On Tue, 30 Nov 2021 13:13:21 +0200, Sam Protsenko wrote:

Add constants for choosing USIv2 configuration mode in device tree.
Those are further used in USI driver to figure out which value to write
into SW_CONF register. Also document USIv2 IP-core bindings.

Signed-off-by: Sam Protsenko <semen.protsenko@linaro.org>
---
Changes in v2:
  - Combined dt-bindings doc and dt-bindings header patches
  - Added i2c node to example in bindings doc
  - Added mentioning of shared internal circuits
  - Added USI_V2_NONE value to bindings header

 .../bindings/soc/samsung/exynos-usi.yaml      | 135 ++++++++++++++++++
 include/dt-bindings/soc/samsung,exynos-usi.h  |  17 +++
 2 files changed, 152 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/soc/samsung/exynos-usi.yaml
 create mode 100644 include/dt-bindings/soc/samsung,exynos-usi.h

My bot found errors running 'make DT_CHECKER_FLAGS=-m dt_binding_check'
on your patch (DT_CHECKER_FLAGS is new in v5.13):

yamllint warnings/errors:

dtschema/dtc warnings/errors:
Documentation/devicetree/bindings/soc/samsung/exynos-usi.example.dts:35.39-42.15: Warning (unique_unit_address): /example-0/usi@138200c0/serial@13820000: duplicate unit-address (also used in node /example-0/usi@138200c0/i2c@13820000)
Documentation/devicetree/bindings/soc/samsung/exynos-usi.example.dt.yaml:0:0: /example-0/usi@138200c0/i2c@13820000: failed to match any schema with compatible: ['samsung,exynosautov9-hsi2c']

doc reference errors (make refcheckdocs):

See https://patchwork.ozlabs.org/patch/1561571

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.