Re: [PATCH v5 1/3] dt-bindings: pwm: Add Xilinx AXI Timer

On Mon, 19 Jul 2021 18:13:20 -0400, Sean Anderson wrote:

This adds a binding for the Xilinx LogiCORE IP AXI Timer. This device is a
"soft" block, so it has some parameters which would not be configurable in
most hardware. This binding is usually automatically generated by Xilinx's
tools, so the names and values of some properties should be kept as they
are, if possible. In addition, this binding is already in the kernel at
arch/microblaze/boot/dts/system.dts, and in user software such as QEMU.

The existing driver uses the clock-frequency property, or alternatively the
/cpus/timebase-frequency property as its frequency input. Because these
properties are deprecated, they have not been included with this schema.
All new bindings should use the clocks/clock-names properties to specify
the parent clock.

Because we need to init timer devices so early in boot, we determine if we
should use the PWM driver or the clocksource/clockevent driver by the
presence/absence, respectively, of #pwm-cells. Because both counters are
used by the PWM, there is no need for a separate property specifying which
counters are to be used for the PWM.

Signed-off-by: Sean Anderson <redacted>
---

Changes in v5:
- Update commit message to reflect revisions
- Fix indentation lint
- Add example for timer binding
- Remove xlnx,axi-timer-2.0 compatible string
- Move schema into the timer directory

Changes in v4:
- Remove references to generate polarity so this can get merged
- Predicate PWM driver on the presence of #pwm-cells
- Make some properties optional for clocksource drivers

Changes in v3:
- Mark all boolean-as-int properties as deprecated
- Add xlnx,pwm and xlnx,gen?-active-low properties.
- Make newer replacement properties mutually-exclusive with what they
  replace
- Add an example with non-deprecated properties only.

Changes in v2:
- Use 32-bit addresses for example binding

 .../bindings/timer/xlnx,xps-timer.yaml        | 91 +++++++++++++++++++
 1 file changed, 91 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/timer/xlnx,xps-timer.yaml

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/timer/xlnx,xps-timer.yaml: $id: relative path/filename doesn't match actual path or filename
	expected: http://devicetree.org/schemas/timer/xlnx,xps-timer.yaml#
\ndoc reference errors (make refcheckdocs):

See https://patchwork.ozlabs.org/patch/1507329

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.