On 02/07/2013 13:50, Alexandre Belloni wrote:
> On 02/07/2013 13:45, Fabio Estevam wrote:
>
>> Shouldn't this be
>>
>> i2c@1 {
>> reg = <1>; ?
>>
>
> No, we have 4 devices on that mux and 2 pins to select the muxing.
>
OK, got it working.
So, the results:
bitbanging:
# time cat /sys/bus/iio/devices/iio\:device1/in_voltage0_raw
2637
real 0m 0.09s
user 0m 0.01s
sys 0m 0.01s
i2c-mxs PIO mode:
# time cat /sys/bus/iio/devices/iio\:device1/in_voltage0_raw
[ 35.007650] [sched_delayed] sched: RT throttling activated
2627
real 0m 7.14s
user 0m 0.02s
sys 0m 0.01s
i2c-mxs PIO mode without LRADC:
# time cat /sys/bus/iio/devices/iio\:device1/in_voltage0_raw
[ 18.007432] [sched_delayed] sched: RT throttling activated
2629
real 0m 7.09s
user 0m 0.00s
sys 0m 0.03s
i2c-mxs DMA mode:
# time cat /sys/bus/iio/devices/iio\:device1/in_voltage0_raw
2631
real 0m 0.12s
user 0m 0.01s
sys 0m 0.01s
It seems fine for me.
--
Alexandre Belloni, Free Electrons
Embedded Linux, Kernel and Android engineering
http://free-electrons.com
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