cpu/sam0-common: rename mkr ldscript to more a generic name

[aabadie]

This is because this ldscript can be used with any samd21 with an Arduino compatible bootloader preflashed. The idea is just to use a more generic name for the ldscript file.

This is the case for all Arduino MKR boards, Adafruit Feather boards (see #7510) and others.

This PR should address the question of #7645.

[ynezz]

The idea is just to use a more generic name for the ldscript file.

Small nitpick :-) From my point of view, it's not generic linker script, it's linker script which targets SAMD21G18A MCU with Arduino bootloader pre-flashed, so probably the more appropriate linker filename would be samd21g18a_arduino_bootloader.ld ?

[aabadie]

probably the more appropriate linker filename would be samd21g18a_arduino_bootloader.ld ?

Good point, I buy it. Thanks!

[jnohlgard]

using the suffix _bootloader is a bit ambiguous. I mean it can also be interpreted as "a linker script to use when building a bootloader" instead of "a linker script to use when running the application from a bootloader".

Edit: To be constructive: I suggest adding a README.md file to the ldscripts directory to explain which script should be used for what.

[aabadie]

To be constructive: I suggest adding a README.md file to the ldscripts directory to explain which script should be used for what.

Added and comments welcome.

[jnohlgard]

Looks fine to me, but I don't have the hardware to test it.

[jnohlgard]

Missing newline at end of file

[aabadie]

Fixed and directly squashed.

[jnohlgard]

Thanks for adding the README

[aabadie]

It would be nice to merge this one, it's required for #7510.

[jnohlgard]

I did not test on actual hardware, but this is only a rename and should be working on real hardware if the build succeeded and it worked before.