hwmon: Introduce 64-bit energy attribute support

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Many chips require 64-bit variables to display the accumulated energy,
even more so since the energy units are micro-Joule. Add new sensor type
"energy64" to support reporting the chip energy as 64-bit values.

Changing the entire hardware monitoring API is not feasible, and it is only
really necessary to support reading 64-bit values for the "energyX_input"
attribute. For this reason, keep the API as-is and use type casts on both
ends to pass 64-bit pointers when reading the accumulated energy. On the
write side (which is only useful for the energyX_enable attribute), keep
passing the written value as long.

Reviewed-by: Chris Packham <chris.packham@alliedtelesis.co.nz>
Tested-by: Chris Packham <chris.packham@alliedtelesis.co.nz> # INA780
Signed-off-by: Guenter Roeck <linux@roeck-us.net>

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This commit is contained in:

Guenter Roeck 2024-08-28 21:56:57 -07:00

parent da0a3cc73a

commit 0bcd01f757

4 changed files with 19 additions and 9 deletions

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3

Documentation/hwmon/hwmon-kernel-api.rst

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16

drivers/hwmon/hwmon.c

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1

include/linux/hwmon.h

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10

include/trace/events/hwmon.h

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