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| author | Erick Shepherd <erick.shepherd@ni.com> | 2025-03-14 22:50:21 +0300 |
|---|---|---|
| committer | Ulf Hansson <ulf.hansson@linaro.org> | 2025-03-20 17:07:38 +0300 |
| commit | 31e75ed964582257f59156ce6a42860e1ae4cc39 (patch) | |
| tree | 7431cb85efde3a44d317ba5a7d7a64b9bd144615 /lib/debugobjects.c | |
| parent | f4dfef81e97170276958ca976ad16575b8b12682 (diff) | |
| download | linux-31e75ed964582257f59156ce6a42860e1ae4cc39.tar.xz | |
mmc: host: Wait for Vdd to settle on card power off
The SD spec version 6.0 section 6.4.1.5 requires that Vdd must be
lowered to less than 0.5V for a minimum of 1 ms when powering off a
card. Increase wait to 15 ms so that voltage has time to drain down
to 0.5V and cards can power off correctly. Issues with voltage drain
time were only observed on Apollo Lake and Bay Trail host controllers
so this fix is limited to those devices.
Signed-off-by: Erick Shepherd <erick.shepherd@ni.com>
Acked-by: Adrian Hunter <adrian.hunter@intel.com>
Link: https://lore.kernel.org/r/20250314195021.1588090-1-erick.shepherd@ni.com
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Diffstat (limited to 'lib/debugobjects.c')
0 files changed, 0 insertions, 0 deletions