linux-kernel - [PATCH v3 1/2] dt-bindings: misc: adi,axi-tdd: Add device-tree binding for TDD engine

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Date:   Thu, 19 Oct 2023 15:56:45 +0300
From:   Eliza Balas <eliza.balas@...log.com>
To:     <linux-kernel@...r.kernel.org>, <devicetree@...r.kernel.org>
CC:     Eliza Balas <eliza.balas@...log.com>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Conor Dooley <conor+dt@...nel.org>,
        Derek Kiernan <derek.kiernan@....com>,
        Dragan Cvetic <dragan.cvetic@....com>,
        Arnd Bergmann <arnd@...db.de>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Subject: [PATCH v3 1/2] dt-bindings: misc: adi,axi-tdd: Add device-tree binding for TDD engine

Add device tree documentation for the AXI TDD Core.
The generic TDD controller is in essence a waveform generator
capable of addressing RF applications which require Time Division
Duplexing, as well as controlling other modules of general
applications through its dedicated 32 channel outputs.

Signed-off-by: Eliza Balas <eliza.balas@...log.com>
---
 .../devicetree/bindings/misc/adi,axi-tdd.yaml | 65 +++++++++++++++++++
 MAINTAINERS                                   |  7 ++
 2 files changed, 72 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/misc/adi,axi-tdd.yaml

diff --git a/Documentation/devicetree/bindings/misc/adi,axi-tdd.yaml b/Documentation/devicetree/bindings/misc/adi,axi-tdd.yaml
new file mode 100644
index 000000000000..4449d9abf46e
--- /dev/null
+++ b/Documentation/devicetree/bindings/misc/adi,axi-tdd.yaml
@@ -0,0 +1,65 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+# Copyright 2023 Analog Devices Inc.
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/misc/adi,axi-tdd.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Analog Devices AXI TDD Core
+
+maintainers:
+  - Eliza Balas <eliza.balas@...log.com>
+
+description: |
+  The TDD controller is a waveform generator capable of addressing RF
+  applications which require Time Division Duplexing, as well as controlling
+  other modules of general applications through its dedicated 32 channel
+  outputs. It solves the synchronization issue when transmitting and receiving
+  multiple frames of data through multiple buffers.
+  The TDD IP core is part of the Analog Devices hdl reference designs and has
+  the following features:
+    * Up to 32 independent output channels
+    * Start/stop time values per channel
+    * Enable and polarity bit values per channel
+    * 32 bit-max internal reference counter
+    * Initial startup delay before waveform generation
+    * Configurable frame length and number of frames per burst
+    * 3 sources of synchronization: external, internal and software generated
+  For more information see the wiki:
+  https://wiki.analog.com/resources/fpga/docs/axi_tdd
+
+properties:
+  compatible:
+    enum:
+      - adi,axi-tdd
+
+  reg:
+    maxItems: 1
+
+  clocks:
+    items:
+      - description: System clock
+      - description: TDD Core clock
+
+  clock-names:
+    items:
+      - const: s_axi_aclk
+      - const: intf_clk
+
+required:
+  - compatible
+  - reg
+  - clocks
+  - clock-names
+
+unevaluatedProperties: false
+
+examples:
+  - |
+    tdd@...00000 {
+        compatible = "adi,axi-tdd";
+        reg = <0x84a00000 0x10000>;
+        clocks = <&zynqmp_clk_PL0_REF>, <&zynqmp_clk_PL1_REF>;
+        clock-names = "s_axi_aclk", "intf_clk";
+    };
+...
diff --git a/MAINTAINERS b/MAINTAINERS
index 59831c69a275..13a1e1990c19 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -1344,6 +1344,13 @@ S:	Supported
 W:	https://ez.analog.com/linux-software-drivers
 F:	drivers/dma/dma-axi-dmac.c
 
+ANALOG DEVICES INC GENERIC TDD ENGINE DRIVER
+M:	Eliza Balas <eliza.balas@...log.com>
+S:	Supported
+W:	http://wiki.analog.com/resources/fpga/docs/axi_tdd
+W:	http://ez.analog.com/linux-software-drivers/
+F:	Documentation/devicetree/bindings/misc/adi,axi-tdd.yaml
+
 ANALOG DEVICES INC IIO DRIVERS
 M:	Lars-Peter Clausen <lars@...afoo.de>
 M:	Michael Hennerich <Michael.Hennerich@...log.com>
-- 
2.25.1