[PATCH v3] dt-bindings: i2c: nxp,lpc1788-i2c: convert to dt schema

[Kanak Shilledar]

Convert the NXP I2C controller for LPC2xxx/178x/18xx/43xx
to newer DT schema. Created DT schema based on the .txt file
which had `compatible`, `reg`, `interrupts`, `clocks`,
`#address-cells` and `#size-cells` as required properties.

Additional changes to the original .txt binding
- added maintainer from the MAINTAINERS file.
- added resets property required by the corresponding DTS files.

Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski at linaro.org>
Signed-off-by: Kanak Shilledar <kanakshilledar at gmail.com>
---
Changes in v3:
- removed "address-cells" and "size-cells" as per feedback.
Changes in v2:
- updated subject line to include device name.
- changed removed description from properties except `clock-frequency`.
- updated MAINTAINERS to track this file.
---
 .../devicetree/bindings/i2c/i2c-lpc2k.txt     | 33 ------------
 .../bindings/i2c/nxp,lpc1788-i2c.yaml         | 54 +++++++++++++++++++
 MAINTAINERS                                   |  2 +-
 3 files changed, 55 insertions(+), 34 deletions(-)
 delete mode 100644 Documentation/devicetree/bindings/i2c/i2c-lpc2k.txt
 create mode 100644 Documentation/devicetree/bindings/i2c/nxp,lpc1788-i2c.yaml

diff --git a/Documentation/devicetree/bindings/i2c/i2c-lpc2k.txt b/Documentation/devicetree/bindings/i2c/i2c-lpc2k.txt
deleted file mode 100644
index 4101aa621ad4..000000000000
--- a/Documentation/devicetree/bindings/i2c/i2c-lpc2k.txt
+++ /dev/null
@@ -1,33 +0,0 @@
-NXP I2C controller for LPC2xxx/178x/18xx/43xx
-
-Required properties:
- - compatible: must be "nxp,lpc1788-i2c"
- - reg: physical address and length of the device registers
- - interrupts: a single interrupt specifier
- - clocks: clock for the device
- - #address-cells: should be <1>
- - #size-cells: should be <0>
-
-Optional properties:
-- clock-frequency: the desired I2C bus clock frequency in Hz; in
-  absence of this property the default value is used (100 kHz).
-
-Example:
-i2c0: i2c at 400a1000 {
-	compatible = "nxp,lpc1788-i2c";
-	reg = <0x400a1000 0x1000>;
-	interrupts = <18>;
-	clocks = <&ccu1 CLK_APB1_I2C0>;
-	#address-cells = <1>;
-	#size-cells = <0>;
-};
-
-&i2c0 {
-	clock-frequency = <400000>;
-
-	lm75 at 48 {
-		compatible = "nxp,lm75";
-		reg = <0x48>;
-	};
-};
-
diff --git a/Documentation/devicetree/bindings/i2c/nxp,lpc1788-i2c.yaml b/Documentation/devicetree/bindings/i2c/nxp,lpc1788-i2c.yaml
new file mode 100644
index 000000000000..9a1b95c2d03c
--- /dev/null
+++ b/Documentation/devicetree/bindings/i2c/nxp,lpc1788-i2c.yaml
@@ -0,0 +1,54 @@
+# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/i2c/nxp,lpc1788-i2c.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: NXP I2C controller for LPC2xxx/178x/18xx/43xx
+
+maintainers:
+  - Vladimir Zapolskiy <vz at mleia.com>
+
+allOf:
+  - $ref: /schemas/i2c/i2c-controller.yaml#
+
+properties:
+  compatible:
+    const: nxp,lpc1788-i2c
+
+  reg:
+    maxItems: 1
+
+  interrupts:
+    maxItems: 1
+
+  clocks:
+    maxItems: 1
+
+  clock-frequency:
+    description: the desired I2C bus clock frequency in Hz
+    default: 100000
+
+  resets:
+    maxItems: 1
+
+required:
+  - compatible
+  - reg
+  - interrupts
+  - clocks
+
+unevaluatedProperties: false
+
+examples:
+  - |
+    #include "dt-bindings/clock/lpc18xx-ccu.h"
+
+    i2c at 400a1000 {
+        compatible = "nxp,lpc1788-i2c";
+        reg = <0x400a1000 0x1000>;
+        interrupts = <18>;
+        clocks = <&ccu1 CLK_APB1_I2C0>;
+        #address-cells = <1>;
+        #size-cells = <0>;
+    };
diff --git a/MAINTAINERS b/MAINTAINERS
index cf9c9221c388..920e4f28b5ae 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -2374,7 +2374,7 @@ ARM/LPC18XX ARCHITECTURE
 M:	Vladimir Zapolskiy <vz at mleia.com>
 L:	linux-arm-kernel at lists.infradead.org (moderated for non-subscribers)
 S:	Maintained
-F:	Documentation/devicetree/bindings/i2c/i2c-lpc2k.txt
+F:	Documentation/devicetree/bindings/i2c/nxp,lpc1788-i2c.yaml
 F:	arch/arm/boot/dts/nxp/lpc/lpc43*
 F:	drivers/i2c/busses/i2c-lpc2k.c
 F:	drivers/memory/pl172.c
-- 
2.45.2