WM8996_HPSEL_GPIO 126 sound/soc/samsung/speyside.c gpio_direction_output(WM8996_HPSEL_GPIO, speyside_jack_polarity); WM8996_HPSEL_GPIO 154 sound/soc/samsung/speyside.c ret = gpio_request(WM8996_HPSEL_GPIO, "HP_SEL"); WM8996_HPSEL_GPIO 157 sound/soc/samsung/speyside.c gpio_direction_output(WM8996_HPSEL_GPIO, speyside_jack_polarity);