From: anarsoul@gmail.com (Vasily Khoruzhick)
To: linux-arm-kernel@lists.infradead.org
Subject: Problem with s3c24xx pwm driver
Date: Thu, 24 Sep 2009 17:33:24 +0300 [thread overview]
Message-ID: <200909241733.29167.anarsoul@gmail.com> (raw)
In-Reply-To: <f17812d70909231525t594704c5u781e2221481676a0@mail.gmail.com>
? ????????? ?? 24 ???????? 2009 01:25:46 ?? ????????:
> No, it doesn't.
>
> So my suggestion at the moment is that you may:
>
> 1. try dump the registers after pwm_enable() and see if all are setup
> correctly,
>
> 2. and make sure those registers are write-able at that time (some
> SoC doesn't allow register writing when the controller is disabled).
Ok, I've found source of problem: it seems to be some issue with backlight
LED driver (hardware, not software) with selected PWM clock. It seems that
part of period with "1" is not long enought to charge capacitor, or something
like this. PWM itself works fine.
Sorry for buzz.
Regards
Vasily
-------------- next part --------------
A non-text attachment was scrubbed...
Name: not available
Type: application/pgp-signature
Size: 198 bytes
Desc: This is a digitally signed message part.
URL: <http://lists.infradead.org/pipermail/linux-arm-kernel/attachments/20090924/3da13106/attachment.sig>
next prev parent reply other threads:[~2009-09-24 14:33 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-09-23 15:24 Problem with s3c24xx pwm driver Vasily Khoruzhick
2009-09-23 19:03 ` Eric Miao
2009-09-23 19:16 ` Vasily Khoruzhick
2009-09-23 19:23 ` Vasily Khoruzhick
2009-09-23 22:25 ` Eric Miao
2009-09-24 8:54 ` Vasily Khoruzhick
2009-09-24 14:33 ` Vasily Khoruzhick [this message]
2009-09-24 20:34 ` Russell King - ARM Linux
2009-09-25 6:07 ` Vasily Khoruzhick
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=200909241733.29167.anarsoul@gmail.com \
--to=anarsoul@gmail.com \
--cc=linux-arm-kernel@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.