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b424ec9533
The controller has mute/unmute capability and some bootloader may mute them at boot. If it's not handled, all things will seem to be working but no sound will come out of the speaker/headphone. Signed-off-by: Arnaud Patard <arnaud.patard@rtp-net.org> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>