[PATCH v4 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.

---
Changes in v3:
- Polished meson-g12b-zora-p1.dts.
  - Use proper comment with /* and */.
  - Use the new bindings with function and color properties instead of
    label in leds node.
  - Include dt-bindings/leds/common.h.

---
Changes in v4:
- Dropped unnecessary sentences from patch 1 and 2.
- Renamed "wifi32k" node to "clock-32768" as updated guidelines suggest.

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   | 105 ++++++++++++++++++
 4 files changed, 109 insertions(+)
 create mode 100644 arch/arm64/boot/dts/amlogic/meson-g12b-zora-p1.dts

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2.55.0