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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 <laurentiu.mihalcea@nxp.com>
This commit is contained in:
Laurentiu Mihalcea 2024-08-14 16:19:36 +03:00 committed by Anas Nashif
parent 7eb07479eb
commit b26d21fcfd
1 changed files with 7 additions and 0 deletions
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7
drivers/dma/dma_nxp_edma.h
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@ -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;
}