Add the basic support for the board. (Not officially released yet)
It is based on the Rockchip rk3576 SoC, so I haven't added the
following devices yet:
 - VOP/HDMI
 - UFS
as the support for those has not been merged yet, but are close to be
and I already validated that they work.
It will come with another patch set.

The following devices are supported and working:
 - UART
 - SD Card
 - Ethernet
 - USB
 - RTC

Changes since v1:
 - Add missing dt bindings
 - Remove clock-frequency in rtc node
 - Add line break in pmic pinctrls

Detlev Casanova (1):
  dt-bindings: arm: rockchip: Add Radxa ROCK 4D board

Stephen Chen (1):
  arm64: dts: rockchip: Add Radxa ROCK 4D device tree

 .../devicetree/bindings/arm/rockchip.yaml     |   5 +
 arch/arm64/boot/dts/rockchip/Makefile         |   1 +
 .../boot/dts/rockchip/rk3576-rock-4d.dts      | 651 ++++++++++++++++++
 3 files changed, 657 insertions(+)
 create mode 100644 arch/arm64/boot/dts/rockchip/rk3576-rock-4d.dts

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2.48.1