			oldi1: oldi@1 {
+				reg = <1>;
+				clocks = <&k3_clks 186 0>;
+				clock-names = "serial";
+				ti,oldi-io-ctrl = <&dss_oldi_io_ctrl>;
+				status = "disabled";
+
+				oldi1_ports: ports {
+					#address-cells = <1>;
+					#size-cells = <0>;
+
+					oldi1_port0: port@0 {
+					    reg = <0>;
+					};
+
+					oldi1_port1: port@1 {
+					    reg = <1>;
+					};
+				};
+			};
+		};
+
 		dss_ports: ports {
 			#address-cells = <1>;
 			#size-cells = <0>;
-- 
2.48.1