linux-kernel - Re: [PATCH v3 0/3] qcom: Add SMEM MTD parser

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Message-ID: <20150818170333.GA1581@codeaurora.org>
Date:	Tue, 18 Aug 2015 10:03:33 -0700
From:	Mathieu Olivari <mathieu@...eaurora.org>
To:	Jonas Gorski <jogo@...nwrt.org>
Cc:	Rob Herring <robh+dt@...nel.org>, Pawel Moll <pawel.moll@....com>,
	Mark Rutland <mark.rutland@....com>,
	Ian Campbell <ijc+devicetree@...lion.org.uk>,
	Kumar Gala <galak@...eaurora.org>, linux@....linux.org.uk,
	David Woodhouse <dwmw2@...radead.org>,
	Brian Norris <computersforpeace@...il.com>,
	agross@...eaurora.org, sboyd@...eaurora.org,
	bjorn.andersson@...ymobile.com,
	"devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	MTD Maling List <linux-mtd@...ts.infradead.org>
Subject: Re: [PATCH v3 0/3] qcom: Add SMEM MTD parser

On Tue, Aug 18, 2015 at 02:30:14PM +0200, Jonas Gorski wrote:
> Hi,
> 
> On Tue, Aug 18, 2015 at 1:47 AM, Mathieu Olivari <mathieu@...eaurora.org> wrote:
> > QCOM platforms such as IPQ806x are using SMEM to store their flash
> > layout. This patch set adds the DT nodes required to instanciate SMEM
> > on IPQ806x and add an MTD parser using it.
> >
> > This change is based on the SMEM driver posted here:
> > *https://lkml.org/lkml/2015/7/27/1125
> 
> Nice work. After testing it on AP148 I see this:
> 
> [    2.481507] 12 qcom-smem partitions found on MTD device qcom-nandc
> [    2.481540] Creating 12 MTD partitions on "qcom-nandc":
> [    2.486690] 0x000000000000-0x000000040000 : "0:SBL1"
> [    2.492842] 0x000000040000-0x000000180000 : "0:MIBIB"
> [    2.497857] 0x000000180000-0x0000002c0000 : "0:SBL2"
> [    2.502895] 0x0000002c0000-0x000000540000 : "0:SBL3"
> [    2.507828] 0x000000540000-0x000000660000 : "0:DDRCONFIG"
> [    2.512857] 0x000000660000-0x000000780000 : "0:SSD"
> [    2.518074] 0x000000780000-0x000000a00000 : "0:TZ"
> [    2.522834] 0x000000a00000-0x000000c80000 : "0:RPM"
> [    2.527607] 0x000000c80000-0x000001180000 : "0:APPSBL"
> [    2.532472] 0x000001180000-0x000001200000 : "0:APPSBLENV"
> [    2.537586] 0x000001200000-0x000001340000 : "0:ART"
> [    2.543140] 0x000001340000-0x000005340000 : "rootfs"
> 
> Are all these partition names supposed to be prefixed with "0:"? This
> is using the OpenWrt applied version.

Yes. These are the names as they are listed in SMEM. If you run the
"smem" command from the U-boot prompt, you will see the same information.
I'm not sure what the 0: prefix means, and where it comes from to be
honest.

> 
> 
> Jonas
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