On 01/26/2016 09:59 AM, Ralf Ramsauer wrote:

This patch enables the APB DMA high speed UARTs of the Jetson TK1. So
far, they were only enabled in NVidia's official BSP.

Those additional UARTs are exposed on the expansion connector J3A2:

  UART1:
   Pin 41: BR_UART1_TXD
   Pin 44: BR_UART1_RXD

  UART2:
   Pin 65: UART2_RXD
   Pin 68: UART2_TXD
   Pin 71: UART2_CTS_L
   Pin 74: UART2_RTS_L

The series,
Acked-by: Stephen Warren <redacted>


As an aside, this is perfectly OK, but I wonder why you chose to use 
compatible=nvidia,tegra124-hsuart rather than 
compatible=nvidia,tegra124-uart. The -hsuart driver has had less testing 
upstream, whereas the regular -uart driver is heavily used for the main 
serial console. I assume you tested the new driver when enabling the 
ports:-)