[PATCH v2] dt-bindings: dma: fsl-mxs-dma: Convert MXS DMA to DT schema

[Marek Vasut]

Convert the MXS DMA binding to DT schema format using json-schema.

Drop "interrupt-names" property, since it is broken. The drivers/dma/mxs-dma.c
in Linux kernel does not use it, the property contains duplicate array entries
in existing DTs, and even malformed entries (gmpi, should have been gpmi). Get
rid of that optional property altogether.

Update example node names to be standard dma-controller@ ,
add global interrupt-parent property into example.

Signed-off-by: Marek Vasut <marex at denx.de>
---
Cc: Fabio Estevam <festevam at gmail.com>
Cc: Krzysztof Kozlowski <krzysztof.kozlowski+dt at linaro.org>
Cc: NXP Linux Team <linux-imx at nxp.com>
Cc: Pengutronix Kernel Team <kernel at pengutronix.de>
Cc: Rob Herring <robh+dt at kernel.org>
Cc: Sascha Hauer <s.hauer at pengutronix.de>
Cc: Shawn Guo <shawnguo at kernel.org>
Cc: Vinod Koul <vkoul at kernel.org>
Cc: dmaengine at vger.kernel.org
Cc: linux-arm-kernel at lists.infradead.org
To: devicetree at vger.kernel.org
---
V2: - Drop -items:-enum: and use plain -enum:
    - Fill in blank line between maxItems:8 and if:
    - Move not: past if:
    - Drop the entire allOf section except ref dma-controller.yaml
---
 .../devicetree/bindings/dma/fsl,mxs-dma.yaml  | 80 +++++++++++++++++++
 .../devicetree/bindings/dma/fsl-mxs-dma.txt   | 60 --------------
 2 files changed, 80 insertions(+), 60 deletions(-)
 create mode 100644 Documentation/devicetree/bindings/dma/fsl,mxs-dma.yaml
 delete mode 100644 Documentation/devicetree/bindings/dma/fsl-mxs-dma.txt

diff --git a/Documentation/devicetree/bindings/dma/fsl,mxs-dma.yaml b/Documentation/devicetree/bindings/dma/fsl,mxs-dma.yaml
new file mode 100644
index 0000000000000..add9c77e8b52a
--- /dev/null
+++ b/Documentation/devicetree/bindings/dma/fsl,mxs-dma.yaml
@@ -0,0 +1,80 @@
+# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/dma/fsl,mxs-dma.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Freescale Direct Memory Access (DMA) Controller from i.MX23/i.MX28
+
+maintainers:
+  - Marek Vasut <marex at denx.de>
+
+allOf:
+  - $ref: dma-controller.yaml#
+
+properties:
+  compatible:
+    oneOf:
+      - items:
+          - enum:
+              - fsl,imx6q-dma-apbh
+              - fsl,imx6sx-dma-apbh
+              - fsl,imx7d-dma-apbh
+          - const: fsl,imx28-dma-apbh
+      - enum:
+          - fsl,imx23-dma-apbh
+          - fsl,imx23-dma-apbx
+          - fsl,imx28-dma-apbh
+          - fsl,imx28-dma-apbx
+  reg:
+    maxItems: 1
+
+  clocks:
+    maxItems: 1
+
+  interrupts:
+    minItems: 4
+    maxItems: 16
+
+  "#dma-cells":
+    const: 1
+
+  dma-channels:
+    enum: [4, 8, 16]
+
+required:
+  - compatible
+  - reg
+  - "#dma-cells"
+  - dma-channels
+  - interrupts
+
+additionalProperties: false
+
+examples:
+  - |
+    interrupt-parent = <&irqc>;
+
+    dma-controller at 80004000 {
+      compatible = "fsl,imx28-dma-apbh";
+      reg = <0x80004000 0x2000>;
+      interrupts = <82 83 84 85
+                    88 88 88 88
+                    88 88 88 88
+                    87 86 0 0>;
+      #dma-cells = <1>;
+      dma-channels = <16>;
+    };
+
+    dma-controller at 80024000 {
+      compatible = "fsl,imx28-dma-apbx";
+      reg = <0x80024000 0x2000>;
+      interrupts = <78 79 66 0
+                    80 81 68 69
+                    70 71 72 73
+                    74 75 76 77>;
+      #dma-cells = <1>;
+      dma-channels = <16>;
+    };
+
+...
diff --git a/Documentation/devicetree/bindings/dma/fsl-mxs-dma.txt b/Documentation/devicetree/bindings/dma/fsl-mxs-dma.txt
deleted file mode 100644
index e30e184f50c72..0000000000000
--- a/Documentation/devicetree/bindings/dma/fsl-mxs-dma.txt
+++ /dev/null
@@ -1,60 +0,0 @@
-* Freescale MXS DMA
-
-Required properties:
-- compatible : Should be "fsl,<chip>-dma-apbh" or "fsl,<chip>-dma-apbx"
-- reg : Should contain registers location and length
-- interrupts : Should contain the interrupt numbers of DMA channels.
-  If a channel is empty/reserved, 0 should be filled in place.
-- #dma-cells : Must be <1>.  The number cell specifies the channel ID.
-- dma-channels : Number of channels supported by the DMA controller
-
-Optional properties:
-- interrupt-names : Name of DMA channel interrupts
-
-Supported chips:
-imx23, imx28.
-
-Examples:
-
-dma_apbh: dma-apbh at 80004000 {
-	compatible = "fsl,imx28-dma-apbh";
-	reg = <0x80004000 0x2000>;
-	interrupts = <82 83 84 85
-		      88 88 88 88
-		      88 88 88 88
-		      87 86 0 0>;
-	interrupt-names = "ssp0", "ssp1", "ssp2", "ssp3",
-			  "gpmi0", "gmpi1", "gpmi2", "gmpi3",
-			  "gpmi4", "gmpi5", "gpmi6", "gmpi7",
-			  "hsadc", "lcdif", "empty", "empty";
-	#dma-cells = <1>;
-	dma-channels = <16>;
-};
-
-dma_apbx: dma-apbx at 80024000 {
-	compatible = "fsl,imx28-dma-apbx";
-	reg = <0x80024000 0x2000>;
-	interrupts = <78 79 66 0
-		      80 81 68 69
-		      70 71 72 73
-		      74 75 76 77>;
-	interrupt-names = "auart4-rx", "auart4-tx", "spdif-tx", "empty",
-			  "saif0", "saif1", "i2c0", "i2c1",
-			  "auart0-rx", "auart0-tx", "auart1-rx", "auart1-tx",
-			  "auart2-rx", "auart2-tx", "auart3-rx", "auart3-tx";
-	#dma-cells = <1>;
-	dma-channels = <16>;
-};
-
-DMA clients connected to the MXS DMA controller must use the format
-described in the dma.txt file.
-
-Examples:
-
-auart0: serial at 8006a000 {
-	compatible = "fsl,imx28-auart", "fsl,imx23-auart";
-	reg = <0x8006a000 0x2000>;
-	interrupts = <112>;
-	dmas = <&dma_apbx 8>, <&dma_apbx 9>;
-	dma-names = "rx", "tx";
-};
-- 
2.35.1