REG_IS
tc3589x_gpio->regs[REG_IS][regoffset] |= mask;
tc3589x_gpio->regs[REG_IS][regoffset] &= ~mask;
[REG_IS] = TC3589x_GPIOIS0,
is = fas216_readb(info, REG_IS);
is = fas216_readb(info, REG_IS);