TEGRA_UTC_ENABLE
tegra_utc_tx_writel(tup, 0x0, TEGRA_UTC_ENABLE);
tegra_utc_tx_writel(tup, TEGRA_UTC_ENABLE_CLIENT_ENABLE, TEGRA_UTC_ENABLE);
tegra_utc_rx_writel(tup, TEGRA_UTC_ENABLE_CLIENT_ENABLE, TEGRA_UTC_ENABLE);
tegra_utc_rx_writel(tup, 0x0, TEGRA_UTC_ENABLE);
writel(TEGRA_UTC_ENABLE_CLIENT_ENABLE, device->port.membase + TEGRA_UTC_ENABLE);