reg_tx_sched
struct reg_tx_sched __iomem *reg_tx_sched;
if (chan->reg_tx_sched)
writel_relaxed(cfg->u.tx.priority, &chan->reg_tx_sched->prio);
chan->reg_tx_sched = dma->reg_tx_sched + channel;
dma->reg_tx_sched = pktdma_get_regs(dma, node, 3, &size);
if (IS_ERR(dma->reg_tx_sched))
return PTR_ERR(dma->reg_tx_sched);
max_tx_sched = size / sizeof(struct reg_tx_sched);
struct reg_tx_sched __iomem *reg_tx_sched;