hp_l_vol_control 1628 sound/soc/codecs/rt5645.c static const struct snd_kcontrol_new hp_l_vol_control = hp_l_vol_control 2207 sound/soc/codecs/rt5645.c SND_SOC_DAPM_SWITCH("HPOVOL L", SND_SOC_NOPM, 0, 0, &hp_l_vol_control),