linux-kernel - [PATCH] Revert "hwmon: (pmbus) Add regulator supply into macro"

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Message-Id: <20221104234622.2444747-1-linux@roeck-us.net>
Date:   Fri,  4 Nov 2022 16:46:22 -0700
From:   Guenter Roeck <linux@...ck-us.net>
To:     linux-hwmon@...r.kernel.org
Cc:     linux-kernel@...r.kernel.org, Guenter Roeck <linux@...ck-us.net>,
        Marcello Sylvester Bauer <sylv@...v.io>,
        Zev Weiss <zev@...ilderbeest.net>
Subject: [PATCH] Revert "hwmon: (pmbus) Add regulator supply into macro"

This reverts commit 54cc3dbfc10dc3db7cb1cf49aee4477a8398fbde.

Zev Weiss reports that the reverted patch may cause a regulator
undercount. Here is his report:

... having regulator-dummy set as a supply on my PMBus regulators
(instead of having them as their own top-level regulators without
an upstream supply) leads to enable-count underflow errors when
disabling them:

    # echo 0 > /sys/bus/platform/devices/efuse01/state
    [  906.094477] regulator-dummy: Underflow of regulator enable count
    [  906.100563] Failed to disable vout: -EINVAL
    [  136.992676] reg-userspace-consumer efuse01: Failed to configure state: -22

Zev reports that reverting the patch fixes the problem. So let's do that
for now.

Fixes: 54cc3dbfc10d ("hwmon: (pmbus) Add regulator supply into macro")
Cc: Marcello Sylvester Bauer <sylv@...v.io>
Reported-by: Zev Weiss <zev@...ilderbeest.net>
Signed-off-by: Guenter Roeck <linux@...ck-us.net>
---
 drivers/hwmon/pmbus/pmbus.h | 1 -
 1 file changed, 1 deletion(-)

diff --git a/drivers/hwmon/pmbus/pmbus.h b/drivers/hwmon/pmbus/pmbus.h
index 7daaf0caf4d3..10fb17879f8e 100644
--- a/drivers/hwmon/pmbus/pmbus.h
+++ b/drivers/hwmon/pmbus/pmbus.h
@@ -467,7 +467,6 @@ extern const struct regulator_ops pmbus_regulator_ops;
 #define PMBUS_REGULATOR_STEP(_name, _id, _voltages, _step)  \
 	[_id] = {						\
 		.name = (_name # _id),				\
-		.supply_name = "vin",				\
 		.id = (_id),					\
 		.of_match = of_match_ptr(_name # _id),		\
 		.regulators_node = of_match_ptr("regulators"),	\
-- 
2.36.2