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For dual external multiplexer configurations this is incorrect: >> simultaneous sampling mode is required so that ADC-A samples through >> the mux on VAUX[0-7] while ADC-B simultaneously samples through the >> mux on VAUX[8-15]. In continuous mode only ADC-A is active, so >> VAUX[8-15] channels return incorrect data. >> >> Since postdisable is also called from xadc_probe() to set the initial >> idle state, the wrong sequencer mode is active from the moment the >> driver loads. >> >> The preenable path already uses xadc_get_seq_mode() which returns >> SIMULTANEOUS for dual mux. Fix postdisable to do the same. >> >> Fixes: bdc8cda1d010 ("iio:adc: Add Xilinx XADC driver") >> Cc: stable@vger.kernel.org >> Signed-off-by: Christofer Jonason > > I'll leave this on list for a little longer as I'd really like a confirmation > of this one from the AMD Xilinx folk. Salih/Conall: Please look at this patch and provide your comment or tag. Thanks, Michal