1 /* ST Microelectronics LPS22HH pressure and temperature sensor
2 *
3 * Copyright (c) 2019 STMicroelectronics
4 *
5 * SPDX-License-Identifier: Apache-2.0
6 *
7 * Datasheet:
8 * https://www.st.com/resource/en/datasheet/lps22hh.pdf
9 */
10
11 #define DT_DRV_COMPAT st_lps22hh
12
13 #include <zephyr/kernel.h>
14 #include <zephyr/drivers/sensor.h>
15 #include <zephyr/drivers/gpio.h>
16 #include <zephyr/logging/log.h>
17
18 #include "lps22hh.h"
19
20 LOG_MODULE_DECLARE(LPS22HH, CONFIG_SENSOR_LOG_LEVEL);
21
22 /**
23 * lps22hh_enable_int - enable selected int pin to generate interrupt
24 */
lps22hh_enable_int(const struct device * dev,int enable)25 static int lps22hh_enable_int(const struct device *dev, int enable)
26 {
27 const struct lps22hh_config * const cfg = dev->config;
28 stmdev_ctx_t *ctx = (stmdev_ctx_t *)&cfg->ctx;
29 lps22hh_pin_int_route_t int_route;
30
31 /* set interrupt */
32 lps22hh_pin_int_route_get(ctx, &int_route);
33 int_route.drdy_pres = enable;
34 return lps22hh_pin_int_route_set(ctx, &int_route);
35 }
36
37 /**
38 * lps22hh_trigger_set - link external trigger to event data ready
39 */
lps22hh_trigger_set(const struct device * dev,const struct sensor_trigger * trig,sensor_trigger_handler_t handler)40 int lps22hh_trigger_set(const struct device *dev,
41 const struct sensor_trigger *trig,
42 sensor_trigger_handler_t handler)
43 {
44 struct lps22hh_data *lps22hh = dev->data;
45 const struct lps22hh_config * const cfg = dev->config;
46 stmdev_ctx_t *ctx = (stmdev_ctx_t *)&cfg->ctx;
47 uint32_t raw_press;
48
49 if (trig->chan == SENSOR_CHAN_ALL) {
50 lps22hh->handler_drdy = handler;
51 lps22hh->data_ready_trigger = trig;
52 if (handler) {
53 /* dummy read: re-trigger interrupt */
54 if (lps22hh_pressure_raw_get(ctx, &raw_press) < 0) {
55 LOG_DBG("Failed to read sample");
56 return -EIO;
57 }
58 return lps22hh_enable_int(dev, 1);
59 } else {
60 return lps22hh_enable_int(dev, 0);
61 }
62 }
63
64 return -ENOTSUP;
65 }
66
67 /**
68 * lps22hh_handle_interrupt - handle the drdy event
69 * read data and call handler if registered any
70 */
lps22hh_handle_interrupt(const struct device * dev)71 static void lps22hh_handle_interrupt(const struct device *dev)
72 {
73 int ret;
74 struct lps22hh_data *lps22hh = dev->data;
75 const struct lps22hh_config *cfg = dev->config;
76
77 if (lps22hh->handler_drdy != NULL) {
78 lps22hh->handler_drdy(dev, lps22hh->data_ready_trigger);
79 }
80
81 #if DT_ANY_INST_ON_BUS_STATUS_OKAY(i3c)
82 if (cfg->i3c.bus != NULL) {
83 /*
84 * I3C IBI does not rely on GPIO.
85 * So no need to enable GPIO pin for interrupt trigger.
86 */
87 return;
88 }
89 #endif
90
91 ret = gpio_pin_interrupt_configure_dt(&cfg->gpio_int,
92 GPIO_INT_EDGE_TO_ACTIVE);
93 if (ret < 0) {
94 LOG_ERR("%s: Not able to configure pin_int", dev->name);
95 }
96 }
97
lps22hh_intr_callback(struct lps22hh_data * lps22hh)98 static void lps22hh_intr_callback(struct lps22hh_data *lps22hh)
99 {
100 #if defined(CONFIG_LPS22HH_TRIGGER_OWN_THREAD)
101 k_sem_give(&lps22hh->intr_sem);
102 #elif defined(CONFIG_LPS22HH_TRIGGER_GLOBAL_THREAD)
103 k_work_submit(&lps22hh->work);
104 #endif /* CONFIG_LPS22HH_TRIGGER_OWN_THREAD */
105 }
106
lps22hh_gpio_callback(const struct device * dev,struct gpio_callback * cb,uint32_t pins)107 static void lps22hh_gpio_callback(const struct device *dev,
108 struct gpio_callback *cb, uint32_t pins)
109 {
110 struct lps22hh_data *lps22hh =
111 CONTAINER_OF(cb, struct lps22hh_data, gpio_cb);
112
113 ARG_UNUSED(pins);
114 const struct lps22hh_config *cfg = lps22hh->dev->config;
115 int ret;
116
117 ret = gpio_pin_interrupt_configure_dt(&cfg->gpio_int, GPIO_INT_DISABLE);
118 if (ret < 0) {
119 LOG_ERR("%s: Not able to configure pin_int", dev->name);
120 }
121
122 lps22hh_intr_callback(lps22hh);
123 }
124
125 #ifdef CONFIG_LPS22HH_TRIGGER_OWN_THREAD
lps22hh_thread(struct lps22hh_data * lps22hh)126 static void lps22hh_thread(struct lps22hh_data *lps22hh)
127 {
128 while (1) {
129 k_sem_take(&lps22hh->intr_sem, K_FOREVER);
130 lps22hh_handle_interrupt(lps22hh->dev);
131 }
132 }
133 #endif /* CONFIG_LPS22HH_TRIGGER_OWN_THREAD */
134
135 #ifdef CONFIG_LPS22HH_TRIGGER_GLOBAL_THREAD
lps22hh_work_cb(struct k_work * work)136 static void lps22hh_work_cb(struct k_work *work)
137 {
138 struct lps22hh_data *lps22hh =
139 CONTAINER_OF(work, struct lps22hh_data, work);
140
141 lps22hh_handle_interrupt(lps22hh->dev);
142 }
143 #endif /* CONFIG_LPS22HH_TRIGGER_GLOBAL_THREAD */
144
145 #if DT_ANY_INST_ON_BUS_STATUS_OKAY(i3c)
lps22hh_ibi_cb(struct i3c_device_desc * target,struct i3c_ibi_payload * payload)146 static int lps22hh_ibi_cb(struct i3c_device_desc *target,
147 struct i3c_ibi_payload *payload)
148 {
149 const struct device *dev = target->dev;
150 struct lps22hh_data *lps22hh = dev->data;
151
152 ARG_UNUSED(payload);
153
154 lps22hh_intr_callback(lps22hh);
155
156 return 0;
157 }
158 #endif
159
lps22hh_init_interrupt(const struct device * dev)160 int lps22hh_init_interrupt(const struct device *dev)
161 {
162 struct lps22hh_data *lps22hh = dev->data;
163 const struct lps22hh_config *cfg = dev->config;
164 stmdev_ctx_t *ctx = (stmdev_ctx_t *)&cfg->ctx;
165 int ret;
166
167 /* setup data ready gpio interrupt */
168 if (!gpio_is_ready_dt(&cfg->gpio_int)
169 #if DT_ANY_INST_ON_BUS_STATUS_OKAY(i3c)
170 && (cfg->i3c.bus == NULL)
171 #endif
172 ) {
173 if (cfg->gpio_int.port) {
174 LOG_ERR("%s: device %s is not ready", dev->name,
175 cfg->gpio_int.port->name);
176 return -ENODEV;
177 }
178
179 LOG_DBG("%s: gpio_int not defined in DT", dev->name);
180 return 0;
181 }
182
183 lps22hh->dev = dev;
184
185 #if defined(CONFIG_LPS22HH_TRIGGER_OWN_THREAD)
186 k_sem_init(&lps22hh->intr_sem, 0, K_SEM_MAX_LIMIT);
187
188 k_thread_create(&lps22hh->thread, lps22hh->thread_stack,
189 CONFIG_LPS22HH_THREAD_STACK_SIZE,
190 (k_thread_entry_t)lps22hh_thread, lps22hh,
191 NULL, NULL, K_PRIO_COOP(CONFIG_LPS22HH_THREAD_PRIORITY),
192 0, K_NO_WAIT);
193 #elif defined(CONFIG_LPS22HH_TRIGGER_GLOBAL_THREAD)
194 lps22hh->work.handler = lps22hh_work_cb;
195 #endif /* CONFIG_LPS22HH_TRIGGER_OWN_THREAD */
196
197 #if DT_ANY_INST_ON_BUS_STATUS_OKAY(i3c)
198 if (cfg->i3c.bus == NULL)
199 #endif
200 {
201 ret = gpio_pin_configure_dt(&cfg->gpio_int, GPIO_INPUT);
202 if (ret < 0) {
203 LOG_ERR("Could not configure gpio");
204 return ret;
205 }
206
207 LOG_INF("%s: int on %s.%02u", dev->name, cfg->gpio_int.port->name,
208 cfg->gpio_int.pin);
209
210 gpio_init_callback(&lps22hh->gpio_cb,
211 lps22hh_gpio_callback,
212 BIT(cfg->gpio_int.pin));
213
214 ret = gpio_add_callback(cfg->gpio_int.port, &lps22hh->gpio_cb);
215 if (ret < 0) {
216 LOG_ERR("Could not set gpio callback");
217 return ret;
218 }
219 }
220
221 /* enable interrupt in pulse mode */
222 if (lps22hh_int_notification_set(ctx, LPS22HH_INT_PULSED) < 0) {
223 return -EIO;
224 }
225
226 #if DT_ANY_INST_ON_BUS_STATUS_OKAY(i3c)
227 if (cfg->i3c.bus != NULL) {
228 /* I3C IBI does not utilize GPIO interrupt. */
229 lps22hh->i3c_dev->ibi_cb = lps22hh_ibi_cb;
230
231 if (i3c_ibi_enable(lps22hh->i3c_dev) != 0) {
232 LOG_DBG("Could not enable I3C IBI");
233 return -EIO;
234 }
235
236 return 0;
237 }
238 #endif
239
240 return gpio_pin_interrupt_configure_dt(&cfg->gpio_int,
241 GPIO_INT_EDGE_TO_ACTIVE);
242 }
243
