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According to ADI, changing PMON_CONFIG while the ADC is running can have unexpected results. ADI recommends halting the ADC with PMON_CONTROL before setting PMON_CONFIG and then resume after. Follow ADI recommendation and disable ADC while PMON_CONFIG is updated. Signed-off-by: Guenter Roeck <linux@roeck-us.net> Link: https://lore.kernel.org/r/20230614163605.3688964-3-linux@roeck-us.net Signed-off-by: Guenter Roeck <linux@roeck-us.net>