linux-kernel - [PATCH v1 0/2] regulator: forward undervoltage events downstream

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Message-ID: <20250930120857.2228296-1-o.rempel@pengutronix.de>
Date: Tue, 30 Sep 2025 14:08:55 +0200
From: Oleksij Rempel <o.rempel@...gutronix.de>
To: Liam Girdwood <lgirdwood@...il.com>,
	Mark Brown <broonie@...nel.org>
Cc: Oleksij Rempel <o.rempel@...gutronix.de>,
	kernel@...gutronix.de,
	linux-kernel@...r.kernel.org
Subject: [PATCH v1 0/2] regulator: forward undervoltage events downstream

This short series lets critical supply events propagate to consumers.
It introduces an opt-in helper in the core to forward
REGULATOR_EVENT_UNDER_VOLTAGE from a regulator's supply to the
consumer's notifier chain, and opts the fixed regulator in at probe.

Only under-voltage is forwarded to avoid surprises. Behavior is
unchanged unless a driver calls the helper. No DT/UAPI/ABI changes.

Oleksij Rempel (2):
  regulator: core: add infrastructure for downstream event forwarding
  regulator: fixed: opt in to downstream event forwarding

 drivers/regulator/core.c         | 113 +++++++++++++++++++++++++++++++
 drivers/regulator/fixed.c        |   7 ++
 include/linux/regulator/driver.h |   5 ++
 3 files changed, 125 insertions(+)

--
2.47.3