On Fri, 15 Jan 2021 16:15:42 -0500, Al Cooper wrote:

Add DT bindings for the Broadcom 8250 based UART driver. This
UART is based on an 8250 but adds additional functionality. The
additional features include the ability to use DMA for transfers and
a baud rate clock system that is more accurate at high baud rates.
This UART is backward compatible with the standard 8250 UART.

Signed-off-by: Al Cooper <alcooperx@gmail.com>
---
 .../bindings/serial/brcm,bcm7271-uart.yaml    | 94 +++++++++++++++++++
 1 file changed, 94 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/serial/brcm,bcm7271-uart.yaml

My bot found errors running 'make dt_binding_check' on your patch:

yamllint warnings/errors:

dtschema/dtc warnings/errors:
/builds/robherring/linux-dt-review/Documentation/devicetree/bindings/serial/brcm,bcm7271-uart.yaml: 'additionalProperties' is a required property
/builds/robherring/linux-dt-review/Documentation/devicetree/bindings/serial/brcm,bcm7271-uart.yaml: ignoring, error in schema: 
warning: no schema found in file: ./Documentation/devicetree/bindings/serial/brcm,bcm7271-uart.yaml

See https://patchwork.ozlabs.org/patch/1427364

This check can fail if there are any dependencies. The base for a patch
series is generally the most recent rc1.

If you already ran 'make dt_binding_check' and didn't see the above
error(s), then make sure 'yamllint' is installed and dt-schema is up to
date:

pip3 install dtschema --upgrade

Please check and re-submit.