From e7713a78829250b925d6377ee26c7b0745727feb Mon Sep 17 00:00:00 2001
From: Prasanth Babu Mantena <p-mantena@ti.com>
Date: Wed, 18 Dec 2024 18:30:45 +0530
Subject: [PATCH] dma: ti: k3-udma: Fix BCDMA probe by adding check for
MMR_RFLOW
RFLOW config related MMR does not exist incase of BCDMA.
Add check to bypass the RFLOW MMR extraction.
Without this, the probe sequence fails checking for
the MMR_RFLOW region, which is valid only for packet based
DMA and obselete for BCDMA.
Fixes: 5abb694d6016 ("dma: ti: k3-udma: Add support for native configuration of chan/flow")
Signed-off-by: Prasanth Babu Mantena <p-mantena@ti.com>
Tested-by: Jonathan Humphreys <j-humphreys@ti.com>
---
drivers/dma/ti/k3-udma.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/drivers/dma/ti/k3-udma.c b/drivers/dma/ti/k3-udma.c
index dac4023ccf..3013c4741d 100644
--- a/drivers/dma/ti/k3-udma.c
+++ b/drivers/dma/ti/k3-udma.c
@@ -1331,6 +1331,8 @@ static int udma_get_mmrs(struct udevice *dev)
continue;
if (i == MMR_RCHANRT && ud->rchan_cnt == 0)
continue;
+ if (i == MMR_RFLOW && ud->match_data->type == DMA_TYPE_BCDMA)
+ continue;
ud->mmrs[i] = dev_read_addr_name_ptr(dev, mmr_names[i]);
if (!ud->mmrs[i])
--
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