GPIO_PGCON
pgcon = bus_space_read_4(iot, gpioh, GPIO_PGCON);
bus_space_write_4(iot, gpioh, GPIO_PGCON, pgcon);
pgcon = bus_space_read_4(iot, gpioh, GPIO_PGCON);
bus_space_write_4(iot, gpioh, GPIO_PGCON, pgcon);
gpio = GPIO_PGCON;
data = bus_space_read_4(sc->iot, sc->card_ioh, GPIO_PGCON);
bus_space_write_4(sc->iot, sc->card_ioh, GPIO_PGCON, data);
pgcon = bus_space_read_4(iot, gpioh, GPIO_PGCON);
bus_space_write_4(iot, gpioh, GPIO_PGCON, pgcon);
pgcon = bus_space_read_4(iot, gpioh, GPIO_PGCON);
bus_space_write_4(iot, gpioh, GPIO_PGCON, pgcon);
data = bus_space_read_4(iot, gpio_ioh, GPIO_PGCON);
bus_space_write_4(iot, gpio_ioh, GPIO_PGCON, data);
IOW(S3C2410_GPIO_BASE+GPIO_PGCON, _C(3,3,3,3,A,O,O,O,3,3,3,3,A,3,A,A));
data = *(volatile uint32_t*)(S3C2440_GPIO_BASE+GPIO_PGCON);
*(volatile uint32_t*)(S3C2440_GPIO_BASE+GPIO_PGCON) = data;