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The correct fan rpm value is also a LINEAR11 value but without a factor.
Verified by using the fan test button on the psu to let the fan spin up
to maximum for some seconds.
Fixes: 933222c98445 ("hwmon: (corsair-psu) fix unintentional sign extension issue")
Signed-off-by: Wilken Gottwalt <wilken.gottwalt@posteo.net>
Link: https://lore.kernel.org/r/20201113121954.GA8488@monster.powergraphx.local
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
The shifting of the u8 integer data[3] by 24 bits to the left will
be promoted to a 32 bit signed int and then sign-extended to a
long. In the event that the top bit of data[3] is set then all
then all the upper 32 bits of a 64 bit long end up as also being
set because of the sign-extension. Fix this by casting data[3] to
a long before the shift.
Addresses-Coverity: ("Unintended sign extension")
Fixes: ce15cd2cee8b ("hwmon: add Corsair PSU HID controller driver")
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Link: https://lore.kernel.org/r/20201105115019.41735-1-colin.king@canonical.com
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
The Corsair digital power supplies of the series RMi, HXi and AXi include
a small micro-controller with a lot of sensors attached. The sensors can
be accessed by an USB connector from the outside.
This micro-controller provides the data by a simple proprietary USB HID
protocol. The data consist of temperatures, current and voltage levels,
power usage, uptimes, fan speed and some more. It is also possible to
configure the PSU (fan mode, mono/multi-rail, over current protection).
This driver provides access to the sensors/statistics of the RMi and HXi
series power supplies. It does not support configuring these devices,
because there would be many ways to misconfigure or even damage the PSU.
This patch adds:
- hwmon driver corsair-psu
- hwmon documentation
- updates MAINTAINERS
Signed-off-by: Wilken Gottwalt <wilken.gottwalt@posteo.net>
Link: https://lore.kernel.org/r/20201027131710.GA253280@monster.powergraphx.local
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
