Nitrogen8m SOM - Boundary devices

[srinu_inaganti]

Hi,

1. I want use UART1 for RS232 communication. for RTS and CTS lines i want use UART4_Tx and UART_Rx. Is that the right way to do ? How to change the device tree for this configuration.

2. And also anyone help me to write a device tree changes procedure to connect I2C expander to I2C3 bus. 

3. How to write a device tree for registering the pins for GPIO.

Thanks in Advance,

Srinu Inaganti

[igorpadykov]

Hi Srinu

from Reference Manual UART1 RTS and CTS are available on UART3, not UART4

both UART3,4 are used on board:

linux-imx6/imx8mq-nitrogen8m_som.dts at boundary-imx_4.14.x_2.0.0_ga · boundarydevices/linux-imx6 · ... 

for device tree customization one can look at

https://boundarydevices.com/mx6-device-tree-customization/ 

This board was produced by boundary devices and issue may be posted on its

forum: https://boundarydevices.com/wiki/nitrogen8m-som/ 

Best regards
igor
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