dts: add gx51x pinctrl file

[lsd-he360]

Adds a seperate pinctrl file for gx51x family. This file shares many configurations with the g1x0x/g3x0x but supports additonal pins and peripherals.

The commit in this PR is cherry picked from TexasInstruments/msp-hal_ti@e3968fe

[lsd-he360]

@d-philpot, for awareness this is a PR to merge your gx51x pinctrl dts changes.

[lsd-he360]

The lp_mspm0g3519 board dts file was updated to include the mspm0gx51x-pinctrl.dtsi:

zephyrproject-rtos/zephyr#98962

[lsd-he360]

@ssekar15 @vaishnavachath

[d-philpot]

Looks good to me, @ssekar15 can you review?

[ssekar15]

@lsd-he360 I had a look into the pin configuration for g series, as far I checked most of them share the common base reference and difference is in additional pin on higher variant. I would suggest to cleanup with base common pinctl file which is included to add on for high variants with delta.

I could prepare a draft if needed

[d-philpot]

@ssekar15 I think maintaining a common pinctrl file might be added overhead and prone to mistakes. I generated this file with a script

[ssekar15]

@ssekar15 I think maintaining a common pinctrl file might be added overhead and prone to mistakes. I generated this file with a script

Common pinctrl is to avoid mistakes with multiple effort, streamline only difference for better understanding. Most of G-series SoC shares the same baseline, we could improve the script. Please attach the script and update the README.

[ssekar15]

@ssekar15 I think maintaining a common pinctrl file might be added overhead and prone to mistakes. I generated this file with a script

Common pinctrl is to avoid mistakes with multiple effort, streamline only difference for better understanding. Most of G-series SoC shares the same baseline, we could improve the script. Please attach the script and update the README.

@d-philpot please confirm that I can start work on refactor to avoid double effort.