On Wed, Sep 14, 2022, at 8:12 PM, Guenter Roeck wrote: > On Wed, Sep 14, 2022 at 05:30:27AM +0000, Mathew McBride wrote: > > The Microchip EMC230X (formerly made by SMSC) family of fan controllers > > provide PWM control for up to 5 fans (in the EMC2305). The EMC230X is > > capable of maintaining (closed-loop) a target RPM speed through PWM. > > > > This driver has been tested with the EMC2301 (on our Traverse Ten64 > > appliance) and with the EMC2305 demo board (ADM00879). > > > > The driver is by no means complete, for example, further work would > > be required to support the different PWM output frequencies for > > voltage-based fan speed control. (So far this driver has only been > > tested with direct PWM capable fans, like the 4 pin fans found > > in recent PCs) > > > > The emc230x driver also has thermal subsystem integration which allows > > the emc230x-controlled fan(s) to be used as cooling devices. > > I just accepted a driver or emc2301/2/3/5. Please submit improvements > on top of that driver if needed; we won't have competing drivers > for the same chip in the kernel, and replacing a just accepted driver > smply does not make any sense. My apologies, I was unaware of the separate effort! Mine has been out of tree for a long time and I finally had time to work on it recently. There are several changes I can see that need to be made to the accepted one to work for our usecase. > Guenter >
