hwmon: (max6650) Introduce pwm_to_dac and dac_to_pwm

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Consolidate conversion from pwm value to dac value and from dac value
to pwm value into helper functions.

While doing this, only update the cached dac value if writing it
to the chip was successful after an update. Also, put macro argument
of DIV_FROM_REG() into (), and simplify return statement of
max6650_set_cur_state().

Cc: Jean-Francois Dagenais <jeff.dagenais@gmail.com>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>

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This commit is contained in:

Guenter Roeck 2019-06-07 10:23:17 -07:00

parent 8e5e7ddd38

commit b2905bb8e1

1 changed files with 27 additions and 28 deletions

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drivers/hwmon/max6650.c

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