linux-kernel - [PATCH v3 09/10] arm64: allwinner: a64: Add device node for DMA controller

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Message-ID: <801a02c2-b31f-4f1d-a3e9-8ded8ab6f1aa@rwthex-w2-a.rwth-ad.de>
Date:   Mon, 25 Sep 2017 02:02:43 +0200
From:   Stefan Brüns <stefan.bruens@...h-aachen.de>
To:     <linux-sunxi@...glegroups.com>
CC:     <devicetree@...r.kernel.org>, Chen-Yu Tsai <wens@...e.org>,
        Andre Przywara <andre.przywara@....com>,
        <linux-kernel@...r.kernel.org>,
        Dan Williams <dan.j.williams@...el.com>,
        Vinod Koul <vinod.koul@...el.com>,
        Rob Herring <robh+dt@...nel.org>, <dmaengine@...r.kernel.org>,
        Code Kipper <codekipper@...il.com>,
        Maxime Ripard <maxime.ripard@...e-electrons.com>,
        <linux-arm-kernel@...ts.infradead.org>,
        Stefan Brüns <stefan.bruens@...h-aachen.de>,
        Catalin Marinas <catalin.marinas@....com>,
        Will Deacon <will.deacon@....com>,
        Mark Rutland <mark.rutland@....com>
Subject: [PATCH v3 09/10] arm64: allwinner: a64: Add device node for DMA controller

The A64 SoC has a DMA controller that supports 8 DMA channels
to and from various peripherals. The last used DRQ port is 27.

Add a device node for it.

Signed-off-by: Stefan Brüns <stefan.bruens@...h-aachen.de>

---

Changes in v3:
- Drop leading 0 from dma controller unit name

Changes in v2: None

 arch/arm64/boot/dts/allwinner/sun50i-a64.dtsi | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/arch/arm64/boot/dts/allwinner/sun50i-a64.dtsi b/arch/arm64/boot/dts/allwinner/sun50i-a64.dtsi
index e9a9d7fb01c8..cbffefce0e71 100644
--- a/arch/arm64/boot/dts/allwinner/sun50i-a64.dtsi
+++ b/arch/arm64/boot/dts/allwinner/sun50i-a64.dtsi
@@ -136,6 +136,17 @@
 			reg = <0x01c00000 0x1000>;
 		};
 
+		dma: dma-controller@...2000 {
+			compatible = "allwinner,sun50i-a64-dma";
+			reg = <0x01c02000 0x1000>;
+			interrupts = <GIC_SPI 50 IRQ_TYPE_LEVEL_HIGH>;
+			clocks = <&ccu CLK_BUS_DMA>;
+			dma-channels = <8>;
+			dma-requests = <27>;
+			resets = <&ccu RST_BUS_DMA>;
+			#dma-cells = <1>;
+		};
+
 		mmc0: mmc@...f000 {
 			compatible = "allwinner,sun50i-a64-mmc";
 			reg = <0x01c0f000 0x1000>;
-- 
2.14.1