dt-bindings: Fix SPI and I2C bus node names in examples

SPI and I2C bus node names are expected to be "spi" or "i2c",
respectively, with nothing else, a unit-address, or a '-N' index. A
pattern of 'spi0' or 'i2c0' or similar has crept in. Fix all these
cases. Mostly scripted with the following commands:

git grep -l '\si2c[0-9] {' Documentation/devicetree/ | xargs sed -i -e 's/i2c[0-9] {/i2c {/'
git grep -l '\sspi[0-9] {' Documentation/devicetree/ | xargs sed -i -e 's/spi[0-9] {/spi {/'

With this, a few errors in examples were exposed and fixed.

Acked-by: Sam Ravnborg <sam@ravnborg.org>
Reviewed-by: Stephen Boyd <sboyd@kernel.org>
Reviewed-by: Simon Glass <sjg@chromium.org>
Acked-by: Marc Kleine-Budde <mkl@pengutronix.de> # for the microchip,mcp251xfd.yaml
Acked-by: Mark Brown <broonie@kernel.org>
Acked-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
Acked-by: Sebastian Reichel <sebastian.reichel@collabora.com> # for power-supply
Acked-by: Wolfram Sang <wsa@kernel.org>
Acked-by: Lee Jones <lee@kernel.org>
Link: https://lore.kernel.org/r/20230228215433.3944508-1-robh@kernel.org
Signed-off-by: Rob Herring <robh@kernel.org>

dt-bindings: drop redundant part of title (manual)

The Devicetree bindings document does not have to say in the title that
it is a "Devicetree binding" or a "schema", but instead just describe
the hardware.

Manual updates to various binding titles, including capitalizing them.

Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Acked-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Acked-by: Ulf Hansson <ulf.hansson@linaro.org> # MMC
Acked-by: Stephen Boyd <sboyd@kernel.org> # clk
Acked-by: Dmitry Torokhov <dmitry.torokhov@gmail.com> # input
Acked-by: Mark Brown <broonie@kernel.org>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org> # opp
Link: https://lore.kernel.org/r/20221216163815.522628-10-krzysztof.kozlowski@linaro.org
[robh: add trivial-devices.yaml and net/can/microchip,mcp251xfd.yaml]
Signed-off-by: Rob Herring <robh@kernel.org>

dt-bindings: Explicitly allow additional properties in common schemas

In order to add meta-schema checks for additional/unevaluatedProperties
being present, all schema need to make this explicit. As common/shared
schema are included by other schemas, they should always allow for
additionalProperties.

Acked-by: Mark Brown <broonie@kernel.org>
Acked-by: Krzysztof Kozlowski <krzk@kernel.org>
Acked-by: Sebastian Reichel <sre@kernel.org>
Acked-by: Chanwoo Choi <cw00.choi@samsung.com>
Acked-By: Vinod Koul <vkoul@kernel.org>
Acked-by: Lee Jones <lee.jones@linaro.org>
Acked-by: Geert Uytterhoeven <geert+renesas@glider.be>
Acked-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Acked-by: Ulf Hansson <ulf.hansson@linaro.org>
Acked-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Acked-by: Guenter Roeck <linux@roeck-us.net>
Link: https://lore.kernel.org/r/20201005183830.486085-5-robh@kernel.org
Signed-off-by: Rob Herring <robh@kernel.org>

dt-bindings: Remove cases of 'allOf' containing a '$ref'

json-schema versions draft7 and earlier have a weird behavior in that
any keywords combined with a '$ref' are ignored (silently). The correct
form was to put a '$ref' under an 'allOf'. This behavior is now changed
in the 2019-09 json-schema spec and '$ref' can be mixed with other
keywords. The json-schema library doesn't yet support this, but the
tooling now does a fixup for this and either way works.

This has been a constant source of review comments, so let's change this
treewide so everyone copies the simpler syntax.

Scripted with ruamel.yaml with some manual fixups. Some minor whitespace
changes from the script.

Signed-off-by: Rob Herring <robh@kernel.org>
Acked-by: Maxime Ripard <mripard@kernel.org>
Acked-by: Lee Jones <lee.jones@linaro.org>
Acked-By: Vinod Koul <vkoul@kernel.org>
Acked-by: Mark Brown <broonie@kernel.org>
Acked-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Acked-by: Wolfram Sang <wsa@the-dreams.de> # for I2C
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Acked-by: Jonathan Cameron <Jonathan.Cameron@huawei.com> #for-iio
Reviewed-by: Stephen Boyd <sboyd@kernel.org> # clock
Signed-off-by: Rob Herring <robh@kernel.org>

pinctrl: dt-bindings: Fix some errors in the lgm and pinmux schema

This fixes some problems that caused build errors in the
lgm-io schema file:

- No "bindings" infix in the schema id
- Move the allOf inclusion for pinconf and pinmux nodes into
the patternProperties for the -pins node
- We want "groups" not "group" to be compulsory for a pinmux
node blended with a pin config node.
- Fix the generic pinmux-schema to list "groups" rather than
"group" for a pinmux node, this might have led to some confusion.

This is a first user of the generic schema so a bit of a bumpy
road.

Cc: Rob Herring <robh+dt@kernel.org>
Cc: Rahul Tanwar <rahul.tanwar@linux.intel.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

dt-bindings: pinctrl: Convert generic pin mux and config properties to schema

As pinctrl bindings have a flexible structure and no standard child node
naming convention, creating a single pinctrl schema doesn't work. Instead,
create schemas for the pin mux and config nodes which device pinctrl schema
can reference.

Cc: Linus Walleij <linus.walleij@linaro.org>
Cc: linux-gpio@vger.kernel.org
Signed-off-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20191107224254.15712-1-robh@kernel.org
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>