From mboxrd@z Thu Jan 1 00:00:00 1970 From: mporter@ti.com (Matt Porter) Date: Thu, 18 Oct 2012 09:26:54 -0400 Subject: [RFC PATCH v3 15/16] spi: omap2-mcspi: add generic DMA request support to the DT binding In-Reply-To: <1350566815-409-1-git-send-email-mporter@ti.com> References: <1350566815-409-1-git-send-email-mporter@ti.com> Message-ID: <1350566815-409-16-git-send-email-mporter@ti.com> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org The binding definition is based on the generic DMA request binding. Signed-off-by: Matt Porter --- Documentation/devicetree/bindings/spi/omap-spi.txt | 27 +++++++++++++++++++- 1 file changed, 26 insertions(+), 1 deletion(-) diff --git a/Documentation/devicetree/bindings/spi/omap-spi.txt b/Documentation/devicetree/bindings/spi/omap-spi.txt index 81df374..11aff04 100644 --- a/Documentation/devicetree/bindings/spi/omap-spi.txt +++ b/Documentation/devicetree/bindings/spi/omap-spi.txt @@ -7,8 +7,18 @@ Required properties: - ti,spi-num-cs : Number of chipselect supported by the instance. - ti,hwmods: Name of the hwmod associated to the McSPI +Optional properties: +- dmas: List of DMA controller phandle and DMA request ordered + pairs. One tx and one rx pair is required for each chip + select. +- dma-names: List of DMA request names. These strings correspond + 1:1 with the ordered pairs in dmas. The string naming is + to be "rxN" and "txN" for RX and TX requests, + respectively, where N equals the chip select number. -Example: +Examples: + +[hwmod populated DMA resources] mcspi1: mcspi at 1 { #address-cells = <1>; @@ -18,3 +28,18 @@ mcspi1: mcspi at 1 { ti,spi-num-cs = <4>; }; +[generic DMA request binding] + +mcspi1: mcspi at 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"; +}; + -- 1.7.9.5