From: Chris Packham <chris.packham@alliedtelesis.co.nz>
To: robh+dt@kernel.org, gregory.clement@free-electrons.com,
bp@alien8.de, jlu@pengutronix.de,
linux-arm-kernel@lists.infradead.org, linux-edac@vger.kernel.org,
linux-kernel@vger.kernel.org
Cc: Chris Packham <chris.packham@alliedtelesis.co.nz>,
Jason Cooper <jason@lakedaemon.net>, Andrew Lunn <andrew@lunn.ch>,
Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>,
Mark Rutland <mark.rutland@arm.com>,
Russell King <linux@armlinux.org.uk>,
devicetree@vger.kernel.org
Subject: [RESEND PATCH 3/4] ARM: dts: mvebu: set reduced-width property for SDRAM on 98dx3236
Date: Mon, 7 Aug 2017 13:46:40 +1200 [thread overview]
Message-ID: <20170807014641.4003-4-chris.packham@alliedtelesis.co.nz> (raw)
In-Reply-To: <20170807014641.4003-1-chris.packham@alliedtelesis.co.nz>
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@alliedtelesis.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@1400 {
compatible = "marvell,armada-xp-sdram-controller";
reg = <0x1400 0x500>;
+ marvell,reduced-width;
};
L2: l2-cache@8000 {
--
2.13.0
next prev parent reply other threads:[~2017-08-07 1:47 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-08-07 1:46 [RESEND PATCH 0/4] EDAC: support reduce bus width on 98dx3236 Chris Packham
2017-08-07 1:46 ` [RESEND PATCH 1/4] ARM: dts: enable L2 cache parity and ecc on db-xc3-24g4xg board Chris Packham
2017-08-07 1:46 ` [RESEND PATCH 2/4] dt-bindings: add "reduced-width" property for Armada XP SDRAM controller Chris Packham
2017-08-10 20:38 ` Rob Herring
2017-08-10 21:17 ` Chris Packham
2017-08-11 9:34 ` Jan Lübbe
2017-08-07 1:46 ` Chris Packham [this message]
2017-08-07 1:46 ` [RESEND PATCH 4/4] EDAC: add support for reduced-width Armada-XP SDRAM Chris Packham
2017-08-11 9:14 ` Borislav Petkov
2017-08-13 21:28 ` Chris Packham
2017-09-20 13:04 ` [RESEND PATCH 0/4] EDAC: support reduce bus width on 98dx3236 Gregory CLEMENT
2017-09-20 15:56 ` Chris Packham
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