linux-kernel - [PATCH v2 2/7] dmaengine: dw-edma: Report channel hw_id in dma_slave

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Message-ID: <20260127033420.3460579-3-den@valinux.co.jp>
Date: Tue, 27 Jan 2026 12:34:15 +0900
From: Koichiro Den <den@...inux.co.jp>
To: vkoul@...nel.org,
	mani@...nel.org,
	Frank.Li@....com,
	jingoohan1@...il.com,
	lpieralisi@...nel.org,
	kwilczynski@...nel.org,
	robh@...nel.org,
	bhelgaas@...gle.com
Cc: dmaengine@...r.kernel.org,
	linux-pci@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH v2 2/7] dmaengine: dw-edma: Report channel hw_id in dma_slave_caps

Expose the DesignWare eDMA per-channel identifier (chan->id) via
dma_get_slave_caps(). Note that the id space is separated for each read
or write channels.

Signed-off-by: Koichiro Den <den@...inux.co.jp>
---
 drivers/dma/dw-edma/dw-edma-core.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/dma/dw-edma/dw-edma-core.c b/drivers/dma/dw-edma/dw-edma-core.c
index 8e5f7defa6b6..38832d9447fd 100644
--- a/drivers/dma/dw-edma/dw-edma-core.c
+++ b/drivers/dma/dw-edma/dw-edma-core.c
@@ -217,6 +217,7 @@ static void dw_edma_device_caps(struct dma_chan *dchan,
 		else
 			caps->directions = BIT(DMA_MEM_TO_DEV);
 	}
+	caps->hw_id = chan->id;
 }
 
 static int dw_edma_device_config(struct dma_chan *dchan,
-- 
2.51.0