[PATCH v3] dt-bindings: mtd: cadence: convert cadence-nand-controller.txt to yaml

[niravkumar.l.rabara at intel.com]

From: Niravkumar L Rabara <niravkumar.l.rabara at intel.com>

Convert cadence-nand-controller.txt to yaml format.
Update cadence-nand-controller.txt to cdns,hp-nfc.yaml in MAINTAINER file.

Signed-off-by: Niravkumar L Rabara <niravkumar.l.rabara at intel.com>
---

Changes in v3:
- Changed file name to cdns,hp-nfc.yaml to match with compatible.
- Update description, fixed alignment, and used defines for interrupt
  flag as per review comments in v2.

Changes in v2:
- Update name cadence-nand-controller.txt to cadence,nand.yaml in MAINTAINER
  file to resolve the warning.

 .../bindings/mtd/cadence-nand-controller.txt  | 53 -------------
 .../devicetree/bindings/mtd/cdns,hp-nfc.yaml  | 75 +++++++++++++++++++
 MAINTAINERS                                   |  2 +-
 3 files changed, 76 insertions(+), 54 deletions(-)
 delete mode 100644 Documentation/devicetree/bindings/mtd/cadence-nand-controller.txt
 create mode 100644 Documentation/devicetree/bindings/mtd/cdns,hp-nfc.yaml

diff --git a/Documentation/devicetree/bindings/mtd/cadence-nand-controller.txt b/Documentation/devicetree/bindings/mtd/cadence-nand-controller.txt
deleted file mode 100644
index d2eada5044b2..000000000000
--- a/Documentation/devicetree/bindings/mtd/cadence-nand-controller.txt
+++ /dev/null
@@ -1,53 +0,0 @@
-* Cadence NAND controller
-
-Required properties:
-  - compatible : "cdns,hp-nfc"
-  - reg : Contains two entries, each of which is a tuple consisting of a
-	  physical address and length. The first entry is the address and
-	  length of the controller register set. The second entry is the
-	  address and length of the Slave DMA data port.
-  - reg-names: should contain "reg" and "sdma"
-  - #address-cells: should be 1. The cell encodes the chip select connection.
-  - #size-cells : should be 0.
-  - interrupts : The interrupt number.
-  - clocks: phandle of the controller core clock (nf_clk).
-
-Optional properties:
-  - dmas: shall reference DMA channel associated to the NAND controller
-  - cdns,board-delay-ps : Estimated Board delay. The value includes the total
-    round trip delay for the signals and is used for deciding on values
-    associated with data read capture. The example formula for SDR mode is
-    the following:
-    board delay = RE#PAD delay + PCB trace to device + PCB trace from device
-    + DQ PAD delay
-
-Child nodes represent the available NAND chips.
-
-Required properties of NAND chips:
-  - reg: shall contain the native Chip Select ids from 0 to max supported by
-    the cadence nand flash controller
-
-See Documentation/devicetree/bindings/mtd/nand-controller.yaml for more details on
-generic bindings.
-
-Example:
-
-nand_controller: nand-controller at 60000000 {
-	  compatible = "cdns,hp-nfc";
-	  #address-cells = <1>;
-	  #size-cells = <0>;
-	  reg = <0x60000000 0x10000>, <0x80000000 0x10000>;
-	  reg-names = "reg", "sdma";
-	  clocks = <&nf_clk>;
-	  cdns,board-delay-ps = <4830>;
-	  interrupts = <2 0>;
-	  nand at 0 {
-	      reg = <0>;
-	      label = "nand-1";
-	  };
-	  nand at 1 {
-	      reg = <1>;
-	      label = "nand-2";
-	  };
-
-};
diff --git a/Documentation/devicetree/bindings/mtd/cdns,hp-nfc.yaml b/Documentation/devicetree/bindings/mtd/cdns,hp-nfc.yaml
new file mode 100644
index 000000000000..402930995bd7
--- /dev/null
+++ b/Documentation/devicetree/bindings/mtd/cdns,hp-nfc.yaml
@@ -0,0 +1,75 @@
+# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/mtd/cdns,hp-nfc.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Cadence NAND controller
+
+maintainers:
+  - Niravkumar L Rabara <niravkumar.l.rabara at intel.com>
+
+allOf:
+  - $ref: nand-controller.yaml
+
+properties:
+  compatible:
+    items:
+      - const: cdns,hp-nfc
+
+  reg:
+    items:
+      - description: Controller register set
+      - description: Slave DMA data port register set
+
+  reg-names:
+    items:
+      - const: reg
+      - const: sdma
+
+  interrupts:
+    maxItems: 1
+
+  clocks:
+    maxItems: 1
+
+  dmas:
+    maxItems: 1
+
+  cdns,board-delay-ps:
+    description: |
+      Estimated Board delay. The value includes the total round trip
+      delay for the signals and is used for deciding on values associated
+      with data read capture. The example formula for SDR mode is the
+      following.
+      board delay = RE#PAD delay + PCB trace to device + PCB trace from device
+      + DQ PAD delay
+
+required:
+  - compatible
+  - reg
+  - reg-names
+  - interrupts
+  - clocks
+
+unevaluatedProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/interrupt-controller/arm-gic.h>
+
+    nand-controller at 10b80000 {
+        compatible = "cdns,hp-nfc";
+        reg = <0x10b80000 0x10000>,
+              <0x10840000 0x10000>;
+        reg-names = "reg", "sdma";
+        #address-cells = <1>;
+        #size-cells = <0>;
+        interrupts = <GIC_SPI 97 IRQ_TYPE_LEVEL_HIGH>;
+        clocks = <&nf_clk>;
+        cdns,board-delay-ps = <4830>;
+
+        nand at 0 {
+            reg = <0>;
+        };
+      };
diff --git a/MAINTAINERS b/MAINTAINERS
index 90f13281d297..226efb6352e2 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -4474,7 +4474,7 @@ F:	drivers/media/platform/cadence/cdns-csi2*
 CADENCE NAND DRIVER
 L:	linux-mtd at lists.infradead.org
 S:	Orphan
-F:	Documentation/devicetree/bindings/mtd/cadence-nand-controller.txt
+F:	Documentation/devicetree/bindings/mtd/cdns,hp-nfc.yaml
 F:	drivers/mtd/nand/raw/cadence-nand-controller.c
 
 CADENCE USB3 DRD IP DRIVER
-- 
2.25.1