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| author |   Ulf Hansson <ulf.hansson@linaro.org> | 2025-07-01 13:47:20 +0200 |
|---|---|---|
| committer | Ulf Hansson <ulf.hansson@linaro.org> | 2025-07-09 13:29:41 +0200 |
| commit | 3b7b8acacf372945b4855a136634775c064a57f8 (patch) | |
| tree | 5ecbb7dca7e72095aa88a048e842b1da0e757713 /include | |
| parent | driver core: Export get_dev_from_fwnode() (diff) | |
| download | wireguard-linux-3b7b8acacf372945b4855a136634775c064a57f8.tar.xz wireguard-linux-3b7b8acacf372945b4855a136634775c064a57f8.zip | |
pmdomain: core: Add common ->sync_state() support for genpd providers
If the genpd provider's fwnode doesn't have an associated struct device
with it, we can make use of the generic genpd->dev and it corresponding
driver internally in genpd to manage ->sync_state().
More precisely, while adding a genpd OF provider let's check if the fwnode
has a device and if not, make the preparation to handle ->sync_state()
internally through the genpd_provider_driver and the genpd_provider_bus.
Note that, genpd providers may opt out from this behaviour by setting the
GENPD_FLAG_NO_SYNC_STATE config options for the genpds in question.
Suggested-by: Saravana Kannan <saravanak@google.com>
Tested-by: Hiago De Franco <hiago.franco@toradex.com> # Colibri iMX8X
Tested-by: Tomi Valkeinen <tomi.valkeinen@ideasonboard.com> # TI AM62A,Xilinx ZynqMP ZCU106
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Link: https://lore.kernel.org/r/20250701114733.636510-19-ulf.hansson@linaro.org
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/pm_domain.h | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/include/linux/pm_domain.h b/include/linux/pm_domain.h index 9329554b9c4a..d68e07dadc99 100644 --- a/include/linux/pm_domain.h +++ b/include/linux/pm_domain.h @@ -133,6 +133,12 @@ enum genpd_notication { GENPD_NOTIFY_ON, }; +enum genpd_sync_state { + GENPD_SYNC_STATE_OFF = 0, + GENPD_SYNC_STATE_SIMPLE, + GENPD_SYNC_STATE_ONECELL, +}; + struct dev_power_governor { bool (*power_down_ok)(struct dev_pm_domain *domain); bool (*suspend_ok)(struct device *dev); @@ -193,6 +199,7 @@ struct generic_pm_domain { unsigned int performance_state; /* Aggregated max performance state */ cpumask_var_t cpus; /* A cpumask of the attached CPUs */ bool synced_poweroff; /* A consumer needs a synced poweroff */ + enum genpd_sync_state sync_state; /* How sync_state is managed. */ int (*power_off)(struct generic_pm_domain *domain); int (*power_on)(struct generic_pm_domain *domain); struct raw_notifier_head power_notifiers; /* Power on/off notifiers */ |