linux-kernel - [PATCH v2] dmaengine: xilinx_dma: Set dma

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Message-ID: <20250507182101.909010-1-thomas.gessler@brueckmann-gmbh.de>
Date: Wed,  7 May 2025 20:21:01 +0200
From: Thomas Gessler <thomas.gessler@...eckmann-gmbh.de>
To: dmaengine@...r.kernel.org
Cc: linux-kernel@...r.kernel.org,
	Vinod Koul <vkoul@...nel.org>,
	Michal Simek <michal.simek@....com>,
	Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>,
	Uwe Kleine-König <u.kleine-koenig@...libre.com>,
	Thomas Gessler <thomas.gessler@...eckmann-gmbh.de>,
	Radhey Shyam Pandey <radhey.shyam.pandey@....com>,
	Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>,
	Marek Vasut <marex@...x.de>,
	linux-arm-kernel@...ts.infradead.org,
	Suraj Gupta <Suraj.Gupta2@....com>,
	Harini Katakam <harini.katakam@....com>
Subject: [PATCH v2] dmaengine: xilinx_dma: Set dma_device directions

Coalesce the direction bits from the enabled TX and/or RX channels into
the directions bit mask of dma_device. Without this mask set,
dma_get_slave_caps() in the DMAEngine fails, which prevents the driver
from being used with an IIO DMAEngine buffer.

Signed-off-by: Thomas Gessler <thomas.gessler@...eckmann-gmbh.de>
---
Changes in v2:
  - Change to Suraj's simpler version as per Radhey's request

 drivers/dma/xilinx/xilinx_dma.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/dma/xilinx/xilinx_dma.c b/drivers/dma/xilinx/xilinx_dma.c
index 3ad44afd0e74..8f26b6eff3f3 100644
--- a/drivers/dma/xilinx/xilinx_dma.c
+++ b/drivers/dma/xilinx/xilinx_dma.c
@@ -2909,6 +2909,8 @@ static int xilinx_dma_chan_probe(struct xilinx_dma_device *xdev,
 		return -EINVAL;
 	}
 
+	xdev->common.directions |= chan->direction;
+
 	/* Request the interrupt */
 	chan->irq = of_irq_get(node, chan->tdest);
 	if (chan->irq < 0)