[Gta04-owner] QtMoko patch to show pressure from BMP085 device

Christoph Mair christoph.mair at gmail.com
Wed May 30 10:28:49 CEST 2012


On Wed, May 30, 2012 at 10:25 AM, Neil Jerram <neil at ossau.homelinux.net> wrote:
> NeilBrown <neilb at suse.de> writes:
>
>> On Tue, 29 May 2012 18:49:54 +0200 Neil Jerram <neil at ossau.homelinux.net>
>> wrote:
>>
>>> Sure, makes sense.  (Do you have a trick for checking all sysfs paths when
>>> moving to a new kernel?  Maybe just "grep -r /sys *"?)
>>>
>>
>> Try to avoid using paths that start /sys/devices.
>>
>> Look for a link from /sys/class/ instead.  Or maybe /sys/bus/.  It is more
>> likely to be stable. And shorter.
>
> Thanks, I hadn't heard that before.
>
> In the particular case of BMP085, though, there's unfortunately only
> a /sys/devices path:
>
> root at neo:~# find /sys -name "*pressure*"
> /sys/devices/platform/omap/omap_i2c.2/i2c-2/2-0077/pressure0_input
> root at neo:~#

There should be at least be a /sys/bus/i2c/devices/2-0077/.. (or
similar) path too.

Christoph


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