dt-bindings: opp: Describe H616 OPPs and opp-supported-hw

Compared to the existing Allwinner H6 OPP scheme, the H616 uses a
similar NVMEM based mechanism to determine the silicon revision, which
is required to select the right frequency / voltage pair for the OPPs.
However it limits the maximum frequency for some speed bins, also seems
to not support all frequencies in all speed bins, which requires us to
introduce the opp-supported-hw property.

Add this property to the list of allowed properties, also drop the
requirement for the revision specific opp-microvolt properties, since
they might not be needed if using opp-supported-hw.

Also use to opportunity to adjust some wording, and drop a sentence
referring to the Linux driver and the OPP subsystem.

Shorten the existing example and add another example, showcasing the
opp-supported-hw property.

Signed-off-by: Martin Botka <martin.botka@somainline.org>
Signed-off-by: Andre Przywara <andre.przywara@arm.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>

dt-bindings: Add missing start and/or end of line regex anchors

json-schema patterns by default will match anywhere in a string, so
typically we want at least the start or end anchored. Fix the obvious
cases where the anchors were forgotten.

Acked-by: Matti Vaittinen <mazziesaccount@gmail.com>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Acked-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Acked-by: Mark Brown <broonie@kernel.org>
Acked-by: Sergio Paracuellos <sergio.paracuellos@gmail.com>
Acked-by: Guenter Roeck <linux@roeck-us.net>
Link: https://lore.kernel.org/r/20221118223728.1721589-1-robh@kernel.org
Signed-off-by: Rob Herring <robh@kernel.org>

dt-bindings: Remove 'Device Tree Bindings' from end of title:

As indicated in
link: https://lore.kernel.org/all/20220822204945.GA808626-robh@kernel.org/

DT schema files should not have 'Device Tree Binding' as part of there
title: line. Remove this in most .yaml files, so hopefully preventing
developers copying it into new .yaml files, and being asked to remove
it.

Signed-off-by: Andrew Lunn <andrew@lunn.ch>
Link: https://lore.kernel.org/r/20220825020427.3460650-1-andrew@lunn.ch
Signed-off-by: Rob Herring <robh@kernel.org>

dt-bindings: opp: Convert to DT schema

Convert the OPP v1 and v2 bindings to DT schema format. As the OPPv2 binding
can be extended by vendors, we need to split the common part out from the
"operating-points-v2" conforming compatible.

Cc: Yangtao Li <tiny.windzz@gmail.com>
Cc: Nishanth Menon <nm@ti.com>
Cc: Stephen Boyd <sboyd@kernel.org>
Cc: Maxime Ripard <mripard@kernel.org>
Cc: Chen-Yu Tsai <wens@csie.org>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Rob Herring <robh@kernel.org>
Acked-by: Maxime Ripard <maxime@cerno.tech>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>

dt-bindings: Use 'additionalProperties' instead of 'unevaluatedProperties'

In cases where we don't reference another schema, 'additionalProperties'
can be used instead. This is preferred for now as 'unevaluatedProperties'
support isn't implemented yet.

In a few cases, this means adding some missing property definitions of
which most are for SPI bus properties. 'unevaluatedProperties' is not going
to work for the SPI bus properties anyways as they are evaluated from the
parent node, not the SPI child node.

Acked-by: Mark Brown <broonie@kernel.org>
Acked-by: Krzysztof Kozlowski <krzk@kernel.org>
Acked-by: Lee Jones <lee.jones@linaro.org>
Acked-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Acked-by: Guenter Roeck <linux@roeck-us.net>
Link: https://lore.kernel.org/r/20201005183830.486085-3-robh@kernel.org
Signed-off-by: Rob Herring <robh@kernel.org>

dt-bindings: opp: Convert Allwinner H6 OPP to a schema

The Allwinner H6 SoCs use binning in order to provide binning to
cpufreq which is supported in Linux, with a matching Device Tree binding.

Now that we have the DT validation in place, let's convert the device tree
bindings for that controller over to a YAML schemas.

Signed-off-by: Maxime Ripard <maxime@cerno.tech>
Signed-off-by: Rob Herring <robh@kernel.org>