linux-kernel - [PATCH 2/3] ARM: dts: mvebu: set reduced-width property for SDRAM on 98dx3236

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Message-Id: <20170806223006.14231-3-chris.packham@alliedtelesis.co.nz>
Date:   Mon,  7 Aug 2017 10:30:05 +1200
From:   Chris Packham <chris.packham@...iedtelesis.co.nz>
To:     robh+dt@...nel.org, gregory.clement@...e-electrons.com,
        bp@...en8.de, jlu@...gutronix.de
Cc:     Chris Packham <chris.packham@...iedtelesis.co.nz>,
        Jason Cooper <jason@...edaemon.net>,
        Andrew Lunn <andrew@...n.ch>,
        Sebastian Hesselbarth <sebastian.hesselbarth@...il.com>,
        Mark Rutland <mark.rutland@....com>,
        Russell King <linux@...linux.org.uk>,
        linux-arm-kernel@...ts.infradead.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH 2/3] ARM: dts: mvebu: set reduced-width property for SDRAM on 98dx3236

Because the 98dx3236 and similar SoCs are switch chips with integrated
CPUs they use a reduced pin count for the SDRAM interface. As such
"full" with is 32-bits and "half" width is 16-bits (as opposed to 64/32
on the discrete SoC). Set the reduced-width property on the sdramc node
to indicate this.

Signed-off-by: Chris Packham <chris.packham@...iedtelesis.co.nz>
---
 arch/arm/boot/dts/armada-xp-98dx3236.dtsi | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/arm/boot/dts/armada-xp-98dx3236.dtsi b/arch/arm/boot/dts/armada-xp-98dx3236.dtsi
index 0e12816d961e..4d6a2acc1b55 100644
--- a/arch/arm/boot/dts/armada-xp-98dx3236.dtsi
+++ b/arch/arm/boot/dts/armada-xp-98dx3236.dtsi
@@ -129,6 +129,7 @@
 			sdramc@...0 {
 				compatible = "marvell,armada-xp-sdram-controller";
 				reg = <0x1400 0x500>;
+				marvell,reduced-width;
 			};
 
 			L2: l2-cache@...0 {
-- 
2.13.0