snd_s1810c_switch_init
ret = snd_s1810c_switch_init(mixer, &snd_s1810c_line_sw);
ret = snd_s1810c_switch_init(mixer, &snd_s1810c_mute_sw);
ret = snd_s1810c_switch_init(mixer, &snd_s1810c_48v_sw);
ret = snd_s1810c_switch_init(mixer, &snd_s1810c_ab_sw);
ret = snd_s1810c_switch_init(mixer, &snd_s1824c_mono_sw);