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