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46 lines
1.4 KiB
Diff
46 lines
1.4 KiB
Diff
From 6d356030061c6e90437dbf4b32f95a1fa36d8868 Mon Sep 17 00:00:00 2001
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From: Martin Sperl <kernel@martin.sperl.org>
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Date: Wed, 22 Jul 2015 08:34:41 +0000
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Subject: [PATCH 160/171] dt-overlay to enable dma for spi driver
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Signed-off-by: Martin Sperl <kernel@martin.sperl.org>
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---
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arch/arm/boot/dts/overlays/Makefile | 1 +
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arch/arm/boot/dts/overlays/spi-dma-overlay.dts | 20 ++++++++++++++++++++
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2 files changed, 21 insertions(+)
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create mode 100755 arch/arm/boot/dts/overlays/spi-dma-overlay.dts
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--- a/arch/arm/boot/dts/overlays/Makefile
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+++ b/arch/arm/boot/dts/overlays/Makefile
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@@ -45,6 +45,7 @@ dtb-$(RPI_DT_OVERLAYS) += rpi-sense-over
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dtb-$(RPI_DT_OVERLAYS) += sdhost-overlay.dtb
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dtb-$(RPI_DT_OVERLAYS) += spi-bcm2708-overlay.dtb
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dtb-$(RPI_DT_OVERLAYS) += spi-bcm2835-overlay.dtb
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+dtb-$(RPI_DT_OVERLAYS) += spi-dma-overlay.dtb
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dtb-$(RPI_DT_OVERLAYS) += tinylcd35-overlay.dtb
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dtb-$(RPI_DT_OVERLAYS) += uart1-overlay.dtb
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dtb-$(RPI_DT_OVERLAYS) += vga666-overlay.dtb
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--- /dev/null
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+++ b/arch/arm/boot/dts/overlays/spi-dma-overlay.dts
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@@ -0,0 +1,20 @@
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+/*
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+ * Device tree overlay for spi-bcm2835 to allow dma
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+ */
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+
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+/dts-v1/;
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+/plugin/;
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+
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+/ {
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+ compatible = "brcm,bcm2835", "brcm,bcm2836", "brcm,bcm2708", "brcm,bcm2709";
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+
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+ fragment@0 {
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+ target = <&spi0>;
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+ __overlay__ {
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+ #address-cells = <1>;
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+ #size-cells = <0>;
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+ dmas = <&dma 6>, <&dma 7>;
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+ dma-names = "tx", "rx";
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+ };
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+ };
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+ };
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