Unable to find a pinctrl for SAMD21 that is included in mainline boards.

[Dark1886]

I see in many .dts files it has the following include line at the top, but I can't seem to find this file located anywhere. Is this some remaining line from an older commit or am I just missing some important information here?

#include <dt-bindings/pinctrl/samd21-da1gXabcd-pinctrl.h>

[nandojve]

Zephyr uses a lot of companion project. In general, each SoC have a hal_ that define low level.
You should read Zephyr documentation and follow initial steps at https://docs.zephyrproject.org/latest/develop/getting_started/index.html

[Lindenk]

I also can't seem to find this header anywhere. Also not to be mean, but including a link to the getting started guide does not answer the question and is condescending at best.

[kartben]

You would typically find these files in the HAL for your particular SOC. It's not part of the Zephyr source tree, but rather one of the modules pulled by west in your workspace. Look for zephyrproject/modules/hal/atmel, in your case, and there you'll find your file.

[IvanVeloz]

It's on zephyrproject/modules/hal/atmel/include/dt-bindings/pinctrl/samd21-da1gXabcd-pinctrl.h