PDC_IRQ_ROUTE
pdc_write(priv, PDC_IRQ_ROUTE, priv->irq_route);
pdc_write(priv, PDC_IRQ_ROUTE, priv->irq_route);
pdc_write(priv, PDC_IRQ_ROUTE, priv->irq_route);
pdc_write(priv, PDC_IRQ_ROUTE, priv->irq_route);
gc->chip_types[0].regs.mask = PDC_IRQ_ROUTE;