linux-kernel - [PATCH] regulator: debug early supply resolving

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Message-Id: <7ede83e8d78414d8618e1044fd8fd11e8ed7a09f.1604544767.git.mirq-linux@rere.qmqm.pl>
Date:   Thu, 05 Nov 2020 03:54:07 +0100
From:   Michał Mirosław <mirq-linux@...e.qmqm.pl>
To:     Ahmad Fatoum <a.fatoum@...gutronix.de>
Cc:     Corentin Labbe <clabbe.montjoie@...il.com>, lgirdwood@...il.com,
        mripard@...nel.org, linux-kernel@...r.kernel.org, wens@...e.org,
        broonie@...nel.org, linux-arm-kernel@...ts.infradead.org,
        <linux-stm32@...md-mailman.stormreply.com>,
        Pengutronix Kernel Team <kernel@...gutronix.de>
Subject: [PATCH] regulator: debug early supply resolving

Help debugging the case when set_machine_constraints() needs to be
repeated.

Signed-off-by: Michał Mirosław <mirq-linux@...e.qmqm.pl>
---
 drivers/regulator/core.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/regulator/core.c b/drivers/regulator/core.c
index 402a72a70eb1..c84e3b0b63de 100644
--- a/drivers/regulator/core.c
+++ b/drivers/regulator/core.c
@@ -5271,6 +5271,8 @@ regulator_register(const struct regulator_desc *regulator_desc,
 		/* FIXME: this currently triggers a chicken-and-egg problem
 		 * when creating -SUPPLY symlink in sysfs to a regulator
 		 * that is just being created */
+		rdev_dbg(rdev, "will resolve supply early: %s\n",
+			 rdev->supply_name);
 		ret = regulator_resolve_supply(rdev);
 		if (!ret)
 			ret = set_machine_constraints(rdev);
-- 
2.20.1