On Wed, Dec 06, 2017 at 03:26:47PM +0100, Ricard Wanderlof wrote: > On Wed, 6 Dec 2017, Mark Brown wrote: > > That just sounds like a regulator? I'd expect that just to be used as a > > supply as normal. > You mean as a DAPM widget? Or via a device which uses it. > > What audio specific control would this device be provdiing? > What it does provide is current sensing if the connected device draws too > much power, although it does not automatically shut off the connected > device if that is the case, so a small driver is required to shut down the > output in the case of overcurrent. There's also a requirement to be able > to read the overcurrent status. One approach is to implementet the whole > thing as an auxilliary device, with one ALSA control to control the power, > and a read only control to read the overcurrent status. That does sound like an auxiliary device that's a regulator consumer.
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