[PATCH] dt-bindings: axis-fifo: Added missing binding

[PATCH] dt-bindings: axis-fifo: Added missing binding

[Daniel Matyas]

drivers/staging/axis-fifo/axis-fifo.txt file described how the
devicetree of the driver should look like. Convert it to .yaml file.
Issue found by checkpatch.

Signed-off-by: Daniel Matyas <matyasdaniel005@gmail.com>
---
 .../axis-fifo/xlnx,axi-fifo-mm-s.yaml         | 257 ++++++++++++++++++
 1 file changed, 257 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/axis-fifo/xlnx,axi-fifo-mm-s.yaml

diff --git a/Documentation/devicetree/bindings/axis-fifo/xlnx,axi-fifo-mm-s.yaml b/Documentation/devicetree/bindings/axis-fifo/xlnx,axi-fifo-mm-s.yaml
new file mode 100644
index 000000000000..ef1e6bcf782d
--- /dev/null
+++ b/Documentation/devicetree/bindings/axis-fifo/xlnx,axi-fifo-mm-s.yaml
@@ -0,0 +1,257 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/axis-fifo/xlnx,axi-fifo-mm-s.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Xilinx AXI-Stream FIFO v4.1 IP core
+
+maintainers:
+  - Daniel Matyas <matyasdaniel005@gmail.com>
+
+description: |
+  This IP core has read and write AXI-Stream FIFOs, the contents of which can
+  be accessed from the AXI4 memory-mapped interface. This is useful for
+  transferring data from a processor into the FPGA fabric. The driver creates
+  a character device that can be read/written to with standard
+  open/read/write/close.
+
+  See Xilinx PG080 document for IP details.
+
+  Currently supports only store-forward mode with a 32-bit AXI4-Lite
+  interface. DOES NOT support:
+    - cut-through mode
+    - AXI4 (non-lite)
+
+properties:
+  compatible:
+    enum:
+      - xlnx,axis-fifo-mm-s-4.1
+      - xlnx,axis-fifo-mm-s-4.2
+      - xlnx,axis-fifo-mm-s-4.3
+
+  interrupt-names:
+    const: interrupt
+
+  interrupts:
+    maxItems: 1
+
+  reg:
+    maxItems: 1
+
+  xlnx,axi-str-rxd-protocol:
+    $ref: /schemas/types.yaml#/definitions/string
+    const: XIL_AXI_STREAM_ETH_DATA
+    description: AXI4-Stream RX data protocol
+
+  xlnx,axi-str-rxd-tdata-width:
+    $ref: /schemas/types.yaml#/definitions/uint32
+    const: 0x20
+    description: AXI4-Stream RX data width
+
+  xlnx,axi-str-txc-protocol:
+    $ref: /schemas/types.yaml#/definitions/string
+    const: XIL_AXI_STREAM_ETH_CTRL
+    description: AXI4-Stream TX control protocol
+
+  xlnx,axi-str-txc-tdata-width:
+    $ref: /schemas/types.yaml#/definitions/uint32
+    const: 0x20
+    description: AXI4-Stream TX control data width
+
+  xlnx,axi-str-txd-protocol:
+    $ref: /schemas/types.yaml#/definitions/string
+    const: XIL_AXI_STREAM_ETH_DATA
+    description: AXI4-Stream TX data protocol
+
+  xlnx,axi-str-txd-tdata-width:
+    $ref: /schemas/types.yaml#/definitions/uint32
+    const: 0x20
+    description: AXI4-Stream TX data width
+
+  xlnx,axis-tdest-width:
+    $ref: /schemas/types.yaml#/definitions/uint32
+    description: AXI-Stream TDEST width (ignored by the driver)
+
+  xlnx,axis-tid-width:
+    $ref: /schemas/types.yaml#/definitions/uint32
+    description: AXI-Stream TID width (ignored by the driver)
+
+  xlnx,axis-tuser-width:
+    $ref: /schemas/types.yaml#/definitions/uint32
+    description: AXI-Stream TUSER width (ignored by the driver)
+
+  xlnx,data-interface-type:
+    $ref: /schemas/types.yaml#/definitions/uint32
+    const: 0x0
+    description: ignored by the driver
+
+  xlnx,has-axis-tdest:
+    $ref: /schemas/types.yaml#/definitions/uint32
+    const: 0x0
+    description: this feature isn't supported
+
+  xlnx,has-axis-tid:
+    $ref: /schemas/types.yaml#/definitions/uint32
+    const: 0x0
+    description: this feature isn't supported
+
+  xlnx,has-axis-tkeep:
+    $ref: /schemas/types.yaml#/definitions/uint32
+    const: 0x0
+    description: this feature isn't supported
+
+  xlnx,has-axis-tstrb:
+    $ref: /schemas/types.yaml#/definitions/uint32
+    const: 0x0
+    description: this feature isn't supported
+
+  xlnx,has-axis-tuser:
+    $ref: /schemas/types.yaml#/definitions/uint32
+    const: 0x0
+    description: this feature isn't supported
+
+  xlnx,rx-fifo-depth:
+    $ref: /schemas/types.yaml#/definitions/uint32
+    description: Depth of RX FIFO in words
+
+  xlnx,rx-fifo-pe-threshold:
+    $ref: /schemas/types.yaml#/definitions/uint32
+    description: RX programmable empty interrupt threshold
+                 (ignored by the driver)
+
+  xlnx,rx-fifo-pf-threshold:
+    $ref: /schemas/types.yaml#/definitions/uint32
+    description: RX programmable full interrupt threshold
+                 (ignored by the driver)
+
+  xlnx,s-axi-id-width:
+    $ref: /schemas/types.yaml#/definitions/uint32
+    const: 0x4
+    description: ignored by the driver
+
+  xlnx,s-axi4-data-width:
+    $ref: /schemas/types.yaml#/definitions/uint32
+    const: 0x20
+    description: ignored by the driver
+
+  xlnx,select-xpm:
+    $ref: /schemas/types.yaml#/definitions/uint32
+    const: 0x0
+    description: ignored by the driver
+
+  xlnx,tx-fifo-depth:
+    $ref: /schemas/types.yaml#/definitions/uint32
+    description: Depth of TX FIFO in words
+
+  xlnx,tx-fifo-pe-threshold:
+    $ref: /schemas/types.yaml#/definitions/uint32
+    description: TX programmable empty interrupt threshold
+                 (ignored by the driver)
+
+  xlnx,tx-fifo-pf-threshold:
+    $ref: /schemas/types.yaml#/definitions/uint32
+    description: TX programmable full interrupt threshold
+                 (ignored by the driver)
+
+  xlnx,use-rx-cut-through:
+    $ref: /schemas/types.yaml#/definitions/uint32
+    const: 0x0
+    description: this feature isn't supported
+
+  xlnx,use-rx-data:
+    $ref: /schemas/types.yaml#/definitions/uint32
+    enum: [0x0, 0x1]
+    description: <0x1> if RX FIFO is enabled, <0x0> otherwise
+
+  xlnx,use-tx-ctrl:
+    $ref: /schemas/types.yaml#/definitions/uint32
+    const: 0x0
+    description: this feature isn't supported
+
+  xlnx,use-tx-cut-through:
+    $ref: /schemas/types.yaml#/definitions/uint32
+    const: 0x0
+    description: this feature isn't supported
+
+  xlnx,use-tx-data:
+    $ref: /schemas/types.yaml#/definitions/uint32
+    enum: [0x0, 0x1]
+    description: <0x1> if TX FIFO is enabled, <0x0> otherwise
+
+required:
+  - compatible
+  - interrupt-names
+  - interrupts
+  - reg
+  - xlnx,axi-str-rxd-protocol
+  - xlnx,axi-str-rxd-tdata-width
+  - xlnx,axi-str-txc-protocol
+  - xlnx,axi-str-txc-tdata-width
+  - xlnx,axi-str-txd-protocol
+  - xlnx,axi-str-txd-tdata-width
+  - xlnx,axis-tdest-width
+  - xlnx,axis-tid-width
+  - xlnx,axis-tuser-width
+  - xlnx,data-interface-type
+  - xlnx,has-axis-tdest
+  - xlnx,has-axis-tid
+  - xlnx,has-axis-tkeep
+  - xlnx,has-axis-tstrb
+  - xlnx,has-axis-tuser
+  - xlnx,rx-fifo-depth
+  - xlnx,rx-fifo-pe-threshold
+  - xlnx,rx-fifo-pf-threshold
+  - xlnx,s-axi-id-width
+  - xlnx,s-axi4-data-width
+  - xlnx,select-xpm
+  - xlnx,tx-fifo-depth
+  - xlnx,tx-fifo-pe-threshold
+  - xlnx,tx-fifo-pf-threshold
+  - xlnx,use-rx-cut-through
+  - xlnx,use-rx-data
+  - xlnx,use-tx-ctrl
+  - xlnx,use-tx-cut-through
+  - xlnx,use-tx-data
+
+additionalProperties: false
+
+examples:
+  - |
+    axi_fifo_mm_s_0: axi_fifo_mm_s@43c00000 {
+      compatible = "xlnx,axi-fifo-mm-s-4.1";
+      interrupt-names = "interrupt";
+      interrupt-parent = <&intc>;
+      interrupts = <0 29 4>;
+      reg = <0x43c00000 0x10000>;
+      xlnx,axi-str-rxd-protocol = "XIL_AXI_STREAM_ETH_DATA";
+      xlnx,axi-str-rxd-tdata-width = <0x20>;
+      xlnx,axi-str-txc-protocol = "XIL_AXI_STREAM_ETH_CTRL";
+      xlnx,axi-str-txc-tdata-width = <0x20>;
+      xlnx,axi-str-txd-protocol = "XIL_AXI_STREAM_ETH_DATA";
+      xlnx,axi-str-txd-tdata-width = <0x20>;
+      xlnx,axis-tdest-width = <0x4>;
+      xlnx,axis-tid-width = <0x4>;
+      xlnx,axis-tuser-width = <0x4>;
+      xlnx,data-interface-type = <0x0>;
+      xlnx,has-axis-tdest = <0x0>;
+      xlnx,has-axis-tid = <0x0>;
+      xlnx,has-axis-tkeep = <0x0>;
+      xlnx,has-axis-tstrb = <0x0>;
+      xlnx,has-axis-tuser = <0x0>;
+      xlnx,rx-fifo-depth = <0x200>;
+      xlnx,rx-fifo-pe-threshold = <0x2>;
+      xlnx,rx-fifo-pf-threshold = <0x1fb>;
+      xlnx,s-axi-id-width = <0x4>;
+      xlnx,s-axi4-data-width = <0x20>;
+      xlnx,select-xpm = <0x0>;
+      xlnx,tx-fifo-depth = <0x8000>;
+      xlnx,tx-fifo-pe-threshold = <0x200>;
+      xlnx,tx-fifo-pf-threshold = <0x7ffb>;
+      xlnx,use-rx-cut-through = <0x0>;
+      xlnx,use-rx-data = <0x0>;
+      xlnx,use-tx-ctrl = <0x0>;
+      xlnx,use-tx-cut-through = <0x0>;
+      xlnx,use-tx-data = <0x1>;
+    };
+...
-- 
2.43.0

Re: [PATCH] dt-bindings: axis-fifo: Added missing binding

[Rob Herring (Arm)]

On Wed, 16 Sep 2026 23:11:50 +0300, Daniel Matyas wrote:
> drivers/staging/axis-fifo/axis-fifo.txt file described how the
> devicetree of the driver should look like. Convert it to .yaml file.
> Issue found by checkpatch.
> 
> Signed-off-by: Daniel Matyas <matyasdaniel005@gmail.com>
> ---
>  .../axis-fifo/xlnx,axi-fifo-mm-s.yaml         | 257 ++++++++++++++++++
>  1 file changed, 257 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/axis-fifo/xlnx,axi-fifo-mm-s.yaml
> 

My bot found errors running 'make dt_binding_check' on your patch:

yamllint warnings/errors:

dtschema/dtc warnings/errors:
Documentation/devicetree/bindings/axis-fifo/xlnx,axi-fifo-mm-s.example.dtb: /example-0/axi_fifo_mm_s@43c00000: failed to match any schema with compatible: ['xlnx,axi-fifo-mm-s-4.1']

doc reference errors (make refcheckdocs):

See https://patchwork.kernel.org/project/devicetree/patch/20260916201253.483877-1-matyasdaniel005@gmail.com

The base for the series is generally the latest rc1. A different dependency
should be noted in *this* patch.

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 after running the above command yourself. Note
that DT_SCHEMA_FILES can be set to your schema file to speed up checking
your schema. However, it must be unset to test all examples with your schema.

Re: [PATCH] dt-bindings: axis-fifo: Added missing binding

[Greg KH]

On Wed, Sep 16, 2026 at 11:11:50PM +0300, Daniel Matyas wrote:
> drivers/staging/axis-fifo/axis-fifo.txt file described how the
> devicetree of the driver should look like. Convert it to .yaml file.
> Issue found by checkpatch.
> 
> Signed-off-by: Daniel Matyas <matyasdaniel005@gmail.com>
> ---
>  .../axis-fifo/xlnx,axi-fifo-mm-s.yaml         | 257 ++++++++++++++++++
>  1 file changed, 257 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/axis-fifo/xlnx,axi-fifo-mm-s.yaml

This doesn't delete a file, so is it really a "conversion"?

thanks,

greg k-h

Re: [PATCH] dt-bindings: axis-fifo: Added missing binding

[Krzysztof Kozlowski]

On 16/09/2026 22:11, Daniel Matyas wrote:
> drivers/staging/axis-fifo/axis-fifo.txt file described how the
> devicetree of the driver should look like. Convert it to .yaml file.
> Issue found by checkpatch.

You could have checked before. Stop fixing things just because
checkpatch told you something.

https://lore.kernel.org/all/?q=dfn%3Aaxis-fifo.txt

Same answer as usually, so a "no".

Best regards,
Krzysztof