linux-kernel - [PATCH] dma: mmp_pdma: fix warning about slave caps

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Date:	Sun, 15 Feb 2015 19:49:16 +0100
From:	Robert Jarzmik <robert.jarzmik@...e.fr>
To:	Vinod Koul <vinod.koul@...el.com>
Cc:	dmaengine@...r.kernel.org, linux-kernel@...r.kernel.org,
	Daniel Mack <zonque@...il.com>,
	Robert Jarzmik <robert.jarzmik@...e.fr>
Subject: [PATCH] dma: mmp_pdma: fix warning about slave caps

Fix the dmaengine complaint about missing slave caps :
 - declare the available bus widths
 - declare the available transfer types
 - declare the residue calculation type

Signed-off-by: Robert Jarzmik <robert.jarzmik@...e.fr>
---
 drivers/dma/mmp_pdma.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/drivers/dma/mmp_pdma.c b/drivers/dma/mmp_pdma.c
index 1b82bd6..cadd9e5 100644
--- a/drivers/dma/mmp_pdma.c
+++ b/drivers/dma/mmp_pdma.c
@@ -1018,6 +1018,9 @@ static int mmp_pdma_probe(struct platform_device *op)
 	struct resource *iores;
 	int i, ret, irq = 0;
 	int dma_channels = 0, irq_num = 0;
+	const enum dma_slave_buswidth widths =
+		DMA_SLAVE_BUSWIDTH_1_BYTE   | DMA_SLAVE_BUSWIDTH_2_BYTES |
+		DMA_SLAVE_BUSWIDTH_4_BYTES;
 
 	pdev = devm_kzalloc(&op->dev, sizeof(*pdev), GFP_KERNEL);
 	if (!pdev)
@@ -1085,6 +1088,10 @@ static int mmp_pdma_probe(struct platform_device *op)
 	pdev->device.device_config = mmp_pdma_config;
 	pdev->device.device_terminate_all = mmp_pdma_terminate_all;
 	pdev->device.copy_align = PDMA_ALIGNMENT;
+	pdev->device.src_addr_widths = widths;
+	pdev->device.dst_addr_widths = widths;
+	pdev->device.directions = BIT(DMA_MEM_TO_DEV) | BIT(DMA_DEV_TO_MEM);
+	pdev->device.residue_granularity = DMA_RESIDUE_GRANULARITY_DESCRIPTOR;
 
 	if (pdev->dev->coherent_dma_mask)
 		dma_set_mask(pdev->dev, pdev->dev->coherent_dma_mask);
-- 
2.1.0

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