linux-kernel - RE: [PATCH mfd v2] mfd: Add Renesas Synchronization Management Unit (SMU) support

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Date:   Wed, 16 Jun 2021 15:07:17 +0000
From:   Min Li <min.li.xe@...esas.com>
To:     Lee Jones <lee.jones@...aro.org>
CC:     "sameo@...ux.intel.com" <sameo@...ux.intel.com>,
        "grant.likely@...aro.org" <grant.likely@...aro.org>,
        "robh+dt@...nel.org" <robh+dt@...nel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "devicetree@...r.kernel.org" <devicetree@...r.kernel.org>
Subject: RE: [PATCH mfd v2] mfd: Add Renesas Synchronization Management Unit
 (SMU) support

> >
> > Hi Lee
> >
> > The PHC driver already existed in the current tree as
> > drivers/ptp/ptp_clockmatrix.c and ptp_idt82p33.c
> >
> > Right now, they act as i2c driver. I plan to change them as a normal
> > platform device driver after this MFD change kicked in
> >
> > That is why I would prefer the name "phc" instead of "clock" since the
> > driver is not a normal clk driver under drivers/clk but a ptp clock
> > driver. And down the road, we will have our real clock driver and I wanna
> reserve the name "clock" for the real clock driver.
> 
> I see.  To be honest, I wasn't aware of the PTP subsystem.
> 
> In which case, the name needs to match the one in the driver:
> 
>  static struct i2c_driver idtcm_driver = {
>         .driver = {
>                 .of_match_table = of_match_ptr(idtcm_dt_id),
>                 .name           = "idtcm",
>         },
>         .probe          = idtcm_probe,
>         .remove         = idtcm_remove,
>         .id_table       = idtcm_i2c_id,
>  };
> 
> So, "idtcm" in this case.
> 
> How else will it match?
> 

Hi Lee

I actually like to comply with the mfd sub device naming convention by naming it 8a3400x-phc
About the names in ptp clock driver, I will have to change them anyways down the road to
make them work with the mfd driver

Another match doesn't exist in the current tree yet. It would be a normal platform device driver that I
will submit to drivers/misc a little later after this mfd change is merged.

Thanks

Min