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    Subject[PATCH V3] dt-bindings: soc: imx: Add binding doc for spba bus
    Date
    Add binding doc for fsl,spba-bus.

    Signed-off-by: Adam Ford <aford173@gmail.com>
    ---
    make dt_binding_check showed no errors if I did this right.

    V3: Rebase sample from aips-bus example
    Split off from series adding i.MX8M Nano functions to reduce noise
    V2: Attempted to update yaml from feedback

    diff --git a/Documentation/devicetree/bindings/Makefile b/Documentation/devicetree/bindings/Makefile
    index f50420099a55..ec8073cb2e71 100644
    --- a/Documentation/devicetree/bindings/Makefile
    +++ b/Documentation/devicetree/bindings/Makefile
    @@ -3,8 +3,6 @@ DT_DOC_CHECKER ?= dt-doc-validate
    DT_EXTRACT_EX ?= dt-extract-example
    DT_MK_SCHEMA ?= dt-mk-schema

    -DT_SCHEMA_LINT = $(shell which yamllint)
    -
    DT_SCHEMA_MIN_VERSION = 2020.8.1

    PHONY += check_dtschema_version
    @@ -26,10 +24,6 @@ find_cmd = find $(srctree)/$(src) \( -name '*.yaml' ! \
    -name 'processed-schema*' ! \
    -name '*.example.dt.yaml' \)

    -quiet_cmd_yamllint = LINT $(src)
    - cmd_yamllint = $(find_cmd) | \
    - xargs $(DT_SCHEMA_LINT) -f parsable -c $(srctree)/$(src)/.yamllint
    -
    quiet_cmd_chk_bindings = CHKDT $@
    cmd_chk_bindings = $(find_cmd) | \
    xargs -n200 -P$$(nproc) $(DT_DOC_CHECKER) -u $(srctree)/$(src)
    @@ -43,7 +37,6 @@ quiet_cmd_mk_schema = SCHEMA $@
    rm -f $$f

    define rule_chkdt
    - $(if $(DT_SCHEMA_LINT),$(call cmd,yamllint),)
    $(call cmd,chk_bindings)
    $(call cmd,mk_schema)
    endef
    @@ -55,7 +48,7 @@ override DTC_FLAGS := \
    -Wno-graph_child_address \
    -Wno-interrupt_provider

    -$(obj)/processed-schema-examples.json: $(DT_DOCS) $(src)/.yamllint check_dtschema_version FORCE
    +$(obj)/processed-schema-examples.json: $(DT_DOCS) check_dtschema_version FORCE
    $(call if_changed_rule,chkdt)

    ifeq ($(DT_SCHEMA_FILES),)
    diff --git a/Documentation/devicetree/bindings/bus/fsl,spba-bus.yaml b/Documentation/devicetree/bindings/bus/fsl,spba-bus.yaml
    new file mode 100644
    index 000000000000..91dae405ed39
    --- /dev/null
    +++ b/Documentation/devicetree/bindings/bus/fsl,spba-bus.yaml
    @@ -0,0 +1,65 @@
    +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
    +%YAML 1.2
    +---
    +$id: http://devicetree.org/schemas/bus/fsl,spba-bus.yaml#
    +$schema: http://devicetree.org/meta-schemas/core.yaml#
    +
    +title: Shared Peripherals Bus Interface
    +
    +maintainers:
    + - Shawn Guo <shawnguo@kernel.org>
    +
    +description: |
    + A simple bus enabling access to shared peripherals.
    +
    + The "spba-bus" follows the "simple-bus" set of properties, as
    + specified in the Devicetree Specification. It is an extension of
    + "simple-bus" because the SDMA controller uses this compatible flag to
    + determine which peripherals are available to it and the range over which
    + the SDMA can access. There are no special clocks for the bus, because
    + the SDMA controller itself has its interrupt, and clock assignments.
    +
    +select:
    + properties:
    + compatible:
    + contains:
    + const: fsl,spba-bus
    + required:
    + - compatible
    +
    +properties:
    + $nodename:
    + pattern: "^bus(@[0-9a-f]+)?$"
    +
    + compatible:
    + items:
    + - const: fsl,spba-bus
    + - const: simple-bus
    +
    + '#address-cells':
    + enum: [ 1, 2 ]
    +
    + '#size-cells':
    + enum: [ 1, 2 ]
    +
    + ranges: true
    +
    +required:
    + - compatible
    + - '#address-cells'
    + - '#size-cells'
    + - ranges
    +
    +additionalProperties: true
    +
    +type: object
    +
    +examples:
    + - |
    + bus@30000000 {
    + compatible = "fsl,spba-bus", "simple-bus";
    + #address-cells = <1>;
    + #size-cells = <1>;
    + reg = <0x30000000 0x100000>;
    + ranges;
    + };
    --
    2.25.1
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