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drivers: input: add ft6146 driver

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add initial driver for ft6146

Signed-off-by: Qingsong Gou <gouqs@hotmail.com>
This commit is contained in:
Qingsong Gou
2025-09-21 16:27:13 +08:00
committed by Anas Nashif
parent 1f999e5609
commit 5c52f25f5a
6 changed files with 309 additions and 0 deletions
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1
drivers/input/CMakeLists.txt
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@@ -15,6 +15,7 @@ zephyr_library_sources_ifdef(CONFIG_INPUT_CST816S input_cst816s.c)
zephyr_library_sources_ifdef(CONFIG_INPUT_CY8CMBR3XXX input_cy8cmbr3xxx.c)
zephyr_library_sources_ifdef(CONFIG_INPUT_ESP32_TOUCH_SENSOR input_esp32_touch_sensor.c)
zephyr_library_sources_ifdef(CONFIG_INPUT_FT5336 input_ft5336.c)
zephyr_library_sources_ifdef(CONFIG_INPUT_FT6146 input_ft6146.c)
zephyr_library_sources_ifdef(CONFIG_INPUT_GPIO_KBD_MATRIX input_gpio_kbd_matrix.c)
zephyr_library_sources_ifdef(CONFIG_INPUT_GPIO_KEYS input_gpio_keys.c)
zephyr_library_sources_ifdef(CONFIG_INPUT_GPIO_QDEC input_gpio_qdec.c)

1
drivers/input/Kconfig
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@@ -17,6 +17,7 @@ source "drivers/input/Kconfig.cy8cmbr3xxx"
source "drivers/input/Kconfig.esp32"
source "drivers/input/Kconfig.evdev"
source "drivers/input/Kconfig.ft5336"
source "drivers/input/Kconfig.ft6146"
source "drivers/input/Kconfig.gpio_kbd_matrix"
source "drivers/input/Kconfig.gpio_keys"
source "drivers/input/Kconfig.gpio_qdec"

28
drivers/input/Kconfig.ft6146 Normal file
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@@ -0,0 +1,28 @@
# Copyright (c) 2025 Qingsong Gou <gouqs@hotmail.com>
# SPDX-License-Identifier: Apache-2.0
menuconfig INPUT_FT6146
bool "FT6146 touch controller"
default y
depends on DT_HAS_FOCALTECH_FT6146_ENABLED
select I2C
select INPUT_TOUCH
help
Enable driver for FT6146 capacitive touch controller.
if INPUT_FT6146
config INPUT_FT6146_PERIOD
int "Sample period"
depends on !INPUT_FT6146_INTERRUPT
default 10
help
Sample period in milliseconds when in polling mode.
config INPUT_FT6146_INTERRUPT
bool "FT6146 interrupt support"
default y if $(dt_compat_any_has_prop,$(DT_COMPAT_FOCALTECH_FT6146),int-gpios)
help
Enable interrupt support for the FT6146 touch controller.
endif # INPUT_FT6146

249
drivers/input/input_ft6146.c Normal file
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@@ -0,0 +1,249 @@
/*
* Copyright (c) 2025 Qingsong Gou <gouqs@hotmail.com>
*
* SPDX-License-Identifier: Apache-2.0
*/
#define DT_DRV_COMPAT focaltech_ft6146
#include <zephyr/kernel.h>
#include <zephyr/drivers/i2c.h>
#include <zephyr/drivers/gpio.h>
#include <zephyr/input/input.h>
#include <zephyr/input/input_touch.h>
#include <zephyr/logging/log.h>
LOG_MODULE_REGISTER(ft6146, CONFIG_INPUT_LOG_LEVEL);
/* FT6146 register definitions */
#define FT6146_REG_DEVICE_MODE 0x00
#define FT6146_REG_GEST_ID 0x01
#define FT6146_REG_TD_STATUS 0x02
#define FT6146_REG_P1_XH 0x03
#define FT6146_REG_P1_XL 0x04
#define FT6146_REG_P1_YH 0x05
#define FT6146_REG_P1_YL 0x06
#define FT6146_REG_P1_WEIGHT 0x07
#define FT6146_REG_P1_MISC 0x08
#define FT6146_REG_P2_XH 0x09
#define FT6146_REG_P2_XL 0x0A
#define FT6146_REG_P2_YH 0x0B
#define FT6146_REG_P2_YL 0x0C
#define FT6146_REG_P2_WEIGHT 0x0D
#define FT6146_REG_P2_MISC 0x0E
#define FT6146_REG_THRESHOLD 0x80
#define FT6146_REG_FILTER_COE 0x85
#define FT6146_REG_CTRL 0x86
#define FT6146_REG_TIMEENTERMONITOR 0x87
#define FT6146_REG_PERIODACTIVE 0x88
#define FT6146_REG_PERIODMONITOR 0x89
#define FT6146_REG_RADIAN_VALUE 0x91
#define FT6146_REG_OFFSET_LEFT_RIGHT 0x92
#define FT6146_REG_OFFSET_UP_DOWN 0x93
#define FT6146_REG_DIST_LEFT_RIGHT 0x94
#define FT6146_REG_DIST_UP_DOWN 0x95
#define FT6146_REG_ZOOM_DIS_SQR 0x96
#define FT6146_REG_RADIAN_THRESHOLD 0x97
#define FT6146_REG_SMALL_OBJECT_THRESHOLD 0x98
/* Device mode values */
#define FT6146_DEVICE_MODE_NORMAL 0x00
#define FT6146_DEVICE_MODE_TEST 0x04
#define FT6146_DEVICE_MODE_SYSTEM 0x01
/* Gesture IDs */
#define FT6146_GESTURE_NO_GESTURE 0x00
#define FT6146_GESTURE_MOVE_UP 0x10
#define FT6146_GESTURE_MOVE_RIGHT 0x14
#define FT6146_GESTURE_MOVE_DOWN 0x18
#define FT6146_GESTURE_MOVE_LEFT 0x1C
#define FT6146_GESTURE_ZOOM_IN 0x48
#define FT6146_GESTURE_ZOOM_OUT 0x49
/* Reset timing */
#define FT6146_RESET_DELAY_MS 10
#define FT6146_POST_RESET_DELAY_MS 100
#define CTP_DOWN (0U)
#define CTP_UP (1U)
#define CTP_MOVE (2U)
#define CTP_RESERVE (3U)
#define POSITION_H_MSK 0x0FU
#define EVENT_FLAG_MASK 0xC0U
struct ft6146_data {
const struct device *dev;
struct gpio_callback int_cb;
struct k_work work;
struct k_timer poll_timer;
};
struct ft6146_config {
struct input_touchscreen_common_config common;
struct i2c_dt_spec i2c;
struct gpio_dt_spec reset_gpio;
#ifdef CONFIG_INPUT_FT6146_INTERRUPT
struct gpio_dt_spec int_gpio;
#endif
};
INPUT_TOUCH_STRUCT_CHECK(struct ft6146_config);
static void ft6146_process_touch(const struct device *dev, uint8_t status)
{
const struct ft6146_config *config = dev->config;
uint8_t point_data[9];
uint8_t event_flag;
uint16_t x, y;
int ret;
/* Read touch data */
ret = i2c_burst_read_dt(&config->i2c, FT6146_REG_DEVICE_MODE, point_data,
sizeof(point_data));
if (ret < 0) {
LOG_ERR("Failed to read touch data: %d", ret);
return;
}
event_flag = FIELD_GET(EVENT_FLAG_MASK, point_data[FT6146_REG_P1_XH]);
x = ((point_data[FT6146_REG_P1_XH] & POSITION_H_MSK) << 8) + point_data[FT6146_REG_P1_XL];
y = ((point_data[FT6146_REG_P1_YH] & POSITION_H_MSK) << 8) + point_data[FT6146_REG_P1_YL];
LOG_DBG("event_flag:%d, x:%d, y:%d", event_flag, x, y);
if ((event_flag == CTP_DOWN) || (event_flag == CTP_MOVE)) {
input_touchscreen_report_pos(dev, x, y, K_FOREVER);
input_report_key(dev, INPUT_BTN_TOUCH, 1, true, K_FOREVER);
} else if (event_flag == CTP_UP) {
input_report_key(dev, INPUT_BTN_TOUCH, 0, true, K_FOREVER);
}
}
static void ft6146_work_handler(struct k_work *work)
{
struct ft6146_data *data = CONTAINER_OF(work, struct ft6146_data, work);
const struct device *dev = data->dev;
ft6146_process_touch(dev, 0);
}
#ifndef CONFIG_INPUT_FT6146_INTERRUPT
static void ft6146_poll_timer_handler(struct k_timer *timer)
{
struct ft6146_data *data = CONTAINER_OF(timer, struct ft6146_data, poll_timer);
k_work_submit(&data->work);
}
#else
static void ft6146_isr_handler(const struct device *dev, struct gpio_callback *cb, uint32_t pins)
{
struct ft6146_data *data = CONTAINER_OF(cb, struct ft6146_data, int_cb);
k_work_submit(&data->work);
}
#endif
static int ft6146_reset(const struct device *dev)
{
const struct ft6146_config *config = dev->config;
int ret;
if (!config->reset_gpio.port) {
return 0;
}
if (!device_is_ready(config->reset_gpio.port)) {
LOG_ERR("Reset GPIO not ready");
return -ENODEV;
}
ret = gpio_pin_configure_dt(&config->reset_gpio, GPIO_OUTPUT_ACTIVE);
if (ret < 0) {
LOG_ERR("Failed to configure reset GPIO: %d", ret);
return ret;
}
k_msleep(FT6146_RESET_DELAY_MS);
/* De-assert reset */
ret = gpio_pin_set_dt(&config->reset_gpio, 0);
if (ret < 0) {
LOG_ERR("Failed to de-assert reset: %d", ret);
return ret;
}
k_msleep(FT6146_POST_RESET_DELAY_MS);
return ret;
}
static int ft6146_init(const struct device *dev)
{
const struct ft6146_config *config = dev->config;
struct ft6146_data *data = dev->data;
int ret;
if (!i2c_is_ready_dt(&config->i2c)) {
LOG_ERR("I2C bus not ready");
return -ENODEV;
}
data->dev = dev;
/* Perform reset sequence */
ret = ft6146_reset(dev);
if (ret < 0) {
return ret;
}
/* Initialize work queue */
k_work_init(&data->work, ft6146_work_handler);
#ifdef CONFIG_INPUT_FT6146_INTERRUPT
if (!gpio_is_ready_dt(&config->int_gpio)) {
LOG_ERR("Interrupt GPIO controller device not ready");
return -ENODEV;
}
ret = gpio_pin_configure_dt(&config->int_gpio, GPIO_INPUT);
if (ret < 0) {
LOG_ERR("Failed to configure interrupt GPIO: %d", ret);
return ret;
}
ret = gpio_pin_interrupt_configure_dt(&config->int_gpio, GPIO_INT_EDGE_TO_ACTIVE);
if (ret < 0) {
LOG_ERR("Failed to configure interrupt: %d", ret);
return ret;
}
gpio_init_callback(&data->int_cb, ft6146_isr_handler, BIT(config->int_gpio.pin));
ret = gpio_add_callback(config->int_gpio.port, &data->int_cb);
if (ret < 0) {
LOG_ERR("Failed to add callback: %d", ret);
return ret;
}
#else
/* Initialize polling timer */
k_timer_init(&data->poll_timer, ft6146_poll_timer_handler, NULL);
k_timer_start(&data->poll_timer, K_MSEC(CONFIG_INPUT_FT6146_PERIOD),
K_MSEC(CONFIG_INPUT_FT6146_PERIOD));
#endif
return ret;
}
#define FT6146_INIT(n) \
static struct ft6146_data ft6146_data_##n; \
\
static const struct ft6146_config ft6146_config_##n = { \
.common = INPUT_TOUCH_DT_INST_COMMON_CONFIG_INIT(n), \
.i2c = I2C_DT_SPEC_INST_GET(n), \
.reset_gpio = GPIO_DT_SPEC_INST_GET_OR(n, reset_gpios, {0}), \
COND_CODE_1(CONFIG_INPUT_FT6146_INTERRUPT, \
(.int_gpio = GPIO_DT_SPEC_INST_GET(n, int_gpios),), ()) }; \
\
DEVICE_DT_INST_DEFINE(n, ft6146_init, NULL, &ft6146_data_##n, &ft6146_config_##n, \
POST_KERNEL, CONFIG_INPUT_INIT_PRIORITY, NULL);
DT_INST_FOREACH_STATUS_OKAY(FT6146_INIT)

17
dts/bindings/input/focaltech,ft6146.yaml Normal file
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@@ -0,0 +1,17 @@
# Copyright (c) 2025 Qingsong Gou <gouqs@hotmail.com>
# SPDX-License-Identifier: Apache-2.0
description: FocalTech FT6146 capacitive touch controller
compatible: "focaltech,ft6146"
include: [i2c-device.yaml, touchscreen-common.yaml]
properties:
int-gpios:
type: phandle-array
description: Interrupt GPIO specification, active low
reset-gpios:
type: phandle-array
description: Reset GPIO specification, active low

13
tests/drivers/build_all/input/app.overlay
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@@ -39,10 +39,12 @@
compatible = "adc-keys";
io-channels = <&test_adc 0>;
keyup-threshold-mv = <0>;
button_0 {
press-thresholds-mv = <1500>, <1750>;
zephyr,code = <0>;
};
button_1 {
press-thresholds-mv = <2500>, <1750>;
zephyr,code = <1>;
@@ -52,6 +54,7 @@
gpio-keys {
compatible = "gpio-keys";
debounce-interval-ms = <30>;
button_0 {
gpios = <&test_gpio 0 0>;
zephyr,code = <0>;
@@ -61,6 +64,7 @@
gpio-keys-polled {
compatible = "gpio-keys";
debounce-interval-ms = <30>;
button_0 {
gpios = <&test_gpio 0 0>;
zephyr,code = <0>;
@@ -134,6 +138,7 @@
analog_axis {
compatible = "analog-axis";
axis-x {
io-channels = <&test_adc 0>;
out-min = <(-127)>;
@@ -174,6 +179,7 @@
sbus {
compatible = "futaba,sbus";
right_stick_x {
channel = <1>;
type = <INPUT_EV_ABS>;
@@ -196,6 +202,13 @@
int-gpios = <&test_gpio 0 0>;
};
ft6146@0 {
compatible = "focaltech,ft6146";
reg = <0x0>;
int-gpios = <&test_gpio 0 0>;
reset-gpios = <&test_gpio 1 0>;
};
gt911@1 {
compatible = "goodix,gt911";
reg = <0x1>;