[PATCH 2/3] dt-bindings: mtd: atmel-quadspi: add an optional property 'dmacap, memcpy'
From: Cyrille Pitchen <hidden>
Date: 2017-12-24 04:42:14
Also in:
linux-spi, lkml
Subsystem:
memory technology devices (mtd), open firmware and flattened device tree bindings, the rest · Maintainers:
Miquel Raynal, Richard Weinberger, Vignesh Raghavendra, Rob Herring, Krzysztof Kozlowski, Conor Dooley, Linus Torvalds
The optional 'dmacap,memcpy' DT property tells the Atmel QSPI controller driver to reserve some DMA channel then to use it to perform DMA memcpy() during data transfers. This feature relies on the generic bounce buffer helper from spi-nor.c. Signed-off-by: Cyrille Pitchen <redacted> --- Documentation/devicetree/bindings/mtd/atmel-quadspi.txt | 5 +++++ 1 file changed, 5 insertions(+)
diff --git a/Documentation/devicetree/bindings/mtd/atmel-quadspi.txt b/Documentation/devicetree/bindings/mtd/atmel-quadspi.txt
index b93c1e2f25dd..002d3f0a445b 100644
--- a/Documentation/devicetree/bindings/mtd/atmel-quadspi.txt
+++ b/Documentation/devicetree/bindings/mtd/atmel-quadspi.txt@@ -12,6 +12,10 @@ Required properties: - #address-cells: Should be <1>. - #size-cells: Should be <0>. +Optional properties: +- dmacap,memcpy: Reserve a DMA channel to perform DMA memcpy() between the + system memory and the QSPI mapped memory. + Example: spi@f0020000 {
@@ -24,6 +28,7 @@ spi@f0020000 { #size-cells = <0>; pinctrl-names = "default"; pinctrl-0 = <&pinctrl_spi0_default>; + dmacap,memcpy; m25p80@0 { ...
--
2.11.0
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