On Wed, Oct 16, 2019 at 02:51:44PM -0700, Greg Kroah-Hartman wrote:
> From: Oleksandr Suvorov <oleksandr.suvorov@toradex.com>
> 
> commit 694b14554d75f2a1ae111202e71860d58b434a21 upstream.
> 
> This control mute/unmute the ADC input of SGTL5000
> using its CHIP_ANA_CTRL register.

This seems like a new feature and not an obvious candidate for stable?