From: Johan Hovold <jhovold@gmail.com>
To: Mark Brown <broonie@opensource.wolfsonmicro.com>
Cc: Rob Landley <rob@landley.net>, Richard Purdie <rpurdie@rpsys.net>,
Samuel Ortiz <sameo@linux.intel.com>,
Jonathan Cameron <jic23@cam.ac.uk>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
Florian Tobias Schandinat <FlorianSchandinat@gmx.de>,
Arnd Bergmann <arnd@arndb.de>,
Andrew Morton <akpm@linux-foundation.org>,
linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org,
linux-iio@vger.kernel.org, devel@driverdev.osuosl.org,
linux-fbdev@vger.kernel.org
Subject: Re: [PATCH v2 1/4] mfd: add LM3533 lighting-power core driver
Date: Thu, 3 May 2012 18:54:37 +0200 [thread overview]
Message-ID: <20120503165437.GF15752@localhost> (raw)
In-Reply-To: <20120503152407.GK3955@opensource.wolfsonmicro.com>
On Thu, May 03, 2012 at 04:24:07PM +0100, Mark Brown wrote:
> On Thu, May 03, 2012 at 05:00:40PM +0200, Johan Hovold wrote:
> > On Thu, May 03, 2012 at 12:38:02PM +0100, Mark Brown wrote:
>
> > > This is one of the reasons why we currently use tracepoints (they just
> > > don't have this issue as they're trivial to filter), though
> > > adding some sort of infrastructure for it ought not to be too difficult
> > > even if it's just at the regmap level.
>
> > So a /sys/kernel/debug/regmap/<device>/io_printk attribute (with a
> > better name) to enable debug printks in io paths
> > (regmap*{read,write,update} outside of mutex) in regmap.c would be
> > acceptable?
>
> Yes, that'd be totally fine for me - it's debugfs so we can always drop
> it later if someone comes up with a better idea or something.
Ok. I'll have a look at this next week (will be on the road for a few
days), and drop the dev_dbg from the lm3533 io-functions for now.
> > > Actually, the other question I had but forgot to ask (or I think punted
> > > on for your response) was why these are in sysfs at all - things like
> > > which things are connected to the backlight are going to be a property
> > > of the board design so should be defined by the machine not tweaked from
> > > userspace.
>
> > I agree with you and the reason is the same as for the max_current
> > attribute (discussed in the other thread) -- it was an explicit request
> > from the end customer.
>
> > I could replace the boost attributes with a platform_data entry where it
> > really belongs.
>
> I really think this is much better for mainline.
Agreed.
> > There is a use case (beyond testing/integration) for keeping the (lvled)
> > outputs configurable from userspace, in that it provides a way to
> > synchronise LED activity such as blinking. So I still want to keep those,
> > at least for the lvleds.
>
> I'm not sure exactly which control that is?
That would be the output_lvled[n] (n = 1..5) attributes. For example, to
have all five low-voltage sinks blink synchronously, you could assign 0
to all these five attributes, and set a timer trigger for the led device
which has id 0.
Thanks,
Johan
next prev parent reply other threads:[~2012-05-03 16:54 UTC|newest]
Thread overview: 83+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-04-20 15:30 [PATCH 0/4] mfd: add LM3533 lighting-power chip driver Johan Hovold
2012-04-20 15:30 ` [PATCH 1/4] mfd: add LM3533 lighting-power core driver Johan Hovold
2012-04-26 12:41 ` Mark Brown
2012-05-03 10:15 ` Johan Hovold
2012-05-03 10:22 ` Johan Hovold
2012-04-20 15:30 ` [PATCH 2/4] misc: add LM3533 ambient light sensor driver Johan Hovold
2012-04-20 15:57 ` Greg Kroah-Hartman
2012-04-20 17:28 ` Johan Hovold
2012-04-20 17:37 ` Greg Kroah-Hartman
2012-04-26 11:52 ` Johan Hovold
2012-04-20 15:30 ` [PATCH 3/4] leds: add LM3533 LED driver Johan Hovold
2012-04-20 16:10 ` Arnd Bergmann
2012-04-20 16:45 ` Johan Hovold
2012-04-20 15:30 ` [PATCH 4/4] backlight: add LM3533 backlight driver Johan Hovold
2012-05-03 10:26 ` [PATCH v2 0/4] mfd: add LM3533 lighting-power chip driver Johan Hovold
2012-05-03 10:26 ` [PATCH v2 1/4] mfd: add LM3533 lighting-power core driver Johan Hovold
2012-05-03 10:38 ` Mark Brown
2012-05-03 11:28 ` Johan Hovold
2012-05-03 11:38 ` Mark Brown
2012-05-03 15:00 ` Johan Hovold
2012-05-03 15:24 ` Mark Brown
2012-05-03 16:54 ` Johan Hovold [this message]
2012-05-03 16:57 ` Mark Brown
2012-05-03 17:14 ` Johan Hovold
2012-05-03 17:23 ` Mark Brown
2012-05-03 17:31 ` Johan Hovold
2012-05-09 14:42 ` Samuel Ortiz
2012-05-10 12:07 ` Johan Hovold
2012-05-10 12:11 ` [PATCH 1/2] mfd: lm3533: add boost frequency and ovp to platform data Johan Hovold
2012-05-10 12:11 ` [PATCH 2/2] mfd: lm3533: remove boost attributes Johan Hovold
2012-05-10 17:18 ` [PATCH 0/2] mfd: lm3533: update max-current interface Johan Hovold
2012-05-10 17:18 ` [PATCH 1/2] mfd: lm3533: remove unused max-current function Johan Hovold
2012-05-10 17:18 ` [PATCH 2/2] mfd: lm3533: use SI-units for max-current interface Johan Hovold
2012-05-11 13:32 ` [PATCH v2 1/4] mfd: add LM3533 lighting-power core driver Samuel Ortiz
2012-05-03 10:26 ` [PATCH v2 2/4] iio: add LM3533 ambient light sensor driver Johan Hovold
2012-05-03 11:40 ` Jonathan Cameron
2012-05-03 16:36 ` Johan Hovold
2012-05-08 13:47 ` Jonathan Cameron
2012-05-15 16:44 ` Johan Hovold
2012-05-15 20:00 ` Jonathan Cameron
2012-05-16 13:05 ` Johan Hovold
2012-05-16 14:21 ` Jonathan Cameron
2012-05-18 12:27 ` Johan Hovold
2012-05-18 17:34 ` Jonathan Cameron
2012-05-18 17:57 ` Johan Hovold
2012-05-19 8:04 ` Jonathan Cameron
2012-05-15 16:46 ` [PATCH v3] iio: add LM3533 ambient-light-sensor driver Johan Hovold
2012-05-15 19:27 ` Andrew Morton
2012-05-15 20:00 ` Johan Hovold
2012-05-15 20:16 ` Jonathan Cameron
2012-05-18 13:07 ` [PATCH v4] " Johan Hovold
2012-05-19 8:48 ` Jonathan Cameron
2012-05-19 16:30 ` Johan Hovold
2012-05-19 13:26 ` Jonathan Cameron
2012-05-21 9:50 ` Johan Hovold
2012-05-21 16:37 ` Jonathan Cameron
2012-05-21 22:07 ` Johan Hovold
2012-05-22 7:13 ` Jonathan Cameron
2012-05-22 9:09 ` Johan Hovold
2012-05-22 9:15 ` Jonathan Cameron
2012-05-22 7:45 ` Michael Hennerich
2012-05-22 7:49 ` Jonathan Cameron
2012-05-22 8:11 ` Michael Hennerich
2012-05-22 8:20 ` Jonathan Cameron
2012-05-21 12:18 ` [PATCH v5] " Johan Hovold
2012-05-22 9:19 ` Jonathan Cameron
2012-05-22 9:40 ` Johan Hovold
2012-05-22 13:55 ` Greg Kroah-Hartman
2012-06-05 4:11 ` Greg Kroah-Hartman
2012-05-03 10:26 ` [PATCH v2 3/4] leds: add LM3533 LED driver Johan Hovold
2012-05-03 10:43 ` Mark Brown
2012-05-03 11:50 ` Johan Hovold
2012-05-03 14:51 ` Mark Brown
2012-05-03 16:46 ` Johan Hovold
2012-05-10 18:27 ` [PATCH v3] " Johan Hovold
2012-05-10 18:48 ` Andrew Morton
2012-05-11 9:54 ` Johan Hovold
2012-05-11 22:24 ` Andrew Morton
2012-05-14 10:25 ` Johan Hovold
2012-05-14 10:31 ` [PATCH v4] " Johan Hovold
2012-05-03 10:26 ` [PATCH v2 4/4] backlight: add LM3533 backlight driver Johan Hovold
2012-05-10 18:29 ` [PATCH v3] " Johan Hovold
2012-05-15 19:13 ` [PATCH v4] " Johan Hovold
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=20120503165437.GF15752@localhost \
--to=jhovold@gmail.com \
--cc=FlorianSchandinat@gmx.de \
--cc=akpm@linux-foundation.org \
--cc=arnd@arndb.de \
--cc=broonie@opensource.wolfsonmicro.com \
--cc=devel@driverdev.osuosl.org \
--cc=gregkh@linuxfoundation.org \
--cc=jic23@cam.ac.uk \
--cc=linux-doc@vger.kernel.org \
--cc=linux-fbdev@vger.kernel.org \
--cc=linux-iio@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=rob@landley.net \
--cc=rpurdie@rpsys.net \
--cc=sameo@linux.intel.com \
/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 a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).