blob: a0a5d2af21fe696c5e7f8e54851d2e3486e23e4e [file] [log] [blame]
/* sensor_isl29035.c - trigger support for ISL29035 light sensor */
/*
* Copyright (c) 2016 Intel Corporation
*
* SPDX-License-Identifier: Apache-2.0
*/
#define DT_DRV_COMPAT isil_isl29035
#include <zephyr/drivers/i2c.h>
#include <zephyr/sys/util.h>
#include <zephyr/kernel.h>
#include <zephyr/logging/log.h>
#include "isl29035.h"
extern struct isl29035_driver_data isl29035_data;
LOG_MODULE_DECLARE(ISL29035, CONFIG_SENSOR_LOG_LEVEL);
static inline void setup_int(const struct device *dev, bool enable)
{
const struct isl29035_config *config = dev->config;
unsigned int flags = enable
? GPIO_INT_EDGE_TO_ACTIVE
: GPIO_INT_DISABLE;
gpio_pin_interrupt_configure_dt(&config->int_gpio, flags);
}
static inline void handle_int(const struct device *dev)
{
struct isl29035_driver_data *drv_data = dev->data;
setup_int(dev, false);
#if defined(CONFIG_ISL29035_TRIGGER_OWN_THREAD)
k_sem_give(&drv_data->gpio_sem);
#elif defined(CONFIG_ISL29035_TRIGGER_GLOBAL_THREAD)
k_work_submit(&drv_data->work);
#endif
}
static uint16_t isl29035_lux_processed_to_raw(struct sensor_value const *val)
{
uint64_t raw_val;
/* raw_val = val * (2 ^ adc_data_bits) / lux_range */
raw_val = (((uint64_t)val->val1) << ISL29035_ADC_DATA_BITS) +
(((uint64_t)val->val2) << ISL29035_ADC_DATA_BITS) / 1000000U;
return raw_val / ISL29035_LUX_RANGE;
}
int isl29035_attr_set(const struct device *dev,
enum sensor_channel chan,
enum sensor_attribute attr,
const struct sensor_value *val)
{
const struct isl29035_config *config = dev->config;
uint8_t lsb_reg, msb_reg;
uint16_t raw_val;
if (!config->int_gpio.port) {
return -ENOTSUP;
}
if (attr == SENSOR_ATTR_UPPER_THRESH) {
lsb_reg = ISL29035_INT_HT_LSB_REG;
msb_reg = ISL29035_INT_HT_MSB_REG;
} else if (attr == SENSOR_ATTR_LOWER_THRESH) {
lsb_reg = ISL29035_INT_LT_LSB_REG;
msb_reg = ISL29035_INT_LT_MSB_REG;
} else {
return -ENOTSUP;
}
raw_val = isl29035_lux_processed_to_raw(val);
if (i2c_reg_write_byte_dt(&config->i2c,
lsb_reg, raw_val & 0xFF) < 0 ||
i2c_reg_write_byte_dt(&config->i2c,
msb_reg, raw_val >> 8) < 0) {
LOG_DBG("Failed to set attribute.");
return -EIO;
}
return 0;
}
static void isl29035_gpio_callback(const struct device *dev,
struct gpio_callback *cb, uint32_t pins)
{
struct isl29035_driver_data *drv_data =
CONTAINER_OF(cb, struct isl29035_driver_data, gpio_cb);
ARG_UNUSED(pins);
handle_int(drv_data->dev);
}
static void isl29035_thread_cb(const struct device *dev)
{
struct isl29035_driver_data *drv_data = dev->data;
const struct isl29035_config *config = dev->config;
uint8_t val;
/* clear interrupt */
if (i2c_reg_read_byte_dt(&config->i2c,
ISL29035_COMMAND_I_REG, &val) < 0) {
LOG_ERR("isl29035: Error reading command register");
return;
}
if (drv_data->th_handler != NULL) {
drv_data->th_handler(dev, drv_data->th_trigger);
}
setup_int(dev, true);
}
#ifdef CONFIG_ISL29035_TRIGGER_OWN_THREAD
static void isl29035_thread(void *p1, void *p2, void *p3)
{
ARG_UNUSED(p2);
ARG_UNUSED(p3);
const struct device *dev = p1;
struct isl29035_driver_data *drv_data = dev->data;
while (1) {
k_sem_take(&drv_data->gpio_sem, K_FOREVER);
isl29035_thread_cb(dev);
}
}
#endif
#ifdef CONFIG_ISL29035_TRIGGER_GLOBAL_THREAD
static void isl29035_work_cb(struct k_work *work)
{
struct isl29035_driver_data *drv_data =
CONTAINER_OF(work, struct isl29035_driver_data, work);
isl29035_thread_cb(drv_data->dev);
}
#endif
int isl29035_trigger_set(const struct device *dev,
const struct sensor_trigger *trig,
sensor_trigger_handler_t handler)
{
struct isl29035_driver_data *drv_data = dev->data;
const struct isl29035_config *config = dev->config;
if (!config->int_gpio.port) {
return -ENOTSUP;
}
/* disable interrupt callback while changing parameters */
setup_int(dev, false);
drv_data->th_handler = handler;
drv_data->th_trigger = trig;
/* enable interrupt callback */
setup_int(dev, true);
if (gpio_pin_get_dt(&config->int_gpio) > 0) {
handle_int(dev);
}
return 0;
}
int isl29035_init_interrupt(const struct device *dev)
{
struct isl29035_driver_data *drv_data = dev->data;
const struct isl29035_config *config = dev->config;
/* set interrupt persistence */
if (i2c_reg_update_byte_dt(&config->i2c,
ISL29035_COMMAND_I_REG,
ISL29035_INT_PRST_MASK,
ISL29035_INT_PRST_BITS) < 0) {
LOG_DBG("Failed to set interrupt persistence cycles.");
return -EIO;
}
if (!gpio_is_ready_dt(&config->int_gpio)) {
LOG_ERR("GPIO device not ready");
return -ENODEV;
}
gpio_pin_configure_dt(&config->int_gpio, GPIO_INPUT);
gpio_init_callback(&drv_data->gpio_cb,
isl29035_gpio_callback,
BIT(config->int_gpio.pin));
if (gpio_add_callback(config->int_gpio.port, &drv_data->gpio_cb) < 0) {
LOG_DBG("Failed to set gpio callback.");
return -EIO;
}
drv_data->dev = dev;
#if defined(CONFIG_ISL29035_TRIGGER_OWN_THREAD)
k_sem_init(&drv_data->gpio_sem, 0, K_SEM_MAX_LIMIT);
k_thread_create(&drv_data->thread, drv_data->thread_stack,
CONFIG_ISL29035_THREAD_STACK_SIZE,
isl29035_thread,
(void *)dev, NULL, NULL,
K_PRIO_COOP(CONFIG_ISL29035_THREAD_PRIORITY),
0, K_NO_WAIT);
#elif defined(CONFIG_ISL29035_TRIGGER_GLOBAL_THREAD)
drv_data->work.handler = isl29035_work_cb;
#endif
setup_int(dev, true);
return 0;
}