Subject: [PATCH v2 3/3] arm64: dts: allwinner: A133: add support for Baijie Helper A133 board

From: Alexander Sverdlin <[email-masked]>
Date: Sun, 10 May 2026 22:16:40 +0200

Baijie Helper A133 board is a development board around Baijie A133 Core
SBC. Features:

- 1/2/4GiB LPDDR4 DRAM
- 8/16/32GiB eMMC
- AXP707 PMIC
- 2 USB 2.0 ports
- MicroSD slot and on-board eMMC module
- Gigabit Ethernet
- Bluetooth
- WiFi

Add initial support for both the Helper and Core boards, including UART,
PMU, eMMC, USB, Ethernet.

Signed-off-by: Alexander Sverdlin <[email-masked]>
---

Changelog:
v2:
- introduced baijie,helper-a133-core compatible for the Core (SoM) board

 arch/arm64/boot/dts/allwinner/Makefile        |   1 +
 .../dts/allwinner/sun50i-a133-baije-core.dtsi | 162 ++++++++++++++++++
 .../allwinner/sun50i-a133-baijie-helper.dts   |  94 ++++++++++
 3 files changed, 257 insertions(+)
 create mode 100644 arch/arm64/boot/dts/allwinner/sun50i-a133-baije-core.dtsi
 create mode 100644 arch/arm64/boot/dts/allwinner/sun50i-a133-baijie-helper.dts

diff --git a/arch/arm64/boot/dts/allwinner/Makefile b/arch/arm64/boot/dts/allwinner/Makefile
index d116864b6c2b..926dfa851100 100644
--- a/arch/arm64/boot/dts/allwinner/Makefile
+++ b/arch/arm64/boot/dts/allwinner/Makefile
@@ -18,6 +18,7 @@ dtb-$(CONFIG_ARCH_SUNXI) += sun50i-a64-sopine-baseboard.dtb
 dtb-$(CONFIG_ARCH_SUNXI) += sun50i-a64-teres-i.dtb
 dtb-$(CONFIG_ARCH_SUNXI) += sun50i-h64-remix-mini-pc.dtb
 dtb-$(CONFIG_ARCH_SUNXI) += sun50i-a100-allwinner-perf1.dtb
+dtb-$(CONFIG_ARCH_SUNXI) += sun50i-a133-baijie-helper.dtb
 dtb-$(CONFIG_ARCH_SUNXI) += sun50i-a133-liontron-h-a133l.dtb
 dtb-$(CONFIG_ARCH_SUNXI) += sun50i-h5-bananapi-m2-plus.dtb
 dtb-$(CONFIG_ARCH_SUNXI) += sun50i-h5-bananapi-m2-plus-v1.2.dtb
diff --git a/arch/arm64/boot/dts/allwinner/sun50i-a133-baije-core.dtsi b/arch/arm64/boot/dts/allwinner/sun50i-a133-baije-core.dtsi
new file mode 100644
index 000000000000..65b094f30bf5
--- /dev/null
+++ b/arch/arm64/boot/dts/allwinner/sun50i-a133-baije-core.dtsi
@@ -0,0 +1,162 @@
+// SPDX-License-Identifier: (GPL-2.0+ OR MIT)
+/*
+ * Copyright (c) 2025 Arm Ltd.
+ */
+
+/dts-v1/;
+
+#include "sun50i-a100.dtsi"
+#include "sun50i-a100-cpu-opp.dtsi"
+
+/{
+	compatible = "baijie,helper-a133-core",
+		     "allwinner,sun50i-a100";
+
+	aliases {
+		serial1 = &uart1;	/* BT module */
+	};
+};
+
+&cpu0 {
+	cpu-supply = <&reg_dcdc2>;
+};
+
+&pio {
+	vcc-pb-supply = <&reg_dcdc1>;
+	vcc-pc-supply = <&reg_eldo1>;
+	vcc-pd-supply = <&reg_dcdc1>;
+	vcc-pe-supply = <&reg_dldo2>;
+	vcc-pf-supply = <&reg_dcdc1>;
+	vcc-pg-supply = <&reg_dldo1>;
+	vcc-ph-supply = <&reg_dcdc1>;
+};
+
+&mmc2 {
+	vmmc-supply = <&reg_dcdc1>;
+	vqmmc-supply = <&reg_eldo1>;
+	cap-mmc-hw-reset;
+	non-removable;
+	bus-width = <8>;
+	mmc-ddr-1_8v;
+	mmc-hs200-1_8v;
+	status = "okay";
+};
+
+&r_i2c0 {
+	status = "okay";
+
+	axp803: pmic@34 {
+		compatible = "x-powers,axp803";
+		reg = <0x34>;
+		interrupt-parent = <&r_intc>;
+		interrupts = <0 IRQ_TYPE_LEVEL_LOW>;
+	};
+};
+
+#include "axp803.dtsi"
+
+&ac_power_supply {
+	status = "okay";
+};
+
+&reg_aldo1 {
+	regulator-always-on;
+	regulator-min-microvolt = <700000>;
+	regulator-max-microvolt = <3300000>;
+};
+
+&reg_aldo2 {
+	regulator-always-on;
+	regulator-min-microvolt = <700000>;
+	regulator-max-microvolt = <3300000>;
+};
+
+&reg_aldo3 {
+	regulator-always-on;
+	regulator-min-microvolt = <700000>;
+	regulator-max-microvolt = <3300000>;
+	regulator-enable-ramp-delay = <1000>;
+};
+
+&reg_dcdc1 {
+	regulator-always-on;
+	regulator-min-microvolt = <1600000>;
+	regulator-max-microvolt = <3400000>;
+	regulator-name = "vcc-3v3";
+};
+
+&reg_dcdc2 {
+	regulator-always-on;
+	regulator-min-microvolt = <500000>;
+	regulator-max-microvolt = <1300000>;
+	regulator-name = "vdd-cpu";
+};
+
+&reg_dcdc3 {
+	regulator-always-on;
+	regulator-min-microvolt = <500000>;
+	regulator-max-microvolt = <1300000>;
+};
+
+&reg_dcdc4 {
+	regulator-always-on;
+	regulator-min-microvolt = <500000>;
+	regulator-max-microvolt = <1300000>;
+	regulator-name = "vdd-sys";
+};
+
+&reg_dcdc5 {
+	regulator-always-on;
+	regulator-min-microvolt = <800000>;
+	regulator-max-microvolt = <1840000>;
+	regulator-name = "vcc-dram";
+};
+
+/* DCDC6 unused */
+
+&reg_dldo1 {
+	regulator-min-microvolt = <700000>;
+	regulator-max-microvolt = <3300000>;
+	regulator-enable-ramp-delay = <1000>;
+};
+
+&reg_dldo2 {
+	regulator-min-microvolt = <700000>;
+	regulator-max-microvolt = <3400000>;
+	regulator-enable-ramp-delay = <1000>;
+};
+
+&reg_dldo3 {
+	regulator-min-microvolt = <700000>;
+	regulator-max-microvolt = <3300000>;
+	regulator-enable-ramp-delay = <1000>;
+	regulator-name = "avdd-csi";
+};
+
+&reg_dldo4 {
+	regulator-min-microvolt = <700000>;
+	regulator-max-microvolt = <3300000>;
+	regulator-enable-ramp-delay = <1000>;
+};
+
+&reg_eldo1 {
+	regulator-min-microvolt = <700000>;
+	regulator-max-microvolt = <1900000>;
+	regulator-enable-ramp-delay = <1000>;
+};
+
+&reg_eldo2 {
+	regulator-min-microvolt = <700000>;
+	regulator-max-microvolt = <1900000>;
+	regulator-enable-ramp-delay = <1000>;
+	regulator-name = "dvdd-csi";
+};
+
+/* ELDO3 unused */
+
+&reg_fldo1 {
+	regulator-always-on;
+	regulator-min-microvolt = <700000>;
+	regulator-max-microvolt = <1450000>;
+	regulator-name = "vdd-cpus-usb";
+};
diff --git a/arch/arm64/boot/dts/allwinner/sun50i-a133-baijie-helper.dts b/arch/arm64/boot/dts/allwinner/sun50i-a133-baijie-helper.dts
new file mode 100644
index 000000000000..ccbca5d0a40c
--- /dev/null
+++ b/arch/arm64/boot/dts/allwinner/sun50i-a133-baijie-helper.dts
@@ -0,0 +1,94 @@
+// SPDX-License-Identifier: (GPL-2.0+ OR MIT)
+/*
+ * Copyright (c) 2025 Arm Ltd.
+ */
+
+/dts-v1/;
+
+#include "sun50i-a133-baije-core.dtsi"
+
+#include <dt-bindings/gpio/gpio.h>
+#include <dt-bindings/leds/common.h>
+
+/{
+	model = "HelperBoard A133";
+	compatible = "baijie,helper-a133",
+		     "baijie,helper-a133-core",
+		     "allwinner,sun50i-a100";
+
+	aliases {
+		serial0 = &uart0;
+	};
+
+	chosen {
+		stdout-path = "serial0:115200n8";
+	};
+
+	leds {
+		compatible = "gpio-leds";
+
+		led {
+			function = LED_FUNCTION_INDICATOR;
+			color = <LED_COLOR_ID_GREEN>;
+			gpios = <&pio 7 13 GPIO_ACTIVE_LOW>;	/* PH13 */
+		};
+	};
+};
+
+&mmc0 {
+	vmmc-supply = <&reg_dcdc1>;
+	cd-gpios = <&pio 5 6 GPIO_ACTIVE_LOW>;	/* PF6 */
+	bus-width = <4>;
+	status = "okay";
+};
+
+&uart0 {
+	pinctrl-names = "default";
+	pinctrl-0 = <&uart0_pb_pins>;
+	status = "okay";
+};
+
+&rgmii0_pins {
+	drive-strength = <30>;
+};
+
+&emac0 {
+	pinctrl-names = "default";
+	pinctrl-0 = <&rgmii0_pins>;
+	phy-handle = <&eth_phy>;
+	phy-mode = "rgmii-id";
+	allwinner,rx-delay-ps = <200>;
+	allwinner,tx-delay-ps = <200>;
+	status = "okay";
+};
+
+&mdio0 {
+	reset-gpios = <&pio 7 11 GPIO_ACTIVE_LOW>;	/* PH11 */
+	reset-delay-us = <10000>;
+	reset-post-delay-us = <150000>;
+
+	eth_phy: ethernet-phy@1 {
+		compatible = "ethernet-phy-ieee802.3-c22";
+		reg = <1>;
+	};
+};
+
+&usbphy {
+	status = "okay";
+};
+
+&ehci0 {
+	status = "okay";
+};
+
+&ohci0 {
+	status = "okay";
+};
+
+&ehci1 {
+	status = "okay";
+};
+
+&ohci1 {
+	status = "okay";
+};
-- 
2.54.0