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* [PATCH v2] dt-bindings: axis-fifo: Added missing binding
@ 2026-09-17 11:48 Daniel Matyas
  2026-09-17 11:58 ` Greg Kroah-Hartman
  2026-09-17 18:24 ` Krzysztof Kozlowski
  0 siblings, 2 replies; 5+ messages in thread
From: Daniel Matyas @ 2026-09-17 11:48 UTC (permalink / raw)
  To: Greg Kroah-Hartman, Rob Herring, Krzysztof Kozlowski,
	Conor Dooley, Daniel Matyas
  Cc: linux-staging, Daniel Matyas, devicetree, linux-kernel

From: Daniel Matyas <matyasdaniel005@gmail.com>

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>
Signed-off-by: Daniel Matyas <matyasdaniel006@gmail.com>
---

Sorry for adding another email. I got locked out of the first one for 30
days...

v2: Corrected syntax errors in compatible:
	xlnx,axis-fifo-mm-s-4.1 -> xlnx,axi-fifo-mm-s-4.1
	xlnx,axis-fifo-mm-s-4.2 -> xlnx,axi-fifo-mm-s-4.2
	xlnx,axis-fifo-mm-s-4.3 -> xlnx,axi-fifo-mm-s-4.3

 .../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..e1b46a2a4b4b
--- /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,axi-fifo-mm-s-4.1
+      - xlnx,axi-fifo-mm-s-4.2
+      - xlnx,axi-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


^ permalink raw reply	[flat|nested] 5+ messages in thread
end of thread, other threads:[~2026-09-17 21:03 UTC | newest]

Thread overview: 5+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2026-09-17 11:48 [PATCH v2] dt-bindings: axis-fifo: Added missing binding Daniel Matyas
2026-09-17 11:58 ` Greg Kroah-Hartman
2026-09-17 15:09   ` Daniel Matyas
2026-09-17 18:24 ` Krzysztof Kozlowski
2026-09-17 19:11   ` Daniel Matyas

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