diff options
| author | Oleksij Rempel <o.rempel@pengutronix.de> | 2025-10-01 13:56:49 +0300 |
|---|---|---|
| committer | Mark Brown <broonie@kernel.org> | 2025-10-15 12:48:58 +0300 |
| commit | 433e294c3c5b5d2020085a0e36c1cb47b694690a (patch) | |
| tree | d1db111b31ec19be457ec209f27ded093e00e15d /include/linux | |
| parent | 6277a486a7faaa6c87f4bf1d59a2de233a093248 (diff) | |
| download | linux-433e294c3c5b5d2020085a0e36c1cb47b694690a.tar.xz | |
regulator: core: forward undervoltage events downstream by default
Forward critical supply events downstream so consumers can react in
time. An under-voltage event on an upstream rail may otherwise never
reach end devices (e.g. eMMC).
Register a notifier on a regulator's supply when the supply is resolved,
and forward only REGULATOR_EVENT_UNDER_VOLTAGE to the consumer's notifier
chain. Event handling is deferred to process context via a workqueue; the
consumer rdev is lifetime-pinned and the rdev lock is held while calling
the notifier chain. The notifier is unregistered on regulator teardown.
No DT/UAPI changes. Behavior applies to all regulators with a supply.
Signed-off-by: Oleksij Rempel <o.rempel@pengutronix.de>
Link: https://patch.msgid.link/20251001105650.2391477-1-o.rempel@pengutronix.de
Signed-off-by: Mark Brown <broonie@kernel.org>
Diffstat (limited to 'include/linux')
| -rw-r--r-- | include/linux/regulator/driver.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/include/linux/regulator/driver.h b/include/linux/regulator/driver.h index 4a216fdba354..978cf593b662 100644 --- a/include/linux/regulator/driver.h +++ b/include/linux/regulator/driver.h @@ -658,6 +658,9 @@ struct regulator_dev { spinlock_t err_lock; int pw_requested_mW; + + /* regulator notification forwarding */ + struct notifier_block supply_fwd_nb; }; /* |