Fix handling of TX complete interrupt in LPUART EDMA

[andresovela]

This PR fixes a potential issue that could happen if the user of the driver enables other UART interrupts.

Signed-off-by: Andres O. Vela andresovela@gmail.com

Prerequisites

• [x] I have checked latest main branch and the issue still exists.
• [x] I did not see it is stated as known-issue in release notes.
• [x] No similar GitHub issue is related to this change.
• [x] My code follows the commit guidelines of this project.
• [x] I have performed a self-review of my own code.
• [x] My changes generate no new warnings.
• [ ] I have added tests that prove my fix is effective or that my feature works.

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A clear and concise description for the change in this Pull Request and which issue is fixed.

Fixes # (issue)

Type of change (please delete options that are not relevant):

• [x] Bug fix (non-breaking change which fixes an issue)

Tests

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  • [ ] Build Test
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[mcuxsusan]

Hi @andresovela , thanks for your prompt action on the sign-off issue. Our developer is checking the contribution and feedback may be delayed, appreciate for your understanding.

[mcuxsusan]

Feedback from developer: _"When using the lpuart edma transactional layer, the interrupt is handled by the API LPUART_TransferEdmaHandleIRQ(the modified API in the PR) which is implemented inside the driver through double weak, the API is only dedicated to handle the transfer completion interrupt, so in LPUART_TransferCreateHandleEDMA the driver already disables all the interrupts. However if user enables any other interrupts after calling LPUARTTransferCreateHandleEDMA, the transfer flow may be aborted by mistake. The modification in the PR can prevent this from happening, we will also need to update document to remind user that it is forbidden to enable/disable any interrupts if using the transactional layer, regardless of the driver(uart/i2c.. etc) or the handling method(interrupt/edma)."

[mcuxsusan]

The change looks good, thanks again for your prompt action.