[PATCH v3 1/2] dt-bindings: gpio: Add STMPE YAML DT schema

[Linus Walleij <linus.walleij@linaro.org>]

This adds a schema for the STMPE GPIO that while it is used a
lot in the kernel tree is anyway missing its bindings.

Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
---
ChangeLog v2->v3:
- Use a compact hog node schema backed by the standard hog
  schema.
ChangeLog v1->v2:
- New patch split off from the MFD patch.
---
 .../devicetree/bindings/gpio/st,stmpe-gpio.yaml    | 51 ++++++++++++++++++++++
 1 file changed, 51 insertions(+)

diff --git a/Documentation/devicetree/bindings/gpio/st,stmpe-gpio.yaml b/Documentation/devicetree/bindings/gpio/st,stmpe-gpio.yaml
new file mode 100644
index 000000000000..41aa82b8b3eb
--- /dev/null
+++ b/Documentation/devicetree/bindings/gpio/st,stmpe-gpio.yaml
@@ -0,0 +1,51 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/gpio/st,stmpe-gpio.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: STMicroelectonics Port Expander (STMPE) GPIO Block
+
+description: STMicroelectronics Port Expander (STMPE) is a series of slow
+  bus controllers for various expanded peripherals such as GPIO, keypad,
+  touchscreen, ADC, PWM or rotator. It can contain one or several different
+  peripherals connected to SPI or I2C. These bindings pertain to the
+  GPIO portions of these expanders.
+
+maintainers:
+  - Linus Walleij <linus.walleij@linaro.org>
+
+properties:
+  compatible:
+    const: st,stmpe-gpio
+
+  "#gpio-cells":
+    const: 2
+
+  "#interrupt-cells":
+    const: 2
+
+  gpio-controller: true
+
+  interrupt-controller: true
+
+  st,norequest-mask:
+    description: A bitmask of GPIO lines that cannot be requested because for
+      for example not being connected to anything on the system
+    $ref: /schemas/types.yaml#/definitions/uint32
+
+patternProperties:
+  "^.+-hog(-[0-9]+)?$":
+    type: object
+
+    required:
+      - gpio-hog
+
+additionalProperties: false
+
+required:
+  - compatible
+  - "#gpio-cells"
+  - "#interrupt-cells"
+  - gpio-controller
+  - interrupt-controller

-- 
2.34.1