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 Signed-off-by: Nuno Sá <nuno.sa@xxxxxxxxxx> --- .../ABI/testing/sysfs-bus-iio-dac-ltc2688 | 80 +++++++++++++++++++ MAINTAINERS | 1 + 2 files changed, 81 insertions(+) create mode 100644 Documentation/ABI/testing/sysfs-bus-iio-dac-ltc2688 diff --git a/Documentation/ABI/testing/sysfs-bus-iio-dac-ltc2688 b/Documentation/ABI/testing/sysfs-bus-iio-dac-ltc2688 new file mode 100644 index 000000000000..38d1df81c6dc --- /dev/null +++ b/Documentation/ABI/testing/sysfs-bus-iio-dac-ltc2688 @@ -0,0 +1,80 @@ +What: /sys/bus/iio/devices/iio:deviceX/out_voltageY_dither_en +KernelVersion: 5.17 +Contact: linux-iio@xxxxxxxxxxxxxxx +Description: + Dither enable. Write 1 to enable dither or 0 to disable it. + +What: /sys/bus/iio/devices/iio:deviceX/out_voltageY_dither_raw +KernelVersion: 5.17 +Contact: linux-iio@xxxxxxxxxxxxxxx +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: 5.17 +Contact: linux-iio@xxxxxxxxxxxxxxx +Description: + Available range for dither raw amplitude values. + +What: /sys/bus/iio/devices/iio:deviceX/out_voltageY_dither_offset +KernelVersion: 5.17 +Contact: linux-iio@xxxxxxxxxxxxxxx +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: 5.17 +Contact: linux-iio@xxxxxxxxxxxxxxx +Description: + Sets the dither signal frequency. + +What: /sys/bus/iio/devices/iio:deviceX/out_voltageY_dither_frequency_available +KernelVersion: 5.17 +Contact: linux-iio@xxxxxxxxxxxxxxx +Description: + Returns the available values for the dither frequency. + +What: /sys/bus/iio/devices/iio:deviceX/out_voltageY_dither_phase +KernelVersion: 5.17 +Contact: linux-iio@xxxxxxxxxxxxxxx +Description: + Sets the dither signal phase. + +What: /sys/bus/iio/devices/iio:deviceX/out_voltageY_dither_phase_available +KernelVersion: 5.17 +Contact: linux-iio@xxxxxxxxxxxxxxx +Description: + Returns the available values for the dither phase. + +What: /sys/bus/iio/devices/iio:deviceX/out_voltageY_toggle_en +KernelVersion: 5.17 +Contact: linux-iio@xxxxxxxxxxxxxxx +Description: + Toggle enable. Write 1 to enable toggle or 0 to disable it. + +What: /sys/bus/iio/devices/iio:deviceX/out_voltageY_raw0 +KernelVersion: 5.17 +Contact: linux-iio@xxxxxxxxxxxxxxx +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. The same scale, offset, etc applies. + +What: /sys/bus/iio/devices/iio:deviceX/out_voltageY_raw1 +KernelVersion: 5.17 +Contact: linux-iio@xxxxxxxxxxxxxxx +Description: + Same as out_voltageY_raw0 but referring to the DAC output code + in INPUT_B. + +What: /sys/bus/iio/devices/iio:deviceX/out_voltageY_symbol +KernelVersion: 5.17 +Contact: linux-iio@xxxxxxxxxxxxxxx +Description: + Performs a SW toggle. This attribute is specific to toggle + enabled channels and allows to toggle between out_voltageY_raw + and out_voltageY_raw1 through software. Writing 0 will select + out_voltageY_raw while 1 selects out_voltageY_raw1. diff --git a/MAINTAINERS b/MAINTAINERS index 16e344d52b1e..16a7fd7f98ee 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -11187,6 +11187,7 @@ M: Nuno Sá <nuno.sa@xxxxxxxxxx> L: linux-iio@xxxxxxxxxxxxxxx S: Supported W: http://ez.analog.com/community/linux-device-drivers +F: Documentation/ABI/testing/sysfs-bus-iio-dac-ltc2688 F: drivers/iio/dac/ltc2688.c LTC2947 HARDWARE MONITOR DRIVER -- 2.33.1
