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Message-ID: <20250930120857.2228296-3-o.rempel@pengutronix.de>
Date: Tue, 30 Sep 2025 14:08:57 +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 2/2] regulator: fixed: opt in to downstream event forwarding
Enable supply event forwarding for fixed regulators by registering the
core helper at probe. This allows critical upstream events (currently
REGULATOR_EVENT_UNDER_VOLTAGE) to propagate to consumers of the fixed
regulator, so users like MMC can take emergency action.
No change for regulators without an upstream supply.
Signed-off-by: Oleksij Rempel <o.rempel@...gutronix.de>
---
drivers/regulator/fixed.c | 7 +++++++
1 file changed, 7 insertions(+)
diff --git a/drivers/regulator/fixed.c b/drivers/regulator/fixed.c
index c63d57c5bd27..4d520fc94e05 100644
--- a/drivers/regulator/fixed.c
+++ b/drivers/regulator/fixed.c
@@ -348,6 +348,13 @@ static int reg_fixed_voltage_probe(struct platform_device *pdev)
if (ret)
return ret;
+ ret = register_regulator_event_forwarding(drvdata->dev);
+ if (ret) {
+ dev_err(&pdev->dev, "failed to enable supply event forwarding: %pe\n",
+ ERR_PTR(ret));
+ return ret;
+ }
+
return 0;
}
--
2.47.3
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