hwmon: (pmbus) Add mutex to regulator ops

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On PMBUS devices with multiple pages, the regulator ops need to be
protected with the update mutex. This prevents accidentally changing
the page in a separate thread while operating on the PMBUS_OPERATION
register.

Tested on Infineon xdpe11280 while a separate thread polls for sensor
data.

Signed-off-by: Patrick Rudolph <patrick.rudolph@9elements.com>
Signed-off-by: Marcello Sylvester Bauer <sylv@sylv.io>
Link: https://lore.kernel.org/r/b991506bcbf665f7af185945f70bf9d5cf04637c.1645804976.git.sylv@sylv.io
Fixes: ddbb4db4ce ("hwmon: (pmbus) Add regulator support")
Cc: Alan Tull <atull@opensource.altera.com>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>

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This commit is contained in:

Patrick Rudolph 2022-02-25 17:06:09 +01:00 • committed by Guenter Roeck

parent 7e57714cd0

commit 686d303ee6

1 changed files with 13 additions and 3 deletions

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drivers/hwmon/pmbus/pmbus_core.c

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