linux-kernel - Re: [PATCH v7 7/7] mtd: ubi: provide NVMEM layer over UBI volumes

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Message-ID: <1196553263.78350.1710887478387.JavaMail.zimbra@nod.at>
Date: Tue, 19 Mar 2024 23:31:18 +0100 (CET)
From: Richard Weinberger <richard@....at>
To: Daniel Golle <daniel@...rotopia.org>
Cc: Miquel Raynal <miquel.raynal@...tlin.com>, 
	Vignesh Raghavendra <vigneshr@...com>, 
	Rob Herring <robh+dt@...nel.org>, 
	Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>, 
	Conor Dooley <conor+dt@...nel.org>, 
	linux-mtd <linux-mtd@...ts.infradead.org>, 
	devicetree <devicetree@...r.kernel.org>, 
	linux-kernel <linux-kernel@...r.kernel.org>, 
	david oberhollenzer <david.oberhollenzer@...ma-star.at>
Subject: Re: [PATCH v7 7/7] mtd: ubi: provide NVMEM layer over UBI volumes

----- Ursprüngliche Mail -----
> Von: "Daniel Golle" <daniel@...rotopia.org>
>> BTW: Is there a nice way to test this with nandsim in qemu?
>> I'd love being able to test all ubi attach code paths on my test setup.
> 
> From what I can tell 'nandsim' doesn't have a way to be defined in
> Device Tree, making it unsuitable to test the attachment of UBI in
> this way.
> 
> However, QEMU does support emulating TI OMAP's OneNAND controller, eg.
> as part of the Nokia N810 hardware supported by qemu-system-arm, see
> 
> https://www.qemu.org/docs/master/system/arm/nseries.html
> 
> So we could use that and modify the device tree in Linux to have a MTD
> partition for UBI and 'compatible = "linux,ubi";' set therein:
> 
> https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/arch/arm/boot/dts/ti/omap/omap2420-n8x0-common.dtsi#n84
> 
> If you like I can prepare such a test setup.

This would be great!

> Is there a repository for MTD/UBI tests to be run on QEMU which I should
> contribute this to?

UBI tests reside in the mtd-utils repository.
http://git.infradead.org/?p=mtd-utils.git;a=tree;f=tests/ubi-tests;h=20fd6a043eeb96a81736dd07885f74e4e0bb0cc0;hb=HEAD

Maybe you can provide a small shell script which configures qemu?
It doesn't have to be fancy, just something David or I can use as staring point.

Thanks,
//richard