linux-kernel - [PATCH] arm64: dts: rockchip: add EEPROM node for NanoPi R4S

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Message-Id: <20210607081727.4723-1-cnsztl@gmail.com>
Date:   Mon,  7 Jun 2021 16:17:27 +0800
From:   Tianling Shen <cnsztl@...il.com>
To:     Rob Herring <robh+dt@...nel.org>, Heiko Stuebner <heiko@...ech.de>,
        Tianling Shen <cnsztl@...il.com>,
        Marty Jones <mj8263788@...il.com>, Pavel Machek <pavel@....cz>
Cc:     devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-rockchip@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: [PATCH] arm64: dts: rockchip: add EEPROM node for NanoPi R4S

NanoPi R4S has a EEPROM attached to the 2nd I2C bus (U92), which
stores the MAC address.

Signed-off-by: Tianling Shen <cnsztl@...il.com>
---
 arch/arm64/boot/dts/rockchip/rk3399-nanopi-r4s.dts | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/arch/arm64/boot/dts/rockchip/rk3399-nanopi-r4s.dts b/arch/arm64/boot/dts/rockchip/rk3399-nanopi-r4s.dts
index cef4d18b599d..4a82f50a07c5 100644
--- a/arch/arm64/boot/dts/rockchip/rk3399-nanopi-r4s.dts
+++ b/arch/arm64/boot/dts/rockchip/rk3399-nanopi-r4s.dts
@@ -68,6 +68,15 @@
 	status = "disabled";
 };
 
+&i2c2 {
+	eeprom@51 {
+		compatible = "microchip,24c02", "atmel,24c02";
+		reg = <0x51>;
+		pagesize = <16>;
+		read-only; /* This holds our MAC */
+	};
+};
+
 &i2c4 {
 	status = "disabled";
 };
-- 
2.17.1