[PATCH 0/5] ASoC: Map BTN_0 for Android Headsets to KEY_PLAYPAUSE

[Benson Leung]

The Android 3.5mm Headset jack specification mentions that BTN_0 should         
be mapped to KEY_MEDIA, but this is less logical than KEY_PLAYPAUSE,            
which has much broader userspace support.                                       
                                                                                
For example, the Chrome OS userspace now supports KEY_PLAYPAUSE to toggle       
play/pause of videos and audio, but does not handle KEY_MEDIA.                  
                                                                                
Furthermore, Android itself now supports KEY_PLAYPAUSE equivalently, as the     
new USB headset spec requires KEY_PLAYPAUSE for BTN_0.                          
https://source.android.com/devices/accessories/headset/usb-headset-spec

 [PATCH 1/5] ASoC: Intel: kbl_rt5663_rt5514_max98927: Map BTN_0 to
 [PATCH 2/5] ASoC: Intel: kbl_rt5663_max98927: Map BTN_0 to
 [PATCH 3/5] ASoC: ts3a227e: Map BTN_0 to KEY_PLAYPAUSE
 [PATCH 4/5] ASoC: rk3399_gru_sound: Map BTN_0 to KEY_PLAYPAUSE
 [PATCH 5/5] ASoC: qcom: apq8016-sbc: Map BTN_0 to KEY_PLAYPAUSE