linux-kernel - [PATCH v5 2/6] ARM: dts: sun8i: v3s: Add mbus node to represent the interconnect

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Date:   Fri, 26 Aug 2022 20:27:59 +0200
From:   Paul Kocialkowski <paul.kocialkowski@...tlin.com>
To:     devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-sunxi@...ts.linux.dev, linux-kernel@...r.kernel.org,
        linux-media@...r.kernel.org
Cc:     Rob Herring <robh+dt@...nel.org>, Chen-Yu Tsai <wens@...e.org>,
        Jernej Skrabec <jernej.skrabec@...il.com>,
        Samuel Holland <samuel@...lland.org>,
        Michael Turquette <mturquette@...libre.com>,
        Stephen Boyd <sboyd@...nel.org>,
        Frank Rowand <frowand.list@...il.com>,
        Maxime Ripard <mripard@...nel.org>,
        Laurent Pinchart <laurent.pinchart@...asonboard.com>,
        Thomas Petazzoni <thomas.petazzoni@...tlin.com>,
        Paul Kocialkowski <paul.kocialkowski@...tlin.com>
Subject: [PATCH v5 2/6] ARM: dts: sun8i: v3s: Add mbus node to represent the interconnect

The V3s uses the mbus interconnect to provide DRAM access for a
number of blocks. The SoC can only map 2 GiB of DRAM, which is
reflected in the dma-ranges property.

Signed-off-by: Paul Kocialkowski <paul.kocialkowski@...tlin.com>
Reviewed-by: Samuel Holland <samuel@...lland.org>
---
 arch/arm/boot/dts/sun8i-v3s.dtsi | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/arch/arm/boot/dts/sun8i-v3s.dtsi b/arch/arm/boot/dts/sun8i-v3s.dtsi
index db194c606fdc..34f7df6b3960 100644
--- a/arch/arm/boot/dts/sun8i-v3s.dtsi
+++ b/arch/arm/boot/dts/sun8i-v3s.dtsi
@@ -579,6 +579,21 @@ int_mii_phy: ethernet-phy@1 {
 			};
 		};
 
+		mbus: dram-controller@...2000 {
+			compatible = "allwinner,sun8i-v3s-mbus";
+			reg = <0x01c62000 0x1000>,
+			      <0x01c63000 0x1000>;
+			reg-names = "mbus", "dram";
+			clocks = <&ccu CLK_MBUS>,
+				 <&ccu CLK_DRAM>,
+				 <&ccu CLK_BUS_DRAM>;
+			clock-names = "mbus", "dram", "bus";
+			#address-cells = <1>;
+			#size-cells = <1>;
+			dma-ranges = <0x00000000 0x40000000 0x80000000>;
+			#interconnect-cells = <1>;
+		};
+
 		spi0: spi@...8000 {
 			compatible = "allwinner,sun8i-h3-spi";
 			reg = <0x01c68000 0x1000>;
-- 
2.37.1