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| 1 | +/* |
| 2 | + * Copyright (c) 2025 Bang & Olufsen A/S |
| 3 | + * |
| 4 | + * SPDX-License-Identifier: Apache-2.0 |
| 5 | + */ |
| 6 | + |
| 7 | +#define DT_DRV_COMPAT ti_opt3001 |
| 8 | + |
| 9 | +#include "opt3001.h" |
| 10 | + |
| 11 | +#include <zephyr/device.h> |
| 12 | +#include <zephyr/drivers/gpio.h> |
| 13 | +#include <zephyr/drivers/i2c.h> |
| 14 | +#include <zephyr/drivers/sensor.h> |
| 15 | +#include <zephyr/kernel.h> |
| 16 | +#include <zephyr/logging/log.h> |
| 17 | +#include <zephyr/sys/util.h> |
| 18 | + |
| 19 | +LOG_MODULE_DECLARE(opt3001, CONFIG_SENSOR_LOG_LEVEL); |
| 20 | + |
| 21 | +static void opt3001_thread_cb(const struct device *dev) |
| 22 | +{ |
| 23 | + const struct opt3001_config *cfg = dev->config; |
| 24 | + struct opt3001_data *dat = dev->data; |
| 25 | + uint16_t reg_cfg; |
| 26 | + int ret; |
| 27 | + |
| 28 | + /* read result then clear interrupt by reading REG_CONFIG */ |
| 29 | + ret = opt3001_reg_read(dat->dev, OPT3001_REG_RESULT, &dat->sample); |
| 30 | + if (ret) { |
| 31 | + LOG_ERR("Failed to read result, ret: %d", ret); |
| 32 | + return; |
| 33 | + } |
| 34 | + |
| 35 | + ret = opt3001_reg_read(dat->dev, OPT3001_REG_CONFIG, ®_cfg); |
| 36 | + if (ret) { |
| 37 | + LOG_ERR("Failed to read config, ret: %d", ret); |
| 38 | + return; |
| 39 | + } |
| 40 | + |
| 41 | + ret = k_mutex_lock(&dat->handler_mutex, K_FOREVER); |
| 42 | + if (ret) { |
| 43 | + LOG_ERR("Failed to lock trigger mutex, ret: %d", ret); |
| 44 | + return; |
| 45 | + } |
| 46 | + |
| 47 | + if (dat->handler) { |
| 48 | + dat->handler(dat->dev, dat->trigger); |
| 49 | + } |
| 50 | + |
| 51 | + /* recheck handler in case it was removed during the handler invocation */ |
| 52 | + if (dat->handler) { |
| 53 | + /* enable interrupt again */ |
| 54 | + gpio_pin_interrupt_configure_dt(&cfg->gpio_int, GPIO_INT_EDGE_TO_ACTIVE); |
| 55 | + } |
| 56 | + |
| 57 | + ret = k_mutex_unlock(&dat->handler_mutex); |
| 58 | + if (ret) { |
| 59 | + LOG_ERR("Failed to unlock trigger mutex, ret: %d", ret); |
| 60 | + } |
| 61 | +} |
| 62 | + |
| 63 | +static void opt3001_isr(const struct device *dev, struct gpio_callback *gpio_cb, uint32_t pins) |
| 64 | +{ |
| 65 | + struct opt3001_data *dat = CONTAINER_OF(gpio_cb, struct opt3001_data, gpio_cb_int); |
| 66 | + const struct opt3001_config *cfg = dat->dev->config; |
| 67 | + |
| 68 | + ARG_UNUSED(pins); |
| 69 | + |
| 70 | + /* disable interrupt from gpio during handling */ |
| 71 | + gpio_pin_interrupt_configure_dt(&cfg->gpio_int, GPIO_INT_DISABLE); |
| 72 | + |
| 73 | +#if defined(CONFIG_OPT3001_TRIGGER_OWN_THREAD) |
| 74 | + k_sem_give(&dat->gpio_sem); |
| 75 | +#elif defined(CONFIG_OPT3001_TRIGGER_GLOBAL_THREAD) |
| 76 | + k_work_submit(&dat->work_int); |
| 77 | +#endif |
| 78 | +} |
| 79 | + |
| 80 | +#ifdef CONFIG_OPT3001_TRIGGER_OWN_THREAD |
| 81 | +static void opt3001_thread(void *p1, void *p2, void *p3) |
| 82 | +{ |
| 83 | + ARG_UNUSED(p2); |
| 84 | + ARG_UNUSED(p3); |
| 85 | + |
| 86 | + struct opt3001_data *dat = p1; |
| 87 | + |
| 88 | + while (1) { |
| 89 | + k_sem_take(&dat->gpio_sem, K_FOREVER); |
| 90 | + opt3001_thread_cb(dat->dev); |
| 91 | + } |
| 92 | +} |
| 93 | +#endif |
| 94 | + |
| 95 | +#ifdef CONFIG_OPT3001_TRIGGER_GLOBAL_THREAD |
| 96 | +static void opt3001_int_work(struct k_work *work) |
| 97 | +{ |
| 98 | + struct opt3001_data *dat = CONTAINER_OF(work, struct opt3001_data, work_int); |
| 99 | + |
| 100 | + opt3001_thread_cb(dat->dev); |
| 101 | +} |
| 102 | +#endif |
| 103 | + |
| 104 | +int opt3001_init_interrupt(const struct device *dev) |
| 105 | +{ |
| 106 | + const struct opt3001_config *cfg = dev->config; |
| 107 | + struct opt3001_data *dat = dev->data; |
| 108 | + int ret = 0; |
| 109 | + |
| 110 | + /* setup interrupt if provided */ |
| 111 | + if (!cfg->gpio_int.port) { |
| 112 | + LOG_DBG("int-gpios not provided, continuing without support for trigger"); |
| 113 | + return 0; |
| 114 | + } |
| 115 | + |
| 116 | + dat->dev = dev; |
| 117 | + |
| 118 | + if (!gpio_is_ready_dt(&cfg->gpio_int)) { |
| 119 | + LOG_ERR("Interrupt gpio not ready"); |
| 120 | + return -ENODEV; |
| 121 | + } |
| 122 | + |
| 123 | + ret = k_mutex_init(&dat->handler_mutex); |
| 124 | + if (ret) { |
| 125 | + LOG_ERR("Failed to init trigger mutex, ret: %d", ret); |
| 126 | + return ret; |
| 127 | + } |
| 128 | + |
| 129 | + ret = gpio_pin_configure_dt(&cfg->gpio_int, GPIO_INPUT); |
| 130 | + if (ret) { |
| 131 | + LOG_ERR("Failed to configure int-gpios, ret: %d", ret); |
| 132 | + return ret; |
| 133 | + } |
| 134 | + |
| 135 | + ret = gpio_pin_interrupt_configure_dt(&cfg->gpio_int, GPIO_INT_DISABLE); |
| 136 | + if (ret) { |
| 137 | + LOG_ERR("Failed to enable interrupt on int-gpios, ret: %d", ret); |
| 138 | + return ret; |
| 139 | + } |
| 140 | + |
| 141 | + gpio_init_callback(&dat->gpio_cb_int, opt3001_isr, BIT(cfg->gpio_int.pin)); |
| 142 | + |
| 143 | + ret = gpio_add_callback(cfg->gpio_int.port, &dat->gpio_cb_int); |
| 144 | + if (ret) { |
| 145 | + LOG_ERR("Failed to add callback to int-gpios, ret: %d", ret); |
| 146 | + return ret; |
| 147 | + } |
| 148 | + |
| 149 | +#if defined(CONFIG_OPT3001_TRIGGER_OWN_THREAD) |
| 150 | + k_sem_init(&dat->gpio_sem, 0, K_SEM_MAX_LIMIT); |
| 151 | + k_thread_create(&dat->thread, dat->thread_stack, CONFIG_OPT3001_THREAD_STACK_SIZE, |
| 152 | + opt3001_thread, dat, NULL, NULL, |
| 153 | + K_PRIO_COOP(CONFIG_OPT3001_THREAD_PRIORITY), 0, K_NO_WAIT); |
| 154 | + k_thread_name_set(&dat->thread, "opt3001_trigger"); |
| 155 | + |
| 156 | +#elif defined(CONFIG_OPT3001_TRIGGER_GLOBAL_THREAD) |
| 157 | + k_work_init(&dat->work_int, opt3001_int_work); |
| 158 | +#endif |
| 159 | + |
| 160 | + return 0; |
| 161 | +} |
| 162 | + |
| 163 | +int opt3001_trigger_set(const struct device *dev, const struct sensor_trigger *trig, |
| 164 | + sensor_trigger_handler_t handler) |
| 165 | +{ |
| 166 | + const struct opt3001_config *cfg = dev->config; |
| 167 | + struct opt3001_data *dat = dev->data; |
| 168 | + uint16_t reg_cfg; |
| 169 | + int ret; |
| 170 | + |
| 171 | + /* only allow trigger on a device with int-gpios specified */ |
| 172 | + if (!cfg->gpio_int.port) { |
| 173 | + return -ENOSYS; |
| 174 | + } |
| 175 | + |
| 176 | + if (trig->chan != SENSOR_CHAN_LIGHT) { |
| 177 | + return -EINVAL; |
| 178 | + } |
| 179 | + |
| 180 | + if (trig->type != SENSOR_TRIG_DATA_READY) { |
| 181 | + return -EINVAL; |
| 182 | + } |
| 183 | + |
| 184 | + ret = k_mutex_lock(&dat->handler_mutex, K_FOREVER); |
| 185 | + if (ret) { |
| 186 | + LOG_ERR("Failed to lock trigger mutex, ret: %d", ret); |
| 187 | + return ret; |
| 188 | + } |
| 189 | + |
| 190 | + dat->trigger = trig; |
| 191 | + dat->handler = handler; |
| 192 | + |
| 193 | + ret = gpio_pin_interrupt_configure_dt(&cfg->gpio_int, |
| 194 | + handler ? GPIO_INT_EDGE_TO_ACTIVE : GPIO_INT_DISABLE); |
| 195 | + if (ret) { |
| 196 | + LOG_ERR("Failed to configure gpio interrupt, ret: %d", ret); |
| 197 | + return ret; |
| 198 | + } |
| 199 | + |
| 200 | + /* enable/disable interrupt on every conversion */ |
| 201 | + ret = opt3001_reg_update(dev, OPT3001_REG_LOW_LIMIT, OPT3001_LIMIT_EXPONENT_MASK, |
| 202 | + handler ? OPT3001_LIMIT_EXPONENT_MASK |
| 203 | + : OPT3001_LIMIT_EXPONENT_DEFAULT); |
| 204 | + if (ret) { |
| 205 | + LOG_ERR("Failed to enable interrupt on conversions, ret: %d", ret); |
| 206 | + return ret; |
| 207 | + } |
| 208 | + |
| 209 | + /* clear any asserted interrupt by reading REG_CONFIG */ |
| 210 | + ret = opt3001_reg_read(dat->dev, OPT3001_REG_CONFIG, ®_cfg); |
| 211 | + if (ret) { |
| 212 | + LOG_ERR("Failed to read config, ret: %d", ret); |
| 213 | + return ret; |
| 214 | + } |
| 215 | + |
| 216 | + ret = k_mutex_unlock(&dat->handler_mutex); |
| 217 | + if (ret) { |
| 218 | + LOG_ERR("Failed to unlock trigger mutex, ret: %d", ret); |
| 219 | + return ret; |
| 220 | + } |
| 221 | + |
| 222 | + return 0; |
| 223 | +} |
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