drivers: dma: dma_nxp_edma: support 64-bit TCD

On some EDMA versions, some TCD registers (e.g: SADDR, DADDR,
SLAST, DLAST, etc...) are extended to 64 bits via adding a new
HIGH register holding the value of bits [63:32]. Since, for now,
the driver doesn't support 64-bit addresses, this scenario is
supported by sign-extending the 32-bit value written to SLAST/DLAST.
SADDR and DADDR are taken care of on HAL side.

Signed-off-by: Laurentiu Mihalcea <[email protected]>

Author: LaurentiuM1234

drivers/dma/dma_nxp_edma.h

@@ -514,6 +514,13 @@ static inline int set_slast_dlast(struct dma_config *dma_cfg,
 	EDMA_ChannelRegWrite(data->hal_cfg, chan_id, EDMA_TCD_SLAST_SDA, slast);
 	EDMA_ChannelRegWrite(data->hal_cfg, chan_id, EDMA_TCD_DLAST_SGA, dlast);
 
+	if (data->hal_cfg->flags & EDMA_HAS_64BIT_TCD_FLAG) {
+		EDMA_ChannelRegWrite(data->hal_cfg, chan_id, EDMA_TCD_SLAST_SDA_HIGH,
+				     slast >= 0x0 ? 0x0 : 0xffffffff);
+		EDMA_ChannelRegWrite(data->hal_cfg, chan_id, EDMA_TCD_DLAST_SGA_HIGH,
+				     dlast >= 0x0 ? 0x0 : 0xffffffff);
+	}
+
 	return 0;
 }