[PATCH v3 3/7] Documentation: DT: update atmel SSC with DMA binding
From: Richard Genoud <hidden>
Date: 2013-07-09 12:29:21
Also in:
alsa-devel, linux-arm-kernel, lkml
Subsystem:
open firmware and flattened device tree bindings, the rest · Maintainers:
Rob Herring, Krzysztof Kozlowski, Conor Dooley, Linus Torvalds
As atmel-ssc can be used with DMA, the documentation should be updated. Also, a configuration DMA example is given. Signed-off-by: Richard Genoud <redacted> --- .../devicetree/bindings/misc/atmel-ssc.txt | 24 ++++++++++++++++++-- 1 file changed, 22 insertions(+), 2 deletions(-)
diff --git a/Documentation/devicetree/bindings/misc/atmel-ssc.txt b/Documentation/devicetree/bindings/misc/atmel-ssc.txt
index 38e51ad..96958ca 100644
--- a/Documentation/devicetree/bindings/misc/atmel-ssc.txt
+++ b/Documentation/devicetree/bindings/misc/atmel-ssc.txt@@ -6,10 +6,30 @@ Required properties: - atmel,at91sam9g45-ssc: support dma transfer - reg: Should contain SSC registers location and length - interrupts: Should contain SSC interrupt +For dma transfer: +- dmas: DMA specifier, consisting of a phandle to DMA controller node, + the memory interface and SSC DMA channel ID (for tx and rx). + See Documentation/devicetree/bindings/dma/atmel-dma.txt for details. +- dma-names: Must be "tx", "rx". -Example: + +Examples: ssc0: ssc@fffbc000 { compatible = "atmel,at91rm9200-ssc"; reg = <0xfffbc000 0x4000>; - interrupts = <14 4 5>; + interrupts = <14 IRQ_TYPE_LEVEL_HIGH 5>; }; + + +ssc0: ssc@f0010000 { + compatible = "atmel,at91sam9g45-ssc"; + reg = <0xf0010000 0x4000>; + interrupts = <28 IRQ_TYPE_LEVEL_HIGH 5>; + dmas = <&dma0 1 AT91_DMA_CFG_PER_ID(13)>, + <&dma0 1 AT91_DMA_CFG_PER_ID(14)>; + dma-names = "tx", "rx"; + pinctrl-names = "default"; + pinctrl-0 = <&pinctrl_ssc0_tx &pinctrl_ssc0_rx>; + status = "disabled"; +}; +
--
1.7.10.4