XWT_TWCSR0_OFFSET
control_status_reg = ioread32(xdev->base + XWT_TWCSR0_OFFSET);
iowrite32(control_status_reg, xdev->base + XWT_TWCSR0_OFFSET);
control_status_reg = ioread32(xdev->base + XWT_TWCSR0_OFFSET);
xdev->base + XWT_TWCSR0_OFFSET);
control_status_reg = ioread32(xdev->base + XWT_TWCSR0_OFFSET);
xdev->base + XWT_TWCSR0_OFFSET);