sensor: adxl345: Prevent clearing SQE flags set while prepping SQEs

SQE flags are adjusted when preparing write/read ops, therefore an OR
operation is required.

Signed-off-by: Luis Ubieda <luisf@croxel.com>

Author: ubieda

drivers/sensor/adi/adxl345/adxl345_stream.c

@@ -211,7 +211,7 @@ static void adxl345_process_fifo_samples_cb(struct rtio *r, const struct rtio_sq
 
 		rtio_sqe_prep_tiny_write(write_fifo_addr, data->iodev, RTIO_PRIO_NORM, &reg_addr,
 								1, NULL);
-		write_fifo_addr->flags = RTIO_SQE_TRANSACTION;
+		write_fifo_addr->flags |= RTIO_SQE_TRANSACTION;
 		rtio_sqe_prep_read(read_fifo_data, data->iodev, RTIO_PRIO_NORM,
 							read_buf + data->fifo_total_bytes,
 							SAMPLE_SIZE, current_sqe);
@@ -222,7 +222,7 @@ static void adxl345_process_fifo_samples_cb(struct rtio *r, const struct rtio_sq
 		if (i == fifo_samples-1) {
 			struct rtio_sqe *complete_op = rtio_sqe_acquire(data->rtio_ctx);
 
-			read_fifo_data->flags = RTIO_SQE_CHAINED;
+			read_fifo_data->flags |= RTIO_SQE_CHAINED;
 			rtio_sqe_prep_callback(complete_op, adxl345_fifo_read_cb, (void *)dev,
 				current_sqe);
 		}
@@ -341,10 +341,10 @@ static void adxl345_process_status1_cb(struct rtio *r, const struct rtio_sqe *sq
 	const uint8_t reg_addr = ADXL345_REG_READ(ADXL345_FIFO_STATUS_REG);
 
 	rtio_sqe_prep_tiny_write(write_fifo_addr, data->iodev, RTIO_PRIO_NORM, &reg_addr, 1, NULL);
-	write_fifo_addr->flags = RTIO_SQE_TRANSACTION;
+	write_fifo_addr->flags |= RTIO_SQE_TRANSACTION;
 	rtio_sqe_prep_read(read_fifo_data, data->iodev, RTIO_PRIO_NORM, data->fifo_ent, 1,
 						current_sqe);
-	read_fifo_data->flags = RTIO_SQE_CHAINED;
+	read_fifo_data->flags |= RTIO_SQE_CHAINED;
 	if (cfg->bus_type == ADXL345_BUS_I2C) {
 		read_fifo_data->iodev_flags |= RTIO_IODEV_I2C_STOP | RTIO_IODEV_I2C_RESTART;
 	}
@@ -379,9 +379,9 @@ void adxl345_stream_irq_handler(const struct device *dev)
 	uint8_t reg = ADXL345_REG_READ(ADXL345_INT_SOURCE);
 
 	rtio_sqe_prep_tiny_write(write_status_addr, data->iodev, RTIO_PRIO_NORM, &reg, 1, NULL);
-	write_status_addr->flags = RTIO_SQE_TRANSACTION;
+	write_status_addr->flags |= RTIO_SQE_TRANSACTION;
 	rtio_sqe_prep_read(read_status_reg, data->iodev, RTIO_PRIO_NORM, &data->status1, 1, NULL);
-	read_status_reg->flags = RTIO_SQE_CHAINED;
+	read_status_reg->flags |= RTIO_SQE_CHAINED;
 
 	if (cfg->bus_type == ADXL345_BUS_I2C) {
 		read_status_reg->iodev_flags |= RTIO_IODEV_I2C_STOP | RTIO_IODEV_I2C_RESTART;