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hwmon: (occ) Delay hwmon registration until user request

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[ Upstream commit 849b0156d9 ]

Instead of registering the hwmon device at probe time, use the
existing "occ_active" sysfs file to control when the driver polls
the OCC for sensor data and registers with hwmon. The reason for
this change is that the SBE, which is the device by which the
driver communicates with the OCC, cannot handle communications
during certain system state transitions, resulting in
unrecoverable system errors.

Signed-off-by: Eddie James <eajames@linux.ibm.com>
Link: https://lore.kernel.org/r/20220427140443.11428-1-eajames@linux.ibm.com
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Stable-dep-of: 70e76e700f ("hwmon: occ: validate poll response sensor blocks")
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Eddie James 2022-04-27 09:04:43 -05:00 • committed by Greg Kroah-Hartman
commit bc8a327267
5 changed files with 156 additions and 90 deletions
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