sensor: akm09918c: Use RTIO workq on akm09918c_submit

To make its execution path non-blocking from the caller's perspective.

Signed-off-by: Luis Ubieda <[email protected]>

Author: ubieda

drivers/sensor/asahi_kasei/akm09918c/Kconfig

@@ -1,11 +1,13 @@
 # Copyright (c) 2023 Google LLC
+# Copyright (c) 2024 Croxel Inc.
 # SPDX-License-Identifier: Apache-2.0
 
 config AKM09918C
 	bool "AKM09918C Magnetometer"
 	default y
 	depends on DT_HAS_ASAHI_KASEI_AKM09918C_ENABLED
 	select I2C
+	select RTIO_WORKQ if SENSOR_ASYNC_API
 	help
 	  Enable driver for AK8975 magnetometer.
 

drivers/sensor/asahi_kasei/akm09918c/akm09918c_async.c

@@ -1,16 +1,21 @@
 /*
  * Copyright (c) 2023 Google LLC
+ * Copyright (c) 2024 Croxel Inc.
+ *
  * SPDX-License-Identifier: Apache-2.0
  */
 
 #include <zephyr/logging/log.h>
+#include <zephyr/rtio/work.h>
 
 #include "akm09918c.h"
 
 LOG_MODULE_DECLARE(AKM09918C, CONFIG_SENSOR_LOG_LEVEL);
 
-void akm09918c_submit(const struct device *dev, struct rtio_iodev_sqe *iodev_sqe)
+void akm09918c_submit_sync(struct rtio_iodev_sqe *iodev_sqe)
 {
+	const struct sensor_read_config *cfg = iodev_sqe->sqe.iodev->data;
+	const struct device *dev = cfg->sensor;
 	uint32_t min_buf_len = sizeof(struct akm09918c_encoded_data);
 	int rc;
 	uint8_t *buf;
@@ -38,3 +43,12 @@ void akm09918c_submit(const struct device *dev, struct rtio_iodev_sqe *iodev_sqe
 
 	rtio_iodev_sqe_ok(iodev_sqe, 0);
 }
+
+void akm09918c_submit(const struct device *dev, struct rtio_iodev_sqe *iodev_sqe)
+{
+	struct rtio_work_req *req = rtio_work_req_alloc();
+
+	__ASSERT_NO_MSG(req);
+
+	rtio_work_req_submit(req, iodev_sqe, akm09918c_submit_sync);
+}