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Message-Id: <20240312091638.1266167-1-kory.maincent@bootlin.com>
Date: Tue, 12 Mar 2024 10:16:38 +0100
From: Kory Maincent <kory.maincent@...tlin.com>
To: linux-kernel@...r.kernel.org
Cc: Kory Maincent <kory.maincent@...tlin.com>,
thomas.petazzoni@...tlin.com,
Liam Girdwood <lgirdwood@...il.com>,
Mark Brown <broonie@...nel.org>
Subject: [PATCH] regulator: core: Propagate the regulator state in case of exclusive get
Previously, performing an exclusive get on an already-enabled regulator
resulted in inconsistent state initialization between child and parent
regulators. While the child's counts were updated, its parent's counters
remained unaffected.
Consequently, attempting to disable an already-enabled exclusive regulator
triggered unbalanced disables warnings from its parent regulator.
This commit addresses the issue by propagating the enable state to the
parent regulator using a regulator_enable call. This ensures consistent
state management across the regulator hierarchy, preventing warnings!
Signed-off-by: Kory Maincent <kory.maincent@...tlin.com>
---
drivers/regulator/core.c | 11 +++++++++++
1 file changed, 11 insertions(+)
diff --git a/drivers/regulator/core.c b/drivers/regulator/core.c
index a968dabb48f5..3f499761f8b0 100644
--- a/drivers/regulator/core.c
+++ b/drivers/regulator/core.c
@@ -2274,6 +2274,17 @@ struct regulator *_regulator_get(struct device *dev, const char *id,
if (ret > 0) {
rdev->use_count = 1;
regulator->enable_count = 1;
+
+ /* Propagate the regulator state to its supply */
+ if (rdev->supply) {
+ ret = regulator_enable(rdev->supply);
+ if (ret < 0) {
+ destroy_regulator(regulator);
+ module_put(rdev->owner);
+ put_device(&rdev->dev);
+ return ERR_PTR(ret);
+ }
+ }
} else {
rdev->use_count = 0;
regulator->enable_count = 0;
--
2.25.1
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