diff options
| author | Alex Elder <elder@linaro.org> | 2022-02-01 18:02:05 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2022-04-20 10:34:05 +0300 |
| commit | 8ff8bdb8c92d639ea5086db1b2cd76bf7bcbc9c1 (patch) | |
| tree | 17a9038f003418b7e48925d5d75b6edf11b328af /fs | |
| parent | 587ced6b8cf350616728e17cbcde9ae8a333122a (diff) | |
| download | linux-8ff8bdb8c92d639ea5086db1b2cd76bf7bcbc9c1.tar.xz | |
net: ipa: request IPA register values be retained
commit 34a081761e4e3c35381cbfad609ebae2962fe2f8 upstream.
In some cases, the IPA hardware needs to request the always-on
subsystem (AOSS) to coordinate with the IPA microcontroller to
retain IPA register values at power collapse. This is done by
issuing a QMP request to the AOSS microcontroller. A similar
request ondoes that request.
We must get and hold the "QMP" handle early, because we might get
back EPROBE_DEFER for that. But the actual request should be sent
while we know the IPA clock is active, and when we know the
microcontroller is operational.
Fixes: 1aac309d3207 ("net: ipa: use autosuspend")
Signed-off-by: Alex Elder <elder@linaro.org>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'fs')
0 files changed, 0 insertions, 0 deletions