From ff9071764e459f0ae477ca1121cb3d225bbab3f8 Mon Sep 17 00:00:00 2001 From: Martin Sperl Date: Wed, 22 Jul 2015 08:34:41 +0000 Subject: [PATCH 159/203] dt-overlay to enable dma for spi driver Signed-off-by: Martin Sperl --- arch/arm/boot/dts/overlays/Makefile | 1 + arch/arm/boot/dts/overlays/spi-dma-overlay.dts | 20 ++++++++++++++++++++ 2 files changed, 21 insertions(+) create mode 100755 arch/arm/boot/dts/overlays/spi-dma-overlay.dts --- a/arch/arm/boot/dts/overlays/Makefile +++ b/arch/arm/boot/dts/overlays/Makefile @@ -45,6 +45,7 @@ dtb-$(RPI_DT_OVERLAYS) += rpi-sense-over dtb-$(RPI_DT_OVERLAYS) += sdhost-overlay.dtb dtb-$(RPI_DT_OVERLAYS) += spi-bcm2708-overlay.dtb dtb-$(RPI_DT_OVERLAYS) += spi-bcm2835-overlay.dtb +dtb-$(RPI_DT_OVERLAYS) += spi-dma-overlay.dtb dtb-$(RPI_DT_OVERLAYS) += tinylcd35-overlay.dtb dtb-$(RPI_DT_OVERLAYS) += uart1-overlay.dtb dtb-$(RPI_DT_OVERLAYS) += vga666-overlay.dtb --- /dev/null +++ b/arch/arm/boot/dts/overlays/spi-dma-overlay.dts @@ -0,0 +1,20 @@ +/* + * Device tree overlay for spi-bcm2835 to allow dma + */ + +/dts-v1/; +/plugin/; + +/ { + compatible = "brcm,bcm2835", "brcm,bcm2836", "brcm,bcm2708", "brcm,bcm2709"; + + fragment@0 { + target = <&spi0>; + __overlay__ { + #address-cells = <1>; + #size-cells = <0>; + dmas = <&dma 6>, <&dma 7>; + dma-names = "tx", "rx"; + }; + }; + };