x86/mm/pat: Don't report PAT on CPUs that don't support it
[linux/fpc-iii.git] / Documentation / ABI / testing / sysfs-bus-iio-ina2xx-adc
blob8916f7ec6507406dcef3f7cbfbcde5bc5209b189
1 What:           /sys/bus/iio/devices/iio:deviceX/in_allow_async_readout
2 Date:           December 2015
3 KernelVersion:  4.4
4 Contact:        linux-iio@vger.kernel.org
5 Description:
6                 By default (value '0'), the capture thread checks for the Conversion
7                 Ready Flag to being set prior to committing a new value to the sample
8                 buffer. This synchronizes the in-chip conversion rate with the
9                 in-driver readout rate at the cost of an additional register read.
11                 Writing '1' will remove the polling for the Conversion Ready Flags to
12                 save the additional i2c transaction, which will improve the bandwidth
13                 available for reading data. However, samples can be occasionally skipped
14                 or repeated, depending on the beat between the capture and conversion
15                 rates.
17 What:           /sys/bus/iio/devices/iio:deviceX/in_shunt_resistor
18 Date:           December 2015
19 KernelVersion:  4.4
20 Contact:        linux-iio@vger.kernel.org
21 Description:
22                 The value of the shunt resistor may be known only at runtime fom an
23                 eeprom content read by a client application. This attribute allows to
24                 set its value in ohms.