Subject: [PATCH 2/2] memory: omap-gpmc: Add Kconfig option for debug

From: [email-masked] (Tony Lindgren)
Date: Mon, 4 Jan 2016 20:13:56 -0800

* Ivaylo Dimitrov <[email-masked]> [160104 10:59]:
> Hi,
> 
> On  4.01.2016 19:40, Tony Lindgren wrote:
> >>On Monday 04 January 2016 18:02:06 Tony Lindgren wrote:
> >>>> >Care to boot with CONFIG_OMAP_GPMC_DEBUG=y and post the gpmc related
> >>>> >dmesg output?
> 
> Here it is, including the pre-gpmc log, keep in mind this is with restored
> HWMOD_INIT_NO_RESET flag so rootfs is functional and I can get dmesg output
> from the syslog. Don't know if it is helpful :). Also, this device has
> Numonyx onenand (HW rev. 2204), unlike most of the others which have Samsung
> onenand (HW rev. 2101 etc), no idea if it is relevant.

Thanks. I got the problem reproduced here too.

[    1.915557] gpmc cs0 after gpmc_cs_set_timings:
[    1.920410] cs0 GPMC_CS_CONFIG1: 0xfb001201

Looks like in the failing case the clock rates are not properly
calculated in GPMC and GPMCFCLKDIVIDER is set wrong in
GPMC_CS_CONFIG1. Need to look at it more to figure out what's the
best way to fix this.

Regards,

Tony