drivers: spi_mcux_flexcomm: remove DMA block complete callbacks

For every TX, the driver used to get both callbacks when
each block was trasnfered and when the entire DMA was complete.
The callback for each block isn't needed so remove it
and reduce intermediate interrupts (the more blocks in
the DMA link, the more needless intermediate interrupts we
now no longer get).

Signed-off-by: Mike J. Chen <[email protected]>

Author: mjchen0

drivers/spi/spi_mcux_flexcomm.c

@@ -61,7 +61,6 @@ struct stream {
 	uint32_t channel; /* stores the channel for dma */
 	struct dma_config dma_cfg;
 	struct dma_block_config dma_blk_cfg[CONFIG_SPI_MCUX_FLEXCOMM_DMA_MAX_BLOCKS];
-	int wait_for_dma_status;
 };
 #endif
 
@@ -330,9 +329,6 @@ static void spi_mcux_dma_callback(const struct device *dev, void *arg,
 	} else {
 		/* identify the origin of this callback */
 		if (channel == data->dma_tx.channel) {
-			if (status != data->dma_tx.wait_for_dma_status) {
-				return;
-			}
 			/* this part of the transfer ends */
 			data->status_flags |= SPI_MCUX_FLEXCOMM_DMA_TX_DONE_FLAG;
 		} else if (channel == data->dma_rx.channel) {
@@ -409,7 +405,6 @@ static int spi_mcux_dma_tx_load(const struct device *dev, const struct spi_confi
 		blk_cfg->source_addr_adj = DMA_ADDR_ADJ_NO_CHANGE;
 		blk_cfg->block_size = sizeof(uint32_t);
 		blk_cfg->next_block = NULL;
-		data->dma_tx.wait_for_dma_status = DMA_STATUS_COMPLETE;
 	} else {
 		blk_cfg->block_size = len;
 		blk_cfg->next_block = blk_cfg + 1;
@@ -421,7 +416,6 @@ static int spi_mcux_dma_tx_load(const struct device *dev, const struct spi_confi
 			blk_cfg->source_address = (uint32_t)&data->dummy_tx_buffer;
 			blk_cfg->source_addr_adj = DMA_ADDR_ADJ_NO_CHANGE;
 		}
-		data->dma_tx.wait_for_dma_status = DMA_STATUS_BLOCK;
 	}
 	return EXIT_SUCCESS;
 }
@@ -917,7 +911,6 @@ static DEVICE_API(spi, spi_mcux_driver_api) = {
 		.dma_cfg = {						\
 			.channel_direction = LPC_DMA_SPI_MCUX_FLEXCOMM_TX,	\
 			.dma_callback = spi_mcux_dma_callback,		\
-			.complete_callback_en = true,			\
 			.block_count = 2,				\
 		}							\
 	},								\