1 /*
2 * Copyright (c) 2016 Intel Corporation
3 *
4 * SPDX-License-Identifier: Apache-2.0
5 */
6
7 #define DT_DRV_COMPAT ti_tmp007
8
9 #include <device.h>
10 #include <drivers/gpio.h>
11 #include <sys/util.h>
12 #include <kernel.h>
13 #include <drivers/sensor.h>
14
15 #include "tmp007.h"
16
17 extern struct tmp007_data tmp007_driver;
18
19 #include <logging/log.h>
20 LOG_MODULE_DECLARE(TMP007, CONFIG_SENSOR_LOG_LEVEL);
21
setup_int(const struct device * dev,bool enable)22 static inline void setup_int(const struct device *dev,
23 bool enable)
24 {
25 struct tmp007_data *data = dev->data;
26
27 gpio_pin_interrupt_configure(data->gpio,
28 DT_INST_GPIO_PIN(0, int_gpios),
29 enable
30 ? GPIO_INT_LEVEL_ACTIVE
31 : GPIO_INT_DISABLE);
32 }
33
tmp007_attr_set(const struct device * dev,enum sensor_channel chan,enum sensor_attribute attr,const struct sensor_value * val)34 int tmp007_attr_set(const struct device *dev,
35 enum sensor_channel chan,
36 enum sensor_attribute attr,
37 const struct sensor_value *val)
38 {
39 struct tmp007_data *drv_data = dev->data;
40 int64_t value;
41 uint8_t reg;
42
43 if (chan != SENSOR_CHAN_AMBIENT_TEMP) {
44 return -ENOTSUP;
45 }
46
47 if (attr == SENSOR_ATTR_UPPER_THRESH) {
48 reg = TMP007_REG_TOBJ_TH_HIGH;
49 } else if (attr == SENSOR_ATTR_LOWER_THRESH) {
50 reg = TMP007_REG_TOBJ_TH_LOW;
51 } else {
52 return -ENOTSUP;
53 }
54
55 value = (int64_t)val->val1 * 1000000 + val->val2;
56 value = (value / TMP007_TEMP_TH_SCALE) << 6;
57
58 if (tmp007_reg_write(drv_data, reg, value) < 0) {
59 LOG_DBG("Failed to set attribute!");
60 return -EIO;
61 }
62
63 return 0;
64 }
65
tmp007_gpio_callback(const struct device * dev,struct gpio_callback * cb,uint32_t pins)66 static void tmp007_gpio_callback(const struct device *dev,
67 struct gpio_callback *cb, uint32_t pins)
68 {
69 struct tmp007_data *drv_data =
70 CONTAINER_OF(cb, struct tmp007_data, gpio_cb);
71
72 setup_int(drv_data->dev, false);
73
74 #if defined(CONFIG_TMP007_TRIGGER_OWN_THREAD)
75 k_sem_give(&drv_data->gpio_sem);
76 #elif defined(CONFIG_TMP007_TRIGGER_GLOBAL_THREAD)
77 k_work_submit(&drv_data->work);
78 #endif
79 }
80
tmp007_thread_cb(const struct device * dev)81 static void tmp007_thread_cb(const struct device *dev)
82 {
83 struct tmp007_data *drv_data = dev->data;
84 uint16_t status;
85
86 if (tmp007_reg_read(drv_data, TMP007_REG_STATUS, &status) < 0) {
87 return;
88 }
89
90 if (status & TMP007_DATA_READY_INT_BIT &&
91 drv_data->drdy_handler != NULL) {
92 drv_data->drdy_handler(dev, &drv_data->drdy_trigger);
93 }
94
95 if (status & TMP007_TOBJ_TH_INT_BITS &&
96 drv_data->th_handler != NULL) {
97 drv_data->th_handler(dev, &drv_data->th_trigger);
98 }
99
100 setup_int(dev, true);
101 }
102
103 #ifdef CONFIG_TMP007_TRIGGER_OWN_THREAD
tmp007_thread(struct tmp007_data * drv_data)104 static void tmp007_thread(struct tmp007_data *drv_data)
105 {
106 while (1) {
107 k_sem_take(&drv_data->gpio_sem, K_FOREVER);
108 tmp007_thread_cb(drv_data->dev);
109 }
110 }
111 #endif
112
113 #ifdef CONFIG_TMP007_TRIGGER_GLOBAL_THREAD
tmp007_work_cb(struct k_work * work)114 static void tmp007_work_cb(struct k_work *work)
115 {
116 struct tmp007_data *drv_data =
117 CONTAINER_OF(work, struct tmp007_data, work);
118
119 tmp007_thread_cb(drv_data->dev);
120 }
121 #endif
122
tmp007_trigger_set(const struct device * dev,const struct sensor_trigger * trig,sensor_trigger_handler_t handler)123 int tmp007_trigger_set(const struct device *dev,
124 const struct sensor_trigger *trig,
125 sensor_trigger_handler_t handler)
126 {
127 struct tmp007_data *drv_data = dev->data;
128
129 setup_int(dev, false);
130
131 if (trig->type == SENSOR_TRIG_DATA_READY) {
132 drv_data->drdy_handler = handler;
133 drv_data->drdy_trigger = *trig;
134 } else if (trig->type == SENSOR_TRIG_THRESHOLD) {
135 drv_data->th_handler = handler;
136 drv_data->th_trigger = *trig;
137 }
138
139 setup_int(dev, true);
140
141 return 0;
142 }
143
tmp007_init_interrupt(const struct device * dev)144 int tmp007_init_interrupt(const struct device *dev)
145 {
146 struct tmp007_data *drv_data = dev->data;
147
148 if (tmp007_reg_update(drv_data, TMP007_REG_CONFIG,
149 TMP007_ALERT_EN_BIT, TMP007_ALERT_EN_BIT) < 0) {
150 LOG_DBG("Failed to enable interrupt pin!");
151 return -EIO;
152 }
153
154 drv_data->dev = dev;
155
156 /* setup gpio interrupt */
157 drv_data->gpio = device_get_binding(DT_INST_GPIO_LABEL(0, int_gpios));
158 if (drv_data->gpio == NULL) {
159 LOG_DBG("Failed to get pointer to %s device!",
160 DT_INST_GPIO_LABEL(0, int_gpios));
161 return -EINVAL;
162 }
163
164 gpio_pin_configure(drv_data->gpio, DT_INST_GPIO_PIN(0, int_gpios),
165 DT_INST_GPIO_FLAGS(0, int_gpios)
166 | GPIO_INT_LEVEL_ACTIVE);
167
168 gpio_init_callback(&drv_data->gpio_cb,
169 tmp007_gpio_callback,
170 BIT(DT_INST_GPIO_PIN(0, int_gpios)));
171
172 if (gpio_add_callback(drv_data->gpio, &drv_data->gpio_cb) < 0) {
173 LOG_DBG("Failed to set gpio callback!");
174 return -EIO;
175 }
176
177 #if defined(CONFIG_TMP007_TRIGGER_OWN_THREAD)
178 k_sem_init(&drv_data->gpio_sem, 0, K_SEM_MAX_LIMIT);
179
180 k_thread_create(&drv_data->thread, drv_data->thread_stack,
181 CONFIG_TMP007_THREAD_STACK_SIZE,
182 (k_thread_entry_t)tmp007_thread, drv_data,
183 NULL, NULL, K_PRIO_COOP(CONFIG_TMP007_THREAD_PRIORITY),
184 0, K_NO_WAIT);
185 #elif defined(CONFIG_TMP007_TRIGGER_GLOBAL_THREAD)
186 drv_data->work.handler = tmp007_work_cb;
187 #endif
188
189 return 0;
190 }
191
