52302f87d0
Define the sysfs interface for toggle or dither capable channels. Dither capable channels will have the extended interface: * out_voltageY_dither_en * out_voltageY_dither_raw * out_voltageY_dither_offset * out_voltageY_dither_raw_available * out_voltageY_dither_frequency * out_voltageY_dither_frequency_available * out_voltageY_dither_phase * out_voltageY_dither_phase_available Toggle enabled channels will have: * out_voltageY_toggle_en * out_voltageY_raw0 * out_voltageY_raw1 * out_voltageY_symbol The common interface present in all channels is: * out_voltageY_raw (not present in toggle enabled channels) * out_voltageY_raw_available * out_voltageY_powerdown * out_voltageY_scale * out_voltageY_offset * out_voltageY_calibbias * out_voltageY_calibscale Signed-off-by: Nuno Sá <nuno.sa@analog.com> Link: https://lore.kernel.org/r/20220225130129.69-3-nuno.sa@analog.com Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
3.0 KiB
What: /sys/bus/iio/devices/iio:deviceX/out_voltageY_dither_en KernelVersion: 5.18 Contact: linux-iio@vger.kernel.org Description: Dither enable. Write 1 to enable dither or 0 to disable it. This is useful for changing the dither parameters. They way it should be done is:
- disable dither operation;
- change dither parameters (eg: frequency, phase...);
- enabled dither operation
What: /sys/bus/iio/devices/iio:deviceX/out_voltageY_dither_raw KernelVersion: 5.18 Contact: linux-iio@vger.kernel.org Description: This raw, unscaled value refers to the dither signal amplitude. The same scale as in out_voltageY_raw applies. However, the offset might be different as it's always 0 for this attribute.
What: /sys/bus/iio/devices/iio:deviceX/out_voltageY_dither_raw_available KernelVersion: 5.18 Contact: linux-iio@vger.kernel.org Description: Available range for dither raw amplitude values.
What: /sys/bus/iio/devices/iio:deviceX/out_voltageY_dither_offset KernelVersion: 5.18 Contact: linux-iio@vger.kernel.org Description: Offset applied to out_voltageY_dither_raw. Read only attribute always set to 0.
What: /sys/bus/iio/devices/iio:deviceX/out_voltageY_dither_frequency KernelVersion: 5.18 Contact: linux-iio@vger.kernel.org Description: Sets the dither signal frequency. Units are in Hz.
What: /sys/bus/iio/devices/iio:deviceX/out_voltageY_dither_frequency_available KernelVersion: 5.18 Contact: linux-iio@vger.kernel.org Description: Returns the available values for the dither frequency.
What: /sys/bus/iio/devices/iio:deviceX/out_voltageY_dither_phase KernelVersion: 5.18 Contact: linux-iio@vger.kernel.org Description: Sets the dither signal phase. Units are in Radians.
What: /sys/bus/iio/devices/iio:deviceX/out_voltageY_dither_phase_available KernelVersion: 5.18 Contact: linux-iio@vger.kernel.org Description: Returns the available values for the dither phase.
What: /sys/bus/iio/devices/iio:deviceX/out_voltageY_toggle_en KernelVersion: 5.18 Contact: linux-iio@vger.kernel.org Description: Toggle enable. Write 1 to enable toggle or 0 to disable it. This is useful when one wants to change the DAC output codes. The way it should be done is:
- disable toggle operation;
- change out_voltageY_raw0 and out_voltageY_raw1;
- enable toggle operation.
What: /sys/bus/iio/devices/iio:deviceX/out_voltageY_raw0 What: /sys/bus/iio/devices/iio:deviceX/out_voltageY_raw1 KernelVersion: 5.18 Contact: linux-iio@vger.kernel.org Description: It has the same meaning as out_voltageY_raw. This attribute is specific to toggle enabled channels and refers to the DAC output code in INPUT_A (_raw0) and INPUT_B (_raw1). The same scale and offset as in out_voltageY_raw applies.
What: /sys/bus/iio/devices/iio:deviceX/out_voltageY_symbol KernelVersion: 5.18 Contact: linux-iio@vger.kernel.org Description: Performs a SW toggle. This attribute is specific to toggle enabled channels and allows to toggle between out_voltageY_raw0 and out_voltageY_raw1 through software. Writing 0 will select out_voltageY_raw0 while 1 selects out_voltageY_raw1.