[openwrt/openwrt] mpc85xx: change legacy "eeprom" compatible

[LEDE Commits]

chunkeey pushed a commit to openwrt/openwrt.git, branch master:
https://git.openwrt.org/c7528996a5208ed94eb2e6dc82079542a7869ab3

commit c7528996a5208ed94eb2e6dc82079542a7869ab3
Author: Christian Lamparter <chunkeey at gmail.com>
AuthorDate: Sun Feb 13 12:46:37 2022 +0100

    mpc85xx: change legacy "eeprom" compatible
    
    silences the following message:
    > eeprom 0-0051: eeprom driver is deprecated, please use at24 instead
    
    The chip was likely a Dallas Semiconductor and later MAXIM part
    before Analog Devices, Inc. bought MAXIM.
    
    From the datasheet:
    
    "The DS28CN01 combines 1024 bits of EEPROM with challenge-and-response
    authentication security implemented with the FIPS 180-1/180-2 and
    ISO/IEC 10118-3 Secure Hash Algorithm (SHA-1)."
    
    ...
    
    "Write Access Requires Knowledge of the Secret
    and the Capability of Computing and Transmitting
    a 160-Bit MAC as Authorization"
    
    OpenWrt doesn't use it. There's no in-kernel driver
    from what I know. Let's document that the chip is
    at the location.
    
    Signed-off-by: Christian Lamparter <chunkeey at gmail.com>
---
 target/linux/mpc85xx/files/arch/powerpc/boot/dts/hiveap-330.dts | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/target/linux/mpc85xx/files/arch/powerpc/boot/dts/hiveap-330.dts b/target/linux/mpc85xx/files/arch/powerpc/boot/dts/hiveap-330.dts
index 67b93707c7..166342759c 100644
--- a/target/linux/mpc85xx/files/arch/powerpc/boot/dts/hiveap-330.dts
+++ b/target/linux/mpc85xx/files/arch/powerpc/boot/dts/hiveap-330.dts
@@ -183,10 +183,14 @@
 #endif
 			};
 
-			/* Most likely SoC boot config */
 			eeprom at 51 {
-				compatible = "eeprom";
+				/*
+				 * 1Kbit I2C/SMBus EEPROM with SHA-1 Engine
+				 * Aerohive calls it "dallas".
+				 */
+				compatible = "adi,ds28cn01";
 				reg = <0x51>;
+				read-only;
 			};
 		};