Loading...
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 | /* ST Microelectronics IIS2ICLX 2-axis accelerometer sensor driver * * Copyright (c) 2020 STMicroelectronics * * SPDX-License-Identifier: Apache-2.0 * * Datasheet: * https://www.st.com/resource/en/datasheet/iis2iclx.pdf */ #define DT_DRV_COMPAT st_iis2iclx #include <zephyr/kernel.h> #include <zephyr/drivers/sensor.h> #include <zephyr/drivers/gpio.h> #include <zephyr/logging/log.h> #include "iis2iclx.h" LOG_MODULE_DECLARE(IIS2ICLX, CONFIG_SENSOR_LOG_LEVEL); #if defined(CONFIG_IIS2ICLX_ENABLE_TEMP) /** * iis2iclx_enable_t_int - TEMP enable selected int pin to generate interrupt */ static int iis2iclx_enable_t_int(const struct device *dev, int enable) { const struct iis2iclx_config *cfg = dev->config; iis2iclx_pin_int2_route_t int2_route; if (enable) { int16_t buf; /* dummy read: re-trigger interrupt */ iis2iclx_temperature_raw_get((stmdev_ctx_t *)&cfg->ctx, &buf); } /* set interrupt (TEMP DRDY interrupt is only on INT2) */ if (cfg->int_pin == 1) return -EIO; iis2iclx_read_reg((stmdev_ctx_t *)&cfg->ctx, IIS2ICLX_INT2_CTRL, (uint8_t *)&int2_route.int2_ctrl, 1); int2_route.int2_ctrl.int2_drdy_temp = enable; return iis2iclx_write_reg((stmdev_ctx_t *)&cfg->ctx, IIS2ICLX_INT2_CTRL, (uint8_t *)&int2_route.int2_ctrl, 1); } #endif /** * iis2iclx_enable_xl_int - XL enable selected int pin to generate interrupt */ static int iis2iclx_enable_xl_int(const struct device *dev, int enable) { const struct iis2iclx_config *cfg = dev->config; if (enable) { int16_t buf[3]; /* dummy read: re-trigger interrupt */ iis2iclx_acceleration_raw_get((stmdev_ctx_t *)&cfg->ctx, buf); } /* set interrupt */ if (cfg->int_pin == 1) { iis2iclx_pin_int1_route_t int1_route; iis2iclx_read_reg((stmdev_ctx_t *)&cfg->ctx, IIS2ICLX_INT1_CTRL, (uint8_t *)&int1_route.int1_ctrl, 1); int1_route.int1_ctrl.int1_drdy_xl = enable; return iis2iclx_write_reg((stmdev_ctx_t *)&cfg->ctx, IIS2ICLX_INT1_CTRL, (uint8_t *)&int1_route.int1_ctrl, 1); } else { iis2iclx_pin_int2_route_t int2_route; iis2iclx_read_reg((stmdev_ctx_t *)&cfg->ctx, IIS2ICLX_INT2_CTRL, (uint8_t *)&int2_route.int2_ctrl, 1); int2_route.int2_ctrl.int2_drdy_xl = enable; return iis2iclx_write_reg((stmdev_ctx_t *)&cfg->ctx, IIS2ICLX_INT2_CTRL, (uint8_t *)&int2_route.int2_ctrl, 1); } } /** * iis2iclx_trigger_set - link external trigger to event data ready */ int iis2iclx_trigger_set(const struct device *dev, const struct sensor_trigger *trig, sensor_trigger_handler_t handler) { const struct iis2iclx_config *cfg = dev->config; struct iis2iclx_data *iis2iclx = dev->data; if (!cfg->trig_enabled) { LOG_ERR("trigger_set op not supported"); return -ENOTSUP; } if (trig->chan == SENSOR_CHAN_ACCEL_XYZ) { iis2iclx->handler_drdy_acc = handler; if (handler) { return iis2iclx_enable_xl_int(dev, IIS2ICLX_EN_BIT); } else { return iis2iclx_enable_xl_int(dev, IIS2ICLX_DIS_BIT); } } #if defined(CONFIG_IIS2ICLX_ENABLE_TEMP) else if (trig->chan == SENSOR_CHAN_DIE_TEMP) { iis2iclx->handler_drdy_temp = handler; if (handler) { return iis2iclx_enable_t_int(dev, IIS2ICLX_EN_BIT); } else { return iis2iclx_enable_t_int(dev, IIS2ICLX_DIS_BIT); } } #endif return -ENOTSUP; } /** * iis2iclx_handle_interrupt - handle the drdy event * read data and call handler if registered any */ static void iis2iclx_handle_interrupt(const struct device *dev) { struct iis2iclx_data *iis2iclx = dev->data; struct sensor_trigger drdy_trigger = { .type = SENSOR_TRIG_DATA_READY, }; const struct iis2iclx_config *cfg = dev->config; iis2iclx_status_reg_t status; while (1) { if (iis2iclx_status_reg_get((stmdev_ctx_t *)&cfg->ctx, &status) < 0) { LOG_DBG("failed reading status reg"); return; } if (status.xlda == 0 #if defined(CONFIG_IIS2ICLX_ENABLE_TEMP) && status.tda == 0 #endif ) { break; } if ((status.xlda) && (iis2iclx->handler_drdy_acc != NULL)) { iis2iclx->handler_drdy_acc(dev, &drdy_trigger); } #if defined(CONFIG_IIS2ICLX_ENABLE_TEMP) if ((status.tda) && (iis2iclx->handler_drdy_temp != NULL)) { iis2iclx->handler_drdy_temp(dev, &drdy_trigger); } #endif } gpio_pin_interrupt_configure_dt(&cfg->gpio_drdy, GPIO_INT_EDGE_TO_ACTIVE); } static void iis2iclx_gpio_callback(const struct device *dev, struct gpio_callback *cb, uint32_t pins) { struct iis2iclx_data *iis2iclx = CONTAINER_OF(cb, struct iis2iclx_data, gpio_cb); const struct iis2iclx_config *cfg = iis2iclx->dev->config; ARG_UNUSED(pins); gpio_pin_interrupt_configure_dt(&cfg->gpio_drdy, GPIO_INT_DISABLE); #if defined(CONFIG_IIS2ICLX_TRIGGER_OWN_THREAD) k_sem_give(&iis2iclx->gpio_sem); #elif defined(CONFIG_IIS2ICLX_TRIGGER_GLOBAL_THREAD) k_work_submit(&iis2iclx->work); #endif /* CONFIG_IIS2ICLX_TRIGGER_OWN_THREAD */ } #ifdef CONFIG_IIS2ICLX_TRIGGER_OWN_THREAD static void iis2iclx_thread(struct iis2iclx_data *iis2iclx) { while (1) { k_sem_take(&iis2iclx->gpio_sem, K_FOREVER); iis2iclx_handle_interrupt(iis2iclx->dev); } } #endif /* CONFIG_IIS2ICLX_TRIGGER_OWN_THREAD */ #ifdef CONFIG_IIS2ICLX_TRIGGER_GLOBAL_THREAD static void iis2iclx_work_cb(struct k_work *work) { struct iis2iclx_data *iis2iclx = CONTAINER_OF(work, struct iis2iclx_data, work); iis2iclx_handle_interrupt(iis2iclx->dev); } #endif /* CONFIG_IIS2ICLX_TRIGGER_GLOBAL_THREAD */ int iis2iclx_init_interrupt(const struct device *dev) { struct iis2iclx_data *iis2iclx = dev->data; const struct iis2iclx_config *cfg = dev->config; int ret; /* setup data ready gpio interrupt (INT1 or INT2) */ if (!device_is_ready(cfg->gpio_drdy.port)) { LOG_ERR("Cannot get pointer to drdy_gpio device"); return -EINVAL; } #if defined(CONFIG_IIS2ICLX_TRIGGER_OWN_THREAD) k_sem_init(&iis2iclx->gpio_sem, 0, K_SEM_MAX_LIMIT); k_thread_create(&iis2iclx->thread, iis2iclx->thread_stack, CONFIG_IIS2ICLX_THREAD_STACK_SIZE, (k_thread_entry_t)iis2iclx_thread, iis2iclx, NULL, NULL, K_PRIO_COOP(CONFIG_IIS2ICLX_THREAD_PRIORITY), 0, K_NO_WAIT); #elif defined(CONFIG_IIS2ICLX_TRIGGER_GLOBAL_THREAD) iis2iclx->work.handler = iis2iclx_work_cb; #endif /* CONFIG_IIS2ICLX_TRIGGER_OWN_THREAD */ ret = gpio_pin_configure_dt(&cfg->gpio_drdy, GPIO_INPUT); if (ret < 0) { LOG_ERR("Could not configure gpio"); return ret; } gpio_init_callback(&iis2iclx->gpio_cb, iis2iclx_gpio_callback, BIT(cfg->gpio_drdy.pin)); if (gpio_add_callback(cfg->gpio_drdy.port, &iis2iclx->gpio_cb) < 0) { LOG_ERR("Could not set gpio callback"); return -EIO; } /* enable interrupt on int1/int2 in pulse mode */ if (iis2iclx_int_notification_set((stmdev_ctx_t *)&cfg->ctx, IIS2ICLX_ALL_INT_PULSED) < 0) { LOG_ERR("Could not set pulse mode"); return -EIO; } if (gpio_pin_interrupt_configure_dt(&cfg->gpio_drdy, GPIO_INT_EDGE_TO_ACTIVE) < 0) { LOG_ERR("Could not configure interrupt"); return -EIO; } return 0; } |