From: <hongbo.zhang@freescale.com>
To: <vinod.koul@intel.com>, <djbw@fb.com>, <leoli@freescale.com>,
<scottwood@freescale.com>, <linuxppc-dev@lists.ozlabs.org>
Cc: Hongbo Zhang <hongbo.zhang@freescale.com>,
devicetree@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: [PATCH v5 3/4] DMA: Freescale: update driver to support 8-channel DMA engine
Date: Wed, 24 Jul 2013 14:21:08 +0800 [thread overview]
Message-ID: <1374646870-5162-4-git-send-email-hongbo.zhang@freescale.com> (raw)
In-Reply-To: <1374646870-5162-1-git-send-email-hongbo.zhang@freescale.com>
From: Hongbo Zhang <hongbo.zhang@freescale.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@freescale.com>
---
drivers/dma/Kconfig | 9 +++++----
drivers/dma/fsldma.c | 9 ++++++---
drivers/dma/fsldma.h | 2 +-
3 files changed, 12 insertions(+), 8 deletions(-)
diff --git a/drivers/dma/Kconfig b/drivers/dma/Kconfig
index 6825957..1b78272 100644
--- a/drivers/dma/Kconfig
+++ b/drivers/dma/Kconfig
@@ -89,14 +89,15 @@ config AT_HDMAC
Support the Atmel AHB DMA controller.
config FSL_DMA
- tristate "Freescale Elo and Elo Plus DMA support"
+ tristate "Freescale Elo series DMA support"
depends on FSL_SOC
select DMA_ENGINE
select ASYNC_TX_ENABLE_CHANNEL_SWITCH
---help---
- Enable support for the Freescale Elo and Elo Plus DMA controllers.
- The Elo is the DMA controller on some 82xx and 83xx parts, and the
- Elo Plus is the DMA controller on 85xx and 86xx parts.
+ Enable support for the Freescale Elo series DMA controllers.
+ The Elo is the DMA controller on some mpc82xx and mpc83xx parts, the
+ EloPlus is on mpc85xx and mpc86xx and Pxxx parts, and the Elo3 is on
+ some Txxx and Bxxx parts. Look up user manuals for details anyway.
config MPC512X_DMA
tristate "Freescale MPC512x built-in DMA engine support"
diff --git a/drivers/dma/fsldma.c b/drivers/dma/fsldma.c
index 49e8fbd..16a9a48 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;
@@ -1434,6 +1436,7 @@ 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", },
{}
@@ -1455,7 +1458,7 @@ static struct platform_driver fsldma_of_driver = {
static __init int fsldma_init(void)
{
- pr_info("Freescale Elo / Elo Plus DMA driver\n");
+ pr_info("Freescale Elo series DMA driver\n");
return platform_driver_register(&fsldma_of_driver);
}
@@ -1467,5 +1470,5 @@ static void __exit fsldma_exit(void)
subsys_initcall(fsldma_init);
module_exit(fsldma_exit);
-MODULE_DESCRIPTION("Freescale Elo / Elo Plus DMA driver");
+MODULE_DESCRIPTION("Freescale Elo series DMA driver");
MODULE_LICENSE("GPL");
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
next prev parent reply other threads:[~2013-07-24 6:21 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-07-24 6:21 [PATCH v5 0/4] DMA: Freescale: Add support for 8-channel DMA engine hongbo.zhang
2013-07-24 6:21 ` [PATCH v5 1/4] DMA: Freescale: revise device tree binding document hongbo.zhang
2013-07-24 6:21 ` [PATCH v5 2/4] DMA: Freescale: Add new 8-channel DMA engine device tree nodes hongbo.zhang
2013-07-24 19:29 ` Scott Wood
2013-07-24 6:21 ` hongbo.zhang [this message]
2013-07-24 19:30 ` [PATCH v5 3/4] DMA: Freescale: update driver to support 8-channel DMA engine Scott Wood
2013-07-24 6:21 ` [PATCH v5 4/4] DMA: Freescale: eliminate a compiling warning hongbo.zhang
2013-07-24 19:33 ` Scott Wood
2013-07-25 2:46 ` Hongbo Zhang
2013-07-24 6:34 ` [PATCH v5 0/4] DMA: Freescale: Add support for 8-channel DMA engine Li Yang
2013-07-24 6:47 ` Li Yang
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