From: Jean Delvare <khali-PUYAD+kWke1g9hUCZPvPmw@public.gmane.org>
To: Jonathan Cameron <jic23-KWPb1pKIrIJaa/9Udqfwiw@public.gmane.org>
Cc: Hugo Meric <hugo.meric-Qt13gs6zZMY@public.gmane.org>,
linux-i2c-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
Subject: Re: HMC6343
Date: Tue, 7 Jul 2009 14:20:06 +0200 [thread overview]
Message-ID: <20090707142006.2c998ba7@hyperion.delvare> (raw)
In-Reply-To: <4A53375B.9070304-KWPb1pKIrIJaa/9Udqfwiw@public.gmane.org>
On Tue, 07 Jul 2009 11:54:03 +0000, Jonathan Cameron wrote:
> Jean Delvare wrote:
> > Note: this could be done from userspace too if needed. The i2c-dev
> > interface supports raw reads and writes.
> >
> Good point, I'd missed that functionality (did seem a little odd
> that I couldn't find it!)
>
> Method's much the same, but involves using the relevant ioctl
> (I2C_RDWR), in conjunction iwth an appropriately filled
> i2c_rdwr_ioctl_data structure.
>
> The i2c_smbus_access function in i2c-dev.h (lm-sensors version)
> is similar enough to show how to do it.
Actually: i2c-tools version of i2c-dev.h
As some point in the future I'll try to get it generated from the
kernel's one so that it gets integrated into the standard
kernel-headers package. But this involves moving some of the helper
functions to a new library and I could never find the time to set this
up.
--
Jean Delvare
next prev parent reply other threads:[~2009-07-07 12:20 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <23114.97301.qm@web28307.mail.ukl.yahoo.com>
[not found] ` <20090707095934.7b86524f@hyperion.delvare>
[not found] ` <20090707095934.7b86524f-ig7AzVSIIG7kN2dkZ6Wm7A@public.gmane.org>
2009-07-07 11:38 ` [lm-sensors] HMC6343 Jonathan Cameron
[not found] ` <4A5333C6.3080802-KWPb1pKIrIJaa/9Udqfwiw@public.gmane.org>
2009-07-07 11:46 ` Jean Delvare
[not found] ` <20090707134638.6ff1b324-ig7AzVSIIG7kN2dkZ6Wm7A@public.gmane.org>
2009-07-07 11:54 ` Jonathan Cameron
[not found] ` <4A53375B.9070304-KWPb1pKIrIJaa/9Udqfwiw@public.gmane.org>
2009-07-07 12:20 ` Jean Delvare [this message]
[not found] ` <874671.80619.qm@web28313.mail.ukl.yahoo.com>
[not found] ` <874671.80619.qm-KpgP/9vcbyPGRxTy+Q50vsz6deESKz/lQQ4Iyu8u01E@public.gmane.org>
2009-07-08 10:37 ` Re : " Jonathan Cameron
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