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arm64: dts: rockchip: Make eeprom read-only for Radxa ROCK 3C/5A/5C

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The BL24C16 EEPROM implemented on the Radxa ROCK 3C, 5A, and 5C [1]
[2] [3] is designed to have data written during factory programming
(regardless of whether data is actually written or not), and we at
Radxa permit users to read the data but not write to it. [4]
Therefore, we will add a read-only property to the eeprom node.

[1] https://dl.radxa.com/rock3/docs/hw/3c/v1400/radxa_rock_3c_v1400_schematic.pdf p.13
[2] https://dl.radxa.com/rock5/5a/docs/hw/radxa_rock5a_V1.1_sch.pdf p.19
[3] https://dl.radxa.com/rock5/5c/docs/hw/v1100/radxa_rock_5c_schematic_v1100.pdf p.18
[4] https://github.com/radxa/u-boot/blob/next-dev-v2024.10/drivers/misc/radxa-i2c-eeprom.c

Signed-off-by: FUKAUMI Naoki <naoki@radxa.com>
Link: https://patch.msgid.link/20260108034252.2713-1-naoki@radxa.com
Signed-off-by: Heiko Stuebner <heiko@sntech.de>
This commit is contained in:
FUKAUMI Naoki 2026-01-08 03:42:52 +00:00 committed by Heiko Stuebner
parent 26cfaee297
commit 4ad1a75480
3 changed files with 3 additions and 0 deletions
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1
arch/arm64/boot/dts/rockchip/rk3566-rock-3c.dts
View File

@ -466,6 +466,7 @@ eeprom: eeprom@50 {
compatible = "belling,bl24c16a", "atmel,24c16";
reg = <0x50>;
pagesize = <16>;
read-only;
vcc-supply = <&vcca1v8_pmu>;
};
};

1
arch/arm64/boot/dts/rockchip/rk3588s-rock-5a.dts
View File

@ -233,6 +233,7 @@ eeprom: eeprom@50 {
compatible = "belling,bl24c16a", "atmel,24c16";
reg = <0x50>;
pagesize = <16>;
read-only;
vcc-supply = <&vcc_3v3_pmu>;
};
};

1
arch/arm64/boot/dts/rockchip/rk3588s-rock-5c.dts
View File

@ -325,6 +325,7 @@ eeprom@50 {
compatible = "belling,bl24c16a", "atmel,24c16";
reg = <0x50>;
pagesize = <16>;
read-only;
vcc-supply = <&vcc_3v3_pmu>;
};
};