dts: yaml: Add yaml files for STM32 I2C support to DT

Add yaml files to DT for initial support of STM32 I2C

Origin: original

Signed-off-by: Yannis Damigos <giannis.damigos@gmail.com>

dts/arm/yaml/st,stm32-i2c-v1.yaml

@@ -0,0 +1,42 @@
+---
+title: STM32 I2C V1
+id: st,stm32-i2c-v1
+version: 0.1
+
+description: >
+    This binding gives a base representation of the STM32 I2C V1 controller
+
+inherits:
+  - !include i2c.yaml
+
+properties:
+  - compatible:
+      type: string
+      category: required
+      description: compatible strings
+      constraint: "st,stm32-i2c-v1"
+
+  - reg:
+      type: array
+      description: mmio register space
+      generation: define
+      category: required
+
+  - interrupts:
+      type: array
+      category: required
+      description: required interrupts
+      generation: define
+
+  - interrupt-names:
+      type: stringlist
+      category: optional
+      description: readable string describing the interrupts
+      generation: define
+
+  - clocks:
+      type: array
+      category: required
+      description: Clock gate control information
+      generation: define
+...

dts/arm/yaml/st,stm32-i2c-v2.yaml

@@ -0,0 +1,42 @@
+---
+title: STM32 I2C V2
+id: st,stm32-i2c-v2
+version: 0.1
+
+description: >
+    This binding gives a base representation of the STM32 I2C V2 controller
+
+inherits:
+  - !include i2c.yaml
+
+properties:
+  - compatible:
+      type: string
+      category: required
+      description: compatible strings
+      constraint: "st,stm32-i2c-v2"
+
+  - reg:
+      type: array
+      description: mmio register space
+      generation: define
+      category: required
+
+  - interrupts:
+      type: array
+      category: required
+      description: required interrupts
+      generation: define
+
+  - interrupt-names:
+      type: stringlist
+      category: optional
+      description: readable string describing the interrupts
+      generation: define
+
+  - clocks:
+      type: array
+      category: required
+      description: Clock gate control information
+      generation: define
+...

dts/common/yaml/i2c.yaml

@@ -0,0 +1,25 @@
+---
+title: I2C Base Structure
+id: i2c
+version: 0.1
+
+description: >
+    This binding gives the base structures for all I2C devices
+
+properties:
+  - clock-frequency :
+      type: int
+      category: optional
+      description: Maximum I2C bus clock frequency in Hz
+      generation: define
+  - clocks:
+      type: array
+      category: required
+      description: Clock gate information
+      generation: define
+  - label:
+      type: string
+      category: required
+      description: Human readable string describing the device (used by Zephyr for API name)
+      generation: define
+...