diff options
| author | Hongbo Zhang <hongbo.zhang@freescale.com> | 2013-09-26 17:33:43 +0800 |
|---|---|---|
| committer | Vinod Koul <vinod.koul@intel.com> | 2013-11-13 14:26:27 +0530 |
| commit | 8de7a7d95049bdbe454ade7add08d893efe5a456 (patch) | |
| tree | 218e7b1f3982f57470ad8e519f3be9ae356a5bec /drivers | |
| parent | 03aa254f1e3c3d902cd68763f8abc2387e82b4da (diff) | |
| download | linux-8de7a7d95049bdbe454ade7add08d893efe5a456.tar.bz2 | |
DMA: Freescale: update driver to support 8-channel DMA engine
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>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/dma/Kconfig | 9 | ||||
| -rw-r--r-- | drivers/dma/fsldma.c | 9 | ||||
| -rw-r--r-- | drivers/dma/fsldma.h | 2 |
3 files changed, 12 insertions, 8 deletions
diff --git a/drivers/dma/Kconfig b/drivers/dma/Kconfig index f238cfd33847..cd325866d9f4 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. config MPC512X_DMA tristate "Freescale MPC512x built-in DMA engine support" diff --git a/drivers/dma/fsldma.c b/drivers/dma/fsldma.c index b3f3e90054f2..4e898121707b 100644 --- a/drivers/dma/fsldma.c +++ b/drivers/dma/fsldma.c @@ -1253,7 +1253,9 @@ 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; @@ -1426,6 +1428,7 @@ 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", }, {} @@ -1447,7 +1450,7 @@ 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); } @@ -1459,5 +1462,5 @@ 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 f5c38791fc74..1ffc24484d23 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 */ |