KBC_INT_0
val = (readl(kbc->mmio + KBC_INT_0) >> 4) & 0xf;
val = readl(kbc->mmio + KBC_INT_0);
writel(val, kbc->mmio + KBC_INT_0);
val = readl(kbc->mmio + KBC_INT_0);
writel(0x7, kbc->mmio + KBC_INT_0);
writel(0x7, kbc->mmio + KBC_INT_0);