Commit 7e4d7593 authored by Alexandru Tachici's avatar Alexandru Tachici Committed by Jonathan Cameron
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Documentation: ABI: testing: ad7192: update sysfs docs 



Updated mainline documentation on ad7192 userspace sysfs.

Signed-off-by: default avatarAlexandru Tachici <alexandru.tachici@analog.com>
Signed-off-by: default avatarJonathan Cameron <Jonathan.Cameron@huawei.com>
parent 66614ab2

Documentation/ABI/testing/sysfs-bus-iio-adc-ad7192

+18 −6
Original line number Diff line number Diff line
@@ -2,17 +2,22 @@ What: /sys/bus/iio/devices/iio:deviceX/ac_excitation_en 
KernelVersion:

Contact:	linux-iio@vger.kernel.org

Description:

		Reading gives the state of AC excitation.

		Writing '1' enables AC excitation.

		This attribute, if available, is used to enable the AC

		excitation mode found on some converters. In ac excitation mode,

		the polarity of the excitation voltage is reversed on

		alternate cycles, to eliminate DC errors.



What:		/sys/bus/iio/devices/iio:deviceX/bridge_switch_en

KernelVersion:

Contact:	linux-iio@vger.kernel.org

Description:

		This bridge switch is used to disconnect it when there is a

		need to minimize the system current consumption.

		Reading gives the state of the bridge switch.

		Writing '1' enables the bridge switch.

		This attribute, if available, is used to close or open the

		bridge power down switch found on some converters.

		In bridge applications, such as strain gauges and load cells,

		the bridge itself consumes the majority of the current in the

		system. To minimize the current consumption of the system,

		the bridge can be disconnected (when it is not being used

		using the bridge_switch_en attribute.



What:		/sys/bus/iio/devices/iio:deviceX/in_voltagex_sys_calibration

KernelVersion:
@@ -21,6 +26,13 @@ Description: 
		Initiates the system calibration procedure. This is done on a

		single channel at a time. Write '1' to start the calibration.



What:		/sys/bus/iio/devices/iio:deviceX/in_voltage2-voltage2_shorted_raw

KernelVersion:

Contact:	linux-iio@vger.kernel.org

Description:

		Measure voltage from AIN2 pin connected to AIN(+)

		and AIN(-) shorted.



What:		/sys/bus/iio/devices/iio:deviceX/in_voltagex_sys_calibration_mode_available

KernelVersion:

Contact:	linux-iio@vger.kernel.org

drivers/staging/iio/Documentation/sysfs-bus-iio-ad7192

deleted100644 → 0
+0 −20
Original line number Diff line number Diff line 
What:		/sys/.../iio:deviceX/ac_excitation_en

KernelVersion:	3.1.0

Contact:	linux-iio@vger.kernel.org

Description:

		This attribute, if available, is used to enable the AC

		excitation mode found on some converters. In ac excitation mode,

		the polarity of the excitation voltage is reversed on

		alternate cycles, to eliminate DC errors.



What:		/sys/.../iio:deviceX/bridge_switch_en

KernelVersion:	3.1.0

Contact:	linux-iio@vger.kernel.org

Description:

		This attribute, if available, is used to close or open the

		bridge power down switch found on some converters.

		In bridge applications, such as strain gauges and load cells,

		the bridge itself consumes the majority of the current in the

		system. To minimize the current consumption of the system,

		the bridge can be disconnected (when it is not being used

		using the bridge_switch_en attribute.