From 0b9e49e6704b81fd991827b0b60a0a6d56d06921 Mon Sep 17 00:00:00 2001 From: Matt Porter Date: Mon, 24 Jun 2013 17:31:59 +0530 Subject: spi: omap2-mcspi: add generic DMA request support to the DT binding The binding definition is based on the generic DMA request binding Signed-off-by: Matt Porter Signed-off-by: Joel A Fernandes Signed-off-by: Sourav Poddar Signed-off-by: Mark Brown --- Documentation/devicetree/bindings/spi/omap-spi.txt | 27 +++++++++++++++++++++- 1 file changed, 26 insertions(+), 1 deletion(-) (limited to 'Documentation/devicetree') diff --git a/Documentation/devicetree/bindings/spi/omap-spi.txt b/Documentation/devicetree/bindings/spi/omap-spi.txt index 938809c6829b..4c85c4c69584 100644 --- a/Documentation/devicetree/bindings/spi/omap-spi.txt +++ b/Documentation/devicetree/bindings/spi/omap-spi.txt @@ -10,7 +10,18 @@ Required properties: input. The default is D0 as input and D1 as output. -Example: +Optional properties: +- dmas: List of DMA specifiers with the controller specific format + as described in the generic DMA client binding. A tx and rx + specifier is required for each chip select. +- dma-names: List of DMA request names. These strings correspond + 1:1 with the DMA specifiers listed in dmas. The string naming + is to be "rxN" and "txN" for RX and TX requests, + respectively, where N equals the chip select number. + +Examples: + +[hwmod populated DMA resources] mcspi1: mcspi@1 { #address-cells = <1>; @@ -20,3 +31,17 @@ mcspi1: mcspi@1 { ti,spi-num-cs = <4>; }; +[generic DMA request binding] + +mcspi1: mcspi@1 { + #address-cells = <1>; + #size-cells = <0>; + compatible = "ti,omap4-mcspi"; + ti,hwmods = "mcspi1"; + ti,spi-num-cs = <2>; + dmas = <&edma 42 + &edma 43 + &edma 44 + &edma 45>; + dma-names = "tx0", "rx0", "tx1", "rx1"; +}; -- cgit v1.2.3