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From:   Amit Singh Tomar <amittomer25@gmail.com>
To:     andre.przywara@arm.com, afaerber@suse.de, vkoul@kernel.org,
        manivannan.sadhasivam@linaro.org, robh+dt@kernel.org
Cc:     dan.j.williams@intel.com, cristian.ciocaltea@gmail.com,
        linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
        linux-actions@lists.infradead.org, devicetree@vger.kernel.org
Subject: [PATCH v4 05/10] dt-bindings: dmaengine: convert Actions Semi Owl SoCs bindings to yaml
Date:   Tue,  9 Jun 2020 15:47:05 +0530
Message-Id: <1591697830-16311-6-git-send-email-amittomer25@gmail.com>
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Converts the device tree bindings for the Actions Semi Owl SoCs DMA
Controller over to YAML schemas.

It also adds new compatible string "actions,s700-dma".

Signed-off-by: Amit Singh Tomar <amittomer25@gmail.com>
---
Changes since v3:
	* No change.
Changes since v2:
        * Addressed Rob's comments:
           - removed unnecessary description.
           - added unevaluatedProperties
           - added relevant information about
             dma-channels and dma-request
        * Added power-domain property.
Change since v1:
        * Updated the description field to reflect
          only the necessary information.
        * replaced the maxItems field with description for each
          controller attribute(except interrupts).
        * Replaced the clock macro with number to keep the example
          as independent as possible.

 New patch, was not there in RFC.
---
 Documentation/devicetree/bindings/dma/owl-dma.txt  | 47 -------------
 Documentation/devicetree/bindings/dma/owl-dma.yaml | 79 ++++++++++++++++++++++
 2 files changed, 79 insertions(+), 47 deletions(-)
 delete mode 100644 Documentation/devicetree/bindings/dma/owl-dma.txt
 create mode 100644 Documentation/devicetree/bindings/dma/owl-dma.yaml

diff --git a/Documentation/devicetree/bindings/dma/owl-dma.txt b/Documentation/devicetree/bindings/dma/owl-dma.txt
deleted file mode 100644
index 03e9bb12b75f..000000000000
--- a/Documentation/devicetree/bindings/dma/owl-dma.txt
+++ /dev/null
@@ -1,47 +0,0 @@
-* Actions Semi Owl SoCs DMA controller
-
-This binding follows the generic DMA bindings defined in dma.txt.
-
-Required properties:
-- compatible: Should be "actions,s900-dma".
-- reg: Should contain DMA registers location and length.
-- interrupts: Should contain 4 interrupts shared by all channel.
-- #dma-cells: Must be <1>. Used to represent the number of integer
-              cells in the dmas property of client device.
-- dma-channels: Physical channels supported.
-- dma-requests: Number of DMA request signals supported by the controller.
-                Refer to Documentation/devicetree/bindings/dma/dma.txt
-- clocks: Phandle and Specifier of the clock feeding the DMA controller.
-
-Example:
-
-Controller:
-                dma: dma-controller@e0260000 {
-                        compatible = "actions,s900-dma";
-                        reg = <0x0 0xe0260000 0x0 0x1000>;
-                        interrupts = <GIC_SPI 57 IRQ_TYPE_LEVEL_HIGH>,
-                                     <GIC_SPI 58 IRQ_TYPE_LEVEL_HIGH>,
-                                     <GIC_SPI 59 IRQ_TYPE_LEVEL_HIGH>,
-                                     <GIC_SPI 60 IRQ_TYPE_LEVEL_HIGH>;
-                        #dma-cells = <1>;
-                        dma-channels = <12>;
-                        dma-requests = <46>;
-                        clocks = <&clock CLK_DMAC>;
-                };
-
-Client:
-
-DMA clients connected to the Actions Semi Owl SoCs DMA controller must
-use the format described in the dma.txt file, using a two-cell specifier
-for each channel.
-
-The two cells in order are:
-1. A phandle pointing to the DMA controller.
-2. The channel id.
-
-uart5: serial@e012a000 {
-        ...
-        dma-names = "tx", "rx";
-        dmas = <&dma 26>, <&dma 27>;
-        ...
-};
diff --git a/Documentation/devicetree/bindings/dma/owl-dma.yaml b/Documentation/devicetree/bindings/dma/owl-dma.yaml
new file mode 100644
index 000000000000..5577cd910781
--- /dev/null
+++ b/Documentation/devicetree/bindings/dma/owl-dma.yaml
@@ -0,0 +1,79 @@
+# SPDX-License-Identifier: GPL-2.0
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/dma/owl-dma.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Actions Semi Owl SoCs DMA controller
+
+description: |
+  The OWL DMA is a general-purpose direct memory access controller capable of
+  supporting 10 and 12 independent DMA channels for S700 and S900 SoCs
+  respectively.
+
+maintainers:
+  - Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
+
+allOf:
+  - $ref: "dma-controller.yaml#"
+
+properties:
+  compatible:
+    enum:
+      - actions,s900-dma
+      - actions,s700-dma
+
+  reg:
+    maxItems: 1
+
+  interrupts:
+    description:
+      controller supports 4 interrupts, which are freely assignable to the
+      DMA channels.
+    maxItems: 4
+
+  "#dma-cells":
+    const: 1
+
+  dma-channels:
+    maximum: 12
+
+  dma-requests:
+    maximum: 46
+
+  clocks:
+    maxItems: 1
+    description:
+      Phandle and Specifier of the clock feeding the DMA controller.
+
+  power-domains:
+    maxItems: 1
+
+required:
+  - compatible
+  - reg
+  - interrupts
+  - "#dma-cells"
+  - dma-channels
+  - dma-requests
+  - clocks
+
+unevaluatedProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/interrupt-controller/arm-gic.h>
+    dma: dma-controller@e0260000 {
+        compatible = "actions,s900-dma";
+        reg = <0x0 0xe0260000 0x0 0x1000>;
+        interrupts = <GIC_SPI 57 IRQ_TYPE_LEVEL_HIGH>,
+                     <GIC_SPI 58 IRQ_TYPE_LEVEL_HIGH>,
+                     <GIC_SPI 59 IRQ_TYPE_LEVEL_HIGH>,
+                     <GIC_SPI 60 IRQ_TYPE_LEVEL_HIGH>;
+        #dma-cells = <1>;
+        dma-channels = <12>;
+        dma-requests = <46>;
+        clocks = <&clock 22>;
+    };
+
+...
-- 
2.7.4