From: FUKAUMI Naoki <naoki@radxa.com>
Date: Tue, 2 Dec 2025 08:49:41 +0000 (+0000)
Subject: arm64: dts: rockchip: Add EEPROMs for Radxa rk35xx boards
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=e3b12fc3336240e7dee4989b9e8634be3c959c94;p=thirdparty%2Fkernel%2Flinux.git

arm64: dts: rockchip: Add EEPROMs for Radxa rk35xx boards

The BL24C16A EEPROM is found in the schematics for Radxa CM3I, Radxa
ROCK 3A, 3B, 5B+, and 5T. [1] [2] [3] [4] [5]

The BL24C16F EEPROM is found in the schematic for Radxa ROCK 4D. [6]

Add these eeprom nodes.

These are designed to have data written during factory programming
(regardless of whether data is actually written or not), and we at
Radxa permit users to read the data but not write to it. [8]
Therefore, we will add a read-only property to the eeprom node.

[1] https://dl.radxa.com/cm3i/docs/hw/radxa_cm3i_v1310_schematic.pdf p.8
[2] https://dl.radxa.com/rock3/docs/hw/3a/radxa_rock_3a_v1310_schematic.pdf p.7
[3] https://dl.radxa.com/rock3/docs/hw/3b/Radxa_ROCK_3B_V1.51_SCH.pdf p.35
[4] https://dl.radxa.com/rock5/5b+/docs/hw/radxa_rock5bp_v1.2_schematic.pdf p.29
[5] https://dl.radxa.com/rock5/5t/docs/hw/radxa_rock5t_schematic_v1.2_20250109.pdf p.36
[6] https://dl.radxa.com/rock4/4d/docs/hw/Radxa_ROCK_4D_SCH_V1.12.pdf p.23
[7] https://github.com/radxa/u-boot/blob/next-dev-v2024.10/drivers/misc/radxa-i2c-eeprom.c

Signed-off-by: FUKAUMI Naoki <naoki@radxa.com>
Link: https://patch.msgid.link/20251202084941.1785-4-naoki@radxa.com
Signed-off-by: Heiko Stuebner <heiko@sntech.de>
---

diff --git a/arch/arm64/boot/dts/rockchip/rk3568-radxa-cm3i.dtsi b/arch/arm64/boot/dts/rockchip/rk3568-radxa-cm3i.dtsi
index 729e38b9f620e..f97a0eb7f7c08 100644
--- a/arch/arm64/boot/dts/rockchip/rk3568-radxa-cm3i.dtsi
+++ b/arch/arm64/boot/dts/rockchip/rk3568-radxa-cm3i.dtsi
@@ -321,7 +321,7 @@
 				};
 			};
 
-			vcc_3v3: SWITCH_REG1 {
+			gpio_vref: vcc_3v3: SWITCH_REG1 {
 				regulator-name = "vcc_3v3";
 				regulator-always-on;
 				regulator-boot-on;
@@ -340,6 +340,14 @@
 			};
 		};
 	};
+
+	eeprom@50 {
+		compatible = "belling,bl24c16a", "atmel,24c16";
+		reg = <0x50>;
+		pagesize = <16>;
+		read-only;
+		vcc-supply = <&gpio_vref>;
+	};
 };
 
 &pinctrl {
diff --git a/arch/arm64/boot/dts/rockchip/rk3568-rock-3a.dts b/arch/arm64/boot/dts/rockchip/rk3568-rock-3a.dts
index 44cfdfeed6681..9214e38648f25 100644
--- a/arch/arm64/boot/dts/rockchip/rk3568-rock-3a.dts
+++ b/arch/arm64/boot/dts/rockchip/rk3568-rock-3a.dts
@@ -532,6 +532,14 @@
 			};
 		};
 	};
+
+	eeprom@50 {
+		compatible = "belling,bl24c16a", "atmel,24c16";
+		reg = <0x50>;
+		pagesize = <16>;
+		read-only;
+		vcc-supply = <&vcc3v3_pmu>;
+	};
 };
 
 &i2c3 {
diff --git a/arch/arm64/boot/dts/rockchip/rk3568-rock-3b.dts b/arch/arm64/boot/dts/rockchip/rk3568-rock-3b.dts
index 3d0c1ccfaa796..69001e453732e 100644
--- a/arch/arm64/boot/dts/rockchip/rk3568-rock-3b.dts
+++ b/arch/arm64/boot/dts/rockchip/rk3568-rock-3b.dts
@@ -480,6 +480,14 @@
 			};
 		};
 	};
+
+	eeprom@50 {
+		compatible = "belling,bl24c16a", "atmel,24c16";
+		reg = <0x50>;
+		pagesize = <16>;
+		read-only;
+		vcc-supply = <&vcc3v3_sys>;
+	};
 };
 
 &i2c5 {
diff --git a/arch/arm64/boot/dts/rockchip/rk3576-rock-4d.dts b/arch/arm64/boot/dts/rockchip/rk3576-rock-4d.dts
index 7023dc326d0e8..899a84b1fbf9e 100644
--- a/arch/arm64/boot/dts/rockchip/rk3576-rock-4d.dts
+++ b/arch/arm64/boot/dts/rockchip/rk3576-rock-4d.dts
@@ -682,6 +682,20 @@
 	};
 };
 
+&i2c6 {
+	pinctrl-names = "default";
+	pinctrl-0 = <&i2c6m3_xfer>;
+	status = "okay";
+
+	eeprom@50 {
+		compatible = "belling,bl24c16f", "atmel,24c16";
+		reg = <0x50>;
+		pagesize = <16>;
+		read-only;
+		vcc-supply = <&vcc_3v3_s3>;
+	};
+};
+
 &mdio0 {
 	rgmii_phy0: ethernet-phy@1 {
 		compatible = "ethernet-phy-id001c.c916";
diff --git a/arch/arm64/boot/dts/rockchip/rk3588-rock-5b-plus.dts b/arch/arm64/boot/dts/rockchip/rk3588-rock-5b-plus.dts
index 07a840d9b3859..30d15c7e860a3 100644
--- a/arch/arm64/boot/dts/rockchip/rk3588-rock-5b-plus.dts
+++ b/arch/arm64/boot/dts/rockchip/rk3588-rock-5b-plus.dts
@@ -69,6 +69,16 @@
 	};
 };
 
+&i2c1 {
+	eeprom@50 {
+		compatible = "belling,bl24c16a", "atmel,24c16";
+		reg = <0x50>;
+		pagesize = <16>;
+		read-only;
+		vcc-supply = <&vcc_3v3_s3>;
+	};
+};
+
 &pcie30phy {
 	data-lanes = <1 1 2 2>;
 };
diff --git a/arch/arm64/boot/dts/rockchip/rk3588-rock-5t.dts b/arch/arm64/boot/dts/rockchip/rk3588-rock-5t.dts
index 0dd90c744380b..425036146b6d9 100644
--- a/arch/arm64/boot/dts/rockchip/rk3588-rock-5t.dts
+++ b/arch/arm64/boot/dts/rockchip/rk3588-rock-5t.dts
@@ -60,6 +60,16 @@
 	status = "okay";
 };
 
+&i2c1 {
+	eeprom@50 {
+		compatible = "belling,bl24c16a", "atmel,24c16";
+		reg = <0x50>;
+		pagesize = <16>;
+		read-only;
+		vcc-supply = <&vcc_3v3_s3>;
+	};
+};
+
 &pcie2x1l1 {
 	pinctrl-names = "default";
 	pinctrl-0 = <&pcie2_1_rst>;