From: Oleg Kechin <okechin@gmail.com>
To: linux-mtd@lists.infradead.org
Subject: Standby/resume and MTD driver
Date: Thu, 14 Jun 2007 11:57:33 +0300 [thread overview]
Message-ID: <467102FD.80803@gmail.com> (raw)
Hi
I run 2.6.20-rt8 kernel on board like omap-innovator1510 (OMAP5910 cpu
ARM925 v4) with NOR flash
and jffs2 filesystem.
In case to enter standby mode, board enter cleanly, and it is OK, but
in resume there is a problem.
(I use echo -n standby > /sys/power/state command)
When it wakes up, at some times I get string:
omapflash.0: Waiting for chip to be ready timed out. Status 3068
Write of 68 bytes at 0x00945628 failed. returned -5, retlen 0
Not marking the space at 0x00945628 as dirty because the flash driver
returned retlen zero
I know that the error is in case flash go to standby in one state, but
return in another. Mtd driver has functions
for such cases - suspend and resume (cfi_intelext_suspend() &
cfi_intelext_resume()),
but both of this functions are not calling in suspend/resume process.
I can not find a way to call this function from user space - I can not
find ioctl or something like that.
May be I have to link those function in some pm list or something like
that? Is there any example?
PS. Flash to board added like that:
static struct flash_platform_data innovator_flash_data = {
.map_name = "cfi_probe",
.width = 2,
.parts = innovator_partitions,
.nr_parts = ARRAY_SIZE(innovator_partitions),
};
static struct resource innovator_flash_resource = {
.start = OMAP_CS0_PHYS,
.end = OMAP_CS0_PHYS + SZ_32M - 1,
.flags = IORESOURCE_MEM,
};
static struct platform_device innovator_flash_device = {
.name = "omapflash",
.id = 0,
.dev = {
.platform_data = &innovator_flash_data,
},
.num_resources = 1,
.resource = &innovator_flash_resource,
}
Oleg Kechin
reply other threads:[~2007-06-14 8:57 UTC|newest]
Thread overview: [no followups] expand[flat|nested] mbox.gz Atom feed
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=467102FD.80803@gmail.com \
--to=okechin@gmail.com \
--cc=linux-mtd@lists.infradead.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.