WM8994_CP_DYN_SRC_SEL_SHIFT
source = 2 << WM8994_CP_DYN_SRC_SEL_SHIFT;
source = 1 << WM8994_CP_DYN_SRC_SEL_SHIFT;
source = 0 << WM8994_CP_DYN_SRC_SEL_SHIFT;