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hwmon: (adt7470) Expose PWM frequency to sysfs

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The ADT7470 supports a variety of PWM frequencies. This patch allows the
frequency to be configured and viewed through the sysfs entry pwm1_freq.

Signed-off-by: Joshua Scott <[email protected]>
Signed-off-by: Guenter Roeck <[email protected]>
This commit is contained in:
Joshua Scott 2016-08-08 13:35:45 +12:00 • committed by Guenter Roeck
commit aa18cc911a
2 changed files with 91 additions and 0 deletions
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17
Documentation/hwmon/adt7470
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@ -65,6 +65,23 @@ from 0 (off) to 255 (full speed). Fan speed will be set to maximum when the
temperature sensor associated with the PWM control exceeds
pwm#_auto_point2_temp.
The driver also allows control of the PWM frequency:
* pwm1_freq
The PWM frequency is rounded to the nearest one of:
* 11.0 Hz
* 14.7 Hz
* 22.1 Hz
* 29.4 Hz
* 35.3 Hz
* 44.1 Hz
* 58.8 Hz
* 88.2 Hz
* 1.4 kHz
* 22.5 kHz
Notes
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