[PATCH v2 09/12] dmaengine: dw-edma-pcie: Add register offset match flag

[Koichiro Den]

Add a match-data flag for devices whose DMA register block starts at an
offset inside the mapped BAR. Existing Synopsys EDDA and AMD/Xilinx MDB
matches keep using the BAR mapping base directly.

No functional change intended.

Reviewed-by: Frank Li <Frank.Li@xxxxxxx>
Signed-off-by: Koichiro Den <den@xxxxxxxxxxxxx>
---
 drivers/dma/dw-edma/dw-edma-pcie.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/dma/dw-edma/dw-edma-pcie.c b/drivers/dma/dw-edma/dw-edma-pcie.c
index 1d63b07723f9..8ba2b3917f05 100644
--- a/drivers/dma/dw-edma/dw-edma-pcie.c
+++ b/drivers/dma/dw-edma/dw-edma-pcie.c
@@ -89,6 +89,7 @@ struct dw_edma_pcie_match_data {
 };
 
 #define DW_EDMA_PCIE_F_DEVMEM_PHYS_OFF	BIT(0)
+#define DW_EDMA_PCIE_F_REG_OFFSET	BIT(1)
 
 static const struct dw_edma_pcie_data snps_edda_data = {
 	/* eDMA registers location */
@@ -445,6 +446,8 @@ static int dw_edma_pcie_probe(struct pci_dev *pdev,
 	chip->reg_base = pcim_iomap_table(pdev)[dma_data->rg.bar];
 	if (!chip->reg_base)
 		return -ENOMEM;
+	if (match->flags & DW_EDMA_PCIE_F_REG_OFFSET)
+		chip->reg_base += dma_data->rg.off;
 
 	for (i = 0; i < chip->ll_wr_cnt && !dma_data->cfg_non_ll; i++) {
 		struct dw_edma_region *ll_region = &chip->ll_region_wr[i];
-- 
2.51.0