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| author |   Chunyan Zhang <zhang.chunyan@linaro.org> | 2020-01-16 16:21:45 +0530 |
|---|---|---|
| committer |   Ulf Hansson <ulf.hansson@linaro.org> | 2020-01-20 10:36:11 +0100 |
| commit | 83a1b4cc80fa0d167c71b75ed727da9627d03928 (patch) | |
| tree | 7d1da35390cb97b55f4eb8d153015fe7c16ea729 /Documentation/devicetree/bindings/mmc | |
| parent | dt-bindings: mmc: fsl-imx-esdhc: add i.MX8MP compatible string (diff) | |
| download | wireguard-linux-83a1b4cc80fa0d167c71b75ed727da9627d03928.tar.xz wireguard-linux-83a1b4cc80fa0d167c71b75ed727da9627d03928.zip | |
dt-bindings: sdhci-omap: Add properties for using external dma
sdhci-omap can support both external dma controller via dmaengine
framework as well as ADMA which standard SD host controller
provides. Add binding documentation for these external dma properties.
Signed-off-by: Chunyan Zhang <zhang.chunyan@linaro.org>
Signed-off-by: Faiz Abbas <faiz_abbas@ti.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20200116105154.7685-2-faiz_abbas@ti.com
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Diffstat (limited to 'Documentation/devicetree/bindings/mmc')
| -rw-r--r-- | Documentation/devicetree/bindings/mmc/sdhci-omap.txt | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/mmc/sdhci-omap.txt b/Documentation/devicetree/bindings/mmc/sdhci-omap.txt index 72c4dec7e1db..97efb01617dd 100644 --- a/Documentation/devicetree/bindings/mmc/sdhci-omap.txt +++ b/Documentation/devicetree/bindings/mmc/sdhci-omap.txt @@ -15,6 +15,13 @@ Required properties: "hs200_1_8v", - pinctrl-<n> : Pinctrl states as described in bindings/pinctrl/pinctrl-bindings.txt +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. +- 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 "tx" + and "rx" for TX and RX DMA requests, respectively. + Example: mmc1: mmc@4809c000 { compatible = "ti,dra7-sdhci"; @@ -22,4 +29,6 @@ Example: ti,hwmods = "mmc1"; bus-width = <4>; vmmc-supply = <&vmmc>; /* phandle to regulator node */ + dmas = <&sdma 61 &sdma 62>; + dma-names = "tx", "rx"; }; |