From mboxrd@z Thu Jan 1 00:00:00 1970 From: Chris Packham Subject: [PATCH 1/3] dt-bindings: add "reduced-width" property for Armada XP SDRAM controller Date: Mon, 7 Aug 2017 10:30:04 +1200 Message-ID: <20170806223006.14231-2-chris.packham@alliedtelesis.co.nz> References: <20170806223006.14231-1-chris.packham@alliedtelesis.co.nz> Return-path: In-Reply-To: <20170806223006.14231-1-chris.packham-6g8wRflRTwXFdCa3tKVlE6U/zSkkHjvu@public.gmane.org> Sender: devicetree-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org To: robh+dt-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org, gregory.clement-wi1+55ScJUtKEb57/3fJTNBPR1lH4CV8@public.gmane.org, bp-Gina5bIWoIWzQB+pC5nmwQ@public.gmane.org, jlu-bIcnvbaLZ9MEGnE8C9+IrQ@public.gmane.org Cc: Chris Packham , Mark Rutland , devicetree-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org List-Id: devicetree@vger.kernel.org Some SoC implementations that use this controller have a reduced pin count so the meaning of "full" and "half" with change. Signed-off-by: Chris Packham --- .../bindings/memory-controllers/mvebu-sdram-controller.txt | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/Documentation/devicetree/bindings/memory-controllers/mvebu-sdram-controller.txt b/Documentation/devicetree/bindings/memory-controllers/mvebu-sdram-controller.txt index 89657d1d4cd4..3041868321c8 100644 --- a/Documentation/devicetree/bindings/memory-controllers/mvebu-sdram-controller.txt +++ b/Documentation/devicetree/bindings/memory-controllers/mvebu-sdram-controller.txt @@ -13,6 +13,12 @@ Required properties: - reg: a resource specifier for the register space, which should include all SDRAM controller registers as per the datasheet. +Optional properties: + - marvell,reduced-width: some SoCs that use this SDRAM controller have + a reduced pin count. On such systems "full" width is 32-bits and + "half" width is 16-bits. Set this property to indicate that the SoC + used is such a system. + Example: sdramc@1400 { -- 2.13.0 -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org More majordomo info at http://vger.kernel.org/majordomo-info.html