[PATCH v5 2/7] dt-bindings: mikrobus: Add mikrobus board base

[Ayush Singh <ayush@xxxxxxxxxxxxxxx>]

Base dt bindings for mikrobus addon boards. Contains properties that are
part of all types of boards (SPI, I2C, etc).

Each pin in mikroBUS connector can either be used for it's original
purpose (UART, I2C, SPI, etc) or as a normal GPIO. Introducing
`pinctrl-apply` allows selecting the pin configuration by name.

Note: Some mikrobus-connectors might not support all valid pinctrl.

Signed-off-by: Ayush Singh <ayush@xxxxxxxxxxxxxxx>
---
 .../devicetree/bindings/mikrobus/mikrobus-board.yaml | 20 ++++++++++++++++++++
 MAINTAINERS                                          |  1 +
 2 files changed, 21 insertions(+)

diff --git a/Documentation/devicetree/bindings/mikrobus/mikrobus-board.yaml b/Documentation/devicetree/bindings/mikrobus/mikrobus-board.yaml
new file mode 100644
index 000000000000..42e2219c596f
--- /dev/null
+++ b/Documentation/devicetree/bindings/mikrobus/mikrobus-board.yaml
@@ -0,0 +1,20 @@
+# SPDX-License-Identifier: GPL-2.0 OR BSD-2-Clause
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/mikrobus/mikrobus-board.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: mikroBUS add-on board properties
+
+maintainers:
+  - Ayush Singh <ayush@xxxxxxxxxxxxxxx>
+
+properties:
+  pinctrl-apply:
+    minItems: 1
+    maxItems: 9
+    items:
+      enum: [default, pwm_default, pwm_gpio, uart_default, uart_gpio, i2c_default, i2c_gpio, spi_default,
+             spi_gpio]
+
+additionalProperties: false
diff --git a/MAINTAINERS b/MAINTAINERS
index 8e4115e93aeb..14eba18832d5 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -15113,6 +15113,7 @@ M:	Ayush Singh <ayush@xxxxxxxxxxxxxxx>
 M:	Vaishnav M A <vaishnav@xxxxxxxxxxxxxxx>
 S:	Maintained
 F:	Documentation/devicetree/bindings/connector/mikrobus-connector.yaml
+F:	Documentation/devicetree/bindings/mikrobus/mikrobus-board.yaml
 
 MIKROTIK CRS3XX 98DX3236 BOARD SUPPORT
 M:	Luka Kovacic <luka.kovacic@xxxxxxxxxx>

-- 
2.45.2