Bureaucrats, dave_user, Administrators
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Here below an example of device tree configuration used on standard DAVE's kit for the [[AXEL ULite SOM]]:
From the Carrier <code>imx6ul-lynxaxelulite-som0013-cb002fcb003a.dts</code> device tree:
<pre>
&uart2 uart3 {
pinctrl-names = "default";
pinctrl-0 = <&pinctrl_uart2_flowpinctrl_uart3>; fsl,uart-has-rtscts;
status = "okay";
};
&iomuxc {
pinctrl-names = "default";
pinctrl-0 = <&pinctrl_hog_gpios>;
imx6ul-lynx axelulite {
...
...
};
...
...
...
[ 0.424294437613] 2020000.serial: ttymxc0 at MMIO 0x2020000 (irq = 21, base_baud = 5000000) is a IMX[ 1.125015167221] console [ttymxc0] enabled[ 1.130189] 2024000.serial: ttymxc7 at MMIO 0x2024000 (irq = 22, base_baud = 5000000) is a IMX[ 1.140851] 21e8000.serial: ttymxc1 at MMIO 0x21e8000 (irq = 58, base_baud = 5000000) is a IMX[ 1.150972172839] 21ec000.serial: ttymxc2 at MMIO 0x21ec000 (irq = 5958, base_baud = 5000000) is a IMX
...
...
UART8 <-> ttymxc7
...
For exmaple, using a loopback HW connection (RX shortcircuited to TX on UART232 port) it is possibile to test the send and receive data using the <code>ttymxc2</code> device:
<pre class="workstation-terminal">
root@desk-mx6ul-axelulite:~# stty -F /dev/ttymxc7 ttymxc2 115200 -echoroot@desk-mx6ul-axelulite:~# cat /dev/ttymxc7 ttymxc2 &
[1] 331
root@desk-mx6ul-axelulite:~# echo "Test loopback" > /dev/ttymxc7ttymxc2root@desk-mx6ul-axelulitelynx:~#Test loopback
</pre>