ROCKPro64 pwm-fan inoperable
12-31-2019, 08:44 PM
I'm unable to get the fan to work on the RP64 v2.1 in the NAS case with the fan from Pine64 store. Not sure what I'm missing?
The fan is working when supplied with 12V directly. The fan does not work when plugged into the Fan port on the board.
/sys/class/hwmon/hwmon0/pwm1 exists, echoing any value from 0-255 does not have any affect. I read ATS source code to see if maybe I'm missing something. It doesn't appear so.
Attempted to get the fan to work via PWM with the following images from ayufan:
bionic-minimal-rockpro64-0.9.14-1159-arm64.img.xz
buster-minimal-rockpro64-0.9.14-1159-arm64.img.xz
Also tried vanilla arch linux (the pwm-fan is under /sys/class/hwmon/hwmon1/pwm1 on linux-aarch64 (5.4.6)).
And built latest ayufan linux-mainline for arch linux. No functioning fan there either.
A multimeter at the base of Q2110 shows absolutely nothing no matter what I write to /sys/class/hwmon/hwmon0/pwm1 - my oscilliscope is currently not working so I'm unable to see if there is any PWM present on FAN_CTL_H yet - I suspect nothing.
This build is using a SATA card and two SSDs powered from the RP64's 12V header (the cables supplied with the NAS case). To rule out a power issue, I eliminated the SATA card and power to the SSDs - so only the DC power, FTDI cable, and fan are plugged into the RP64. Fan still inoperable on all images listed above.
I read every thread regarding the fan I could find on this forum - and all of them mention ATS. ATS does not work, obviously, because writing the values to /sys/class/hwmon/hwmon0/pwm1 has no effect. And yes, I'm logged in as root.
The fan is working when supplied with 12V directly. The fan does not work when plugged into the Fan port on the board.
/sys/class/hwmon/hwmon0/pwm1 exists, echoing any value from 0-255 does not have any affect. I read ATS source code to see if maybe I'm missing something. It doesn't appear so.
Attempted to get the fan to work via PWM with the following images from ayufan:
bionic-minimal-rockpro64-0.9.14-1159-arm64.img.xz
buster-minimal-rockpro64-0.9.14-1159-arm64.img.xz
Also tried vanilla arch linux (the pwm-fan is under /sys/class/hwmon/hwmon1/pwm1 on linux-aarch64 (5.4.6)).
And built latest ayufan linux-mainline for arch linux. No functioning fan there either.
A multimeter at the base of Q2110 shows absolutely nothing no matter what I write to /sys/class/hwmon/hwmon0/pwm1 - my oscilliscope is currently not working so I'm unable to see if there is any PWM present on FAN_CTL_H yet - I suspect nothing.
This build is using a SATA card and two SSDs powered from the RP64's 12V header (the cables supplied with the NAS case). To rule out a power issue, I eliminated the SATA card and power to the SSDs - so only the DC power, FTDI cable, and fan are plugged into the RP64. Fan still inoperable on all images listed above.
I read every thread regarding the fan I could find on this forum - and all of them mention ATS. ATS does not work, obviously, because writing the values to /sys/class/hwmon/hwmon0/pwm1 has no effect. And yes, I'm logged in as root.