Mark bits() as safe if a register has no reserved bits

[steelman]

If a register has no fields but its write constraints allow full range of values to be written, then mark bits() as safe.

[rust-highfive]

Thanks for the pull request, and welcome! The Rust team is excited to review your changes, and you should hear from @Emilgardis (or someone else) soon.

Please see the contribution instructions for more information.

[steelman]

@Rahix, you may be interested in this patch.

[Emilgardis]

wasn't this implemented before? ah my bad, was thinking of the specific writes, this is for the register

[burrbull]

You could reuse unsafety function. +changelog

[steelman]

@burrbull Can you explain?

[burrbull]

https://github.com/rust-embedded/svd2rust/blob/2d799693b4d3f20ad757010d008e565172f01d37/src/generate/register.rs#L972

https://github.com/rust-embedded/svd2rust/blob/2d799693b4d3f20ad757010d008e565172f01d37/src/generate/register.rs#L783

[steelman]

OK, I will.

[steelman]

I messed up. Moment.

[burrbull]

bors r+

[bors[bot]]

Build failed:

• Rustfmt

[burrbull]

format and rebase, please

[burrbull]

bors r+

[bors[bot]]

Build succeeded:

• CI
• Rustfmt