hwmon: (aspeed-pwm-tacho) increase fan tach period
commit762b1e88801357770889d013c5d20fe110d1f456
authorPatrick Venture <venture@google.com>
Mon, 11 Sep 2017 22:41:55 +0000 (11 15:41 -0700)
committerGuenter Roeck <linux@roeck-us.net>
Mon, 30 Oct 2017 01:36:03 +0000 (29 18:36 -0700)
treee4db5c5231a055fa8086c62986faa76807d7617c
parentfd53f62160e5fcea18f6adcddd40ba429dc127b6
hwmon: (aspeed-pwm-tacho) increase fan tach period

The previous value reduced the time required to determine
the fan value, however, it's also used as the final timeout
mechanism.  The prevous value would work for any fan speed
greater than around 3k RPM.  This increased value, lets the fan
speeds return quickly but will wait longer to handle speeds below 3k
RPM.

Testing: this value was determined through experimentation on the ast2400
on the Quanta-q71l.  This configurations runs 8 fans attached to the
controller.

Signed-off-by: Patrick Venture <venture@google.com>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
drivers/hwmon/aspeed-pwm-tacho.c