Add device-tree bindings for the pin controller and the EINT controller
found in the MediaTek MT6878 SoC.

Signed-off-by: Igor Belwon <redacted>
---
  .../bindings/pinctrl/mediatek,mt6878-pinctrl.yaml  | 210 +++++++++++++++++++++
  1 file changed, 210 insertions(+)

diff --git a/Documentation/devicetree/bindings/pinctrl/mediatek,mt6878-pinctrl.yaml b/Documentation/devicetree/bindings/pinctrl/mediatek,mt6878-pinctrl.yaml
new file mode 100644
index 0000000000000000000000000000000000000000..f320d286ad2155bc4aa449c195ddff3a8686204c
--- /dev/null
+++ b/Documentation/devicetree/bindings/pinctrl/mediatek,mt6878-pinctrl.yaml

@@ -0,0 +1,210 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/pinctrl/mediatek,mt6878-pinctrl.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: MediaTek MT6878 Pin Controller
+
+maintainers:
+  - AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
+  - Igor Belwon <igor.belwon@mentallysanemainliners.org>
+
+description:
+  The MediaTek MT6878 Pin controller is used to control SoC pins.
+
+properties:
+  compatible:
+    const: mediatek,mt6878-pinctrl
+
+  reg:
+    items:
+      - description: pin controller base
+      - description: bl group IO
+      - description: bm group IO
+      - description: br group IO
+      - description: bl1 group IO
+      - description: br1 group IO
+      - description: lm group IO
+      - description: lt group IO
+      - description: rm group IO
+      - description: rt group IO
+      - description: EINT controller E block
+      - description: EINT controller S block
+      - description: EINT controller W block
+      - description: EINT controller C block
+
+  reg-names:
+    items:
+      - const: base
+      - const: bl
+      - const: bm
+      - const: br
+      - const: bl1
+      - const: br1
+      - const: lm
+      - const: lt
+      - const: rm
+      - const: rt
+      - const: eint-e
+      - const: eint-s
+      - const: eint-w
+      - const: eint-c
+
+  gpio-controller: true
+
+  '#gpio-cells':
+    description:
+      Number of cells in GPIO specifier. Since the generic GPIO binding is used,
+      the amount of cells must be specified as 2. See the below mentioned gpio
+      binding representation for description of particular cells.
+    const: 2
+
+  gpio-ranges:
+    maxItems: 1
+
+  gpio-line-names: true