linux-kernel - [PATCH] dmaengine: mxs-dma: Declare slave capabilities for the generic code

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Message-Id: <1419873679-14463-1-git-send-email-festevam@gmail.com>
Date:	Mon, 29 Dec 2014 15:21:19 -0200
From:	Fabio Estevam <festevam@...il.com>
To:	vinod.koul@...el.com
Cc:	linux-kernel@...r.kernel.org, shawn.guo@...aro.org,
	kernel@...gutronix.de, Fabio Estevam <fabio.estevam@...escale.com>,
	Maxime Ripard <maxime.ripard@...e-electrons.com>
Subject: [PATCH] dmaengine: mxs-dma: Declare slave capabilities for the generic code

From: Fabio Estevam <fabio.estevam@...escale.com>

Since ecc19d17868be9c ("dmaengine: Add a warning for drivers not using the
generic slave caps retrieval") the following warning is observed:

[    0.113023] ------------[ cut here ]------------
[    0.113053] WARNING: CPU: 0 PID: 1 at drivers/dma/dmaengine.c:830 dma_async_device_register+0x2a0/0x4c8()
[    0.113063] this driver doesn't support generic slave capabilities reporting

Declare the slave capabilities to avoid such warning.

Cc: Maxime Ripard <maxime.ripard@...e-electrons.com>
Signed-off-by: Fabio Estevam <fabio.estevam@...escale.com>
---
 drivers/dma/mxs-dma.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/dma/mxs-dma.c b/drivers/dma/mxs-dma.c
index 599ffb5..829ec68 100644
--- a/drivers/dma/mxs-dma.c
+++ b/drivers/dma/mxs-dma.c
@@ -848,6 +848,10 @@ static int __init mxs_dma_probe(struct platform_device *pdev)
 	mxs_dma->dma_device.device_pause = mxs_dma_pause_chan;
 	mxs_dma->dma_device.device_resume = mxs_dma_resume_chan;
 	mxs_dma->dma_device.device_terminate_all = mxs_dma_terminate_all;
+	mxs_dma->dma_device.src_addr_widths = BIT(DMA_SLAVE_BUSWIDTH_4_BYTES);
+	mxs_dma->dma_device.dst_addr_widths = BIT(DMA_SLAVE_BUSWIDTH_4_BYTES);
+	mxs_dma->dma_device.directions = BIT(DMA_DEV_TO_MEM) | BIT(DMA_MEM_TO_DEV);
+	mxs_dma->dma_device.residue_granularity = DMA_RESIDUE_GRANULARITY_BURST;
 	mxs_dma->dma_device.device_issue_pending = mxs_dma_enable_chan;
 
 	ret = dma_async_device_register(&mxs_dma->dma_device);
-- 
1.9.1

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