drivers: dma: xmc4xxx: Add support for enabling fifo_mode_control

Adds fifo_mode_control option.

Signed-off-by: Andriy Gelman <[email protected]>

Author: talih0

drivers/dma/dma_xmc4xxx.c

@@ -213,6 +213,8 @@ static int dma_xmc4xxx_config(const struct device *dev, uint32_t channel, struct
 	dma->CH[channel].CFGL = (config->channel_priority << GPDMA0_CH_CFGL_CH_PRIOR_Pos) |
 				GPDMA0_CH_CFGL_HS_SEL_SRC_Msk | GPDMA0_CH_CFGL_HS_SEL_DST_Msk;
 
+	dma->CH[channel].CFGH = 0;
+
 	dma->CH[channel].CTLL = config->dest_data_size / 2 << GPDMA0_CH_CTLL_DST_TR_WIDTH_Pos |
 				config->source_data_size / 2 << GPDMA0_CH_CTLL_SRC_TR_WIDTH_Pos |
 				block->dest_addr_adj << GPDMA0_CH_CTLL_DINC_Pos |
@@ -272,6 +274,10 @@ static int dma_xmc4xxx_config(const struct device *dev, uint32_t channel, struct
 		}
 	}
 
+	if (block->fifo_mode_control > 0) {
+		dma->CH[channel].CFGH |= GPDMA0_CH_CFGH_FIFO_MODE_Msk;
+	}
+
 	if (block->source_gather_en) {
 		dma->CH[channel].CTLL |= BIT(GPDMA0_CH_CTLL_SRC_GATHER_EN_Pos);
 		/* truncate if we are out of range */