WM8993_DC_SERVO_0
case WM8993_DC_SERVO_0:
case WM8993_DC_SERVO_0:
WM8993_DC_SERVO_0,
snd_soc_component_write(component, WM8993_DC_SERVO_0, 0);
snd_soc_component_write(component, WM8993_DC_SERVO_0, val);
reg = snd_soc_component_read(component, WM8993_DC_SERVO_0);