diff options
| author | Maulik Shah <quic_mkshah@quicinc.com> | 2022-10-18 18:28:35 +0300 |
|---|---|---|
| committer | Bjorn Andersson <andersson@kernel.org> | 2022-11-10 06:14:21 +0300 |
| commit | 1498c503e19e587dbc26c8827633960a67594359 (patch) | |
| tree | 931db0d1fe6676a9f87aea608bd9e3ce42fa9c3c /drivers/base/power/domain_governor.c | |
| parent | 25092e6100acd7fcc72deed2583e63db683bb872 (diff) | |
| download | linux-1498c503e19e587dbc26c8827633960a67594359.tar.xz | |
PM: domains: Store the next hrtimer wakeup in genpd
The arch timer cannot wake up the Qualcomm Technologies, Inc. (QTI) SoCs
from the deeper CPUidle states. To be able to wakeup from these deeper
states, another always-on timer needs to be programmed through the so
called CONTROL_TCS.
As the RSC is part of CPU subsystem and the corresponding APSS RSC device
is attached to the cluster PM domain (through genpd), it holds the
responsibility to program the always-on timer, before entering any of these
deeper CPUidle states.
However, programming the timer requires information about the next hrtimer
wakeup for the cluster PM domain, which is currently only known by genpd.
Therefore, let's share this data through a new genpd helper function,
dev_pm_genpd_get_next_hrtimer().
Signed-off-by: Maulik Shah <quic_mkshah@quicinc.com>
Cc: "Rafael J. Wysocki" <rafael@kernel.org>
[Ulf: Reworked the code and updated the commit message]
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Tested-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org> # SM8450
Signed-off-by: Bjorn Andersson <andersson@kernel.org>
Link: https://lore.kernel.org/r/20221018152837.619426-5-ulf.hansson@linaro.org
Diffstat (limited to 'drivers/base/power/domain_governor.c')
| -rw-r--r-- | drivers/base/power/domain_governor.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/base/power/domain_governor.c b/drivers/base/power/domain_governor.c index 282a3a135827..cc2c3a5a6d35 100644 --- a/drivers/base/power/domain_governor.c +++ b/drivers/base/power/domain_governor.c @@ -375,6 +375,9 @@ static bool cpu_power_down_ok(struct dev_pm_domain *pd) if (idle_duration_ns <= 0) return false; + /* Store the next domain_wakeup to allow consumers to use it. */ + genpd->gd->next_hrtimer = domain_wakeup; + /* * Find the deepest idle state that has its residency value satisfied * and by also taking into account the power off latency for the state. |