• Stephen Warren's avatar
    ARM: tegra: don't hard-code DEBUG_LL baud rate · 2f1d70af
    Stephen Warren authored
    Stop writing to the UART clock divider registers in the Tegra DEBUG_LL
    code. This allows the DEBUG_LL output to use whatever baud rate was set
    up by the bootloader. Some users are using higher rates than 115200.
    
    This removes the only usage of tegra_uart_config[3], so reduce the size
    allocated for that array.
    
    Finally, fix busyuart() so that it only waits for THRE and not TEMT. For
    some reason, TEMT doesn't get asserted (at least on Tegra30 Beaver) at
    9600 baud, even though it does at 115200 baud. This sounds like a HW bug,
    but I haven't investigated. For reference, U-Boot's serial code has
    always only checked THRE, and not checked TEMT.
    Signed-off-by: default avatarStephen Warren <swarren@nvidia.com>
    Tested-by: default avatarPaul Walmsley <pwalmsley@nvidia.com>
    Reviewed-by: default avatarThierry Reding <treding@nvidia.com>
    2f1d70af
tegra.S 6.93 KB