diff options
author | Julius Werner <jwerner@chromium.org> | 2020-08-05 15:27:11 -0700 |
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committer | Julius Werner <jwerner@chromium.org> | 2020-08-06 23:54:41 +0000 |
commit | 7450790558f3b1f85e9a11df252dd27f1047bfeb (patch) | |
tree | 4534b2e8d65d250686cd2268d5d9bd60fbd21078 /Makefile | |
parent | 0e0273a015f57e244015c80f0fa37192f1e569f3 (diff) |
gpio: Pull down HiZ pins after reading tristate GPIO strapping
People who know a lot more about electrons and stuff than I do tell me
that leaving a HiZ pin floating without a pull resistor may waste power.
So if we find a pin to be HiZ when reading tristate strapping GPIOs, we
should make sure the internal pull-down is enabled when we're done with
it. (For pins that are externally pulled high or low, we should continue
to leave the internal pull disabled instead.)
Signed-off-by: Julius Werner <jwerner@chromium.org>
Change-Id: I1669823c8a7faab536e0441cb4c6cfeb9f696189
Reviewed-on: https://review.coreboot.org/c/coreboot/+/44253
Reviewed-by: Douglas Anderson <dianders@chromium.org>
Reviewed-by: Alexandru Stan <amstan@google.com>
Reviewed-by: Furquan Shaikh <furquan@google.com>
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Diffstat (limited to 'Makefile')
0 files changed, 0 insertions, 0 deletions