linux-kernel - [PATCH] arm64: dts: broadcom: ns2-svk: fix AT25 EEPROM node and properties

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Message-Id: <20260122161823.105404-1-jun85566@gmail.com>
Date: Fri, 23 Jan 2026 01:18:23 +0900
From: Lee Yongjun <jun85566@...il.com>
To: rjui@...adcom.com,
	sbranden@...adcom.com,
	robh@...nel.org,
	krzk+dt@...nel.org,
	conor+dt@...nel.org
Cc: bcm-kernel-feedback-list@...adcom.com,
	linux-arm-kernel@...ts.infradead.org,
	devicetree@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	Lee Yongjun <jun85566@...il.com>
Subject: [PATCH] arm64: dts: broadcom: ns2-svk: fix AT25 EEPROM node and properties

The AT25 EEPROM node on the Northstar 2 SVK board used legacy vendor
properties and a non-standard node name, which triggers dtbs_check
warnings.

Update the node to follow the dt-schema by:
- Renaming the node from at25@0 to eeprom@0.
- Replacing deprecated "at25,byte-len" with "size".
- Replacing deprecated "at25,page-size" with "pagesize".
- Replacing deprecated "at25,addr-mode" with "address-width".

For "address-width", the legacy value <2> corresponds to the EE_ADDR2
flag in the driver (include/linux/spi/eeprom.h), which is explicitly
defined as 16-bit addressing. Therefore, <16> is the technically
accurate value that preserves the existing hardware behavior while
satisfying the at25.yaml schema requirements.

Signed-off-by: Lee Yongjun <jun85566@...il.com>
---
 arch/arm64/boot/dts/broadcom/northstar2/ns2-svk.dts | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/arch/arm64/boot/dts/broadcom/northstar2/ns2-svk.dts b/arch/arm64/boot/dts/broadcom/northstar2/ns2-svk.dts
index 5939d342aec7..c4412c6b4cef 100644
--- a/arch/arm64/boot/dts/broadcom/northstar2/ns2-svk.dts
+++ b/arch/arm64/boot/dts/broadcom/northstar2/ns2-svk.dts
@@ -127,13 +127,13 @@ slic@0 {
 &ssp1 {
 	status = "okay";
 
-	at25@0 {
+	eeprom@0 {
 		compatible = "atmel,at25";
 		reg = <0>;
 		spi-max-frequency = <5000000>;
-		at25,byte-len = <0x8000>;
-		at25,addr-mode = <2>;
-		at25,page-size = <64>;
+		size = <0x8000>;
+		address-width = <16>;
+		pagesize = <64>;
 		spi-cpha;
 		spi-cpol;
 		pl022,interface = <0>;
-- 
2.34.1