Iqs5xx driver

app/boards/shields/iqs5xx_dev/Kconfig.defconfig

@@ -0,0 +1,2 @@
+config ZMK_KEYBOARD_NAME
+    default "IQS5xx Dev Kit"

app/boards/shields/iqs5xx_dev/iqs5xx_dev.conf

@@ -0,0 +1,23 @@
+CONFIG_LOG=n
+CONFIG_ZMK_USB_LOGGING=n
+CONFIG_ZMK_RTT_LOGGING=n
+# CONFIG_ZMK_LOG_LEVEL_DBG=y
+CONFIG_ZMK_BLE_PASSKEY_ENTRY=n
+
+CONFIG_ZMK_BLE=y
+CONFIG_ZMK_USB=y
+CONFIG_ZMK_SETTINGS_RESET_ON_START=y
+CONFIG_MAIN_STACK_SIZE=8192
+CONFIG_ZMK_BLE_KEYBOARD_REPORT_QUEUE_SIZE=50
+CONFIG_ZMK_BLE_THREAD_STACK_SIZE=4096
+
+# Might not be needed.
+CONFIG_ZMK_HID_CONSUMER_REPORT_USAGES_BASIC=y
+
+CONFIG_I2C=y
+CONFIG_GPIO=y
+CONFIG_PINCTRL=y
+CONFIG_ZMK_MOUSE=y
+CONFIG_ZMK_POINTING=y
+CONFIG_INPUT=y
+CONFIG_INPUT_AZOTEQ_IQS5XX=y

app/boards/shields/iqs5xx_dev/iqs5xx_dev.keymap

@@ -0,0 +1,18 @@
+/*
+ * Copyright (c) 2022 The ZMK Contributors
+ *
+ * SPDX-License-Identifier: MIT
+ */
+
+#include <behaviors.dtsi>
+#include <dt-bindings/zmk/keys.h>
+
+/ {
+    keymap {
+        compatible = "zmk,keymap";
+
+        default_layer {
+            bindings = < &kp SPACE >;
+        };
+    };
+};

app/boards/shields/iqs5xx_dev/iqs5xx_dev.overlay

@@ -0,0 +1,58 @@
+#include <dt-bindings/zmk/matrix_transform.h>
+
+/ {
+	chosen {
+		zmk,kscan = &kscan_direct;
+		zmk,matrix-transform = &default_transform;
+	};
+    kscan_direct: kscan_direct {
+        compatible = "zmk,kscan-gpio-direct";
+        wakeup-source;
+
+        input-gpios
+        = <&gpio1 4 (GPIO_ACTIVE_LOW | GPIO_PULL_UP)>;
+
+    };
+
+    default_transform: keymap_transform_0 {
+        compatible = "zmk,matrix-transform";
+        columns = <1>;
+        rows = <1>;
+        map = < RC(0,0) >;
+    };
+
+    tps43_input: tps43_input {
+        compatible = "zmk,input-listener";
+        device = <&tps43>;
+    };
+};
+
+/*
+* SDA: P0.26
+* SCL: P0.27
+*/
+&arduino_i2c {
+    status = "okay";
+    tps43: iqs5xx@74 {
+        status = "okay";
+        compatible = "azoteq,iqs5xx";
+        reg = <0x74>;
+
+        one-finger-tap;
+        press-and-hold;
+        press-and-hold-time = <250>;
+        two-finger-tap;
+
+        scroll;
+        natural-scroll-y;
+        natural-scroll-x;
+
+        bottom-beta = <5>;
+        stationary-threshold = <5>;
+
+        switch-xy;
+
+        reset-gpios = <&arduino_header 14 GPIO_ACTIVE_LOW>; /* P1.10 */
+        rdy-gpios = <&arduino_header 15 GPIO_ACTIVE_HIGH>; /* P1.11 */
+    };
+};

app/dts/bindings/input/azoteq,iqs5xx-common.yaml

@@ -0,0 +1,63 @@
+properties:
+  rdy-gpios:
+    type: phandle-array
+    description: "Data Ready pin for the Azoteq IQS5xx trackpad"
+
+  reset-gpios:
+    type: phandle-array
+    description: "Reset pin for the Azoteq IQS5xx trackpad"
+
+  one-finger-tap:
+    type: boolean
+    description: "Register single finger tap gestures and report them as a left click"
+
+  press-and-hold:
+    type: boolean
+    description: "Register press and hold gestures and report them as a left click until released"
+
+  press-and-hold-time:
+    type: int
+    description: "Time in ms (in addition to the tap time) it takes to register a press and hold gesture"
+    default: 250
+
+  two-finger-tap:
+    type: boolean
+    description: "Register two finger tap gestures and report them as a right click"
+
+  scroll:
+    type: boolean
+    description: "Register and report scroll gestures, both vertical and horizontal scroll is supported"
+
+  natural-scroll-x:
+    type: boolean
+    description: "Whether content should track finger movement when scrolling on the x axis."
+
+  natural-scroll-y:
+    type: boolean
+    description: "Whether content should track finger movement when scrolling on the y axis."
+
+  switch-xy:
+    type: boolean
+    description: "Flip x and y axes"
+
+  flip-x:
+    type: boolean
+    description: "Invert the direction of the x axis"
+
+  flip-y:
+    type: boolean
+    description: "Invert the direction of the y axis"
+
+  bottom-beta:
+    type: int
+    description: |
+      Amount of filtering applied at slow speeds.
+      0: Most filtering, smoother, but laggier.
+      255: Least filtering, least smooth, more responsive.
+    default: 5
+
+  stationary-threshold:
+    type: int
+    description: |
+      How far a finger must move (in pixels) to not be considered stationary.
+    default: 5

app/dts/bindings/input/azoteq,iqs5xx-i2c.yaml

@@ -0,0 +1,6 @@
+description: |
+  Sensor driver for the Azoteq IQS5XX trackpad, using the I2C interface
+
+compatible: "azoteq,iqs5xx"
+
+include: ["i2c-device.yaml", "azoteq,iqs5xx-common.yaml"]

app/dts/bindings/vendor-prefixes.txt

@@ -1,2 +1,3 @@
 zmk	ZMK Project
-moergo	MoErgo
+moergo	MoErgo
+azoteq	Azoteq (Pty) Ltd.

app/module/drivers/input/CMakeLists.txt

@@ -3,4 +3,6 @@
 
 zephyr_library_amend()
 
+zephyr_library_sources_ifdef(CONFIG_INPUT_AZOTEQ_IQS5XX iqs5xx.c)
+
 zephyr_library_sources_ifdef(CONFIG_ZMK_INPUT_MOCK input_mock.c)

app/module/drivers/input/Kconfig

@@ -1,6 +1,36 @@
 
 if INPUT
 
+menuconfig INPUT_AZOTEQ_IQS5XX
+    bool "Azoteq IQS5xx trackpads"
+    default y
+    depends on GPIO
+    depends on I2C
+    depends on INPUT
+    depends on DT_HAS_AZOTEQ_IQS5XX_ENABLED
+    help
+      Enable driver for Azoteq IQS5xx trackpads.
+
+if INPUT_AZOTEQ_IQS5XX
+
+config INPUT_AZOTEQ_IQS5XX_INIT_PRIORITY
+    int "Azoteq IQS5xx initialization priority"
+    default INPUT_INIT_PRIORITY
+    help
+      Driver initialization priority for the IQS5xx driver.
+      Lower values initialize earlier.
+
+# if ZMK_MOUSE
+# config ZMK_INPUT_AZOTEQ_IQS5XX_IDLE_SLEEPER
+#     bool "IQS5xx Sleep linked to ZMK idle state"
+#     default n
+#     help
+#       If enabled, the driver will suspend/resume the IQS5xx based on
+#       ZMK's activity state changes (e.g. powering down when idle).
+# endif # ZMK_MOUSE
+
+endif # INPUT_AZOTEQ_IQS5XX
+
 config ZMK_INPUT_MOCK
     bool "Input Mock"
     default y