[PATCH v3] arm64: dts: ti: Add k3-am62p-wakeup.dtsi for AM62PX efuse GP_SW1

Create k3-am62p-wakeup.dtsi which includes AM62P-specific WAKEUP
domain nodes.

In k3-am62p-wakeup.dtsi, add efuse node for GP_SW registers at offset
0x230. GP_SW1 at offset 0x4 will be used to determine AM62P silicon
revision.

Signed-off-by: Judith Mendez <jm@ti.com>
Reviewed-by: Moteen Shah <redacted>
---
This patch adds GP_SW1 efuse node for AM62PX only now that bindings [0]
are in place.

Changes since v2:
- Add Moteen's review tag
- Fix commit description as per Moteens review [1]

[0] https://lore.kernel.org/all/178942274041.683176.599438200260103620.b4-ty@kernel.org/ (local)
[1] https://lore.kernel.org/linux-devicetree/b82dec19-02a9-4b93-a2bb-3cbb6f33ae63@ti.com/ (local)

Link to v2:
https://lore.kernel.org/all/20260922165714.425576-1-jm@ti.com/ (local)
---
 arch/arm64/boot/dts/ti/k3-am62p-wakeup.dtsi | 25 +++++++++++++++++++++
 arch/arm64/boot/dts/ti/k3-am62p.dtsi        |  1 +
 2 files changed, 26 insertions(+)
 create mode 100644 arch/arm64/boot/dts/ti/k3-am62p-wakeup.dtsi

diff --git a/arch/arm64/boot/dts/ti/k3-am62p-wakeup.dtsi b/arch/arm64/boot/dts/ti/k3-am62p-wakeup.dtsi
new file mode 100644
index 0000000000000..c56fb3890c983
--- /dev/null
+++ b/arch/arm64/boot/dts/ti/k3-am62p-wakeup.dtsi

@@ -0,0 +1,25 @@
+// SPDX-License-Identifier: GPL-2.0-only OR MIT
+/*
+ * Device Tree file for the AM62P WAKEUP domain peripherals
+ *
+ * Copyright (C) 2026 Texas Instruments Incorporated - https://www.ti.com/
+ */
+
+&wkup_conf {
+	gpsw_efuse: efuse@230 {
+		compatible = "ti,am62p-efuse", "socionext,uniphier-efuse";
+		reg = <0x230 0x10>;
+		#address-cells = <1>;
+		bootph-all;
+		#size-cells = <1>;
+
+		gpsw1: gpsw1@4 {
+			reg = <0x4 0x4>;
+		};
+	};
+};
+
+&chipid {
+	nvmem-cells = <&gpsw1>;
+	nvmem-cell-names = "gpsw1";
+};

diff --git a/arch/arm64/boot/dts/ti/k3-am62p.dtsi b/arch/arm64/boot/dts/ti/k3-am62p.dtsi
index 9d6266d6ddb82..058f264ee0646 100644
--- a/arch/arm64/boot/dts/ti/k3-am62p.dtsi
+++ b/arch/arm64/boot/dts/ti/k3-am62p.dtsi

@@ -154,3 +154,4 @@ cbass_wakeup: bus@b00000 {
 
 /* Include AM62P specific peripherals */
 #include "k3-am62p-main.dtsi"
+#include "k3-am62p-wakeup.dtsi"

-- 
2.34.1