From:   Vincent Pelletier <plr.vincent@gmail.com>
To:     Rob Herring <robh+dt@kernel.org>,
        Paul Walmsley <paul.walmsley@sifive.com>,
        Palmer Dabbelt <palmer@dabbelt.com>,
        Albert Ou <aou@eecs.berkeley.edu>,
        Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>,
        Qiu Wenbo <qiuwenbo@kylinos.com.cn>,
        devicetree@vger.kernel.org, linux-riscv@lists.infradead.org,
        linux-kernel@vger.kernel.org,
        David Abdurachmanov <david.abdurachmanov@sifive.com>
Subject: [PATCH v3 2/6] riscv: dts: sifive unmatched: Expose the board ID eeprom
Date:   Fri, 19 Nov 2021 22:55:38 +0000
Message-Id: <589539cd08e35c35b269a769caeac40b85ffd01c.1637362542.git.plr.vincent@gmail.com>
In-Reply-To: <378c64fb868b595430b0068a9af10fdbeceb8e12.1637362542.git.plr.vincent@gmail.com>
References: <378c64fb868b595430b0068a9af10fdbeceb8e12.1637362542.git.plr.vincent@gmail.com>
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Mark it as read-only as it is factory-programmed with identifying
information, and no executable nor configuration:
- eth MAC address
- board model (PCB version, BoM version)
- board serial number
Accidental modification would cause misidentification which could brick
the board, so marking read-only seem like both a safe and non-constraining
choice.

Signed-off-by: Vincent Pelletier <plr.vincent@gmail.com>

---
Changes since v2:
- Fix end-of-commit-message separator so change lists do not end up in them.
Changes since v1:
- Remove trailing "." on subject line.
---
 arch/riscv/boot/dts/sifive/hifive-unmatched-a00.dts | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/arch/riscv/boot/dts/sifive/hifive-unmatched-a00.dts b/arch/riscv/boot/dts/sifive/hifive-unmatched-a00.dts
index 305a086e5207..cf8937708829 100644
--- a/arch/riscv/boot/dts/sifive/hifive-unmatched-a00.dts
+++ b/arch/riscv/boot/dts/sifive/hifive-unmatched-a00.dts
@@ -58,6 +58,16 @@ temperature-sensor@4c {
 		interrupts = <6 IRQ_TYPE_LEVEL_LOW>;
 	};
 
+	eeprom@54 {
+		compatible = "microchip,24c02", "atmel,24c02";
+		reg = <0x54>;
+		vcc-supply = <&vdd_bpro>;
+		label = "board-id";
+		pagesize = <16>;
+		read-only;
+		size = <256>;
+	};
+
 	pmic@58 {
 		compatible = "dlg,da9063";
 		reg = <0x58>;
-- 
2.33.1