TEGRA_USB_PORTSC1
.portsc1_offset = TEGRA_USB_PORTSC1,
val = readl_relaxed(base + TEGRA_USB_PORTSC1);
writel_relaxed(val, base + TEGRA_USB_PORTSC1);
val = readl_relaxed(base + TEGRA_USB_PORTSC1) & ~PORT_RWC_BITS;
writel_relaxed(val, base + TEGRA_USB_PORTSC1);