iio: adc: adrv902x: add init cal and status attrs - #3526
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A few minor comments from my side.
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Expose the init calibration status readbacks through sysfs so a run can be inspected from userspace without a debugger. New read-only status attributes: init_cals_complete_check adi_adrv9025_InitCalsCheckCompleteGet() init_cals_all_status adi_adrv9025_InitCalsDetailedStatusGet() Both are registered for adrv9026 and adrv9029. While here, propagate the error code from adrv9025_dev_err() at the two existing call sites in adrv9025_phy_write_raw() that dropped it and returned the raw ADI status instead of an errno. Signed-off-by: Georgian Raul <Raul.Georgian@analog.com>
Add tracking_cals_all_status, a read-only sysfs attribute backed by adi_adrv9025_TrackingCalAllStateGet(), so the per-channel tracking calibration states and the aggregate calError can be read from userspace without a debugger. Add four more calibration enables, each setting its bit in the mask run by adi_adrv9025_InitCalsRun(): calibrate_orx_qec_en ADI_ADRV9025_ORX_QEC_INIT calibrate_orx_lo_delay_en ADI_ADRV9025_ORX_LO_DELAY calibrate_adc_en ADI_ADRV9025_ADC_TUNER calibrate_orx_adc_en ADI_ADRV9025_ORX_TIA All five are registered for adrv9026 and adrv9029. Signed-off-by: Georgian Raul <Raul.Georgian@analog.com>
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This PR implements the initial calibration IIO attributes and the
status functions for both initial and tracking calibrations.
adi_adrv9025_InitCalsDetailedStatusGet() gives the error code, how
many microseconds the last calibration took, what ran last time,
and what calibrations ran since power up. The last two are
per-channel bitmasks, decoded against
adi_adrv9025_InitCalibrations_e, which can be found in
adi_adrv9025_cals_types.h.
adi_adrv9025_TrackingCalAllStateGet() gives a 32-bit mask with one
bit per calibration instance, flagging which ones are in the error
state, plus the state of each of the 32 tracking calibrations
(8 types across 4 channels).
adi_adrv9025_InitCalsCheckCompleteGet() can be used to verify if
the init calibrations are completed. It returns a running flag,
which is 0 when the ARM has completed the calibrations or never
ran them and 1 while they are currently running, and separately a
3-bit ARM error code.
When the calibration is successful, the error code should always
be 0.
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