linux-kernel - [PATCH v4] arm64: dts: ti: k3-am62p: use eFuse MAC Address for CPSW3G Port 1

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Date: Tue, 4 Jun 2024 16:14:25 +0530
From: Siddharth Vadapalli <s-vadapalli@...com>
To: <nm@...com>, <vigneshr@...com>, <kristo@...nel.org>, <robh@...nel.org>,
        <krzk+dt@...nel.org>, <conor+dt@...nel.org>
CC: <devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>, <srk@...com>,
        <s-vadapalli@...com>
Subject: [PATCH v4] arm64: dts: ti: k3-am62p: use eFuse MAC Address for CPSW3G Port 1

Add the "ethernet-mac-syscon" node within "wkup_conf" node corresponding to
the CTRLMMR_MAC_IDx registers within the CTRL_MMR space. Assign the
compatible "ti,am62p-cpsw-mac-efuse" to enable "syscon_regmap" operations
on these registers. The MAC Address programmed in the eFuse is accessible
through the CTRLMMR_MAC_IDx registers. The "ti,syscon-efuse" device-tree
property points to the CTRLMMR_MAC_IDx registers, allowing the CPSW driver
to fetch the MAC Address and assign it to the network interface associated
with CPSW3G MAC Port 1.

Signed-off-by: Siddharth Vadapalli <s-vadapalli@...com>
Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
---

Hello,

This patch is based on linux-next tagged next-20240604.
v3 of this patch is at:
https://lore.kernel.org/r/20240404124614.891416-1-s-vadapalli@ti.com/
Changes since v3:
- Rebased patch on next-20240604.
- Collected Acked-by tag.

This patch no longer has any dependencies since the dependent patch
mentioned in v3 which is:
https://patchwork.kernel.org/project/linux-arm-kernel/patch/20240402105708.4114146-1-s-vadapalli@ti.com/
has been merged.

Test Logs on AM62p:
https://gist.github.com/Siddharth-Vadapalli-at-TI/d804e1b1cbd0a32bc8d563923f3211c0

Regards,
Siddharth.

 arch/arm64/boot/dts/ti/k3-am62p-main.dtsi   | 1 +
 arch/arm64/boot/dts/ti/k3-am62p-wakeup.dtsi | 5 +++++
 2 files changed, 6 insertions(+)

diff --git a/arch/arm64/boot/dts/ti/k3-am62p-main.dtsi b/arch/arm64/boot/dts/ti/k3-am62p-main.dtsi
index 900d1f9530a2..22f8f1359bc5 100644
--- a/arch/arm64/boot/dts/ti/k3-am62p-main.dtsi
+++ b/arch/arm64/boot/dts/ti/k3-am62p-main.dtsi
@@ -749,6 +749,7 @@ cpsw_port1: port@1 {
 				label = "port1";
 				phys = <&phy_gmii_sel 1>;
 				mac-address = [00 00 00 00 00 00];
+				ti,syscon-efuse = <&cpsw_mac_syscon 0x0>;
 				status = "disabled";
 			};
 
diff --git a/arch/arm64/boot/dts/ti/k3-am62p-wakeup.dtsi b/arch/arm64/boot/dts/ti/k3-am62p-wakeup.dtsi
index c71d9624ea27..71784e10b4f1 100644
--- a/arch/arm64/boot/dts/ti/k3-am62p-wakeup.dtsi
+++ b/arch/arm64/boot/dts/ti/k3-am62p-wakeup.dtsi
@@ -19,6 +19,11 @@ chipid: chipid@14 {
 			bootph-all;
 		};
 
+		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>;
-- 
2.40.1