[PATCH 2/2] memory: omap-gpmc: Add Kconfig option for debug
ivo.g.dimitrov.75 at gmail.com
Fri Jan 1 03:29:00 PST 2016
On 21.05.2015 00:21, Tony Lindgren wrote:
> We support decoding the bootloader values if DEBUG is defined.
> But we also need to change the struct omap_hwmod flags to have
> HWMOD_INIT_NO_RESET to avoid the GPMC being reset during the
> boot. Otherwise just the default timings will be displayed
> instead of the bootloader configured timings.
> This also allows us to clean up the various GPMC related
> hwmod flags. For debugging, we only need HWMOD_INIT_NO_RESET,
> and HWMOD_INIT_NO_IDLE is not needed.
> Cc: Brian Hutchinson <b.hutchman at gmail.com>
> Cc: Paul Walmsley <paul at pwsan.com>
> Cc: Roger Quadros <rogerq at ti.com>
> Signed-off-by: Tony Lindgren <tony at atomide.com>
> arch/arm/mach-omap2/omap_hwmod.h | 6 ++++++
> arch/arm/mach-omap2/omap_hwmod_2xxx_ipblock_data.c | 12 ++----------
> arch/arm/mach-omap2/omap_hwmod_33xx_43xx_ipblock_data.c | 3 ++-
> arch/arm/mach-omap2/omap_hwmod_3xxx_data.c | 12 ++----------
> arch/arm/mach-omap2/omap_hwmod_44xx_data.c | 11 ++---------
> arch/arm/mach-omap2/omap_hwmod_7xx_data.c | 4 ++--
> arch/arm/mach-omap2/omap_hwmod_81xx_data.c | 2 ++
> drivers/memory/Kconfig | 8 ++++++++
> drivers/memory/omap-gpmc.c | 6 +++---
> 9 files changed, 29 insertions(+), 35 deletions(-)
1. Happy new year :)
2. It was a while I tested upstream on N900 but I had some spare time
during the holidays to play, so I tried to boot 4.4-rc6 with Maemo 5. To
my surprise, after that try, Maemo 5 rootfs, which is located on onenand
became irreversibly corrupted. I bisected the tree to the $subject
commit and after restoring HWMOD_INIT_NO_RESET in omap3xxx_gpmc_hwmod
flags, the problem was solved. It seems that GPMC is either incorrectly
or incompletely setup by the kernel, leading to failed onenand
reads/writes and whatnot. Unfortunately, what I have here is a release
device, so I am unable to capture any logs through the serial port. BTW
keep in mind that rootfs corruption happens as soon as a boot is
attempted, even after a freshly flashed rootfs.
Please advice on how to proceed.
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