dt-bindings: i2c: imx: add SoC specific compatible strings for layerscape

Add chip specific compatible strings for layerscape platforms to make it
possible to do SoC specific fix-ups in the driver.

Signed-off-by: Li Yang <leoyang.li@nxp.com>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Wolfram Sang <wsa@kernel.org>

dt-bindings: i2c: imx: Make each example a separate entry

Each independent example should be a separate entry. This allows for
'interrupts' to have different cell sizes.

Signed-off-by: Rob Herring <robh@kernel.org>
Reviewed-by: Oleksij Rempel <o.rempel@pengutronix.de>
Link: https://lore.kernel.org/r/20220119015253.2437352-1-robh@kernel.org

dt-bindings: i2c: imx: hardware do not restrict clock-frequency to only 100 and 400 kHz

clock-frequency is only restricted by the upper limit of 400 kHz.

Found with:
$ DT_SCHEMA_FILES=Documentation/devicetree/bindings/i2c/i2c-imx.yaml make dtbs_check
...
arch/arm64/boot/dts/freescale/imx8mq-librem5-r2.dt.yaml: i2c@30a20000: clock-frequency:0:0: 387000 is not one of [100000, 400000]
From schema: linux/Documentation/devicetree/bindings/i2c/i2c-imx.yaml
...

Fixes: 4bdc44347299 ("dt-bindings: i2c: Convert imx i2c to json-schema")
Signed-off-by: David Heidelberg <david@ixit.cz>
Reviewed-by: Oleksij Rempel <o.rempel@pengutronix.de>
Link: https://lore.kernel.org/r/20211029141134.66170-1-david@ixit.cz
Signed-off-by: Rob Herring <robh@kernel.org>

i2c: imx: mention Oleksij as maintainer of the binding docs

When I removed myself as a maintainer of the yaml file, I missed that
some maintainer is required. Oleksij is already listed in MAINTAINERS
for this file, so add him here as well.

Fixes: 1ae6b3780848 ("i2c: imx: drop me as maintainer of binding docs")
Reviewed-by: Oleksij Rempel <o.rempel@pengutronix.de>
Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: Wolfram Sang <wsa@kernel.org>

i2c: imx: drop me as maintainer of binding docs

I dunno why I got added here, but I haven't been using this driver for
years. Remove me to make space for interested parties.

Signed-off-by: Wolfram Sang <wsa@kernel.org>

dt-bindings: i2c: imx: Fix i.MX 7 compatible matching

The i.MX 7 DTSes use two compatibles so update the binding to fix
dtbs_check warnings like:

arch/arm/boot/dts/imx7d-cl-som-imx7.dt.yaml: i2c@30a20000:
compatible: ['fsl,imx7d-i2c', 'fsl,imx21-i2c'] is not valid under any of the given schemas (Possible causes of the failure):

arch/arm/boot/dts/imx7d-cl-som-imx7.dt.yaml: i2c@30a20000:
compatible: ['fsl,imx7d-i2c', 'fsl,imx21-i2c'] is too long

Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>
Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: Wolfram Sang <wsa@kernel.org>

dt-bindings: i2c: imx: Add properties and use unevaluatedProperties

Additional properties actually might appear (e.g. power-domains) so
describe all typical properties, reference generic i2c schema and use
unevaluatedProperties to fix dtbs_check warnings like:

arch/arm64/boot/dts/freescale/imx8mn-evk.dt.yaml: i2c@30a20000:
'#address-cells', '#size-cells', 'pmic@25' do not match any of the regexes: 'pinctrl-[0-9]+'

Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>
Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: Wolfram Sang <wsa@kernel.org>

dt-bindings: Whitespace clean-ups in schema files

Clean-up incorrect indentation, extra spaces, long lines, and missing
EOF newline in schema files. Most of the clean-ups are for list
indentation which should always be 2 spaces more than the preceding
keyword.

Found with yamllint (which I plan to integrate into the checks).

Cc: linux-arm-kernel@lists.infradead.org
Cc: linux-clk@vger.kernel.org
Cc: dri-devel@lists.freedesktop.org
Cc: linux-spi@vger.kernel.org
Cc: linux-gpio@vger.kernel.org
Cc: linux-remoteproc@vger.kernel.org
Cc: linux-hwmon@vger.kernel.org
Cc: linux-i2c@vger.kernel.org
Cc: linux-fbdev@vger.kernel.org
Cc: linux-iio@vger.kernel.org
Cc: linux-input@vger.kernel.org
Cc: linux-pm@vger.kernel.org
Cc: linux-media@vger.kernel.org
Cc: alsa-devel@alsa-project.org
Cc: linux-mmc@vger.kernel.org
Cc: linux-mtd@lists.infradead.org
Cc: netdev@vger.kernel.org
Cc: linux-rtc@vger.kernel.org
Cc: linux-serial@vger.kernel.org
Cc: linux-usb@vger.kernel.org
Acked-by: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: Rob Herring <robh@kernel.org>

dt-bindings: i2c: Convert imx i2c to json-schema

Convert the i.MX I2C binding to DT schema format using json-schema,
some improvements applied, such as update example based on latest DT
file, add more compatible for existing SoCs, and remove unnecessary
common property "pinctrl".

Signed-off-by: Anson Huang <Anson.Huang@nxp.com>
Link: https://lore.kernel.org/r/1592279454-32551-2-git-send-email-Anson.Huang@nxp.com
Signed-off-by: Rob Herring <robh@kernel.org>