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| author | Shawn Guo <shawn.guo@linaro.org> | 2013-02-26 06:47:41 +0100 |
|---|---|---|
| committer | Shawn Guo <shawn.guo@linaro.org> | 2013-04-04 15:22:45 +0200 |
| commit | bcc20f9e40bdfa6c3f254bcb90d8657fe7bba04d (patch) | |
| tree | d8c956576f9fb3e2466a29957d0a4c1cdedd732b /Documentation | |
| parent | mtd: gpmi: move to use generic DMA helper (diff) | |
| download | linux-bcc20f9e40bdfa6c3f254bcb90d8657fe7bba04d.tar.xz linux-bcc20f9e40bdfa6c3f254bcb90d8657fe7bba04d.zip | |
serial: mxs-auart: move to use generic DMA helper
With the generic DMA device tree helper supported by mxs-dma driver,
client devices only need to call dma_request_slave_channel() for
requesting a DMA channel from dmaengine.
Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Reviewed-by: Arnd Bergmann <arnd@arndb.de>
Diffstat (limited to 'Documentation')
| -rw-r--r-- | Documentation/devicetree/bindings/tty/serial/fsl-mxs-auart.txt | 16 |
1 files changed, 7 insertions, 9 deletions
diff --git a/Documentation/devicetree/bindings/tty/serial/fsl-mxs-auart.txt b/Documentation/devicetree/bindings/tty/serial/fsl-mxs-auart.txt index 273a8d5b3300..2c00ec64628e 100644 --- a/Documentation/devicetree/bindings/tty/serial/fsl-mxs-auart.txt +++ b/Documentation/devicetree/bindings/tty/serial/fsl-mxs-auart.txt @@ -5,20 +5,18 @@ Required properties: imx23 and imx28. - reg : Address and length of the register set for the device - interrupts : Should contain the auart interrupt numbers - -Optional properties: -- fsl,auart-dma-channel : The DMA channels, the first is for RX, the other - is for TX. If you add this property, it also means that you - will enable the DMA support for the auart. - Note: due to the hardware bug in imx23(see errata : 2836), - only the imx28 can enable the DMA support for the auart. +- dmas: DMA specifier, consisting of a phandle to DMA controller node + and AUART DMA channel ID. + Refer to dma.txt and fsl-mxs-dma.txt for details. +- dma-names: "rx" for RX channel, "tx" for TX channel. Example: auart0: serial@8006a000 { compatible = "fsl,imx28-auart", "fsl,imx23-auart"; reg = <0x8006a000 0x2000>; - interrupts = <112 70 71>; - fsl,auart-dma-channel = <8 9>; + interrupts = <112>; + dmas = <&dma_apbx 8>, <&dma_apbx 9>; + dma-names = "rx", "tx"; }; Note: Each auart port should have an alias correctly numbered in "aliases" |