[PATCH v2 0/3] arm64: dts: amlogic: add support for Orbbec Zora P1

[PATCH v2 0/3] arm64: dts: amlogic: add support for Orbbec Zora P1

[Alberto Robazza]

The Orbbec Zora P1 is a vision development board based on the Amlogic
A311D (Meson G12B) SoC, with 2 or 4 GiB LPDDR4, an Ampak AP6256 combo
module (Broadcom BCM43456 Wi-Fi over SDIO and BCM4345C5 Bluetooth over
UART_A), HDMI output and Gigabit Ethernet.

According to its specifications and original device tree, the board is
a revised version of the ODROID-N2 with Wi-Fi, Bluetooth and an Amlogic
A311D instead of the original S922X. The device tree therefore builds on
meson-g12b-a311d.dtsi and meson-g12b-odroid-n2.dtsi, mirroring
meson-g12b-odroid-n2-plus.dts. It extends those descriptions with the
board-specific AP6256 wiring. The status LED is green instead of the
original ODROID-N2 blue and has inverted polarity.

This series consists of:
  Patch 1: add the "orbbec" vendor prefix.
  Patch 2: document the "orbbec,zora-p1" board compatible.
  Patch 3: add the meson-g12b-zora-p1.dts board file and Makefile entry.

The DTB was built, validated against the amlogic.yaml binding using
DT_SCHEMA_FILES, and boot-tested twice on the board. The AP6256 Wi-Fi
interface enumerates and operates with the GPIOX_16 reset and PWM clock
description present. Removing the wifi32k and pwm_ef descriptions causes
the SDIO Wi-Fi device to stop working on this board.

---
Changes in v2:
- Investigated the apparent GPIOX_16 overlap between the SDIO power
  sequence reset and the 32.768 kHz PWM clock. Retained the description
  after two successful hardware tests; removing the clock description
  prevents the AP6256 Wi-Fi device from working.
- Sort the new DTB entry alphabetically in the Amlogic Makefile.
- Sort the "orbbec" entry alphabetically in vendor-prefixes.yaml.

Alberto Robazza (3):
  dt-bindings: vendor-prefixes: add Orbbec
  dt-bindings: arm: amlogic: document Orbbec Zora P1 board compatible
  arm64: dts: amlogic: add support for Orbbec Zora P1

 .../devicetree/bindings/arm/amlogic.yaml      |   1 +
 .../devicetree/bindings/vendor-prefixes.yaml  |   2 +
 arch/arm64/boot/dts/amlogic/Makefile          |   1 +
 .../boot/dts/amlogic/meson-g12b-zora-p1.dts   | 103 ++++++++++++++++++
 4 files changed, 107 insertions(+)
 create mode 100644 arch/arm64/boot/dts/amlogic/meson-g12b-zora-p1.dts

-- 
2.55.0

[PATCH v2 1/3] dt-bindings: vendor-prefixes: add Orbbec

[Alberto Robazza]

Add the "orbbec" vendor prefix for Orbbec Inc., a manufacturer of
3D depth cameras and embedded vision boards. The prefix is needed by
an upcoming board compatible string ("orbbec,zora-p1") introduced by
this series.

Link: https://www.orbbec.com/
Signed-off-by: Alberto Robazza <robazzalberto@gmail.com>
---
 Documentation/devicetree/bindings/vendor-prefixes.yaml | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/Documentation/devicetree/bindings/vendor-prefixes.yaml b/Documentation/devicetree/bindings/vendor-prefixes.yaml
index 396044f36..a42899bd2 100644
--- a/Documentation/devicetree/bindings/vendor-prefixes.yaml
+++ b/Documentation/devicetree/bindings/vendor-prefixes.yaml
@@ -1251,6 +1251,8 @@ patternProperties:
     description: Option NV
   "^oranth,.*":
     description: Shenzhen Oranth Technology Co., Ltd.
+  "^orbbec,.*":
+    description: Orbbec Inc.
   "^ORCL,.*":
     description: Oracle Corporation
   "^orisetech,.*":
-- 
2.55.0

[PATCH v2 2/3] dt-bindings: arm: amlogic: document Orbbec Zora P1 board compatible

[Alberto Robazza]

Document the "orbbec,zora-p1" compatible for the Orbbec Zora P1 board,
which is based on the Amlogic A311D (Meson G12B) SoC. The corresponding
device tree is added in the follow-up patch.

The "orbbec" vendor prefix used here is added in the first patch of this
series

Signed-off-by: Alberto Robazza <robazzalberto@gmail.com>
---
 Documentation/devicetree/bindings/arm/amlogic.yaml | 1 +
 1 file changed, 1 insertion(+)

diff --git a/Documentation/devicetree/bindings/arm/amlogic.yaml b/Documentation/devicetree/bindings/arm/amlogic.yaml
index 9f73a0054..2d6ecdada 100644
--- a/Documentation/devicetree/bindings/arm/amlogic.yaml
+++ b/Documentation/devicetree/bindings/arm/amlogic.yaml
@@ -167,6 +167,7 @@ properties:
               - bananapi,bpi-m2s
               - khadas,vim3
               - libretech,aml-a311d-cc
+              - orbbec,zora-p1
               - radxa,zero2
           - const: amlogic,a311d
           - const: amlogic,g12b
-- 
2.55.0

[PATCH v2 3/3] arm64: dts: amlogic: add support for Orbbec Zora P1

[Alberto Robazza]

The Orbbec Zora P1 is an A311D (Meson G12B) board with 2/4 GiB DDR4,
an Ampak AP6256 combo module (Broadcom BCM43456 Wi-Fi over SDIO and
BCM4345C5 Bluetooth over UART_A), HDMI audio output.

According to the original Linux dts, the board is a modded version
of the ODROID-N2, with Amlogic A311D instead of the original S922X
and WiFi and Bluetooth support.
So the device tree builds on meson-g12b-a311d.dtsi and
meson-g12b-odroid-n2.dtsi (using same vddcpu values of N2+),
extended with the board-specific GPIO wiring for the AP6256 handling,
and some modifications for the led, GPIO_ACTIVE_LOW instead of
GPIO_ACTIVE_HIGH and different label (it is a green led, not blue as
in the Odroid N2).

Add the "orbbec,zora-p1" compatible to the amlogic.yaml board binding
(the "orbbec" vendor prefix is already registered) and the new DTB to
the Makefile.

Signed-off-by: Alberto Robazza <robazzalberto@gmail.com>
---
 arch/arm64/boot/dts/amlogic/Makefile          |   1 +
 .../boot/dts/amlogic/meson-g12b-zora-p1.dts   | 103 ++++++++++++++++++
 2 files changed, 104 insertions(+)
 create mode 100644 arch/arm64/boot/dts/amlogic/meson-g12b-zora-p1.dts

diff --git a/arch/arm64/boot/dts/amlogic/Makefile b/arch/arm64/boot/dts/amlogic/Makefile
index 57bc440fa..83fb38b94 100644
--- a/arch/arm64/boot/dts/amlogic/Makefile
+++ b/arch/arm64/boot/dts/amlogic/Makefile
@@ -40,6 +40,7 @@ dtb-$(CONFIG_ARCH_MESON) += meson-g12b-radxa-zero2.dtb
 dtb-$(CONFIG_ARCH_MESON) += meson-g12b-s922x-bananapi-m2s.dtb
 dtb-$(CONFIG_ARCH_MESON) += meson-g12b-s922x-khadas-vim3.dtb
 dtb-$(CONFIG_ARCH_MESON) += meson-g12b-ugoos-am6.dtb
+dtb-$(CONFIG_ARCH_MESON) += meson-g12b-zora-p1.dtb
 dtb-$(CONFIG_ARCH_MESON) += meson-gxbb-kii-pro.dtb
 dtb-$(CONFIG_ARCH_MESON) += meson-gxbb-nanopi-k2.dtb
 dtb-$(CONFIG_ARCH_MESON) += meson-gxbb-nexbox-a95x.dtb
diff --git a/arch/arm64/boot/dts/amlogic/meson-g12b-zora-p1.dts b/arch/arm64/boot/dts/amlogic/meson-g12b-zora-p1.dts
new file mode 100644
index 000000000..fe20d39a8
--- /dev/null
+++ b/arch/arm64/boot/dts/amlogic/meson-g12b-zora-p1.dts
@@ -0,0 +1,103 @@
+// SPDX-License-Identifier: (GPL-2.0+ OR MIT)
+/*
+ * Copyright (c) 2026 Alberto Robazza <robazza.alberto@proton.me>
+ */
+
+/dts-v1/;
+
+#include "meson-g12b-a311d.dtsi"
+#include "meson-g12b-odroid-n2.dtsi"
+
+/ {
+	compatible = "orbbec,zora-p1", "amlogic,a311d", "amlogic,g12b";
+	model = "Orbbec Zora P1";
+
+	leds {
+		//The status led on Zora is actually green, same pin as N2, but reversed polarity
+		led-blue {
+			label = "p1:green";
+			gpios = <&gpio_ao GPIOAO_11 GPIO_ACTIVE_LOW>;
+		};
+	};
+
+	sdio_pwrseq: sdio-pwrseq {
+		compatible = "mmc-pwrseq-simple";
+		reset-gpios = <&gpio GPIOX_16 GPIO_ACTIVE_LOW>;
+		clocks = <&wifi32k>;
+		clock-names = "ext_clock";
+	};
+
+	wifi32k: wifi32k {
+		compatible = "pwm-clock";
+		#clock-cells = <0>;
+		clock-frequency = <32768>;
+		pwms = <&pwm_ef 0 30518 0>;
+	};
+
+	sound {
+		model = "ZORA-P1";
+	};
+};
+
+&pwm_ef {
+	status = "okay";
+	pinctrl-0 = <&pwm_e_pins>;
+	pinctrl-names = "default";
+};
+
+/* AP6256 Wi-Fi: Broadcom BCM43456 over SDIO. */
+&sd_emmc_a {
+	status = "okay";
+	pinctrl-0 = <&sdio_pins>;
+	pinctrl-1 = <&sdio_clk_gate_pins>;
+	pinctrl-names = "default", "clk-gate";
+	#address-cells = <1>;
+	#size-cells = <0>;
+
+	bus-width = <4>;
+	cap-sd-highspeed;
+	max-frequency = <100000000>;
+	non-removable;
+	disable-wp;
+	keep-power-in-suspend;
+
+	mmc-pwrseq = <&sdio_pwrseq>;
+	vmmc-supply = <&tflash_vdd>;
+	vqmmc-supply = <&vddao_1v8>;
+
+	wifi@1 {
+		compatible = "brcm,bcm4329-fmac";
+		reg = <1>;
+	};
+};
+
+/* AP6256 Bluetooth: Broadcom BCM4345C5 over UART_A. */
+&uart_A {
+	status = "okay";
+	pinctrl-0 = <&uart_a_pins>, <&uart_a_cts_rts_pins>;
+	pinctrl-names = "default";
+	uart-has-rtscts;
+
+	bluetooth {
+		compatible = "brcm,bcm4345c5";
+		shutdown-gpios = <&gpio GPIOX_6 GPIO_ACTIVE_HIGH>;
+		max-speed = <2000000>;
+		clocks = <&wifi32k>;
+		clock-names = "lpo";
+	};
+};
+
+//vddcpu regulators same as Odroid N2+
+&vddcpu_a {
+	regulator-min-microvolt = <680000>;
+	regulator-max-microvolt = <1040000>;
+
+	pwms = <&pwm_ab 0 1500 0>;
+};
+
+&vddcpu_b {
+	regulator-min-microvolt = <680000>;
+	regulator-max-microvolt = <1040000>;
+
+	pwms = <&pwm_AO_cd 1 1500 0>;
+};
-- 
2.55.0

Re: [PATCH v2 3/3] arm64: dts: amlogic: add support for Orbbec Zora P1

[sashiko-bot]

Thank you for your contribution! Sashiko AI review found 1 potential issue(s) to consider:
- [High] Pin multiplexing conflict on GPIOX_16 between the Wi-Fi SDIO power sequence reset and the 32.768kHz PWM clock.
--

--- Patch [3]: [PATCH v2 3/3] arm64: dts: amlogic: add support for Orbbec Zora P1 ---
commit 4c25c22b59ef54a3b08d02aab848d6f6aa6af1ef
Author: Alberto Robazza <robazzalberto@gmail.com>

arm64: dts: amlogic: add support for Orbbec Zora P1

This commit adds device tree support for the Orbbec Zora P1 board, an A311D
based device. It builds upon the ODROID-N2 device tree, adding specific GPIO
wiring for Wi-Fi and Bluetooth over SDIO and UART_A. It also includes the
board's compatible string and LED configurations.

> diff --git a/arch/arm64/boot/dts/amlogic/meson-g12b-zora-p1.dts b/arch/arm64/boot/dts/amlogic/meson-g12b-zora-p1.dts
> new file mode 100644
> --- /dev/null
> +++ b/arch/arm64/boot/dts/amlogic/meson-g12b-zora-p1.dts
[ ... ]
> +	sdio_pwrseq: sdio-pwrseq {
> +		compatible = "mmc-pwrseq-simple";
> +		reset-gpios = <&gpio GPIOX_16 GPIO_ACTIVE_LOW>;
> +		clocks = <&wifi32k>;
> +		clock-names = "ext_clock";
> +	};
> +
> +	wifi32k: wifi32k {
> +		compatible = "pwm-clock";
> +		#clock-cells = <0>;
> +		clock-frequency = <32768>;
> +		pwms = <&pwm_ef 0 30518 0>;
> +	};
[ ... ]
> +&pwm_ef {
> +	status = "okay";
> +	pinctrl-0 = <&pwm_e_pins>;

[Severity: High]
Will this create a pin multiplexing conflict on GPIOX_16?

The sdio_pwrseq node claims GPIOX_16 as a standard GPIO for the reset-gpios
line. However, the pwm_ef node requests the pwm_e_pins pinctrl group. On the
Amlogic G12B platform, pwm_e_pins maps exactly to GPIOX_16.

Since a single physical pin cannot concurrently output a 32kHz PWM clock signal
and function as a static GPIO reset signal for the Wi-Fi module, will the
pinctrl subsystem fail one of the requests and prevent the Wi-Fi module from
initializing?

-- 
Sashiko AI review · https://sashiko.dev/#/patchset/20260726201647.264108-1-robazzalberto@gmail.com?part=3