1 /*
2 * Copyright (c) 2016 Intel Corporation
3 *
4 * SPDX-License-Identifier: Apache-2.0
5 */
6
7 #define DT_DRV_COMPAT honeywell_hmc5883l
8
9 #include <zephyr/device.h>
10 #include <zephyr/drivers/i2c.h>
11 #include <zephyr/sys/__assert.h>
12 #include <zephyr/sys/util.h>
13 #include <zephyr/kernel.h>
14 #include <zephyr/drivers/sensor.h>
15 #include <zephyr/logging/log.h>
16 #include "hmc5883l.h"
17
18 LOG_MODULE_DECLARE(HMC5883L, CONFIG_SENSOR_LOG_LEVEL);
19
hmc5883l_trigger_set(const struct device * dev,const struct sensor_trigger * trig,sensor_trigger_handler_t handler)20 int hmc5883l_trigger_set(const struct device *dev,
21 const struct sensor_trigger *trig,
22 sensor_trigger_handler_t handler)
23 {
24 struct hmc5883l_data *drv_data = dev->data;
25 const struct hmc5883l_config *config = dev->config;
26
27 if (!config->int_gpio.port) {
28 return -ENOTSUP;
29 }
30
31 __ASSERT_NO_MSG(trig->type == SENSOR_TRIG_DATA_READY);
32
33 gpio_pin_interrupt_configure_dt(&config->int_gpio, GPIO_INT_DISABLE);
34
35 drv_data->data_ready_handler = handler;
36 if (handler == NULL) {
37 return 0;
38 }
39
40 drv_data->data_ready_trigger = trig;
41
42 gpio_pin_interrupt_configure_dt(&config->int_gpio,
43 GPIO_INT_EDGE_TO_ACTIVE);
44
45 return 0;
46 }
47
hmc5883l_gpio_callback(const struct device * dev,struct gpio_callback * cb,uint32_t pins)48 static void hmc5883l_gpio_callback(const struct device *dev,
49 struct gpio_callback *cb, uint32_t pins)
50 {
51 struct hmc5883l_data *drv_data =
52 CONTAINER_OF(cb, struct hmc5883l_data, gpio_cb);
53 const struct hmc5883l_config *config = drv_data->dev->config;
54
55 ARG_UNUSED(pins);
56
57 gpio_pin_interrupt_configure_dt(&config->int_gpio, GPIO_INT_DISABLE);
58
59 #if defined(CONFIG_HMC5883L_TRIGGER_OWN_THREAD)
60 k_sem_give(&drv_data->gpio_sem);
61 #elif defined(CONFIG_HMC5883L_TRIGGER_GLOBAL_THREAD)
62 k_work_submit(&drv_data->work);
63 #endif
64 }
65
hmc5883l_thread_cb(const struct device * dev)66 static void hmc5883l_thread_cb(const struct device *dev)
67 {
68 struct hmc5883l_data *drv_data = dev->data;
69 const struct hmc5883l_config *config = dev->config;
70
71 if (drv_data->data_ready_handler != NULL) {
72 drv_data->data_ready_handler(dev,
73 drv_data->data_ready_trigger);
74 }
75
76 gpio_pin_interrupt_configure_dt(&config->int_gpio,
77 GPIO_INT_EDGE_TO_ACTIVE);
78 }
79
80 #ifdef CONFIG_HMC5883L_TRIGGER_OWN_THREAD
hmc5883l_thread(void * p1,void * p2,void * p3)81 static void hmc5883l_thread(void *p1, void *p2, void *p3)
82 {
83 ARG_UNUSED(p2);
84 ARG_UNUSED(p3);
85
86 struct hmc5883l_data *drv_data = p1;
87
88 while (1) {
89 k_sem_take(&drv_data->gpio_sem, K_FOREVER);
90 hmc5883l_thread_cb(drv_data->dev);
91 }
92 }
93 #endif
94
95 #ifdef CONFIG_HMC5883L_TRIGGER_GLOBAL_THREAD
hmc5883l_work_cb(struct k_work * work)96 static void hmc5883l_work_cb(struct k_work *work)
97 {
98 struct hmc5883l_data *drv_data =
99 CONTAINER_OF(work, struct hmc5883l_data, work);
100
101 hmc5883l_thread_cb(drv_data->dev);
102 }
103 #endif
104
hmc5883l_init_interrupt(const struct device * dev)105 int hmc5883l_init_interrupt(const struct device *dev)
106 {
107 struct hmc5883l_data *drv_data = dev->data;
108 const struct hmc5883l_config *config = dev->config;
109
110 if (!gpio_is_ready_dt(&config->int_gpio)) {
111 LOG_ERR("GPIO device not ready");
112 return -ENODEV;
113 }
114
115 gpio_pin_configure_dt(&config->int_gpio, GPIO_INPUT);
116
117 gpio_init_callback(&drv_data->gpio_cb, hmc5883l_gpio_callback,
118 BIT(config->int_gpio.pin));
119
120 if (gpio_add_callback(config->int_gpio.port, &drv_data->gpio_cb) < 0) {
121 LOG_ERR("Failed to set gpio callback.");
122 return -EIO;
123 }
124
125 drv_data->dev = dev;
126
127 #if defined(CONFIG_HMC5883L_TRIGGER_OWN_THREAD)
128 k_sem_init(&drv_data->gpio_sem, 0, K_SEM_MAX_LIMIT);
129
130 k_thread_create(&drv_data->thread, drv_data->thread_stack,
131 CONFIG_HMC5883L_THREAD_STACK_SIZE,
132 hmc5883l_thread,
133 drv_data, NULL, NULL,
134 K_PRIO_COOP(CONFIG_HMC5883L_THREAD_PRIORITY),
135 0, K_NO_WAIT);
136 #elif defined(CONFIG_HMC5883L_TRIGGER_GLOBAL_THREAD)
137 drv_data->work.handler = hmc5883l_work_cb;
138 #endif
139
140 gpio_pin_interrupt_configure_dt(&config->int_gpio,
141 GPIO_INT_EDGE_TO_ACTIVE);
142
143 return 0;
144 }
145
