[PATCH v4 2/3] serial: fsl_lpuart: add DMA support
From: mark.rutland@arm.com (Mark Rutland)
Date: 2014-01-24 11:31:14
Also in:
linux-serial
On Wed, Jan 22, 2014 at 04:09:32AM +0000, Yuan Yao wrote:
quoted hunk ↗ jump to hunk
Add dma support for lpuart. This function depend on DMA driver. You can turn on it by write both the dmas and dma-name properties in dts node. Signed-off-by: Yuan Yao <redacted> --- .../devicetree/bindings/serial/fsl-lpuart.txt | 19 +- drivers/tty/serial/fsl_lpuart.c | 430 ++++++++++++++++++++- 2 files changed, 433 insertions(+), 16 deletions(-)diff --git a/Documentation/devicetree/bindings/serial/fsl-lpuart.txt b/Documentation/devicetree/bindings/serial/fsl-lpuart.txt index 6fd1dd1..6e1cbbf 100644 --- a/Documentation/devicetree/bindings/serial/fsl-lpuart.txt +++ b/Documentation/devicetree/bindings/serial/fsl-lpuart.txt@@ -5,10 +5,21 @@ Required properties: - reg : Address and length of the register set for the device - interrupts : Should contain uart interrupt +Optional properties: +- dmas: Generic dma devicetree binding as described + in Documentation/devicetree/bindings/dma/dma.txt. +- dma-names: Two dmas have to be defined, "rx" and "tx". + An ordered list of channel names affiliated to the above.
Please describe dmas in terms of dma-names (as with the patch describing
clocks and clock-names).
It would be nice to describe the type of the dmas property, but I see
that we have a propblem with inconsistent terminology in the area of
${THING}-specifiers, so I'll try to get that cleaned up separately.
Cheers,
Mark.