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[TOPIC-GPIO] miscellaneous API documentation updates #19252

Merged
merged 2 commits into from
Oct 1, 2019
Merged

[TOPIC-GPIO] miscellaneous API documentation updates #19252

merged 2 commits into from
Oct 1, 2019

Commits on Sep 25, 2019

  1. gpio: put back deprecation comments 

    The comments identifying replacement API were inadvertently removed
along with the flag that triggers deprecation warnings.

Signed-off-by: Peter Bigot <[email protected]>
    @pabigot
    pabigot committed Sep 25, 2019
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  2. gpio: add error return when blocking might occur 

    External GPIO drivers may not be supported from interrupt context
because they involve blocking bus transactions.  Describe the return
value for this situation, and add the I/O error to operations where it
was missing.

Signed-off-by: Peter Bigot <[email protected]>
    @pabigot
    pabigot committed Sep 25, 2019
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