Re: [PATCH v6 5/9] dt-bindings: ARM: document marvell,ecc-enable binding
From: Russell King - ARM Linux <linux@armlinux.org.uk>
Date: 2018-11-09 11:48:43
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linux-arm-kernel, linux-edac, lkml
On Fri, Nov 09, 2018 at 12:40:06PM +0100, Arnd Bergmann wrote:
On Fri, Nov 9, 2018 at 8:04 AM Chris Packham [off-list ref] wrote:quoted
Add documentation for the marvell,ecc-enable and marvell,ecc-disable properties which can be used to enable/disable ECC on the Marvell aurora cache. Signed-off-by: Chris Packham <chris.packham@alliedtelesis.co.nz> ---Why do you need both enable and disable? Wouldn't one of them be enough here?
It isn't an "on when ecc-enable is present, off when not" because the current behaviour is to preserve these bits in the control register. If we were to implement it as "if no ecc-enable property, turn off ECC" then that would drastically change the behaviour - systems which were configured for ECC suddenly lose ECC support. Since we don't know which have it and which don't, we can't implement the option like that. -- RMK's Patch system: http://www.armlinux.org.uk/developer/patches/ FTTC broadband for 0.8mile line in suburbia: sync at 12.1Mbps down 622kbps up According to speedtest.net: 11.9Mbps down 500kbps up