From c7528996a5208ed94eb2e6dc82079542a7869ab3 Mon Sep 17 00:00:00 2001
From: Christian Lamparter <chunkeey@gmail.com>
Date: Sun, 13 Feb 2022 12:46:37 +0100
Subject: [PATCH] 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@gmail.com>
---
.../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 67b93707c79..166342759c4 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@51 {
- compatible = "eeprom";
+ /*
+ * 1Kbit I2C/SMBus EEPROM with SHA-1 Engine
+ * Aerohive calls it "dallas".
+ */
+ compatible = "adi,ds28cn01";
reg = <0x51>;
+ read-only;
};
};
--
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