Hello. On 07/14/2013 12:12 PM, Lars-Peter Clausen wrote:
And are you sure you want to control this through sysfs? There's no other better user/kernel apis for it?
I found none, besides ioctl(), as the device driven is rather unique. But I thought that sysfs is "ioctl() today", so I went with it...
It does sound like it would fit better into IIO than just a misc driver, even if it's the only hardware of its kind.
I got somewhat familiarized myself with drivers/iio/ infrastructure and I have found a place only the for ADC device in which the customer currently has no interest. The other trouble is that I'll have to backport this driver to 3.4 which doesn't contain the IIO infrastructure at all. :-(
It has, it's just still in staging in 3.4. But the API (except for minor modifications) and more importantly the ABI are the same.
Thank you for the useful information. I wouldn't probably have figured it out to search there.
There is a angular velocity channel type in IIO. maybe that could be used to report the Speed-Pulse-ADC values.
You probably misunderstood from my terse description. Multichannel ADC interface is separate from the speed-pulse interface which has on its single input digital PWM signal of varying frequency. Speed pulse i/f measures pulse count and period. I've found no adequate channel type in IIO infrastructure so far. I'll mail the IIO maintainers with a request for help probably...
- Lars
WBR, Sergei -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
