linux-kernel - [PATCH v1 27/43] dt-bindings: input: Add Cirrus EP93xx keypad

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Date:   Thu,  1 Jun 2023 08:45:32 +0300
From:   Nikita Shubin <nikita.shubin@...uefel.me>
To:     Alexander Sverdlin <alexander.sverdlin@...il.com>,
        Arnd Bergmann <arnd@...db.de>,
        Linus Walleij <linus.walleij@...aro.org>,
        Dmitry Torokhov <dmitry.torokhov@...il.com>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>
Cc:     Nikita Shubin <nikita.shubin@...uefel.me>,
        Michael Peters <mpeters@...eddedTS.com>,
        Kris Bahnsen <kris@...eddedTS.com>,
        linux-input@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH v1 27/43] dt-bindings: input: Add Cirrus EP93xx keypad

Add YAML bindings for ep93xx SoC keypad.

Signed-off-by: Nikita Shubin <nikita.shubin@...uefel.me>
---

Notes:
    v0 -> v1:
    
    - remove almost all but debounce-delay-ms and prescale
    - s/ep9301-keypad/ep9307-keypad/ it's actually only for
      ep9307, ep9312, ep9315
    
    Krzysztof Kozlowski:
    - renamed file
    - changed maintainers
    - dropped quotes
    - dropped clock-names
    - use fallback compatible and list all possible compatibles
    - fix ident

 .../bindings/input/cirrus,ep9307-keypad.yaml  | 86 +++++++++++++++++++
 1 file changed, 86 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/input/cirrus,ep9307-keypad.yaml

diff --git a/Documentation/devicetree/bindings/input/cirrus,ep9307-keypad.yaml b/Documentation/devicetree/bindings/input/cirrus,ep9307-keypad.yaml
new file mode 100644
index 000000000000..c7eb10a84a6b
--- /dev/null
+++ b/Documentation/devicetree/bindings/input/cirrus,ep9307-keypad.yaml
@@ -0,0 +1,86 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/input/cirrus,ep9307-keypad.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Cirrus ep93xx keypad
+
+maintainers:
+  - Alexander Sverdlin <alexander.sverdlin@...il.com>
+
+allOf:
+  - $ref: /schemas/input/matrix-keymap.yaml#
+
+description: |
+  The KPP is designed to interface with a keypad matrix with 2-point contact
+  or 3-point contact keys. The KPP is designed to simplify the software task
+  of scanning a keypad matrix. The KPP is capable of detecting, debouncing,
+  and decoding one or multiple keys pressed simultaneously on a keypad.
+
+properties:
+  compatible:
+    oneOf:
+      - const: cirrus,ep9307-keypad
+      - items:
+          - enum:
+              - cirrus,ep9312-keypad
+              - cirrus,ep9315-keypad
+          - const: cirrus,ep9307-keypad
+
+  reg:
+    maxItems: 1
+
+  interrupts:
+    maxItems: 1
+
+  clocks:
+    maxItems: 1
+
+  cirrus,debounce-delay-ms:
+    description: |
+          Time in microseconds that key must be pressed or
+          released for state change interrupt to trigger.
+
+  cirrus,prescale:
+    description: row/column counter pre-scaler load value
+    $ref: /schemas/types.yaml#/definitions/uint32
+
+required:
+  - compatible
+  - reg
+  - interrupts
+  - clocks
+  - linux,keymap
+
+unevaluatedProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/clock/cirrus,ep93xx-clock.h>
+    #include <dt-bindings/input/input.h>
+    keypad@...f0000 {
+      compatible = "cirrus,ep9301-keypad";
+      reg = <0x800f0000 0x0c>;
+      interrupt-parent = <&vic0>;
+      interrupts = <29>;
+      clocks = <&syscon EP93XX_CLK_KEYPAD>;
+      pinctrl-names = "default";
+      pinctrl-0 = <&keypad_default_pins>;
+      linux,keymap = <KEY_UP>,
+                     <KEY_DOWN>,
+                     <KEY_VOLUMEDOWN>,
+                     <KEY_HOME>,
+                     <KEY_RIGHT>,
+                     <KEY_LEFT>,
+                     <KEY_ENTER>,
+                     <KEY_VOLUMEUP>,
+                     <KEY_F6>,
+                     <KEY_F8>,
+                     <KEY_F9>,
+                     <KEY_F10>,
+                     <KEY_F1>,
+                     <KEY_F2>,
+                     <KEY_F3>,
+                     <KEY_POWER>;
+    };
-- 
2.37.4