* [PATCH] arm64: dts: rockchip: rk3399-nanopi-r4s-enterprise: Fix EEPROM compatible
@ 2026-05-05 16:52 ` Chen-Yu Tsai
0 siblings, 0 replies; 4+ messages in thread
From: Chen-Yu Tsai @ 2026-05-05 16:52 UTC (permalink / raw)
To: Heiko Stuebner; +Cc: Chen-Yu Tsai, linux-rockchip, devicetree
The EEPROM used on the R4S (enterprise) is the 24AA025E48T-I/OT from
MicroChip. This is a 2-Kbit EEPROM with 16-byte page size. The latter
half of the EEPROM is read-only, and the last 48 bits contain a globally
unique MAC address. That is to say this is not an ordinary EEPROM.
The compatible for this type of EEPROM was introduced later that the
board. Switch over to the correct compatible now that it is available.
Signed-off-by: Chen-Yu Tsai <wens@kernel.org>
---
This should probably not be backported without the matching changes
to the DT binding and the at24 driver.
arch/arm64/boot/dts/rockchip/rk3399-nanopi-r4s-enterprise.dts | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch/arm64/boot/dts/rockchip/rk3399-nanopi-r4s-enterprise.dts b/arch/arm64/boot/dts/rockchip/rk3399-nanopi-r4s-enterprise.dts
index b76f98962076..e366f1a04b32 100644
--- a/arch/arm64/boot/dts/rockchip/rk3399-nanopi-r4s-enterprise.dts
+++ b/arch/arm64/boot/dts/rockchip/rk3399-nanopi-r4s-enterprise.dts
@@ -16,7 +16,7 @@ &gmac {
&i2c2 {
eeprom@51 {
- compatible = "microchip,24c02", "atmel,24c02";
+ compatible = "microchip,24aa025e48";
reg = <0x51>;
pagesize = <16>;
size = <256>;
--
2.47.3
^ permalink raw reply related [flat|nested] 4+ messages in thread* [PATCH] arm64: dts: rockchip: rk3399-nanopi-r4s-enterprise: Fix EEPROM compatible
@ 2026-05-05 16:52 ` Chen-Yu Tsai
0 siblings, 0 replies; 4+ messages in thread
From: Chen-Yu Tsai @ 2026-05-05 16:52 UTC (permalink / raw)
To: Heiko Stuebner; +Cc: Chen-Yu Tsai, linux-rockchip, devicetree
The EEPROM used on the R4S (enterprise) is the 24AA025E48T-I/OT from
MicroChip. This is a 2-Kbit EEPROM with 16-byte page size. The latter
half of the EEPROM is read-only, and the last 48 bits contain a globally
unique MAC address. That is to say this is not an ordinary EEPROM.
The compatible for this type of EEPROM was introduced later that the
board. Switch over to the correct compatible now that it is available.
Signed-off-by: Chen-Yu Tsai <wens@kernel.org>
---
This should probably not be backported without the matching changes
to the DT binding and the at24 driver.
arch/arm64/boot/dts/rockchip/rk3399-nanopi-r4s-enterprise.dts | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch/arm64/boot/dts/rockchip/rk3399-nanopi-r4s-enterprise.dts b/arch/arm64/boot/dts/rockchip/rk3399-nanopi-r4s-enterprise.dts
index b76f98962076..e366f1a04b32 100644
--- a/arch/arm64/boot/dts/rockchip/rk3399-nanopi-r4s-enterprise.dts
+++ b/arch/arm64/boot/dts/rockchip/rk3399-nanopi-r4s-enterprise.dts
@@ -16,7 +16,7 @@ &gmac {
&i2c2 {
eeprom@51 {
- compatible = "microchip,24c02", "atmel,24c02";
+ compatible = "microchip,24aa025e48";
reg = <0x51>;
pagesize = <16>;
size = <256>;
--
2.47.3
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^ permalink raw reply related [flat|nested] 4+ messages in thread* Re: [PATCH] arm64: dts: rockchip: rk3399-nanopi-r4s-enterprise: Fix EEPROM compatible
2026-05-05 16:52 ` Chen-Yu Tsai
@ 2026-06-01 10:20 ` Heiko Stuebner
-1 siblings, 0 replies; 4+ messages in thread
From: Heiko Stuebner @ 2026-06-01 10:20 UTC (permalink / raw)
To: Chen-Yu Tsai; +Cc: Heiko Stuebner, linux-rockchip, devicetree
On Wed, 06 May 2026 00:52:43 +0800, Chen-Yu Tsai wrote:
> The EEPROM used on the R4S (enterprise) is the 24AA025E48T-I/OT from
> MicroChip. This is a 2-Kbit EEPROM with 16-byte page size. The latter
> half of the EEPROM is read-only, and the last 48 bits contain a globally
> unique MAC address. That is to say this is not an ordinary EEPROM.
>
> The compatible for this type of EEPROM was introduced later that the
> board. Switch over to the correct compatible now that it is available.
>
> [...]
Applied, thanks!
[1/1] arm64: dts: rockchip: rk3399-nanopi-r4s-enterprise: Fix EEPROM compatible
commit: ab1375e25ea3fef62a4a5a93abf5d03d67aaf99c
Best regards,
--
Heiko Stuebner <heiko@sntech.de>
_______________________________________________
Linux-rockchip mailing list
Linux-rockchip@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-rockchip
^ permalink raw reply [flat|nested] 4+ messages in thread* Re: [PATCH] arm64: dts: rockchip: rk3399-nanopi-r4s-enterprise: Fix EEPROM compatible
@ 2026-06-01 10:20 ` Heiko Stuebner
0 siblings, 0 replies; 4+ messages in thread
From: Heiko Stuebner @ 2026-06-01 10:20 UTC (permalink / raw)
To: Chen-Yu Tsai; +Cc: Heiko Stuebner, linux-rockchip, devicetree
On Wed, 06 May 2026 00:52:43 +0800, Chen-Yu Tsai wrote:
> The EEPROM used on the R4S (enterprise) is the 24AA025E48T-I/OT from
> MicroChip. This is a 2-Kbit EEPROM with 16-byte page size. The latter
> half of the EEPROM is read-only, and the last 48 bits contain a globally
> unique MAC address. That is to say this is not an ordinary EEPROM.
>
> The compatible for this type of EEPROM was introduced later that the
> board. Switch over to the correct compatible now that it is available.
>
> [...]
Applied, thanks!
[1/1] arm64: dts: rockchip: rk3399-nanopi-r4s-enterprise: Fix EEPROM compatible
commit: ab1375e25ea3fef62a4a5a93abf5d03d67aaf99c
Best regards,
--
Heiko Stuebner <heiko@sntech.de>
^ permalink raw reply [flat|nested] 4+ messages in thread
end of thread, other threads:[~2026-06-01 10:20 UTC | newest]
Thread overview: 4+ messages (download: mbox.gz follow: Atom feed
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2026-05-05 16:52 [PATCH] arm64: dts: rockchip: rk3399-nanopi-r4s-enterprise: Fix EEPROM compatible Chen-Yu Tsai
2026-05-05 16:52 ` Chen-Yu Tsai
2026-06-01 10:20 ` Heiko Stuebner
2026-06-01 10:20 ` Heiko Stuebner
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