PL080_TC_CLEAR
writel(tc, pl08x->base + PL080_TC_CLEAR);
writel(0x000000FF, pl08x->base + PL080_TC_CLEAR);
writel(BIT(ch->id), pl08x->base + PL080_TC_CLEAR);
writel(BIT(ch->id), pl08x->base + PL080_TC_CLEAR);