Re: [PATCH] hwmon: add fan/pwm driver for corsair h100i platinum

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On Wed, Jul 15, 2020 at 01:18:58PM +0200, jaap aarts wrote:
> On Wed, 15 Jul 2020 at 05:07, Guenter Roeck <linux@xxxxxxxxxxxx> wrote:
> >
> > On Tue, Jul 14, 2020 at 12:03:38PM +0200, jaap aarts wrote:
> > > Adds fan/pwm support for H1000i platinum.
> > > Custom temp/fan curves are not supported, however
> > > the presets found in the proprietary drivers are avaiable.
> > >
> > > Signed-off-by: Jaap Aarts <jaap.aarts1@xxxxxxxxx>
> >
> > +Marius Zachmann for input.
> >
> > Questions:
> > - Does this really have to be a different driver or can it be merged into
> >   the corsair-cpro driver ?
> I cannot find this driver at the moment, the only corsair driver I can find
> is the HID driver. As far as I know all asetek gen 6 products use the same
> interface. Out of curiosity I contacted asetek to confirm, but other userland
> drivers have used the same code for all products of previous generations.
> > - What about HID vs. USB driver ?
> This is not really a HID. I asked in the kernel newbies mailing list and
> I was told HWMON is probably the right place. Most of the code is
> related to HWMON so this seems to be the right place to me as well.

Question is if this identifies itself as HID device. If it does,
it would either have to be blacklisted in the HID core, or it would
have to be implemented as hid driver. The latter would be preferred,
since otherwise a userspace application accessing it directly would
no longer work. Either case, the driver can and should still reside
in hwmon; that was not the question.

Thanks,
Guenter



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