linux-kernel - Re: [PATCH] ARM: OMAP2+: Fix onenand initialization to avoid filesystem corruption

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Date:	Wed, 10 Feb 2016 23:12:26 +0200
From:	Aaro Koskinen <aaro.koskinen@....fi>
To:	Tony Lindgren <tony@...mide.com>
Cc:	Ivaylo Dimitrov <ivo.g.dimitrov.75@...il.com>, rogerq@...com,
	khilman@...prootsystems.com, linux@....linux.org.uk,
	pali.rohar@...il.com, sre@...nel.org, pavel@....cz, nm@...com,
	linux-omap@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] ARM: OMAP2+: Fix onenand initialization to avoid
 filesystem corruption

Hi,

On Mon, Feb 08, 2016 at 11:36:45AM -0800, Tony Lindgren wrote:
> * Ivaylo Dimitrov <ivo.g.dimitrov.75@...il.com> [160205 06:38]:
> > Commit <e7b11dc7b77bfce0a351230a5feeadc1d0bba997> ("ARM: OMAP2+: Fix
> > onenand rate detection to avoid filesystem corruption") partially fixed
> > onenand configuration when GPMC module is reset. Finish the job by also
> > providing the correct values in ONENAND_REG_SYS_CFG1 register.
> 
> OK. So probably the INT or RDY polarity made the ECC not work.
> 
> Aaro, care to dump out also the nolo configured CFG1 value from
> n8x0 and n9(50)?
> 
> You can do it by adding something like this to the beginning
> of set_onenand_cfg():
> 
> pr_info("CFG1: 0x%04x\n", readw(onenand_base + ONENAND_REG_SYS_CFG1));
> 
> And presumably the values are the same as on n900. If not, we
> should do the legacy file system flash test on all of them
> before committing this fix.

I got these (with CONFIG_OMAP_GPMC_DEBUG also enabled):

N800:
[    2.803100] CFG1: 0x46c0
[    3.150115] CFG1: 0x06c0

N810:
[    2.802368] CFG1: 0x46c0
[    3.148620] CFG1: 0x06c0

N900:
[    4.965576] CFG1: 0x46c0
[    5.333740] CFG1: 0x06c0

N950:
[    4.217193] CFG1: 0x66c4
[    4.583221] CFG1: 0x06c0

N9:
[    4.212677] CFG1: 0x66c4
[    4.578613] CFG1: 0x06c0

A.