Fix LineEvent timestamp doc

[mpi3d]

Fix documentation on LineEvent::timestamp().

According to the Linux documentation, the timestamp is CLOCK_MONOTONIC by default: gpio.h#L286.

Please see #68 comment.

[posborne]

The default clock used depends on the kernel version. torvalds/linux@26d060e notes that this change to the default was made with kernel 5.7, so a note to that effect may be nice.

[mpi3d]

The default clock used depends on the kernel version. torvalds/linux@26d060e notes that this change to the default was made with kernel 5.7, so a note to that effect may be nice.

Ok, thanks, I added a new commit for that.

[eldruin]

Great, thank you!
bors r+

[bors]

Build failed:

• build (1.46.0, x86_64-unknown-linux-gnu)

[eldruin]

Sorry, could you also raise the MSRV to 1.56 and note that change in the changelog?

[mpi3d]

bors r+

[bors]

🔒 Permission denied

Existing reviewers: click here to make mpi3d a reviewer

[mpi3d]

Anyway: done

[eldruin]

Thank you!
bors r+

[bors]

Build failed:

• build (1.56.0, x86_64-unknown-linux-gnu)

[mpi3d]

Guessing it needs 1.59

[eldruin]

It seems we have some more problems :/

[mpi3d]

@eldruin I force pushed a commit to fix it. Can you trigger a new build please?

[eldruin]

I fixed our CI in #71. Could you rebase this?

[mpi3d]

Done

[eldruin]

Thank you for everything!
bors r+

[bors]

Build succeeded!

The publicly hosted instance of bors-ng is deprecated and will go away soon.

If you want to self-host your own instance, instructions are here.
For more help, visit the forum.

If you want to switch to GitHub's built-in merge queue, visit their help page.

• build (1.59.0, x86_64-unknown-linux-gnu)
• build (stable, aarch64-unknown-linux-gnu)
• build (stable, arm-unknown-linux-gnueabi)
• build (stable, armv7-unknown-linux-gnueabihf)
• build (stable, i686-unknown-linux-gnu)
• build (stable, i686-unknown-linux-musl)
• build (stable, mips64el-unknown-linux-gnuabi64)
• build (stable, mips64-unknown-linux-gnuabi64)
• build (stable, mipsel-unknown-linux-gnu)
• build (stable, mips-unknown-linux-gnu)
• build (stable, powerpc64le-unknown-linux-gnu)
• build (stable, powerpc-unknown-linux-gnu)
• build (stable, s390x-unknown-linux-gnu)
• build (stable, x86_64-unknown-linux-gnu)
• build (stable, x86_64-unknown-linux-musl)
• checks