pinctrl in phosphor-hwmon

[Deng Tyler]

I added gpio control in my fan driver but I still met some problem. While
phosphor-hwmon reading fan0_input, the fan tach driver change 2 gpio pin
and sleep 2 seconds to return rpm value for stable. There are 12 fan
sensors in my platform so the phosphor-hwmon need wait 24 senconds at least
to get rpm. The waiting time cause dbus hang while issuing ipmi sensor
command. Do you have any suggestions?

Tyler

Matt Spinler <mspinler at linux.ibm.com> 於 2019年12月11日 週三 上午12:29寫道：

>
>
> On 12/9/2019 11:08 PM, Deng Tyler wrote:
> > Hi Matt:
> >     Thank for your response that's really helpful. I check the link
> > and it seems allow a gpio set to high before/after reading a
> > correspond sensor. Is it possible change 2 gpio to high/low for
> > reading a correspond sensor?
>
> That isn't possible in the current code, but I don't see why someone
> couldn't add that feature.
>
> >
> > Regards,
> > Tyler
> >
> > Matt Spinler <mspinler at linux.ibm.com <mailto:mspinler at linux.ibm.com>>
> > 於 2019年12月9日 週一 下午10:58寫道：
> >
> >
> >
> >     On 12/9/2019 6:15 AM, Deng Tyler wrote:
> >     > Hi all:
> >     >     Does phosphor-hwmon support changing gpio pin before read
> >     > /sys/class/hwmon/hwmon0/fan*_input while monitoring fan sensor?
> >     In my
> >     > platform, fans gpio are connect to pin-mux and I need control gpio
> >     > before get fan tach rpm.
> >
> >     It does have the ability to modify a GPIO before/after a reading:
> >
> https://github.com/openbmc/phosphor-hwmon/blob/master/mainloop.cpp#L447
> >
> >     configured by some lines in the conf file, like:
> >
> https://github.com/openbmc/meta-ibm/blob/master/meta-romulus/recipes-phosphor/sensors/phosphor-hwmon/obmc/hwmon/iio-hwmon-battery.conf#L4
> >
> >     >
> >     > Regards,
> >     > Tyler
> >
>
>
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