IOEXP_MIC_BIAS
output_init_value |= IOEXP_MIC_BIAS;
output_init_value &= ~IOEXP_MIC_BIAS;
uint8_t reg = ioexp_gpio_pin_get(sc, IOEXP_MIC_BIAS);
ioexp_gpio_pin_write(sc, IOEXP_MIC_BIAS, GPIO_PIN_HIGH,
ioexp_gpio_pin_write(sc, IOEXP_MIC_BIAS, GPIO_PIN_LOW,