Initial commit

drivers/sensor/example_sensor/CMakeLists.txt

@@ -0,0 +1,5 @@
+# Copyright (c) 2021 Nordic Semiconductor ASA
+# SPDX-License-Identifier: Apache-2.0
+
+zephyr_library()
+zephyr_library_sources(example_sensor.c)

drivers/sensor/example_sensor/Kconfig

@@ -0,0 +1,10 @@
+# Copyright (c) 2021 Nordic Semiconductor ASA
+# SPDX-License-Identifier: Apache-2.0
+
+config EXAMPLE_SENSOR
+	bool "Example sensor"
+	default y
+	depends on DT_HAS_ZEPHYR_EXAMPLE_SENSOR_ENABLED
+	select GPIO
+	help
+	  Enable example sensor

drivers/sensor/example_sensor/example_sensor.c

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+/*
+ * Copyright (c) 2021 Nordic Semiconductor ASA
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+#define DT_DRV_COMPAT zephyr_example_sensor
+
+#include <zephyr/device.h>
+#include <zephyr/drivers/gpio.h>
+#include <zephyr/drivers/sensor.h>
+
+#include <zephyr/logging/log.h>
+LOG_MODULE_REGISTER(example_sensor, CONFIG_SENSOR_LOG_LEVEL);
+
+struct example_sensor_data {
+	int state;
+};
+
+struct example_sensor_config {
+	struct gpio_dt_spec input;
+};
+
+static int example_sensor_sample_fetch(const struct device *dev,
+				      enum sensor_channel chan)
+{
+	const struct example_sensor_config *config = dev->config;
+	struct example_sensor_data *data = dev->data;
+
+	data->state = gpio_pin_get_dt(&config->input);
+
+	return 0;
+}
+
+static int example_sensor_channel_get(const struct device *dev,
+				     enum sensor_channel chan,
+				     struct sensor_value *val)
+{
+	struct example_sensor_data *data = dev->data;
+
+	if (chan != SENSOR_CHAN_PROX) {
+		return -ENOTSUP;
+	}
+
+	val->val1 = data->state;
+
+	return 0;
+}
+
+static const struct sensor_driver_api example_sensor_api = {
+	.sample_fetch = &example_sensor_sample_fetch,
+	.channel_get = &example_sensor_channel_get,
+};
+
+static int example_sensor_init(const struct device *dev)
+{
+	const struct example_sensor_config *config = dev->config;
+
+	int ret;
+
+	if (!device_is_ready(config->input.port)) {
+		LOG_ERR("Input GPIO not ready");
+		return -ENODEV;
+	}
+
+	ret = gpio_pin_configure_dt(&config->input, GPIO_INPUT);
+	if (ret < 0) {
+		LOG_ERR("Could not configure input GPIO (%d)", ret);
+		return ret;
+	}
+
+	return 0;
+}
+
+#define EXAMPLE_SENSOR_INIT(i)						       \
+	static struct example_sensor_data example_sensor_data_##i;	       \
+									       \
+	static const struct example_sensor_config example_sensor_config_##i = {\
+		.input = GPIO_DT_SPEC_INST_GET(i, input_gpios),		       \
+	};								       \
+									       \
+	DEVICE_DT_INST_DEFINE(i, example_sensor_init, NULL,		       \
+			      &example_sensor_data_##i,			       \
+			      &example_sensor_config_##i, POST_KERNEL,	       \
+			      CONFIG_SENSOR_INIT_PRIORITY, &example_sensor_api);
+
+DT_INST_FOREACH_STATUS_OKAY(EXAMPLE_SENSOR_INIT)