On Mon, Jul 25, 2022 at 10:48 AM Crt Mori <cmo@xxxxxxxxxxx> wrote: > > Hi, > I am implementing the power saving modes for mlx90632 device driver > and while I have implemented routines for SET_RUNTIME_PM_OPS > (runtime_pm_suspend and runtime_pm_resume) I am not able to find out > how to trigger them from the terminal. > > It could be that my driver code for power management implementation is > incomplete and I need to initialize something more. > > Maybe it is helpful, but the power submodule of the device contains below files: > > $ ls -al /sys/bus/iio/devices/iio\:device0/power > total 0 > drwxrwxr-x 2 root gpio 0 Apr 6 14:17 . > drwxrwxr-x 3 root gpio 0 Apr 6 14:17 .. > -rw-rw-r-- 1 root gpio 4096 Apr 6 14:17 async > -rw-rw-r-- 1 root gpio 4096 Apr 6 14:17 autosuspend_delay_ms > -rw-rw-r-- 1 root gpio 4096 Apr 6 14:18 control > -r--r--r-- 1 root gpio 4096 Apr 6 14:17 runtime_active_kids > -r--r--r-- 1 root gpio 4096 Apr 6 14:17 runtime_active_time > -r--r--r-- 1 root gpio 4096 Apr 6 14:17 runtime_enabled > -r--r--r-- 1 root gpio 4096 Apr 6 14:17 runtime_status > -r--r--r-- 1 root gpio 4096 Apr 6 14:17 runtime_suspended_time > -r--r--r-- 1 root gpio 4096 Apr 6 14:17 runtime_usage > > And control is already set to "auto" which according to documentation > should allow the PM. 'auto' should enable it. So, whenever the driver thinks it's a time to power off/on the device it will call the methods. You may hack a bit to enable autosuspend (which often is not a good idea for IIO sensors) and see it done automatically after some time. -- With Best Regards, Andy Shevchenko
