RE: [PATCH v6 09/11] firmware: xilinx: Add debugfs for clock control APIs

From: Jolly Shah
Date: Fri May 25 2018 - 15:24:04 EST


Hi Sudeep,

> -----Original Message-----
> From: Sudeep Holla [mailto:sudeep.holla@xxxxxxx]
> Sent: Tuesday, May 15, 2018 1:58 AM
> To: Jolly Shah <JOLLYS@xxxxxxxxxx>; ard.biesheuvel@xxxxxxxxxx;
> mingo@xxxxxxxxxx; gregkh@xxxxxxxxxxxxxxxxxxx; matt@xxxxxxxxxxxxxxxxxxx;
> hkallweit1@xxxxxxxxx; keescook@xxxxxxxxxxxx;
> dmitry.torokhov@xxxxxxxxx; mturquette@xxxxxxxxxxxx;
> sboyd@xxxxxxxxxxxxxx; michal.simek@xxxxxxxxxx; robh+dt@xxxxxxxxxx;
> mark.rutland@xxxxxxx; linux-clk@xxxxxxxxxxxxxxx
> Cc: Sudeep Holla <sudeep.holla@xxxxxxx>; Rajan Vaja <RAJANV@xxxxxxxxxx>;
> linux-arm-kernel@xxxxxxxxxxxxxxxxxxx; linux-kernel@xxxxxxxxxxxxxxx;
> devicetree@xxxxxxxxxxxxxxx
> Subject: Re: [PATCH v6 09/11] firmware: xilinx: Add debugfs for clock control
> APIs
>
>
>
> On 14/05/18 20:18, Jolly Shah wrote:
> > Hi Sudeep,
>
> [..]
>
> >>
> >> As I mentioned in earlier patch, I don't see the need for this
> >> debugfs interface. Clock lay has read-only interface in debugfs
> >> already. Also if you want to debug clocks, you can do so using the
> >> driver which uses these clocks. Do you really want to manage clocks
> >> in user-space ? The whole idea of EEMI kind of interface is to
> >> abstract and hide the fine details even from non-trusted rich OS like
> >> Linux kernel, but by providing this you are doing exactly opposite.
> >
> > No we don't want to manage clocks in user-space. This debugfs is meant
> > for developer who wants to debug APIs behavior in case something
> > doesn't work as expected. Debugfs should be off by default in
> > production images.
> >
>
> Good that it's not used in production image. The clock layer has
> *sufficient* debugfs support that will *help in debugging*. So please drop this
> Xilinx specific clock debugfs.
>
> --
> Regards,
> Sudeep

Ok. Will remove them in next version. Let me know if rest changes look ok and I can submit final version with suggested minor changes.

Thanks,
Jolly Shah