NetBSD/sys/dev/pad
nakayama 276930195c pad(4) mixer has only 1 channel, so return EINVAL in the case other than 1.
This fixes the following strange output of mixerctl(1):

        outputs.master=255,0
        inputs.dac=255,0
2018-09-25 06:55:23 +00:00
..
files.pad Add common audio converters for software volume control. Only supports 2014-11-18 01:53:17 +00:00
pad.c pad(4) mixer has only 1 channel, so return EINVAL in the case other than 1. 2018-09-25 06:55:23 +00:00
padvar.h Pad is now clones its device, attaching upon open and detaching upon close. 2017-07-01 23:31:19 +00:00