DTS file for the esp32

[Michael2196]

Describe the bug
I'm working on developing the device tree for the esp32 (gpio). To do so, I'm trying to understand the Uart example already developed under the esp32 device tree. However, I'm having trouble understanding some basic concepts. In the esp32.dts file, under &uart0, I modified the current speed from 115200 to 9600. To my surprise, after flashing the esp32 the baud rate is still at 115200.

To Reproduce
Steps to reproduce the behavior:

1. cd /samples/helloworld/
   2.mkdir build; cd build
2. cmake -GNinja -DESP_IDF_PATH=$ESP_IDF_PATH -DBOARD=esp32 ..
3. ninja && west flash -d ./ --skip-rebuild --esp-device /dev/ttyACM0'
4. minicom -D /dev/ttyUSB0 -b 9600

Expected behavior
Hello World on the console

Impact
Can't work on the device tree

Environment (please complete the following information):

• OS: (Linux)
• Toolchain (Zephyr SDK, espressif ...)

Additional context
I'm still trying to understand the concept of device tree. This would be a big help.
Thank you

[galak]

This is because the driver doesn't support setting the baud rate at all. Take a look at drivers/serial/uart_esp32.c