TEGRA_UART_MCR_CTS_EN
tup->mcr_shadow |= TEGRA_UART_MCR_CTS_EN;
tup->mcr_shadow &= ~TEGRA_UART_MCR_CTS_EN;
if ((mcr & TEGRA_UART_MCR_CTS_EN) && (msr & UART_MSR_CTS))
if ((mcr & TEGRA_UART_MCR_CTS_EN) &&