Add the new A9 SoC/board device tree and related bindings.

Signed-off-by: Xianwei Zhao <xianwei.zhao@amlogic.com>
---
Xianwei Zhao (3):
      dt-bindings: arm: amlogic: add A311Y3 support
      dt-bindings: serial: amlogic,meson-uart: Add compatible string for A9
      arm64: dts: add support for A9 based Amlogic BY401

 Documentation/devicetree/bindings/arm/amlogic.yaml |   6 +
 .../bindings/serial/amlogic,meson-uart.yaml        |   1 +
 arch/arm64/boot/dts/amlogic/Makefile               |   1 +
 .../boot/dts/amlogic/amlogic-a9-a311y3-by401.dts   |  41 +++++++
 arch/arm64/boot/dts/amlogic/amlogic-a9.dtsi        | 127 +++++++++++++++++++++
 5 files changed, 176 insertions(+)
---
base-commit: e3194dfb772304a1b7ca3bcfccacefec3468b7bf
change-id: 20260205-a9-baisc-dts-cbbbe2e01f80

Best regards,
-- 
Xianwei Zhao <xianwei.zhao@amlogic.com>