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drivers: input: ili2132a: add support for ili2132a touch controller

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This commit adds basic ili2132a touch controller driver.

Signed-off-by: Joel Jaldemark <joeljaldemark@outlook.com>
This commit is contained in:
Joel Jaldemark 2024-10-09 07:25:59 +02:00 committed by Alberto Escolar
parent 9451424677
commit 2a1fde7aa3
6 changed files with 176 additions and 0 deletions
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1
drivers/input/CMakeLists.txt
View file

@ -17,6 +17,7 @@ zephyr_library_sources_ifdef(CONFIG_INPUT_GPIO_KBD_MATRIX input_gpio_kbd_matrix.
zephyr_library_sources_ifdef(CONFIG_INPUT_GPIO_KEYS input_gpio_keys.c)
zephyr_library_sources_ifdef(CONFIG_INPUT_GPIO_QDEC input_gpio_qdec.c)
zephyr_library_sources_ifdef(CONFIG_INPUT_GT911 input_gt911.c)
zephyr_library_sources_ifdef(CONFIG_INPUT_ILI2132A input_ili2132a.c)
zephyr_library_sources_ifdef(CONFIG_INPUT_ITE_IT8XXX2_KBD input_ite_it8xxx2_kbd.c)
zephyr_library_sources_ifdef(CONFIG_INPUT_KBD_MATRIX input_kbd_matrix.c)
zephyr_library_sources_ifdef(CONFIG_INPUT_NPCX_KBD input_npcx_kbd.c)

1
drivers/input/Kconfig
View file

@ -19,6 +19,7 @@ source "drivers/input/Kconfig.gpio_kbd_matrix"
source "drivers/input/Kconfig.gpio_keys"
source "drivers/input/Kconfig.gpio_qdec"
source "drivers/input/Kconfig.gt911"
source "drivers/input/Kconfig.ili2132a"
source "drivers/input/Kconfig.it8xxx2"
source "drivers/input/Kconfig.kbd_matrix"
source "drivers/input/Kconfig.npcx"

10
drivers/input/Kconfig.ili2132a Normal file
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@ -0,0 +1,10 @@
# Copyright (c) 2024 Joel Jaldemark
# SPDX-License-Identifier: Apache-2.0
config INPUT_ILI2132A
bool "ILI2132A capacitive touch controller driver"
default y
depends on DT_HAS_ILITEK_ILI2132A_ENABLED
select I2C
help
Enable driver for ilitek ili2132a touch controller

135
drivers/input/input_ili2132a.c Normal file
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@ -0,0 +1,135 @@
/*
* Copyright (c) 2024 Joel Jaldemark
*
* SPDX-License-Identifier: Apache-2.0
*/
#define DT_DRV_COMPAT ilitek_ili2132a
#include <zephyr/drivers/gpio.h>
#include <zephyr/drivers/i2c.h>
#include <zephyr/input/input.h>
#include <zephyr/pm/device.h>
#include <zephyr/sys/byteorder.h>
#include <zephyr/logging/log.h>
LOG_MODULE_REGISTER(ili2132a, CONFIG_INPUT_LOG_LEVEL);
#define IS_TOUCHED_BIT 0x40
#define TIP 1
#define X_COORD 2
#define Y_COORD 4
struct ili2132a_data {
const struct device *dev;
struct gpio_callback gpio_cb;
struct k_work work;
};
struct ili2132a_config {
struct i2c_dt_spec i2c;
struct gpio_dt_spec rst;
struct gpio_dt_spec irq;
};
static void gpio_isr(const struct device *dev, struct gpio_callback *cb, uint32_t pin)
{
struct ili2132a_data *data = CONTAINER_OF(cb, struct ili2132a_data, gpio_cb);
k_work_submit(&data->work);
}
static void ili2132a_process(const struct device *dev)
{
const struct ili2132a_config *dev_cfg = dev->config;
uint8_t buf[8];
uint16_t x, y;
i2c_read_dt(&dev_cfg->i2c, buf, sizeof(buf));
if (buf[TIP] & IS_TOUCHED_BIT) {
x = sys_get_le16(&buf[X_COORD]);
y = sys_get_le16(&buf[Y_COORD]);
input_report_abs(dev, INPUT_ABS_X, x, false, K_FOREVER);
input_report_abs(dev, INPUT_ABS_Y, y, false, K_FOREVER);
input_report_key(dev, INPUT_BTN_TOUCH, 1, true, K_FOREVER);
} else {
input_report_key(dev, INPUT_BTN_TOUCH, 0, true, K_FOREVER);
}
}
static void ili2132a_work_handler(struct k_work *work_item)
{
struct ili2132a_data *data = CONTAINER_OF(work_item, struct ili2132a_data, work);
ili2132a_process(data->dev);
}
static int ili2132a_init(const struct device *dev)
{
struct ili2132a_data *data = dev->data;
const struct ili2132a_config *dev_cfg = dev->config;
int ret;
if (!i2c_is_ready_dt(&dev_cfg->i2c)) {
LOG_ERR("%s is not ready", dev_cfg->i2c.bus->name);
return -ENODEV;
}
if (!gpio_is_ready_dt(&dev_cfg->rst)) {
LOG_ERR("Reset GPIO controller device not ready");
return -ENODEV;
}
if (!gpio_is_ready_dt(&dev_cfg->irq)) {
LOG_ERR("Interrupt GPIO controller device not ready");
return -ENODEV;
}
data->dev = dev;
ret = gpio_pin_configure_dt(&dev_cfg->irq, GPIO_INPUT);
if (ret < 0) {
LOG_ERR("Could not configure interrupt gpio");
return ret;
}
ret = gpio_pin_configure_dt(&dev_cfg->rst, GPIO_OUTPUT_ACTIVE);
if (ret < 0) {
LOG_ERR("Could not configure reset gpio");
return ret;
}
ret = gpio_pin_set_dt(&dev_cfg->rst, 0);
if (ret < 0) {
return ret;
}
gpio_init_callback(&data->gpio_cb, gpio_isr, BIT(dev_cfg->irq.pin));
ret = gpio_add_callback(dev_cfg->irq.port, &data->gpio_cb);
if (ret < 0) {
LOG_ERR("Could not set gpio callback");
return ret;
}
ret = gpio_pin_interrupt_configure_dt(&dev_cfg->irq, GPIO_INT_EDGE_FALLING);
if (ret < 0) {
LOG_ERR("Could not configure interrupt");
return ret;
}
k_work_init(&data->work, ili2132a_work_handler);
return 0;
}
#define ILI2132A_INIT(index) \
static const struct ili2132a_config ili2132a_config_##index = { \
.i2c = I2C_DT_SPEC_INST_GET(index), \
.rst = GPIO_DT_SPEC_INST_GET(index, rst_gpios), \
.irq = GPIO_DT_SPEC_INST_GET(index, irq_gpios), \
}; \
static struct ili2132a_data ili2132a_data_##index; \
DEVICE_DT_INST_DEFINE(index, ili2132a_init, NULL, &ili2132a_data_##index, \
&ili2132a_config_##index, POST_KERNEL, CONFIG_INPUT_INIT_PRIORITY, \
NULL);
DT_INST_FOREACH_STATUS_OKAY(ILI2132A_INIT)

21
dts/bindings/input/ilitek,ili2132a.yaml Normal file
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@ -0,0 +1,21 @@
# Copyright (c) 2024 Joel Jaldemark
# SPDX-License-Identifier: Apache-2.0
description: ILI2132A capacitive touch controller
compatible: "ilitek,ili2132a"
include: i2c-device.yaml
properties:
irq-gpios:
type: phandle-array
required: true
description: |
Interrupt pin
rst-gpios:
type: phandle-array
required: true
description: |
Reset pin

8
tests/drivers/build_all/input/app.overlay
View file

@ -261,6 +261,14 @@
primary-tap-enable;
swap-xy;
};
touch_dev: ili2132a@41 {
compatible = "ilitek,ili2132a";
reg = <0x41>;
irq-gpios = <&test_gpio 0 0>;
rst-gpios = <&test_gpio 1 0>;
};
};
spi@2 {