On Fri, Mar 29, 2019 at 09:51:59AM +0800, tony.zou.hq@gmail.com wrote:

max98357a's enable pin need setting independently when max98357a is shared I2S with other codec.

add dai "max98357a-hifi" without pcm trigger, and use "Spk PA Switch" to set the enable pin.

This sounds like a really bad idea - if you have multiple CODECs on a single DAI link tell the core about it, don't try to bodge around it. There's support for multiple CODECs on a DAI link already.

+static const char * const ext_spk_text[] = {

• "Off", "On"

+};

Simple on/off switches should be normal switch controls, not enums.