[PATCH 2/3] ARM: tegra: don't hard-code DEBUG_LL baud rate

[Thierry Reding]

On Mon, Nov 25, 2013 at 03:36:42PM -0700, Stephen Warren wrote:
> From: Stephen Warren <swarren at nvidia.com>
> 
> 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: Stephen Warren <swarren at nvidia.com>
> Tested-by: Paul Walmsley <pwalmsley at nvidia.com>
> ---
>  arch/arm/include/debug/tegra.S | 30 +++---------------------------
>  arch/arm/mach-tegra/tegra.c    |  4 +---
>  2 files changed, 4 insertions(+), 30 deletions(-)

Reviewed-by: Thierry Reding <treding at nvidia.com>
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