Readd TIM21/TIM22 to l0xx series

[jamwaffles]

This is a partial revert of 0cb0f60 which I believe removed this line in error.

AN4013 Table 3. marks TIM21 and TIM22 as existing for nearly all l0xx devices so I think this PR is correct.

It does however state that TIM22 isn't available on l0x0 devices, but I'm not sure how to approach that change in this repo, so any guidance would be appreciated if we need to add that as a special case. The SVD file appears to have it present for even the l0x0 devices so maybe we don't need to worry about that.

This branch has been tested on a local copy of stm32l0xx-hal which compiles with the changes here.

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[adamgreig]

Thanks for this PR, sorry it sat untouched for a while!

Is there a reason to not just include tim21.yaml in the relevant device files (or even in tim_l0.yaml) but instead copy the contents in? And, it looks like you've removed the existing TI2_RMP field, but that's present on TIM21's OR in the reference manual.

[jamwaffles]

No worries! I'll take a look at implementing your comments tonight if I have time :)

Is there a reason to not just include tim21.yaml in the relevant device files (or even in tim_l0.yaml) but instead copy the contents in?

IIRC there were some issues but I don't recall what. I'll try that approach again and comment here if I refresh my memory.

And, it looks like you've removed the existing TI2_RMP field, but that's present on TIM21's OR in the reference manual.

Could you clarify "but that's present on TIM21's OR in the reference manual"? I can't make sense of that statement :/

[jamwaffles]

As mentioned in the commit comment, this is already present in tim_basic.yaml. tim21.yaml is only used in tim_l0 currently so I don't think this should cause any issues.

[jamwaffles]

Changes made, I'm now using tim21.yaml and I understand what you mean by the OR comment now - that's fixed too!

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[adamgreig]

Thanks!

bors merge

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