linux-kernel - [PATCH v2 1/2] dt-bindings: misc: adi,axi-tdd: Add device-tree binding for TDD engine

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Message-ID: <20230928092804.22612-2-eliza.balas@analog.com>
Date:   Thu, 28 Sep 2023 12:28:03 +0300
From:   Eliza Balas <eliza.balas@...log.com>
To:     unlisted-recipients:; (no To-header on input)
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>,
        <linux-kernel@...r.kernel.org>, <devicetree@...r.kernel.org>
Subject: [PATCH v2 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.

The reason of creating the generic TDD controller was to reduce
the naming confusion around the existing repurposed TDD core
built for AD9361, as well as expanding its number of output
channels for systems which require more than six controlling signals.

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..8938da801b95
--- /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-2.00.a
+
+  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-2.00.a";
+        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 bf0f54c24f81..c5cc69c83c39 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -1345,6 +1345,13 @@ 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