mode.c

case GPIO_MODE:

	ret = copy_from_user(&mdata, (struct gpio_data_mode __user *)arg, sizeof(struct gpio_data_mode));
	if (ret != 0) {
		printk(KERN_DEBUG "[MODE] Error copying data from userspace\n");
		return -EFAULT;
	}

	//get struct from userspace
	pin = mdata.pin;
	//validate pin & access
	val = readl(__io_address(GPIO_BASE + GPLEV0 + (pin/32)*4));
	//clear the status
	uint32_t newval = val & ~(7<<(((pin)%10)*3));
	writel(newval, __io_address(GPIO_BASE + (pin/10)*4));
	//if output set new value
	if (mdata.data == MODE_INPUT) {
		val = readl(__io_address(GPIO_BASE + GPLEV0 + (pin/32)*4));
		newval = val | (1<<(((pin)%10)*3));
		writel(newval, __io_address(GPIO_BASE + (pin/10)*4));
	}
	return 0;