GPIO_PIN_CARD_ENABLE
| (1 << GPIO_PIN_CARD_ENABLE)); /* disable */
reg &= ~(3 << (GPIO_PIN_CARD_ENABLE * 2));
reg |= (1 << (GPIO_PIN_CARD_ENABLE * 2)); /* output */
reg &= ~(1 << GPIO_PIN_CARD_ENABLE);
reg |= (1 << GPIO_PIN_CARD_ENABLE);