linux-kernel - [PATCH v2 2/3] dt-bindings: HID: i2c-hid: Introduce bindings for the Goodix GT7375P

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Date:   Fri, 23 Oct 2020 16:22:53 -0700
From:   Douglas Anderson <dianders@...omium.org>
To:     jkosina@...e.cz, benjamin.tissoires@...hat.com,
        gregkh@...uxfoundation.org
Cc:     andrea@...gia.bo.it, kai.heng.feng@...onical.com,
        linux-input@...r.kernel.org, swboyd@...omium.org,
        hdegoede@...hat.com, Douglas Anderson <dianders@...omium.org>,
        Dmitry Torokhov <dmitry.torokhov@...il.com>,
        Rob Herring <robh+dt@...nel.org>, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH v2 2/3] dt-bindings: HID: i2c-hid: Introduce bindings for the Goodix GT7375P

This adds new bindings for the Goodix GT7375P touchscreen.  While this
touchscreen works with generic "i2c-over-hid", the current advice is
to give it its own compatible string.  The cleanest way to do this is
to give it its own bindings.

Among other things, this has the advantage that we can list the two
possible i2c addresses for this device, which gives extra checking.

Signed-off-by: Douglas Anderson <dianders@...omium.org>
---

Changes in v2:
- ("dt-bindings: HID: i2c-hid: Introduce bindings for the Goodix GT7375P") new in v2.

 .../bindings/input/goodix,gt7375p.yaml        | 64 +++++++++++++++++++
 1 file changed, 64 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/input/goodix,gt7375p.yaml

diff --git a/Documentation/devicetree/bindings/input/goodix,gt7375p.yaml b/Documentation/devicetree/bindings/input/goodix,gt7375p.yaml
new file mode 100644
index 000000000000..b5008f89e26c
--- /dev/null
+++ b/Documentation/devicetree/bindings/input/goodix,gt7375p.yaml
@@ -0,0 +1,64 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/input/goodix,gt7375p.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Goodix GT7375P touchscreen
+
+maintainers:
+  - Benjamin Tissoires <benjamin.tissoires@...hat.com>
+  - Douglas Anderson <dianders@...omium.org>
+
+description:
+  Supports the Goodix GT7375P touchscreen.
+
+properties:
+  compatible:
+    items:
+      - const: goodix,gt7375p
+
+  reg:
+    enum:
+      - 0x5d
+      - 0x14
+
+  interrupts:
+    maxItems: 1
+
+  reset-gpios:
+    true
+
+  vdd-supply:
+    description: The 3.3V supply to the touchscreen.
+
+required:
+  - compatible
+  - reg
+  - interrupts
+  - reset-gpios
+  - vdd-supply
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/clock/qcom,rpmh.h>
+    #include <dt-bindings/gpio/gpio.h>
+    #include <dt-bindings/interrupt-controller/irq.h>
+
+    i2c {
+      #address-cells = <1>;
+      #size-cells = <0>;
+
+      ap_ts: touchscreen@5d {
+        compatible = "hid-over-i2c";
+        reg = <0x5d>;
+
+        interrupt-parent = <&tlmm>;
+        interrupts = <9 IRQ_TYPE_LEVEL_LOW>;
+
+        reset-gpios = <&tlmm 8 GPIO_ACTIVE_LOW>;
+        vdd-supply = <&pp3300_ts>;
+      };
+    };
-- 
2.29.0.rc1.297.gfa9743e501-goog