+static int unknown_info(struct snd_kcontrol *ctl,
+ struct snd_ctl_elem_info *info)
+{
+ info->type = SNDRV_CTL_ELEM_TYPE_ENUMERATED;
+ info->count = 1;
+ info->value.enumerated.items = 2;
+ if (info->value.enumerated.item > 1)
+ info->value.enumerated.item = 1;
+ sprintf(info->value.enumerated.name, "%u", info->value.enumerated.item);
+ return 0;
+}
+
+static int unknown_get(struct snd_kcontrol *ctl,
+ struct snd_ctl_elem_value *value)
+{
+ struct oxygen *chip = ctl->private_data;
+
+ value->value.enumerated.item[0] =
+ !!(oxygen_read16(chip, OXYGEN_GPIO_DATA) & GPIO_DX_UNKNOWN1);
+ return 0;
+}
+
+static int unknown_put(struct snd_kcontrol *ctl,
+ struct snd_ctl_elem_value *value)
+{
+ struct oxygen *chip = ctl->private_data;
+ u16 old_reg, new_reg;
+
+ spin_lock_irq(&chip->reg_lock);
+ old_reg = oxygen_read16(chip, OXYGEN_GPIO_DATA);
+ if (value->value.enumerated.item[0])
+ new_reg = old_reg | GPIO_DX_UNKNOWN1;
+ else
+ new_reg = old_reg & ~GPIO_DX_UNKNOWN1;
+ oxygen_write16(chip, OXYGEN_GPIO_DATA, new_reg);
+ spin_unlock_irq(&chip->reg_lock);
+ return old_reg != new_reg;
+}
+
+static const struct snd_kcontrol_new unknown_switch = {
+ .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
+ .name = "PanelConfig?",
+ .info = unknown_info,
+ .get = unknown_get,
+ .put = unknown_put,
+};
+