USBSS_W1
reg = cdns_ti_readl(data, USBSS_W1);
cdns_ti_writel(data, USBSS_W1, reg);
reg = cdns_ti_readl(data, USBSS_W1);
cdns_ti_writel(data, USBSS_W1, reg);
cdns_ti_writel(data, USBSS_W1, reg);
w1 = cdns_ti_readl(data, USBSS_W1);