linux-kernel - [PATCH 6/7] arm64: dts: ti: k3-am62a: Add cpsw-mac-efuse node to wkup

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Date: Fri, 28 Jun 2024 10:15:17 -0500
From: Andrew Davis <afd@...com>
To: Nishanth Menon <nm@...com>, Vignesh Raghavendra <vigneshr@...com>,
        Tero
 Kristo <kristo@...nel.org>, Rob Herring <robh+dt@...nel.org>,
        Krzysztof
 Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Conor Dooley
	<conor+dt@...nel.org>,
        Jan Kiszka <jan.kiszka@...mens.com>
CC: <linux-arm-kernel@...ts.infradead.org>, <devicetree@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>, Andrew Davis <afd@...com>
Subject: [PATCH 6/7] arm64: dts: ti: k3-am62a: Add cpsw-mac-efuse node to wkup_conf

The WKUP system controller address region contains an eFuse block with
MAC addresses to be used by the Ethernet controller. The property
“ti,syscon-efuse” contains a phandle to a syscon region and an offset
into this region where the MAC addresses can be found. Currently
"ti,syscon-efuse" points to the entire system controller address space
node with an offset to the eFuse IP address.

Instead add a cpsw-mac-efuse node to describe the exact eFuse area. Then
point the Ethernet controller directly to this region, no offset needed.

This makes it so the system controller memory area does not need to be one
big syscon area, describe this bus address area as the simple-bus it is.

Signed-off-by: Andrew Davis <afd@...com>
---
 arch/arm64/boot/dts/ti/k3-am62a-main.dtsi   |  2 +-
 arch/arm64/boot/dts/ti/k3-am62a-wakeup.dtsi | 10 +++++++---
 2 files changed, 8 insertions(+), 4 deletions(-)

diff --git a/arch/arm64/boot/dts/ti/k3-am62a-main.dtsi b/arch/arm64/boot/dts/ti/k3-am62a-main.dtsi
index ce4a2f1056300..6b81abec8a145 100644
--- a/arch/arm64/boot/dts/ti/k3-am62a-main.dtsi
+++ b/arch/arm64/boot/dts/ti/k3-am62a-main.dtsi
@@ -713,7 +713,7 @@ cpsw_port1: port@1 {
 				label = "port1";
 				phys = <&phy_gmii_sel 1>;
 				mac-address = [00 00 00 00 00 00];
-				ti,syscon-efuse = <&wkup_conf 0x200>;
+				ti,syscon-efuse = <&cpsw_mac_syscon 0x0>;
 			};
 
 			cpsw_port2: port@2 {
diff --git a/arch/arm64/boot/dts/ti/k3-am62a-wakeup.dtsi b/arch/arm64/boot/dts/ti/k3-am62a-wakeup.dtsi
index 5c5aca4bb9258..f5ac101a04dfa 100644
--- a/arch/arm64/boot/dts/ti/k3-am62a-wakeup.dtsi
+++ b/arch/arm64/boot/dts/ti/k3-am62a-wakeup.dtsi
@@ -6,9 +6,8 @@
  */
 
 &cbass_wakeup {
-	wkup_conf: syscon@...00000 {
-		compatible = "ti,j721e-system-controller", "syscon", "simple-mfd";
-		reg = <0x00 0x43000000 0x00 0x20000>;
+	wkup_conf: bus@...00000 {
+		compatible = "simple-bus";
 		#address-cells = <1>;
 		#size-cells = <1>;
 		ranges = <0x00 0x00 0x43000000 0x20000>;
@@ -18,6 +17,11 @@ chipid: chipid@14 {
 			reg = <0x14 0x4>;
 		};
 
+		cpsw_mac_syscon: ethernet-mac-syscon@200 {
+			compatible = "ti,am62p-cpsw-mac-efuse", "syscon";
+			reg = <0x200 0x8>;
+		};
+
 		usb0_phy_ctrl: syscon@...8 {
 			compatible = "ti,am62-usb-phy-ctrl", "syscon";
 			reg = <0x4008 0x4>;
-- 
2.39.2