linux-kernel - [PATCH V2 2/2] DMA: Freescale: update driver to support 8-channel DMA engine

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <1373005626-20726-3-git-send-email-hongbo.zhang@freescale.com>
Date:	Fri, 5 Jul 2013 14:27:06 +0800
From:	<hongbo.zhang@...escale.com>
To:	<vinod.koul@...el.com>, <djbw@...com>, <leoli@...escale.com>,
	<scottwood@...escale.com>, <linuxppc-dev@...ts.ozlabs.org>
CC:	<devicetree-discuss@...ts.ozlabs.org>,
	<linux-kernel@...r.kernel.org>, <vakul@...escale.com>,
	Hongbo Zhang <hongbo.zhang@...escale.com>
Subject: [PATCH V2 2/2] DMA: Freescale: update driver to support 8-channel DMA engine

From: Hongbo Zhang <hongbo.zhang@...escale.com>

This patch adds support to 8-channel DMA engine, thus the driver works for both
the new 8-channel and the legacy 4-channel DMA engines.

Signed-off-by: Hongbo Zhang <hongbo.zhang@...escale.com>
---
 drivers/dma/fsldma.c |    5 ++++-
 drivers/dma/fsldma.h |    2 +-
 2 files changed, 5 insertions(+), 2 deletions(-)

diff --git a/drivers/dma/fsldma.c b/drivers/dma/fsldma.c
index 4fc2980..7732de2 100644
--- a/drivers/dma/fsldma.c
+++ b/drivers/dma/fsldma.c
@@ -1261,7 +1261,9 @@ static int fsl_dma_chan_probe(struct fsldma_device *fdev,
 	WARN_ON(fdev->feature != chan->feature);
 
 	chan->dev = fdev->dev;
-	chan->id = ((res.start - 0x100) & 0xfff) >> 7;
+	chan->id = (res.start & 0xfff) < 0x300 ?
+		   ((res.start - 0x100) & 0xfff) >> 7 :
+		   ((res.start - 0x200) & 0xfff) >> 7;
 	if (chan->id >= FSL_DMA_MAX_CHANS_PER_DEVICE) {
 		dev_err(fdev->dev, "too many channels for device\n");
 		err = -EINVAL;
@@ -1435,6 +1437,7 @@ static int fsldma_of_remove(struct platform_device *op)
 }
 
 static const struct of_device_id fsldma_of_ids[] = {
+	{ .compatible = "fsl,elo3-dma", },
 	{ .compatible = "fsl,eloplus-dma", },
 	{ .compatible = "fsl,elo-dma", },
 	{}
diff --git a/drivers/dma/fsldma.h b/drivers/dma/fsldma.h
index f5c3879..1ffc244 100644
--- a/drivers/dma/fsldma.h
+++ b/drivers/dma/fsldma.h
@@ -112,7 +112,7 @@ struct fsldma_chan_regs {
 };
 
 struct fsldma_chan;
-#define FSL_DMA_MAX_CHANS_PER_DEVICE 4
+#define FSL_DMA_MAX_CHANS_PER_DEVICE 8
 
 struct fsldma_device {
 	void __iomem *regs;	/* DGSR register base */
-- 
1.7.9.5



--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/