[PATCH 0/4] arm64: dts: allwinner: add Teclast P85T (A523) support

[Mikhail Kalashnikov]

This series adds initial support for the Teclast P85T, an 8-inch tablet
based on the Allwinner A523 (sun55i) SoC.

This initial submission enables only what mainline supports today.

Display (DE/TCON/DSI), PWM backlight, audio codec, camera (CSI/VIN)
and LRADC keys are deliberately left out, as those blocks are
not supported in mainline yet. They will be sent separately.

Patches 1 and 2 overlap with Andre's series
https://lore.kernel.org/linux-sunxi/20260914210115.28151-1-andre.przywara@xxxxxxx/T/#ma8a2554315eccbccdb15ee7ac212a4d0afb45a5c
They are included for compatibility and differ only in the full company
name in the description.

Touchscreen operation requires firmware extraction from the Android
firmware kernel module; the file will be added to a public repository
later.

The values below were obtained experimentally via evtest:
  touchscreen-size-x = <1786>;
  touchscreen-size-y = <1128>;

With the values below the touchscreen and display coordinates match:
  touchscreen-inverted-y;
  touchscreen-swapped-x-y;

U-Boot support requires an LPDDR3 driver for the A523, which will be
sent a bit later.

A ready-to-use image with working display, audio and touchscreen can be
found on the Manjaro forum. Patches will be added as other contributors
add their parts.

Based on 7.3-rc3.

Mikhail Kalashnikov (4):
  dt-bindings: vendor-prefixes: Add vendor prefix for Teclast
  dt-bindings: arm: sunxi: Add Teclast P85T tablet
  arm64: dts: allwinner: sun55i-a523: add I2C0 and I2C1 pin groups
  arm64: dts: allwinner: add Teclast P85T tablet

 .../devicetree/bindings/arm/sunxi.yaml        |   5 +
 .../devicetree/bindings/vendor-prefixes.yaml  |   2 +
 arch/arm64/boot/dts/allwinner/Makefile        |   1 +
 .../allwinner/sun55i-a523-teclast-p85t.dts    | 420 ++++++++++++++++++
 .../arm64/boot/dts/allwinner/sun55i-a523.dtsi |  18 +
 5 files changed, 446 insertions(+)
 create mode 100644 arch/arm64/boot/dts/allwinner/sun55i-a523-teclast-p85t.dts

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2.55.0