cy8c95x0_write_regs_mask
cy8c95x0_write_regs_mask(chip, CY8C95X0_INTMASK, chip->irq_mask, ones);
cy8c95x0_write_regs_mask(chip, CY8C95X0_DIRECTION, ones, irq_mask);
return cy8c95x0_write_regs_mask(chip, CY8C95X0_OUTPUT, bits, mask);