linux-kernel - [PATCH v3] arm64: dts: rockchip: add EEPROM node for NanoPi R4S

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Message-Id: <20210620043802.6580-1-cnsztl@gmail.com>
Date:   Sun, 20 Jun 2021 12:38:02 +0800
From:   Tianling Shen <cnsztl@...il.com>
To:     Rob Herring <robh+dt@...nel.org>, Heiko Stuebner <heiko@...ech.de>,
        Tianling Shen <cnsztl@...il.com>,
        Jensen Huang <jensenhuang@...endlyarm.com>,
        Pavel Machek <pavel@....cz>, Marty Jones <mj8263788@...il.com>,
        Chen-Yu Tsai <wens@...e.org>
Cc:     devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-rockchip@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: [PATCH v3] 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.

Changes in v3:
- Added address-cells and size-cells

Changes in v2:
- Added the size of EEPROM
- Added `mac-address` cell to pass the MAC address to kernel
- Removed `read-only` property in EEPROM node

Signed-off-by: Tianling Shen <cnsztl@...il.com>
---
 .../boot/dts/rockchip/rk3399-nanopi-r4s.dts   | 20 +++++++++++++++++++
 1 file changed, 20 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..2813c4a0378d 100644
--- a/arch/arm64/boot/dts/rockchip/rk3399-nanopi-r4s.dts
+++ b/arch/arm64/boot/dts/rockchip/rk3399-nanopi-r4s.dts
@@ -68,6 +68,26 @@
 	status = "disabled";
 };
 
+&gmac {
+	nvmem-cells = <&mac_address>;
+	nvmem-cells-names = "mac-address";
+};
+
+&i2c2 {
+	eeprom@51 {
+		compatible = "microchip,24c02", "atmel,24c02";
+		reg = <0x51>;
+		pagesize = <16>;
+		size = <256>;
+		#address-cells = <1>;
+		#size-cells = <1>;
+
+		mac_address: mac-address@fa {
+			reg = <0xfa 0x06>;
+		};
+	};
+};
+
 &i2c4 {
 	status = "disabled";
 };
-- 
2.17.1