Enable UART 10 on BeagleBone AI running TI Linux SDK

[than...@gmail.com]

Hello team,

I was trying to enable UART 10 on my BBAI running TI Linux SDK by adding pinmux control node for UART 10 to am5729-beagleboneai.dts file as follow

&dra7_pmx_core { 

uart10_pins: pinmux_uart10_pins {

pinctrl-single,pins = <

DRA7XX_CORE_IOPAD(0x3544, MUX_MODE15) /*driver off shared pin*/

DRA7XX_CORE_IOPAD(0x368C, PIN_OUTPUT_PULLUP | MUX_MODE3) /* uart10_txd.uart10_txd */

DRA7XX_CORE_IOPAD(0x3688, PIN_INPUT_PULLUP | MUX_MODE3) /* uart10_rxd.uart10_rxd */

>;

};

}; 

 &uart10 {

pinctrl-names = "default";

pinctrl-0 = <&uart10_pins>;

status = "okay";

};

with this configuration, UART 10 device was registered under /dev/ttyS9 node. However running a basic 'echo' and 'cat' on this dev didn't give correct result:

- Test model: loopback Tx <--> Rx

- Send '1234'

am57xx-evm:~# echo '1234' > /dev/ttyS9

- Receive data

am57xx-evm:~# cat /dev/ttyS9
1234

1234



1234

1234

=> This is not correct since we expect to receive a single '1234' while we got many of this.

Is there anybody running into this issue and know how to fix it.

Thanks in advance

th