spi_mcux_lpspi: Move RTIO code to rtio functions

To facilitate changing this driver, decouple rtio from functions not
specific to RTIO. This also requires moving the sdk driver handle
creation outside of the configure call. An effect of this is we can
stop initializing an unused sdk driver handle for the dma path.

Signed-off-by: Declan Snyder <[email protected]>

Author: decsny

drivers/spi/spi_mcux_lpspi.c

@@ -91,9 +91,6 @@ struct spi_mcux_data {
 };
 
 static int spi_mcux_transfer_next_packet(const struct device *dev);
-#ifdef CONFIG_SPI_RTIO
-static void spi_mcux_iodev_complete(const struct device *dev, int status);
-#endif
 
 static void spi_mcux_isr(const struct device *dev)
 {
@@ -108,14 +105,6 @@ static void spi_mcux_master_callback(LPSPI_Type *base, lpspi_master_handle_t *ha
 {
 	struct spi_mcux_data *data = userData;
 
-#ifdef CONFIG_SPI_RTIO
-	struct spi_rtio *rtio_ctx = data->rtio_ctx;
-
-	if (rtio_ctx->txn_head != NULL) {
-		spi_mcux_iodev_complete(data->dev, status);
-		return;
-	}
-#endif
 	spi_context_update_tx(&data->ctx, 1, data->transfer_len);
 	spi_context_update_rx(&data->ctx, 1, data->transfer_len);
 
@@ -226,7 +215,6 @@ static int spi_mcux_configure(const struct device *dev, const struct spi_config
 	master_config.pinCfg = config->data_pin_config;
 
 	LPSPI_MasterInit(base, &master_config, clock_freq);
-	LPSPI_MasterTransferCreateHandle(base, &data->handle, spi_mcux_master_callback, data);
 	LPSPI_SetDummyData(base, 0);
 
 	if (IS_ENABLED(CONFIG_DEBUG)) {
@@ -537,6 +525,22 @@ static int transceive_dma(const struct device *dev, const struct spi_config *spi
 #endif /* CONFIG_SPI_MCUX_LPSPI_DMA */
 
 #ifdef CONFIG_SPI_RTIO
+static void spi_mcux_iodev_complete(const struct device *dev, int status);
+
+static void spi_mcux_master_rtio_callback(LPSPI_Type *base, lpspi_master_handle_t *handle,
+					  status_t status, void *userData)
+{
+	struct spi_mcux_data *data = userData;
+	struct spi_rtio *rtio_ctx = data->rtio_ctx;
+
+	if (rtio_ctx->txn_head != NULL) {
+		spi_mcux_iodev_complete(data->dev, status);
+		return;
+	}
+
+	spi_mcux_master_callback(base, handle, status, userData);
+}
+
 static void spi_mcux_iodev_start(const struct device *dev)
 {
 	struct spi_mcux_data *data = dev->data;
@@ -554,6 +558,8 @@ static void spi_mcux_iodev_start(const struct device *dev)
 		return;
 	}
 
+	LPSPI_MasterTransferCreateHandle(base, &data->handle, spi_mcux_master_rtio_callback, data);
+
 	transfer.configFlags = LPSPI_MASTER_XFER_CFG_FLAGS(spi_cfg->slave);
 
 	switch (sqe->op) {
@@ -647,6 +653,7 @@ static int transceive(const struct device *dev, const struct spi_config *spi_cfg
 		      const struct spi_buf_set *tx_bufs, const struct spi_buf_set *rx_bufs,
 		      bool asynchronous, spi_callback_t cb, void *userdata)
 {
+	LPSPI_Type *base = (LPSPI_Type *)DEVICE_MMIO_NAMED_GET(dev, reg_base);
 	struct spi_mcux_data *data = dev->data;
 	int ret;
 
@@ -657,6 +664,8 @@ static int transceive(const struct device *dev, const struct spi_config *spi_cfg
 		goto out;
 	}
 
+	LPSPI_MasterTransferCreateHandle(base, &data->handle, spi_mcux_master_callback, data);
+
 	spi_context_buffers_setup(&data->ctx, tx_bufs, rx_bufs, 1);
 
 	spi_context_cs_control(&data->ctx, true);