* iio on beagle bone black 3.13.6 kernel
@ 2014-03-22 17:19 gmane
[not found] ` <532F1DE0.9090908@kernel.org>
0 siblings, 1 reply; 3+ messages in thread
From: gmane @ 2014-03-22 17:19 UTC (permalink / raw)
To: linux-iio
Hi,
I use a beagle bone black with a 3.13.6 kernel and would like to get
the
./generic_buffer test which comes with the kernel to work.
This is what I do:
echo 1 > /sys/bus/iio/devices/iio_sysfs_trigger/add_trigger
ls /sys/bus/iio/devices/
iio:device0 iio_sysfs_trigger trigger0
cat /sys/bus/iio/devices/trigger0/name
sysfstrig1
echo 1 > /sys/bus/iio/devices/iio:device0/scan_elements/in_voltage5_en
./generic_buffer.out -n TI-am335x-adc -t sysfstrig1 -l 128
iio device number being used is 0
iio trigger number being used is 0
sysfstrig1
---> Could not open /trigger/current_trigger
Failed to write current_trigger file
How can I get rid of this?
Is this a problem with my driver, or should I just create this magic
file somewhere?
Regards,
Robert
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: iio on beagle bone black 3.13.6 kernel
[not found] ` <532F1DE0.9090908@kernel.org>
@ 2014-03-23 18:54 ` Zubair Lutfullah :
[not found] ` <532F3724.3020302@kernel.org>
0 siblings, 1 reply; 3+ messages in thread
From: Zubair Lutfullah : @ 2014-03-23 18:54 UTC (permalink / raw)
To: Jonathan Cameron; +Cc: gmane, linux-iio, zubair.lutfullah
On Sun, Mar 23, 2014 at 05:46:08PM +0000, Jonathan Cameron wrote:
> On 22/03/14 17:19, gmane@reliableembeddedsystems.com wrote:
> >Hi,
> >
> >I use a beagle bone black with a 3.13.6 kernel and would like to get the
> >./generic_buffer test which comes with the kernel to work.
> >
> >This is what I do:
> >
> >echo 1 > /sys/bus/iio/devices/iio_sysfs_trigger/add_trigger
> >
> >ls /sys/bus/iio/devices/
> >iio:device0 iio_sysfs_trigger trigger0
> >
> >cat /sys/bus/iio/devices/trigger0/name
> >sysfstrig1
> >
> >echo 1 > /sys/bus/iio/devices/iio:device0/scan_elements/in_voltage5_en
> >
> >
> >./generic_buffer.out -n TI-am335x-adc -t sysfstrig1 -l 128
> >iio device number being used is 0
> >iio trigger number being used is 0
> > sysfstrig1
> >---> Could not open /trigger/current_trigger
> >Failed to write current_trigger file
> >
> >How can I get rid of this?
> >
> >Is this a problem with my driver, or should I just create this magic
> >file somewhere?
> Does /sys/bus/iio/device/iio:device0/trigger/current_trigger exist?
> If so, try
> echo sysfstrig1 > /usys/bus/iio/device/iio:device0/trigger/current_trigger
> and see if that gives an error or not, then cat the same file to see if
> it 'took'.
>
> Otherwise, I'm not sure...
>
> Zubair, any thoughts?
>
I thought we removed trigger from this driver for using continuous sampling.
It was a hardware buffer driver with not proper support in generic_buffer.c
For one-shot sampling you just cat /sys/bus/iio/devices/iio:device0/channel etc.
For continuous sampling, modify generic_buffer.c to remove trigger checks.
Could you please tell me where you got this driver? It shouldn't be in any tree..
Regards
ZubairLK
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: iio on beagle bone black 3.13.6 kernel
[not found] ` <532F3724.3020302@kernel.org>
@ 2014-04-04 13:59 ` gmane
0 siblings, 0 replies; 3+ messages in thread
From: gmane @ 2014-04-04 13:59 UTC (permalink / raw)
To: Jonathan Cameron; +Cc: Zubair Lutfullah :, linux-iio
Hi,
On 2014-03-23 14:33, Jonathan Cameron wrote:
> On 23/03/14 18:54, Zubair Lutfullah : wrote:
>> On Sun, Mar 23, 2014 at 05:46:08PM +0000, Jonathan Cameron wrote:
>>> On 22/03/14 17:19, gmane@reliableembeddedsystems.com wrote:
>>>> Hi,
>>>>
>>>> I use a beagle bone black with a 3.13.6 kernel and would like to
>>>> get the
>>>> ./generic_buffer test which comes with the kernel to work.
>>>>
>>>> This is what I do:
>>>>
>>>> echo 1 > /sys/bus/iio/devices/iio_sysfs_trigger/add_trigger
>>>>
>>>> ls /sys/bus/iio/devices/
>>>> iio:device0 iio_sysfs_trigger trigger0
>>>>
>>>> cat /sys/bus/iio/devices/trigger0/name
>>>> sysfstrig1
>>>>
>>>> echo 1 >
>>>> /sys/bus/iio/devices/iio:device0/scan_elements/in_voltage5_en
>>>>
>>>>
>>>> ./generic_buffer.out -n TI-am335x-adc -t sysfstrig1 -l 128
>>>> iio device number being used is 0
>>>> iio trigger number being used is 0
>>>> sysfstrig1
>>>> ---> Could not open /trigger/current_trigger
>>>> Failed to write current_trigger file
>>>>
>>>> How can I get rid of this?
>>>>
>>>> Is this a problem with my driver, or should I just create this
>>>> magic
>>>> file somewhere?
>>> Does /sys/bus/iio/device/iio:device0/trigger/current_trigger exist?
>>> If so, try
>>> echo sysfstrig1 >
>>> /usys/bus/iio/device/iio:device0/trigger/current_trigger
>>> and see if that gives an error or not, then cat the same file to see
>>> if
>>> it 'took'.
>>>
>>> Otherwise, I'm not sure...
>>>
>>> Zubair, any thoughts?
>>>
>>
>> I thought we removed trigger from this driver for using continuous
>> sampling.
>> It was a hardware buffer driver with not proper support in
>> generic_buffer.c
> Good point. I have a mind like a sieve sometimes :)
This might explain my issues ;)
>>
>> For one-shot sampling you just cat
>> /sys/bus/iio/devices/iio:device0/channel etc.
As far as I remember this works.
>> For continuous sampling, modify generic_buffer.c to remove trigger
>> checks.
I will have a look at the code and will try to understand what you are
talking about ;)
>>
>> Could you please tell me where you got this driver? It shouldn't be
>> in any tree..
> From the email I suspect he's using your mainlined driver, but without
> the
> generic_buffer.c changes (as you never sent them out, *hint*)
I would assume this is mainline and also the generic_buffer.c is from
the same mainline kernel.
To be exact:
kernel:
3.13.6 stable
patches:
https://github.com/RobertBerger/meta-mainline/blob/dora-training-v3.13.x/beagle-bone-black-ml/recipes-kernel/linux/linux-yocto-custom/beagle-bone-black-ml-user-patches.scc
(which should not affect iio)
BTW:
This (your) reply email does not show up in Gmane[1] for some strange
reason, hence my late reply and the additional post [2] (where replies
seem to work)
[1] http://thread.gmane.org/gmane.linux.kernel.iio/11631
[2] http://thread.gmane.org/gmane.linux.kernel.iio/11673
>>
>> Regards
>> ZubairLK
>>
Regards,
Robert
^ permalink raw reply [flat|nested] 3+ messages in thread
end of thread, other threads:[~2014-04-04 13:59 UTC | newest]
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2014-03-22 17:19 iio on beagle bone black 3.13.6 kernel gmane
[not found] ` <532F1DE0.9090908@kernel.org>
2014-03-23 18:54 ` Zubair Lutfullah :
[not found] ` <532F3724.3020302@kernel.org>
2014-04-04 13:59 ` gmane
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