HW_GPIOB_INTFLAG
iowrite32be(BIT(data->hwirq), hlwd->regs + HW_GPIOB_INTFLAG);
iowrite32be(0xffffffff, hlwd->regs + HW_GPIOB_INTFLAG);
pending = ioread32be(hlwd->regs + HW_GPIOB_INTFLAG);
iowrite32be(emulated_pending, hlwd->regs + HW_GPIOB_INTFLAG);