hwmon: (pmbus/max20730) adjust the vout reading given voltage divider

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Problem:
We use voltage dividers so that the voltage presented at the voltage
sense pins is confusing. We might need to convert these readings to more
meaningful readings given the voltage divider.

Solution:
Read the voltage divider resistance from dts and convert the voltage
reading to a more meaningful reading.

Testing:
max20730 with voltage divider

Signed-off-by: Chu Lin <linchuyuan@google.com>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Link: https://lore.kernel.org/r/20201004031445.2321090-3-linchuyuan@google.com
[groeck: Return -EINVAL instead of -ENODEV on bad deevicetree data]
Signed-off-by: Guenter Roeck <linux@roeck-us.net>

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Chu Lin 2020-10-04 03:14:45 +00:00 • committed by Guenter Roeck

parent b9a9a37543

commit 9b20aec24b

1 changed files with 18 additions and 0 deletions

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drivers/hwmon/pmbus/max20730.c

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