isi_readl
status = isi_readl(isi, ISI_STATUS);
mask = isi_readl(isi, ISI_INTMASK);
cfg1 = isi_readl(isi, ISI_CFG1);
if (isi_readl(isi, ISI_STATUS) & ISI_CTRL_CDC) {
isi_readl(isi, ISI_STATUS);
while ((isi_readl(isi, ISI_STATUS) & ISI_CTRL_CDC) &&